60 Series 27 Exam Concepts You Need to Know Before Test Day

FOCUS Part I is filed monthly by every member within 17 business days after month end; carrying and clearing firms also file Part IIA quarterly within 17 business days after quarter end. Filings go through FINRA's regulatory filing system, and the financial and operations principal is responsible for accuracy. Rule 4524 layers supplemental schedules on top: Schedule A, the aggregate indebtedness to net capital ratio computation, is quarterly; Schedule B adds balance sheet detail for carrying firms, also quarterly; Schedule C is annual. The exam tests whether you can match a report to its frequency and deadline, so build a grid: monthly Part I; quarterly IIA plus Schedules A and B plus Form Custody; annual Schedule C.

Memory hook:Part I monthly in seventeen; IIA quarterly in seventeen; custody rides the quarterly train.

GAAP governs how you record; the net capital rule governs what counts. A receivable may be a legitimate asset on the GAAP balance sheet yet fully deducted as non-allowable for net capital. Accrued but unpaid expenses reduce net capital even if GAAP permits deferral. Subordinated loans illustrate the split: GAAP shows them as ordinary debt, but a qualifying subordination agreement under Appendix D adds to net worth. Revenue recognition timing under GAAP rarely matches regulatory recognition. The decision rule is sequence: prepare the books under GAAP first, then walk the trial balance through regulatory adjustments line by line. The exam loves items where GAAP says asset but the rule says deduction.

Memory hook:GAAP records it; the net capital rule decides whether it counts.

FINRA Rule 4523 requires each member to assign every general ledger account to a specific registered principal, who is responsible for the account's accuracy. Suspense accounts get special treatment: they must be identified as such, reviewed at least quarterly, and aged, because stale suspense items hide real problems — unrecorded trades, failed deliveries, misposted cash. Rule 4523.1 adds a reporting trigger: a member with suspense accounts exceeding $25,000 that remain unresolved for more than 30 days must notify FINRA. The mechanism is accountability, since no GL account floats without an owner, plus surveillance, because aged suspense items get deducted or flagged in net capital work. The principal's review is the control.

Memory hook:Every account has an owner; every suspense dollar has an age.

The annual package has moving parts with different destinations. Under 17a-5(d), the audited annual report, with the accountant's report, goes to the SEC within 60 calendar days after fiscal year end; copies also go to FINRA and SIPC. SIPC-6, the general assessment payment form, is filed semiannually with the assessment payment, and SIPC-7 reconciles the assessment annually. Form Custody, which reports where customer and firm securities are held, is filed quarterly along with the FOCUS Part IIA. The exam tests the pairing of document to frequency and recipient: audited financials annually to the SEC, Form Custody quarterly, SIPC forms on their own cycle. Build the matrix and these items become free points.

Memory hook:Audited annual, custody quarterly, SIPC pays twice and reconciles once.

Rule 17a-5(f) sets three gates. Qualification: the accountant must be independent, licensed or certified, registered with the PCAOB, and subject to periodic peer review. Independence: the accountant cannot have a financial stake in the firm or audit its own work in a way that compromises objectivity. Replacement: 17a-5(f)(3) requires notice to the SEC within 30 calendar days after replacing an accountant, describing any disagreements over accounting or auditing matters, and the departing accountant may be asked whether the report can still be relied on. The exam hinges on who qualifies and what triggers notification — a change of accountant is never a purely internal event. Watch for facts suggesting a conflict buried in the fact pattern.

Memory hook:Independent, PCAOB-registered, peer-reviewed — and every replacement gets reported.

When the independent public accountant tells the firm it is not complying with the financial responsibility rules, or identifies a material weakness in internal control over those rules, the firm cannot sit on the information. Under 17a-5(h), the firm must notify the SEC within one business day after receiving the accountant's notification, and FINRA Rule 4120(b) requires parallel notice to FINRA. The firm must also describe the corrective action it is taking. The mechanism is escalation: the accountant reports to the firm, the firm reports to the regulators, and the regulators expect a remediation plan, not just an acknowledgment. The exam tests the direction and speed of notification, so track who learns what and when the clock starts.

Memory hook:Accountant speaks, firm reports — one business day to the SEC.

The risk assessment rules target people, not just numbers. A Material Associated Person is an associated person whose conduct could pose risks to the firm's financial or operational condition — think control persons with disciplinary histories or individuals with significant authority over customer assets. Rule 17h-1T requires the firm to keep records identifying MAPs and the facts that make them risky; Rule 17h-2T requires reporting to the SEC. The decision rule is identification: the firm must determine who qualifies as a MAP, document why, and keep the record current. The exam tests the pairing — 1T is recordkeeping, 2T is reporting — and the trigger facts that make an individual a MAP in the first place.

Memory hook:1T keeps the file; 2T files the report.

Two distinct alarms exist. The early warning notice fires when a firm is still compliant but getting close: under the basic method, when net capital falls below 2% of aggregate indebtedness; under the alternative method, when the tentative net capital to net capital ratio falls below 5%. Notice goes to the SEC, FINRA, and the appropriate exchange within 24 hours after the firm knows. The deficiency notice is more serious: net capital below the minimum means the firm must notify the same parties immediately, and FINRA Rule 4120(a) adds parallel obligations, including business curtailment. The exam's trap is conflating the two — early warning means watch us, deficiency means we are out of compliance.

Memory hook:Two percent says watch; below minimum says stop.

You cannot quietly drain equity. Under 15c3-1(e)(1), a firm must give the SEC at least 20 business days' advance written notice before withdrawing equity if the withdrawal would reduce net capital below 5% of aggregate indebtedness under the basic method, or below 8% of tentative net capital to net capital under the alternative method, or below the minimum requirement. FINRA Rule 4110(c) adds notice to FINRA. The test is prospective: compute the pro forma ratio assuming the withdrawal happens, then decide whether notice is required. The exam's favorite trap is a series of withdrawals — the rule looks at the cumulative effect, so several small withdrawals that together cross the threshold still trigger the notice.

Memory hook:Five and eight, twenty days in advance — count the withdrawals together.

Money and expenses flowing between affiliates must be documented and allocated on a defensible basis. Expense sharing agreements should be written, allocate costs by actual usage or another reasonable formula, and be supported by invoices or records — otherwise shared costs become unallowable deductions or hidden liabilities. Guarantees of affiliate obligations create contingent liabilities that must be deducted from net worth and disclosed. The internal control angle: the financial and operations principal must ensure controls exist over compliance with the financial responsibility rules, including how affiliate balances are recorded, reconciled, and reviewed. The exam tests whether an arrangement is documented, properly allocated, and reflected in the balance sheet — undocumented flow-throughs are the classic wrong answer.

Memory hook:No paper, no allocation, no allowable cost.

Under T+1 settlement, the ex-date typically coincides with the record date, because a purchase executed on the record date settles the next business day — too late for the buyer to appear on the issuer's books. To receive a dividend, the buyer must own before the ex-date. FINRA Rule 11320 governs dates of delivery: a seller must deliver securities with the dividend attached when the contract settles before the ex-date; if delivery occurs after the ex-date, the buyer is still entitled to the dividend from the seller, so the seller delivers the security plus a due bill or cash equivalent. Rule 11140 covers ex-rights and ex-warrants the same way. The exam tests whether you can trace trade date, ex-date, and settlement to the party entitled to the dividend.

Memory hook:T+1 collapses the gap: ex-date is record date.

SEA Rule 10b-10 requires a broker to send a confirmation at or before completion of a transaction. The confirmation must identify the broker, the security, the execution date and time, price, quantity, commission, and settlement date, plus the broker's capacity — agent or principal. Riskless principal trades require both the agency and principal disclosures. There are exceptions and special formats: confirmations for mutual funds and options can satisfy certain requirements through their own documents, and particular transactions between institutions are exempt. The exam tests content and capacity: if the facts show the firm took no inventory risk, the answer usually turns on proper riskless principal disclosure rather than a missing item like settlement date.

Memory hook:At or before completion, and never hide your capacity.

A when-issued contract is a sale of a security before it exists — a new issue released to the market before the issuer delivers certificates. FINRA Rule 11130 sets the mechanics: the contract is marked when-issued, no money changes hands until the security is actually issued and delivery is called, and no dividends or interest accrue to the buyer during the when-issued period. The buyer is not entitled to interim distributions because the security has not been delivered. When the issuer releases the security, the contract settles like any regular-way trade. The exam tests what the buyer does and does not get before delivery — no accruals, no payment, and no distributions until the security is actually in hand.

Memory hook:Nothing moves until the security exists and delivery is called.

These rules are the market's self-help remedies for settlement failures. Under FINRA Rule 11810, if the seller fails to deliver securities, the buyer may send a buy-in notice and, after the prescribed notice period, purchase the securities in the market and charge the defaulting seller the cost difference. Under Rule 11820, if the buyer fails to pay, the seller may sell out the securities to another party and charge the buyer for any resulting loss. The mechanics matter: notice must precede execution, the buying-in party documents costs, and the defaulting party bears the loss. The exam tests the direction — buy-in for undelivered securities, selling-out for unpaid purchases — and the sequencing of notice before execution.

Memory hook:No delivery, buy it in; no payment, sell it out.

ACATS standardizes account transfers. The receiving firm submits the transfer request; the carrying firm must validate it within one business day; and the transfer must be completed within three business days after validation. The customer's assets, positions, and account information move through the automated system, and the carrying firm may not delay or discourage the transfer. Rule 15c3-3(m) adds a customer protection: if a customer transferring an account asks the carrying firm to complete a sell order, the firm must execute it and forward the proceeds to the new firm. The exam tests the timeline — one day to validate, three to complete — and the sell-order obligation, which belongs to the carrying firm, not the receiver.

Memory hook:Validate in one, transfer in three; the old firm finishes the sells.

The 11890 series splits by market. For exchange-listed securities, Rule 11892 defers to the listing exchange's clearly erroneous rules, with FINRA processing review requests. For OTC equity securities, Rule 11893 applies FINRA's own thresholds: a transaction deviating from the reference price by more than the specified percentage may be nullified or adjusted on request. Rule 11894 provides review by the Uniform Practice Code Committee when a party disputes an outcome. The mechanism is a percentage deviation test against a reference price, with a short window to seek relief. The exam's hinge is venue: identify where the security trades first, because the applicable thresholds and review path follow from that classification, and mixing the two rule sets is the standard trap.

Memory hook:Listed or OTC — pick the rule before you pick the answer.

SEA Rule 17a-3(a) requires records to be made promptly in the ordinary course of business, but the timing varies by record type. Memoranda of brokerage orders must be made immediately upon execution; blotters, journals, and customer account records must be kept current, generally by the end of the business day or shortly after the activity they document. The principle is contemporaneity: a record reconstructed weeks later is not a record. The exam tests the match between record type and timing — order tickets immediately, ledger entries promptly, account statements on their cycle. Watch for facts where a firm backfills records before an audit; that pattern is the classic violation, because the rule cares about when the record was made, not whether it eventually exists.

Memory hook:A record made late is a record not made.

SEA Rule 17a-4 sets retention by record type. Ledgers, journals, and certain core records must be preserved six years, with the first two years easily accessible. Blotters, order tickets, confirmations, and customer statements are preserved three years, again with the first two years easily accessible. Electronic storage is permitted under 17a-4(f), but only with a system that preserves records in a non-rewriteable format, automatically verifies quality and accuracy, and serializes original data — plus an undertaking to produce records and an audit system showing when records were accessed. The exam tests the pairing of record to period and the electronic storage conditions; keeping everything on a shared drive fails because accessibility and integrity controls are missing.

Memory hook:Six for the core, three for the rest, two years at your fingertips.

Rule 17a-13 requires a quarterly examination: at least once each calendar quarter, the firm must count or otherwise verify securities in its possession or control and compare the results to its records, investigating and documenting any differences. FINRA Rule 4522 extends the count to securities in transfer or en route, which are easy to lose track of precisely because they are not on the premises. Rule 4160 addresses verification of assets — examining and counting securities and counting money — so the firm can certify its records reflect what it actually holds. The mechanism is physical verification against book position; the exam tests frequency and the follow-up duty to reconcile and document differences, not just count.

Memory hook:Count quarterly, chase the differences, write it down.

FINRA Rule 4370 requires a business continuity plan addressing data backup and recovery, mission-critical systems, alternate physical locations, communications with customers and employees, and continued regulatory reporting — the firm must be able to keep meeting its obligations, including net capital computations and filings, during a disruption. Rule 4517 requires the firm to maintain and promptly update emergency contact information with FINRA so regulators can reach decision-makers when systems are down. The exam tests plan content versus contact logistics: 4370 is the plan, 4517 is the contact roster. Expect items asking which rule covers a specific element, such as customer communication or updating contacts after personnel changes.

Memory hook:4370 plans the recovery; 4517 answers the phone.

Rule 4530 is FINRA's self-reporting pipeline, and the FinOp usually owns the mechanics. Written customer complaints are filed quarterly, and every member — not just firms carrying customer accounts — must also submit a monthly statistical report summarizing complaint activity. Separately, specified events must be reported within 30 calendar days of the firm learning of them: customer-initiated litigation or arbitration claims, regulatory and disciplinary actions, criminal charges, and terminations for cause, among others. The reporting clock starts when the firm learns of the event, not when it finishes investigating. Missed filings surface in exams as supervisory and recordkeeping failures, which is why this rule sits in the books-and-records function.

Memory hook:4530: complaints quarterly, statistics monthly for every member, events within 30 days of learning.

The FN designation is what makes a Series 27 registrant a Financial and Operations Principal. Under Rule 1220(a), the FN registration permits the FinOp to prepare and certify the financial reports FINRA and the SEC require and to supervise the associated recordkeeping. A person whose duties are limited to FinOp functions may qualify through the Series 14 exam instead. Continuing education under Rule 1240 has two parts: the Regulatory Element, which every registered person must complete annually, and the Firm Element, which the firm tailors to its business and personnel. A FinOp who lets registration or CE lapse leaves the firm without a qualified certifying principal.

Memory hook:Series 27 full FN; Series 14 limited FinOp; Regulatory Element returns every year.

Three rules build the supervision ladder. Rule 3110 requires a supervisory system and written supervisory procedures, with designated principals overseeing each area. Rule 3120 goes a step further: the firm must test and verify its supervisory controls annually and report the results, including any amendments made, to senior management. Rule 3130 closes the loop with the annual certification, signed by the CEO or the equivalent officer, stating that the firm has processes to establish, maintain, review, test and modify its policies and that the CEO has approved them. The FinOp's fingerprints are everywhere because financial responsibility compliance is part of what gets certified and filed with FINRA.

Memory hook:3110 builds it, 3120 tests it, 3130 the CEO signs it.

Rule 3310 requires every member to establish and implement an anti-money-laundering program reasonably designed to comply with the Bank Secrecy Act: customer identification, monitoring and reporting of suspicious activity, independent testing, and a designated AML compliance officer approved by senior management. Where a clearing firm and an introducing firm work together, the carrying agreement must specify in writing which firm performs which AML functions. That allocation is operational, not a transfer of accountability. Each firm remains responsible for its own AML compliance regardless of what the agreement says, so a clearing firm cannot contract away its program and neither can the introducing firm.

Memory hook:Allocate AML tasks in writing, but each firm keeps its own accountability.

Rule 3220 caps gifts to employees of other firms at $100 per person per year, but it does not cap legitimate business entertainment. The distinction turns on the giver's presence and the setting: a meal you host with a client contact is business entertainment, while a pair of tickets handed over for the contact to use alone is a gift against the $100 limit. Special-occasion personal gifts, nominal refreshments, and low-cost commemorative or promotional items fall outside the cap. Rule 2121 operates on the same fairness principle for pricing: commissions and markups must be reasonably related to the value of the service, and consideration must be fair.

Memory hook:You attend, it's entertainment; you hand it over, it's a gift.

Rule 3270 covers outside business activities: a registered person must give written notice to the firm before participating, and the firm may impose conditions or restrict the activity. Rule 3280 covers private securities transactions, and the pivot is compensation. If the person receives compensation for a PST away from the firm, the transaction must be recorded on the firm's books as if the firm executed it, and the person must be appropriately registered. Uncompensated PSTs still require written notice and disclosure of the role. Rule 3210 governs the flip side: an associated person needs written firm permission before opening an account at another broker-dealer, and the executing firm must be notified of the association.

Memory hook:Compensated PSTs go on the books; outside accounts need permission plus notice.

Rule 10b-5 is the general antifraud provision, and insider trading exposure reaches the firm through supervisory liability: a member that fails to detect or prevent misuse of material nonpublic information can be charged alongside the individual. ITSFEA added teeth in 1988. Controlling persons face civil penalties up to three times the profit gained or loss avoided, and contemporaneous traders can sue to recover their damages. On the arbitration side, Rule 12200 sends customer disputes to arbitration when an agreement exists or the customer invokes FINRA's rules, while Rule 13200 makes arbitration of most industry disputes mandatory. For the FinOp, both exposures translate into potential liabilities that must be evaluated for disclosure and capital impact.

Memory hook:ITSFEA trebles the controlling person's penalty; customers arbitrate by agreement, industry by mandate.

Paragraph (b) is the custody heart of the Customer Protection Rule: fully paid securities, which carry no customer lien, and excess margin securities, meaning securities equity beyond what secures the customer's debit, must be maintained in the firm's physical possession or control. Possession means the firm holds them; control means they sit at a location where they cannot be pledged or used without the firm's consent. The stock record is the tool, because it shows ownership and location for every position. When securities are not in possession or control, paragraph (d) forces a choice: obtain them within the prescribed timeframes or take a deduction in the reserve computation.

Memory hook:Fully paid plus excess margin: possess it, control it, or reserve against it.

Paragraph (c) defines the places where margin securities can sit and still count as controlled: clearing agencies, registered depositories, transfer agents, banks holding them as collateral, other broker-dealers subject to 15c3-3, and the firm's own vault. Beyond the location list, the rule's exceptions let securities temporarily escape possession without triggering a deduction: securities deposited to clear transactions, securities in transfer, securities in transit, and securities deposited with a clearing agency are the workhorses. The exam logic is simple. If the securities are at an enumerated control location or fit an exception, no deduction. If they are at a non-control location or the exception window lapses, the firm must obtain them or reserve against them.

Memory hook:Control location equals enumerated location; no list, no control, no exception.

The reserve computation runs on a calendar tied to the firm's business: monthly for firms carrying margin accounts, quarterly for those that do not. The computation date is the last business day of the period. Exhibit A mechanics: aggregate customer credits, subtract customer debits, apply the required deductions, and the result is the customer reserve requirement. Compare that figure with the balance in the special reserve bank account; if the account is short, the firm must deposit the difference within one business day after the computation date. The requirement is recomputed fresh each period, so a prior surplus does not carry forward automatically.

Memory hook:Margin means monthly; no margin means quarterly; short account means deposit next business day.

Classification drives everything in Exhibit A. A customer is anyone who causes a credit balance or whose fully paid or excess margin securities the firm holds; cash accounts, margin accounts, and non-purpose loan accounts under Regulation T all count. The rule then carves out noncustomers: general partners of the firm, market makers, other broker-dealers whose proprietary accounts go in the separate PAB computation, and issuers of the securities held. Accounts of the firm's own employees are customers. The trap is mechanical: put a partner's debit in the customer column and you overstate the reserve requirement; classify a broker-dealer's account as a customer and you have misstated both computations.

Memory hook:Partners, market makers, brokers, issuers sit outside; employees are customers.

The PAB computation is Exhibit A's sibling, run separately for proprietary accounts of other broker-dealers. Correspondent balances, such as clearing deposits and similar credits, belong in this computation, and the mechanics mirror the customer formula: aggregate PAB credits, subtract PAB debits, apply deductions, and compare against the separate PAB reserve bank account. The exclusions are where points are won: commissions payable to the correspondent are excluded from the PAB reserve requirement, while dividends and interest payable on PAB accounts are treated as other credits rather than ignored. The result funds a distinct PAB reserve account that is never commingled with the customer reserve.

Memory hook:PAB is Exhibit A's twin: separate computation, separate account, commissions payable excluded.

The reserve lives in special bank accounts held at qualified institutions, and the customer and PAB reserves must be kept in separate accounts. Under paragraph (f), the firm sends the bank a letter establishing that the account is for the exclusive benefit of customers or PAB account holders and that the bank will not lien or offset against it. Paragraph (g) sets the withdrawal discipline: the firm may withdraw only the amount in excess of 105% of the most recent required deposit. The math is a subtraction, balance minus 105% of the requirement, and anything at or below that line stays locked.

Memory hook:105% stays locked; only the excess above it walks out the door.

A free credit balance is cash a customer could withdraw on demand, the money side of the ledger with no securities securing it. Paragraph (j) requires that any free credit balance not carried in a bank account be treated as a cash liability, so it flows into the reserve computation as a customer credit. The companion obligation is disclosure: the firm must notify customers at least quarterly, describing how it handles free credit balances and that the funds are not segregated and may be used in the firm's business. The notification is a standing quarterly task for the FinOp, and the failure mode tested is the customer who was never told.

Memory hook:Free credit balances are liabilities, and quarterly letters remind customers the cash is not segregated.

Paragraph (k) offers two escape hatches from the Customer Protection Rule. Under (k)(1), a broker-dealer that carries no customer accounts and obtains or holds no customer funds or securities is exempt, but it must file an annual report of financial condition and operations with the SEC. Under (k)(2), the exemption also covers firms carrying only proprietary accounts of other exempt broker-dealers or accounts of their own associated persons and general partners. Exempt status is not self-executing in practice: under FINRA Rule 1020, a member must apply for and receive FINRA approval to change its exempt status, and FINRA weighs the firm's financial condition, its business, and its procedures for safeguarding customer assets.

Memory hook:(k)(1) exempts but still reports annually; changing status means FINRA approval first.

Hypothecation rules limit what a firm can do with customer margin securities. The customer's securities may be pledged only to the extent of that customer's indebtedness, never more. Once pledged to a creditor such as a bank, the securities cannot be rehypothecated in excess of 140% of the customer's aggregate indebtedness to the broker; the extra 40% covers the creditor's margin exposure. Rule 15c2-1 adds the priority restriction: an arrangement giving a creditor priority over customer securities is permitted only while the broker's aggregate indebtedness stays within 8 times its net capital. The 140% test is a calculation you should be able to run on a fact pattern in under a minute.

Memory hook:Pledge to the debt, repledge to 140%, priority only under 8 times capital.

Exhibit A does not stop at credits minus debits; it claws back value through deductions. Unsecured accounts, meaning debits not secured by securities in the account, are deducted in full, so a cash-only or unsecured margin account adds nothing to the requirement. Aging applies to open transactions: fails to deliver that remain open beyond the prescribed window are deducted because the customer's receivable is aging into doubt. Concentration charges hit when a single margin debit grows large relative to the firm's capital, forcing a deduction for the excess. Suspense balances get the same aging scrutiny. The exam pattern gives you a list of debits and expects you to know which ones survive.

Memory hook:Unsecured deducted whole, aged fails deducted, concentrated debits clipped. Exhibit A claws back.

The minimum net capital depends on the method and the business. Under the basic method, the general floor is $25,000, but a firm carrying customer accounts or holding customer funds needs $100,000. Under the alternative method, a carrying firm needs $250,000 and an introducing firm $50,000, and a firm carrying the proprietary accounts of other broker-dealers needs $1,000,000. Market makers face their own standard. The exam rarely asks for the number alone; it gives you a fact pattern, carrying or introducing, basic or alternative, and the answer falls out of matching the firm type to the correct floor.

Memory hook:25 and 100 basic; 250 and 50 alternative; a million for carrying other brokers.

The choice between methods is a capital-planning decision. The basic method ties the requirement to aggregate indebtedness, with net capital at least 6.67% of AI and a low floor, which punishes balance-sheet-heavy firms. The alternative method ties the requirement to 2% of customer-related debit balances with higher minimums, but rewards the firm with less punitive haircuts and the ability to operate as a carrying firm; the tradeoff is mandatory compliance with 15c3-3 and stricter reporting. Both methods carry early warning discipline: notice is required when net capital falls below the greater of 120% of the minimum requirement or the method-specific threshold — 2% of aggregate indebtedness under the basic method or a tentative net capital to net capital ratio below 5% under the alternative method.

Memory hook:Basic 6.67% of indebtedness; alternative 2% of customer debits; early warning at the greater of 120% or the method threshold.

Aggregate indebtedness is the denominator of the basic method, and it is essentially total liabilities with carve-outs. Start with all money liabilities plus liabilities secured by a pledge or lien of securities, then subtract the exclusions: approved subordinated debt, deferred taxes, and liabilities already subject to securities haircuts, so the same risk is not charged twice. The classification skill is separating cash liabilities, which count, from deferrals, which generally do not. Deferred income, deferred compensation, and similar items stay out of AI; payables, accrued expenses, and borrowings stay in. AI equals total liabilities minus exclusions, and the basic requirement is 6.67% of the result.

Memory hook:AI is liabilities minus the carve-outs; deferrals stay out, payables stay in.

Under 15c3-1(c)(2)(i), GAAP net worth is only the starting point for net capital. The rule strips out accounting items that flatter the balance sheet. Unrealized losses on securities positions are deducted in full, but unrealized gains are added back only after setting aside a reserve for taxes on those profits. Deferred tax assets are deducted because they may never be realized, while deferred tax liabilities are added back because the tax bill is unlikely to come due. Discretionary liabilities, such as declared but unpaid dividends or discretionary bonuses, are deducted because the firm could pay them at any time. The logic is simple: net capital must reflect real, liquid, after-tax worth.

Memory hook:Losses out in full; gains in only after taxes; deferred tax assets deducted, liabilities added back.

A subordinated loan only helps capital if it truly behaves like capital, and Appendix D defines what that means. The agreement must be written, the proceeds must be subordinated to the claims of general creditors, and the maturity must run at least one year. The lender cannot demand payment early, and repayment during the term requires regulatory approval. When those conditions are met, the liability is excluded from aggregate indebtedness and the proceeds count toward net capital, which is why firms facing capital shortfalls use subordinations as a repair tool. FINRA Rule 4110(e) adds notification requirements for these arrangements. If any Appendix D condition fails, the money is just ordinary debt that inflates the ratio.

Memory hook:Appendix D: written, subordinated, one year minimum, no early repayment without approval.

Net capital measures what a firm could raise quickly to meet obligations, so 15c3-1(c)(2)(iv) removes assets that cannot be converted to cash without delay or loss. The deduction is 100 percent for items like furniture, equipment, leasehold improvements, exchange memberships, prepaid expenses, goodwill, and nonmarketable securities. Receivables from officers, partners, and affiliates are generally non-allowable because related-party balances are notoriously slow to collect. The trial balance review is where this happens: the FinOp examines each asset account and asks whether it could realistically be turned into cash. If the answer is no, the full balance comes out of net worth, no partial credit and no percentage schedule.

Memory hook:If you cannot sell it fast, it is not capital: deduct it all.

Haircuts under 15c3-1(c)(2)(vi) are deductions from net worth for the market risk in proprietary positions, and each product category carries its own charge. Equity securities with a ready market take a 15 percent haircut on market value, long or short. Government securities take charges that scale with maturity: the longer the final maturity, the larger the percentage, so short-dated Treasuries are nearly free while long bonds cost more. Municipal bonds, money market instruments, and preferred stock sit in their own categories. When a ready market does not exist, the charge climbs toward 100 percent. Haircuts apply to the net position in the same security, and they stack with concentration charges rather than replace them.

Memory hook:Fifteen for stock; longer maturity, larger haircut; no ready market, up to one hundred.

A single position big enough to dominate the balance sheet carries risk beyond normal market movement, so 15c3-1(c)(2)(vi)(M)(1) adds a concentration charge. A position is unduly concentrated when its market value exceeds 10 percent of tentative net capital, which is net worth after standard haircuts. The excess over that threshold takes an additional haircut on top of the regular one. Government securities get more room: the threshold is the greater of 10 percent of tentative net capital or $500,000. The calculation runs in two steps: compute tentative net capital first, then compare each position to the threshold and charge only the overage. Diversification risk, not just market risk, is what this deduction penalizes.

Memory hook:Ten percent of tentative net capital triggers it; only the excess gets charged.

Open contractual commitments are binding promises to trade securities that have not yet settled: when-issued and when-distributed purchases, delayed delivery contracts, and firm underwriting commitments. Under 15c3-1(c)(2)(viii), the deduction is the greater of two numbers: the haircut that would apply to the security if it were owned outright, or the potential loss if the counterparty walked away, measured as the difference between the contract price and the current market price. That comparison makes sense, because the firm is exposed both to market movement and to the deal falling through. For when-issued positions, the charge applies to the net long or net short position. The commitment is a real risk even though no securities have changed hands yet.

Memory hook:OCC charge: greater of the haircut or the contract-price loss.

Securities differences arise when the firm's stock record and the depository or counterparty disagree. Under 15c3-1(c)(2)(v), a long securities difference, where securities are owed to the firm, becomes a deduction from net worth if it is not resolved within five business days after settlement. A short securities difference, where the firm owes securities, is included in aggregate indebtedness as a liability on the same aging schedule. Fails to deliver and receive carry their own charges as they age. Secured financing transactions, repos and stock loans, produce a deduction whenever the cash advanced exceeds the haircut-adjusted value of the collateral, because that gap is unsecured counterparty exposure the firm is really carrying.

Memory hook:Long difference drains capital; short difference adds debt; five days to fix either.

Beyond haircuts and differences, several operational items come straight out of net worth. Aged or unexplained suspense balances are deducted because they signal unresolved accounting problems. The fidelity bond deductible is deducted to the extent it exceeds 5 percent of tentative net capital, on the theory that the firm, not the insurer, absorbs that first layer of loss. Unconfirmed trades that remain unconfirmed past the aging window are deducted because the firm cannot verify what it truly owes or is owed. Customer margin deficits are deducted to the extent they are unsecured, since the firm is effectively financing those accounts from its own capital. Each item reflects one principle: capital cannot rest on uncertain or unsupported balances.

Memory hook:Bond deductible counts only above five percent of tentative net capital.

The trial balance review is where receivables earn or lose their place in net capital. The FinOp ages every receivable and asks two questions: how old is it, and what backs it. Noncustomer receivables that are unsecured and aged beyond 30 business days are deducted from net worth, because money owed to the firm that has not arrived in a month is unlikely to arrive at all. Receivables fully collateralized by marketable securities or cash can be allowed, since the collateral stands behind the balance. Customer margin balances follow the margin rules rather than this aging framework. The decision rule stays consistent across the ledger: age plus collateralization determines allowability.

Memory hook:Thirty business days unsecured and uncollected means deducted, unless collateral covers it.

Three related concepts govern how hard a security position is charged. A ready market under 15c3-1(c)(11) exists when independent quotations are available and the firm can transact at or near those prices without materially affecting the market. With a ready market, standard category haircuts apply. Without one, the security is nonmarketable under (c)(2)(vii) and takes a 100 percent deduction, since it cannot be sold at any reliable price. Control securities, where the firm controls the issuer, take higher charges reflecting the difficulty of selling a controlling stake. Restricted securities, subject to Rule 144 resale limits, are charged the greater of the standard haircut or the discount from market value that reflects their restricted status.

Memory hook:No ready market, no capital: nonmarketable means one hundred percent off.

Net capital compliance is not a month-end event. The rule requires firms to maintain required capital at all times, moment to moment, so a firm that dips below the minimum mid-month violates the rule even if the FOCUS report later shows compliance. A hindsight deficiency arises when a later review, audit, or error correction reveals the firm was actually below its requirement at some earlier date, despite having reported otherwise. The violation is not erased by hindsight; it must be reported promptly under Exchange Act Rule 17a-11 and FINRA Rule 4120, and it can trigger business curtailment. The practical lesson for a FinOp: compute capital continuously, and when an error surfaces, the clock on notification starts immediately.

Memory hook:Compliance is moment to moment; a late discovery does not erase an early breach.

A firm meeting only a flat dollar minimum could still pile on debt, so 15c3-1(d) adds a leverage ceiling: the firm may not permit aggregate indebtedness to exceed eight times net capital. The test is a simple ratio, aggregate indebtedness divided by net capital, and it must stay at or below 8. The ceiling binds hardest on firms relying on dollar minimums, since a dollar floor says nothing about leverage. Firms using the alternative method instead satisfy the 2 percent of aggregate customer-related debit balances standard, which ties capital to customer receivables rather than to total liabilities. When the ratio breaches 8 to 1, the fix is reducing liabilities or adding equity, not reclassifying debt as something else.

Memory hook:Eight parts debt to one part capital; the alternative floor is 2% of customer debits, not indebtedness.

As capital weakens, regulation tightens in steps. FINRA Rule 4120 requires prompt notification when a firm falls below its minimum requirement or into early warning territory, and 4120(b) requires business curtailment: a firm below minimum may not expand its business and may not withdraw equity capital without approval. Rule 4130 goes further, letting FINRA impose conditions on members experiencing financial or operational difficulty, such as requiring a higher net capital figure or restricting specific activities. Rule 9557 supplies the expedited procedures FINRA uses to act under 4110, 4120, and 4130, including prompt hearings. The framework is graduated: notification first, then curtailment, then full regulatory control of the firm's operations.

Memory hook:4120 notifies and curtails; 4130 imposes conditions; 9557 speeds the process.

When a broker-dealer sits inside a holding company structure or has affiliates, Appendix C governs how capital is measured across the group. The parent may compute net capital on a consolidated basis, and excess capital can flow between the broker-dealer and qualifying subsidiaries, subject to limits, so capital trapped in a subsidiary is not automatically wasted. But the flow-through is conditional, and Appendix C(d) lists precluded acts that protect the broker-dealer from being used as a piggy bank: the firm may not permit majority-owned subsidiaries or affiliates to borrow on the strength of its capital, pledge its assets, or otherwise trade on its creditworthiness. Consolidation is a privilege with strings, and the strings keep customer-facing capital inside the broker-dealer.

Memory hook:Appendix C: capital can flow up, but affiliates cannot pledge or borrow on it.

Two different rules govern margin at two different moments. Regulation T, the Federal Reserve rule, sets the initial requirement: a customer buying securities in a margin account must deposit at least 50 percent of the purchase price, and payment is due within two business days of trade. FINRA Rule 4210 sets the maintenance requirement that applies afterward: equity must stay at least 25 percent of market value in a long position and roughly 30 percent in a short position, with higher charges for low-priced or concentrated holdings. The maintenance test runs continuously, so a falling stock price can trigger a maintenance call even in an account that satisfied Reg T at purchase. Excess equals equity minus the maintenance requirement.

Memory hook:Reg T is the entry fee; maintenance is the ongoing floor.

FINRA Rule 4210(f) defines a pattern day trader as someone who executes four or more day trades within five business days, provided those trades exceed six percent of the account's total trades in that window. Once designated, the account needs at least $25,000 in equity before any day trading, and the account gets day-trading buying power of up to four times the maintenance excess. That four-to-one leverage is far above the standard two-to-one Reg T buying power, which is exactly why the equity floor exists. If equity drops below $25,000, day trading must stop until the account is restored, and the firm may issue a call rather than automatically force a sale. The designation follows the account, not a single trade.

Memory hook:Four trades in five days, twenty-five thousand dollars, four times buying power.

Regulation T requires payment within two business days of trade date. When a customer genuinely cannot pay on time, a check lost in the mail for example, the firm requests an extension through FINRA's system under Rule 4230. The request must be filed by the payment due date and must state a valid reason; extensions are transaction-specific and granted at the discretion of the reviewing authority, not as a standing courtesy. If no extension is obtained and payment still does not arrive, the firm must liquidate the position, and the customer's account can face restrictions, including a ninety-day freeze requiring payment in advance for future purchases. The discipline is procedural: an unfiled or late request is treated the same as no request at all.

Memory hook:Two days to pay; extension filed through FINRA on time with a reason.

Stock loan and stock borrow are two sides of secured financing in securities. In a stock loan, the firm delivers securities it holds and receives cash collateral, typically set above market value, often around 102 percent, marked to market daily. In a stock borrow, the firm takes in securities to cover a short position or settle a fail and posts the same kind of collateral. The lender earns a fee through the rebate rate on the cash collateral. Because collateral exceeds the value of the securities, net capital treatment focuses on the gap: a deduction applies when the cash advanced exceeds the haircut-adjusted value of the securities, which is unsecured counterparty exposure. Daily marks keep both sides protected against price moves.

Memory hook:Lend stock, take cash above market, mark daily, deduct the unsecured gap.

A repurchase agreement is collateralized borrowing dressed up as a sale: the firm sells securities and agrees to repurchase them at a set price and date, keeping the difference as its interest cost. A reverse repo runs the other way: the firm buys securities agreeing to resell them later, which means it is lending cash and earning interest. Repos let a firm finance inventory at rates cheaper than unsecured borrowing, while the counterparty gets a secured short-term placement. Market risk stays with the firm doing the repo, since the repurchase price is fixed. Net capital treatment follows the financing logic: a deduction applies when the amount financed exceeds the haircut-adjusted value of the collateral.

Memory hook:Repo: sell now, buy back, borrow cash. Reverse: buy now, resell, lend cash.

Two rules keep a firm from treating customers as its own funding source. Regulation T 220.3(c) addresses maintenance of credit: once a margin deficiency exists, the firm may not increase the credit extended, and the deficiency must be cured by payment or liquidation rather than papered over with new purchases. FINRA Rule 3240 prohibits borrowing from or lending to customers unless an exception applies: the customer is itself in the business of lending money and the loan is in the ordinary course of that business, or the arrangement falls within the other narrow categories the rule permits. Permitted arrangements still require documentation and supervisory approval. The policy is straightforward: customer relationships must not become hidden financing channels for the firm.

Memory hook:No borrowing from your own customers; no new credit on a deficiency.