15c3-3 Customer Reserve Formula Calculator

SEC Rule 15c3-3 Exhibit A customer reserve formula: credit items (customer free credit balances, margin credit balances, payables) against allowable debit items (margin-account debits with the 1% collateral haircut, failed-to-deliver debits with the 30-day aging exclusion, other allowable debits) to a reserve requirement, deposit-sufficiency verdict, and line-item receipt. Simplified over a representative subset of Exhibit A line items with a PAB (proprietary-account-of-broker-dealer) variant flag; attests the computation over caller-supplied inputs only, not an audit of those inputs or a determination of regulatory compliance. Whole-rule applicability is assumed rather than tested: the 17 CFR 240.15c3-3(k) exemptions have no inputs, so a broker-dealer within (k)(1) (dealing exclusively in investment-company shares or certain insurance products), (k)(2)(i) (carrying a Special Account for the Exclusive Benefit of Customers), (k)(2)(ii) (introducing on a fully disclosed basis to a clearing broker), or (k)(3) (exempted by Commission order) still receives an Exhibit A reserve computation rather than a not-applicable verdict.

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