Customer Free Credit Balances — SEC Rule 15c3-3 Reserve Account Segregation
Recording the liability for uninvested customer cash in brokerage accounts and the required segregation in the Special Reserve Account under SEC Rule 15c3-3.
| Account Name | Type | Debit ($) | Credit ($) |
|---|---|---|---|
| Special Reserve Bank Account (Segregated — Rule 15c3-3) | Asset (+) | 850,000,000.00 | - |
| Payable to Customers — Free Credit Balances (Rule 15c3-3 Liability) | Liability (+) | - | 850,000,000.00 |
💡 Accountant's Note
SEC Rule 15c3-3 (the Customer Protection Rule) requires broker-dealers to hold a 'Special Reserve Account' — a segregated bank account holding cash or US government securities equal to the weekly Reserve Formula computation (net amount owed to customers). This prevents the firm from using customer cash to fund proprietary trading. The Reserve Formula: customer credits minus customer debits (margin loans) plus various adjustments. The computed amount must be deposited by the first business day after computation. Deficiency is among the most severe regulatory violations — MF Global's 2011 bankruptcy, in which $1.6B of customer funds were found missing, is the defining example of what happens when customer segregation fails.
Practitioner & Systems Framework
💻 ERP Architecture
Weekly Reserve Formula computation aggregates all customer credits and debits across all accounts. The required reserve is deposited in the Special Reserve Account — held at a bank, completely segregated from ALL firm operating accounts, containing only cash or US Treasury securities. Any deficiency at any computation date is a regulatory violation regardless of whether later cured.
⚠️ Audit Flags
SEC Rule 15c3-3 Reserve Formula compliance is a primary audit engagement area for registered broker-dealers. Auditors independently recompute the weekly Reserve Formula and confirm the Special Reserve Account balance directly with the bank. Any deficiency at any weekly computation during the year is a reportable violation.
📄 Required Documentation
All weekly Rule 15c3-3 Reserve Formula computations for the year, Special Reserve Account bank confirmations (independent of firm), customer account aggregate balance reconciliation, Reserve Formula audit trail, FINRA/SEC examination correspondence, and SIPC membership documentation.
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