Three-way trust reconciliation is the process of verifying that three separate records all show the same balance: your trust account bank statement, your checkbook register or general ledger cash balance, and the sum of all individual client ledger balances. If any of these three numbers differ from the others, you have a problem that needs to be identified and resolved.

Here’s what that looks like in practice. At the end of each month, your bank statement shows a certain balance in your IOLTA account. Your accounting software shows what you believe is in the account based on recorded deposits and disbursements. And your client ledger cards show how much of that total belongs to each individual client. When you add up all the client ledger balances, that sum should equal both the bank statement and your book balance.

The California State Bar requires this reconciliation to protect client funds. Trust accounts hold money that belongs to clients, not the firm. Unearned retainers, settlement proceeds waiting for disbursement, funds held for costs. The three-way reconciliation proves that every dollar in the account is accounted for and that the firm hasn’t accidentally or intentionally misused client money.

When the three amounts don’t match, it signals specific types of problems. If the bank statement differs from your books, you may have outstanding checks, deposits in transit, bank errors, or unrecorded transactions. If your book balance differs from the sum of client ledgers, you’ve either recorded something incorrectly or failed to allocate a transaction to the right client. Both situations need immediate attention.

Discrepancies often start small. A $50 bank fee gets deducted from the trust account and nobody notices. Interest gets credited and isn’t allocated. A check clears for a different amount than recorded. Without monthly three-way reconciliation, these small errors compound until the accounts are a mess and you can’t figure out what went wrong or when.

Law firms should perform three-way reconciliation monthly at minimum. Many Los Angeles bookkeeping services that work with attorneys recommend doing it within the first week after month-end while transactions are fresh. Waiting until quarter-end or year-end makes finding and fixing discrepancies significantly harder.

Software helps but doesn’t eliminate the need for careful review. Clio tracks client ledgers and integrates with QuickBooks, which makes pulling the three numbers together easier. But the software only works if transactions are entered correctly in the first place. Garbage in, garbage out.

The consequences of failing to maintain proper trust accounting can be severe. The State Bar conducts random audits, and trust account violations are taken seriously. Beyond the regulatory risk, commingling or misappropriating client funds can end careers. Law firm trust accounting requires careful attention precisely because the stakes are so high.

If your firm hasn’t been doing three-way reconciliations or they’ve been inconsistent, getting caught up is possible but takes work. Starting with clean, accurate reconciliations going forward is easier than reconstructing years of history. The important thing is to establish the process and stick to it monthly without exception.