What Is Three-Way Reconciliation for a Law Firm Trust Account?

Last updated July 2026.

Three-way reconciliation is the monthly check that ties three independent records of a law firm's trust account to the same number: the bank statement balance, the firm's internal trust ledger, and the total of every individual client ledger. When all three agree to the penny, the money in the trust account matches what the books say and what the firm owes each client. If any one differs, funds are misrecorded or misapplied, and the reconciliation is how you find it before it becomes a shortfall. Most state bars require it monthly under their version of ABA Model Rule 1.15.

The three records being matched

The name comes from the three balances that have to line up. Each is kept independently, which is exactly what makes the match meaningful.

A two-way reconciliation, the ordinary kind most businesses do, only compares the bank statement to the book balance. The third leg, the sum of client ledgers, is what trust accounting adds, and it is the important one. It proves not just that the account balances overall, but that the firm can account for whose money is whose. That is the whole point of holding client funds in trust.

Why bars require it: ABA Model Rule 1.15

The rule behind all of this is ABA Model Rule 1.15, Safekeeping Property, which every state adapts into its own trust accounting rules. It requires a lawyer to hold client and third-party funds separate from the firm's own money, keep complete records of those funds, and preserve the records for a set period after the matter ends, commonly five to seven years depending on the jurisdiction. In practice, complying means keeping three things and reconciling them: a receipts and disbursements journal for the trust account, an individual ledger for each client with funds on deposit, and a periodic reconciliation of the bank statement against both. Many state bars specify that the reconciliation be done monthly. Because the deadlines, retention periods, and exact wording differ by state, check your own jurisdiction's version of Rule 1.15 rather than relying on the model text.

How to do a three-way reconciliation, step by step

The mechanics are the same whether you do it in a spreadsheet, in legal practice management software, or with a bookkeeper. The sequence looks like this:

Start by getting the trust account bank statement as data you can work with, one row per transaction. Reconcile the bank statement to your trust ledger the ordinary way: account for deposits in transit, outstanding checks, and bank fees, until the adjusted bank balance equals the ledger balance. Then run the third leg. Print or export the balance of every client ledger with funds on deposit and add them up. That total must equal the trust ledger balance you just reconciled. If the two agree, the account is in balance three ways. If they do not, the gap tells you a client transaction was posted to the wrong ledger, missed, or duplicated, and you work backward through the dated lines to find it.

The most common trust reconciliation problems

A few issues account for most out-of-balance months. A negative client ledger balance means money was disbursed against one client before their deposit cleared, effectively spending another client's funds, which is a serious violation. A gap between the client ledger total and the trust ledger usually points to a deposit or disbursement posted to the wrong matter. Bank fees charged directly to the trust account are a problem in many states, since the firm's costs should not come out of client funds. And a stale outstanding check that never clears can hide a bookkeeping error. Catching these depends on reading every transaction accurately, which is why clean statement data matters so much.

Why the statement data has to be exact

Trust accounting has no tolerance for a rounding slip. When transactions are hand-keyed off a PDF statement, a single transposed digit or a skipped line quietly puts the three records out of balance, and you lose the reconciliation to hunting for it. Converting the statement into structured rows removes that risk: the amounts arrive as clean numbers, the running balance is preserved so you can confirm nothing was dropped, and the full description stays intact so each deposit and disbursement can be traced to a client. A firm with a busy IOLTA account can post hundreds of trust transactions a month, and a bank statement converter built for law firms turns that stack of statements into reconciliation-ready data in minutes instead of an afternoon of typing.

Keep the trust and operating accounts separate

Reconcile the IOLTA trust account and the firm operating account as two separate exercises, from two separate statements. The core of Rule 1.15 is that client funds never mix with the firm's money. The only transactions that should cross between them are earned fees, moved out of trust to operating after the work is billed and the funds are earned. Handling each statement on its own keeps that line clean and makes an earned-fee transfer easy to show, since it appears as a disbursement on the trust side and a matching deposit on the operating side. Once the rows are clean, you can categorize the transactions and post them to the right ledgers, then archive the structured records for the retention period your bar requires.