Law Firm Trust Accounting: The Three-Way Reconciliation

Most bookkeeping errors cost you money or clarity. Trust accounting errors can cost you your license. That single fact should shape how a firm's books are built.

The rules themselves come from each state bar, and they vary. What does not vary is the underlying discipline, and it is worth understanding even though the compliance determination belongs to you and your bar rather than to your bookkeeper.

The core principle

Money held for a client is not the firm's money. It sits in a trust or IOLTA account, separate from operating funds, and it stays there until it is earned or disbursed.

That means, at minimum: no client's funds used for another client's matter, no firm expenses paid from trust, no trust money moved to operating until the fee is actually earned, and no negative balance on any individual client ledger — ever, even for a day.

That last one is where most technical violations occur. A firm-level trust balance can look perfectly healthy while one client's ledger sits negative, which in practice means that client's matter was funded with another client's money.

The three-way reconciliation

This is the control that catches essentially everything, and it is the thing bars ask about. Three figures have to agree, every month:

1. The trust bank statement balance, adjusted for outstanding items.
2. The trust account balance in your books.
3. The sum of every individual client ledger.

Two out of three agreeing is not a pass. The third is the one that catches the client-level problems — because it is entirely possible for the bank and the books to match perfectly while the client ledgers underneath them are wrong in offsetting directions.

Doing this monthly means an error is at most thirty days old. Doing it annually means reconstructing a year of activity to find a discrepancy of unknown origin.

Where the errors actually come from

Fees swept rather than transferred deliberately. Earned fees move from trust to operating when the work is done and the client has been billed — as a specific, documented transfer for a specific matter. An automated sweep of "whatever is in there" is how unearned money ends up in operating.

Bank fees charged to the trust account. Most banks will happily debit account fees from any account. On a trust account that is firm expense paid with client money. Trust accounts need to be set up so fees are drawn from operating instead.

Deposits released before they clear. Disbursing against a deposit that has not actually cleared means, for a few days, other clients funded it.

Advanced client costs recorded as expenses. Filing fees and expert costs advanced on a client's behalf are receivables, not firm expenses. Expensed, they understate profit and the firm loses track of what it is owed — which for some firms is a substantial number.

Where our work sits

We keep the ledgers accurate: trust and operating strictly separate, each reconciled monthly, client-level detail behind every balance, and the three-way reconciliation performed and documented so it exists if anyone asks for it.

What we do not do is opine on whether your handling satisfies your state bar's rules. Those requirements are set by the bar, they differ between states, and interpreting them is legal work. We are a bookkeeping firm, not a licensed CPA firm and not lawyers — the compliance determination is yours and your bar counsel's.

What we can say is that firms that get into difficulty here almost never do so through dishonesty. They do so through a reconciliation that quietly stopped being done, and nobody noticed for eleven months. That is a bookkeeping failure with legal consequences, and it is entirely preventable with a monthly routine.

More on how we structure it under law firm bookkeeping.

The three ledgers, and why all three are needed

The bank balance is what the institution says you hold. The trust account ledger is what your books say. The client ledgers are what each individual client is owed. Two of the three agreeing proves nothing — a shortfall in one client’s balance offset by a surplus in another nets to zero at the account level.

That is precisely the error the three-way reconciliation exists to catch, and it is why bar rules specify it rather than an ordinary bank reconciliation.

Common ways it goes wrong

Fees withdrawn before they were earned. Bank charges taken from the trust account rather than the operating account. A disbursement made against a client balance that had not yet cleared. Interest handled incorrectly where IOLTA rules apply.

None of these require bad intent, and all of them produce a finding. The rules are strict because the money is not the firm’s.

Practical controls

Never let a client ledger go negative, even briefly. Do not pay firm expenses from trust. Move earned fees to operating on a documented schedule rather than as needed. Reconcile monthly and retain the reconciliation.

Where a firm operates in several states, the applicable rules follow the jurisdiction, and they differ on interest, timing and record retention.

Who should do it

Someone who understands the specific obligation. General bookkeeping competence is not sufficient, and the consequences of an error here are professional rather than financial.