More attorneys lose their license over trust account violations than almost any other ethics issue. Most of them didn't intend to break the rules. They just didn't understand them well enough, or they got sloppy during a busy stretch and the sloppiness became a pattern.
IOLTA compliance isn't complicated once you understand the structure. This guide covers what the account is, what goes in it, what never goes in it, and how to manage it without triggering a bar investigation.
This post is part of the billing series for law firm owners. For full financial setup when launching a firm, see How to Start a Law Firm in 2026.
What IOLTA Is and Why It Exists
IOLTA stands for Interest on Lawyers' Trust Accounts. It's a program that requires attorneys to hold client funds in interest-bearing trust accounts, with the interest going to state bar-administered funds for legal aid and law school programs rather than to the attorney or the client.
The underlying concept: attorneys routinely hold client money (retainers, settlement proceeds, escrow funds) that doesn't belong to them. That money must be kept separate from the attorney's own funds and must be held in a way that is safe, traceable, and compliant with bar rules.
IOLTA is mandatory in 49 states (with slight variations). It's not optional. Every attorney who holds client funds, even temporarily, must maintain an IOLTA account.
What Must Go in the Trust Account
The rule is cleaner than most attorneys expect: any money that belongs to a client or a third party in connection with a legal matter goes into the trust account. Full stop.
Specifically:
- Advance fee retainers (the most common). The client's retainer deposit holds in trust until you earn the fees by doing the work.
- Settlement proceeds before disbursement. When a settlement check arrives, it goes into trust. You disburse to the client and pay yourself from trust after providing an accounting.
- Escrow funds held in connection with a real estate or business transaction.
- Any client funds held pending outcome of a matter.
The key question is always: does this money belong to the client, or have I earned it? If the answer is "it belongs to the client," it goes into trust.
What Must Never Go in the Trust Account
This is where attorneys get into trouble. The following must not be in your trust account:
- Your earned fees. Once you've earned a fee and billed the client, transfer the amount from trust to your operating account promptly. Leaving earned fees in trust after billing is a problem (it's commingling).
- Your own funds, with one narrow exception: you may keep a small "bank cushion" (typically $100-$500) in the trust account to cover bank fees that would otherwise overdraw it. More than that is commingling.
- Expense reimbursements you've already paid out of pocket. These are owed to you, not held for the client.
- Advance general retainers that are earned when received (if your bar permits this and your engagement letter specifies it). These go directly to your operating account.
The Commingling Rule
Commingling means mixing client funds with your own. It is prohibited in every jurisdiction and is one of the most frequently disciplined ethics violations in the country.
Commingling happens in two directions:
- Putting your money into the trust account (beyond the narrow bank cushion exception). Don't do it for any reason, even "just temporarily."
- Leaving earned fees in the trust account after they're billed and due. Once the fee is earned, transfer it to your operating account. Letting it sit in trust past the billing date is commingling even though you earned it.
The discipline risk from commingling is severe. Even inadvertent commingling can result in suspension. The protection is simple: strict separation and prompt transfers on a defined schedule.
Record-Keeping Requirements
Every state requires attorneys to maintain detailed trust account records. The minimum required in most states includes:
- A ledger for each client showing all funds received and disbursed on that client's behalf
- A general trust account ledger showing all activity
- Bank statements for the trust account
- Copies of all deposit slips, checks, and wire records
- Three-way reconciliation each month: client ledgers, general ledger, and bank statement must all match
Most state bars require records to be kept for 5-7 years. Some require longer. Know your state's requirement before you start deleting anything.
When and How to Disburse
The sequence for transferring earned fees from trust to operating:
- Do the work.
- Send the client an invoice with a statement showing the trust balance and the amount you're transferring.
- Transfer the invoiced amount from trust to operating.
- Record the transfer in both ledgers and your case management system.
Don't transfer before billing. Don't bill less than you transfer. Keep the documentation. The paper trail is what protects you if the account is ever reviewed.
IOLTA Accounting Software
Managing IOLTA manually in a spreadsheet is how errors happen. Dedicated tools make compliance much more reliable:
- Clio: Has built-in trust accounting that integrates with your billing. Invoices, trust statements, and transfers are handled inside one platform.
- TrustBooks: Standalone IOLTA accounting software ($39/month). Designed specifically for attorney trust accounting. Integrates with QuickBooks for overall firm accounting.
- MyCase: Includes trust accounting in the standard package.
- QuickBooks with a dedicated trust account: Works but requires careful setup and discipline to maintain proper separation. Don't use a standard QuickBooks Chart of Accounts without IOLTA-specific modifications.
Using software that generates three-way reconciliation automatically is not a luxury. It's protection. A manual reconciliation error can look like theft when it's actually a math mistake.
Common Violations and How They Happen
- Overdrafting the trust account. Usually happens when a deposit check bounces or when an attorney transfers before a settlement clears. The bank may cover it; the bar won't overlook it. Use your practice management software to track available balances before authorizing transfers.
- Not running three-way reconciliations. Attorneys who skip the monthly reconciliation usually discover discrepancies months later, by which time they can't trace what happened. Run it monthly. Every month.
- Using trust funds for operating expenses "temporarily." This has ended more legal careers than any other trust account issue. Even if you fully intend to repay it, borrowing from trust is misappropriation.
- Not understanding what "earned" means. Some attorneys believe the retainer is earned when deposited. In most jurisdictions, it isn't. It's earned when the work is done. Your engagement letter's language on this matters and should be reviewed by a bar compliance advisor if you're uncertain.
Trust account compliance is one of the areas where the intersection of billing, ethics, and operations creates real risk. For how trust account rules connect to the broader billing ethics framework, see Legal Billing Ethics: What Every Attorney Must Know. For how retainer agreements work in practice, see What Is a Lawyer Retainer?
Firms that systematize their billing and trust accounting processes handle compliance more reliably than firms that manage it manually. The combination of clear procedures, compliant software, and automated follow-up for billing and retainer replenishment is what keeps the account clean and the bar at a distance. If you want to see how a systematized billing operation works for a firm like yours, book a free audit call.