California Client Trust Accounts: The IOLTA and Commingling Rules Every Lawyer Needs
Client trust account discipline is the single fastest way a California lawyer loses a license. Unlike most ethics violations, trust-account mistakes are easy to prove — the bank records either show mixed funds or they don’t — which is exactly why the State Bar polices Rule 1.15 so aggressively, and why “IOLTA” and “commingling” are among the highest-stakes topics on the California Bar Exam.
California’s Client Trust Account Protection Program (CTAPP), rolled out in 2023, now requires every active California-licensed attorney who handles client funds to register their trust account with the State Bar annually and complete a compliance self-assessment, with random audits authorized. If you are advising a California practitioner — or sitting for the Bar — you need to understand not just the rule, but the practical mechanics behind it.
What Is Commingling, and How Is It Different From Misappropriation?
Commingling is mixing a lawyer’s own money with client funds in a trust account — a serious ethics violation even if every dollar is fully accounted for and no client ever loses money. Misappropriation is the unauthorized use of client trust funds — taking money the client did not authorize the lawyer to use — and it is treated as a presumption of theft, ordinarily resulting in disbarment even if the money is quickly restored.
Commingling often precedes misappropriation, but the two are analytically distinct. A lawyer can commingle without misappropriating anything — for example, depositing a personal check into the trust account and simply leaving it there, untouched.
The Core Rule: Segregate, Don’t Borrow
Rule 1.15 (CRPC 1.15) requires that all client money — including unearned fee advances and litigation expense deposits — be held in a separate, clearly labeled client trust account until it is earned or the client is entitled to it. The lawyer may never borrow from that account, for any reason, no matter how temporary.
| Conduct | Commingling | Misappropriation |
|---|---|---|
| Depositing a personal check “as a cushion” for bank fees | Yes | No |
| Leaving earned fees sitting in trust past the point they were earned | Yes | No |
| Transferring trust funds to cover a personal medical bill, even if repaid days later | — | Yes (presumed theft) |
| Using one client’s trust funds to cover a shortfall in another client’s account | — | Yes (“robbing Peter to pay Paul”) |
IOLTA: Where the Interest Goes
Nominal or short-term client deposits go into a pooled IOLTA (Interest on Lawyer Trust Accounts) account. The interest earned is remitted to the State Bar’s legal aid fund, not to the client or the lawyer, because the interest any single small or short-term deposit would generate wouldn’t cover the cost of separate accounting.
If a client’s funds are large enough, or will be held long enough, that the interest they would earn exceeds the cost of a dedicated account, the lawyer must instead open a separate interest-bearing account for that client’s benefit and pay the client the net interest. Defaulting a large or long-held deposit into the pooled IOLTA account when it should have its own interest-bearing account is itself a violation.
The Narrow Exceptions to the Commingling Ban
- Bank charges — a lawyer may deposit personal funds solely to cover anticipated bank fees, but only the amount reasonably necessary. A $500 “cushion” to cover a $10 monthly fee is commingling, not a legitimate buffer.
- Mixed funds — from a settlement that includes the lawyer’s contingency fee, the lawyer must withdraw her earned portion promptly and may never touch the disputed portion.
- Disputed fees — the disputed amount stays in trust until resolved; the undisputed amount goes to the client immediately.
- California’s flat-fee exception — an advance flat fee may go directly into the lawyer’s operating account, bypassing trust, if the client receives written notice of the right to have it held in trust and, for fees over $1,000, agrees in writing to operating-account placement. The ABA Model Rules recognize no comparable exception; absent a jurisdiction-specific carve-out, an advance flat fee is held in trust until earned.
Worked Example: The Disputed Settlement
Maria, a California personal-injury lawyer, receives a $100,000 settlement check for her client, Devon. She deposits it into the firm’s client trust account. Devon disputes the fee — he says they agreed on 15%, Maria says 30%. Even the 15% low estimate ($15,000) belongs to Maria; only the disputed spread between 15% and 30% ($15,000) is contested.
Maria must immediately pay Devon the undisputed $70,000 (the amount Devon concedes is his even under Maria’s higher fee claim) and hold the remaining $30,000 in trust until the dispute is resolved by negotiation, mediation, or California’s mandatory fee-arbitration program under Business and Professions Code § 6200. She cannot transfer any of the disputed portion to her operating account, and she cannot delay paying the undisputed portion while the dispute is pending.
Record-Keeping Requirements
Both the ABA and California regimes require complete financial records for five years after termination of the representation. California goes further, requiring a written ledger for each client and a written journal for each trust account, maintained contemporaneously — not reconstructed later from memory or bank statements.
Common Mistakes
- Believing rapid restoration cures misappropriation — it doesn’t; the violation is judged at the moment of the unauthorized taking.
- Treating “padding” a bank-charges deposit as harmless because the underlying purpose is legitimate.
- Leaving earned fees in trust instead of withdrawing them promptly once earned.
- Depositing an advance flat fee without the California-required written client consent.
- Defaulting a large or long-held client deposit into IOLTA instead of a separate interest-bearing account.
FAQ
Is commingling always disbarment-level misconduct?
No. Commingling alone — mixing funds without any unauthorized use — is a serious but lesser violation than misappropriation. Misappropriation, the actual unauthorized use of client funds, is what typically triggers disbarment.
Do I have to open a new IOLTA account for every client?
No. Nominal or short-term deposits are pooled in one IOLTA account. Only funds large or long-held enough that the interest would exceed separate-accounting costs require their own interest-bearing account.
What is CTAPP and do all California lawyers have to comply?
CTAPP is the State Bar’s Client Trust Account Protection Program. Every active California lawyer who handles client funds must register their trust account annually and complete a compliance self-assessment, and accounts may be subject to random audit.
Key Takeaways
- Commingling is mixing funds; misappropriation is unauthorized use — they carry very different severity.
- All client funds go into a labeled trust account, held until earned or owed to the client.
- IOLTA pools small/short-term deposits; large or long-held funds need a separate interest-bearing account.
- California’s flat-fee exception lets advance fees skip trust with proper written client consent — the ABA has no equivalent.
- CTAPP now requires annual registration and self-assessment for every California lawyer who handles client funds.
This article is educational and is not legal advice. Consult a licensed California attorney about your situation.
Related guides
- attorney liens in California
- California attorney discipline vs. malpractice
- lawyer loans to clients in California
- conflicts of interest