How Many Trust Accounts Does a Law Firm Actually Need?

Most law firms need one pooled IOLTA account, and that’s the whole answer for the majority of practices. A second account becomes necessary when a single client’s funds are large enough, or will be held long enough, that the interest they could earn is worth more than the cost of administering a separate account. At that point the interest belongs to the client rather than to the state’s IOLTA program, and pooling it is the wrong call.

The test is about the client’s economics, not the firm’s convenience.

Why the pooled account exists at all

An IOLTA account pools client funds that are individually too small or too short-held to earn meaningful net interest. The interest on the pooled balance goes to the state’s IOLTA program, which typically funds legal aid. That structure exists because administering a separate interest-bearing account for a $2,000 retainer held for six weeks would cost more than the interest it earned, so the alternative was earning nothing at all.

The firm never receives that interest, and never can. Our overview of what IOLTA is and how the rules work covers the mechanics.

When one client’s funds need their own account

Every jurisdiction frames the test slightly differently, and the substance is consistent: if the funds could earn net interest for the client after accounting for the cost of a separate account, they should be in one.

Three factors drive it:

Amount. A large settlement, an estate distribution, or a real estate closing balance can be significant enough that even short-term interest is real money.

Expected duration. Funds held for a week rarely clear the threshold at any size. Funds held while a lien is negotiated, an appeal runs, or a minor reaches majority almost always do.

Administrative cost. Account fees, tax reporting, and the work of tracking a second account. This is the denominator in the test, and it’s a real number.

Two situations come up often enough to name. A disputed lien holdback on a personal injury settlement can sit for months, and the amount is often substantial. A minor’s settlement may be held for years, which makes a separate interest-bearing account the obvious answer in most jurisdictions. Our guide to the rules for holding settlement funds when there are third-party liens covers the compliance side.

Some jurisdictions publish a dollar threshold or a duration guideline. Many leave it to the lawyer’s judgment and expect the reasoning to be documented. Check your state’s rule, and write down why you decided what you decided.

What changes in your books when a second account appears

This is the part that catches firms out, and it’s the reason “just open one” isn’t the end of the decision.

Another bank asset account. The separate interest-bearing account needs its own account in your chart of accounts, not a sub-line of the pooled one.

Another liability, or a clearly segregated portion of the existing one. Whatever structure you use, the balance owed to that one client must be readable on its own.

Another three-way reconciliation, every month. Each trust account reconciles independently. Two accounts means two monthly reconciliations, two sets of documentation, two sets of records to retain.

Interest that has to be tracked and reported to the right party. In the pooled account, interest goes to the IOLTA program and the firm barely touches it. In a client-specific account, the interest is the client’s income, which usually means tax reporting in the client’s name. Interest posting to a client-specific account should never increase the firm’s income, and it should never be absorbed into the pooled trust liability.

None of that is difficult. It is, reliably, twice the work, which is exactly why the test weighs administrative cost.

What doesn’t require a second trust account

Worth stating, because firms open accounts they don’t need:

• Separate practice areas. One pooled IOLTA serves the whole firm.
• Separate offices, unless you’re licensed in multiple states with conflicting rules. Multi-jurisdiction practice is its own question; our guide to which state’s IOLTA rules apply for remote attorneys covers it.
• Keeping one client’s funds “clearly separate.” Individual client ledgers do that inside one pooled account. Opening a bank account to solve a bookkeeping problem is solving it at the wrong layer, and it doubles your reconciliation load permanently.

That last one is the common error. If the reason for a second account is that you can’t tell whose money is whose in the first one, the fix is per-client ledgers, not another bank account. Our guide to client ledgers and what they prove covers the structure.

Frequently asked questions

How many trust accounts does a law firm need? One pooled IOLTA account for most firms, plus a separate interest-bearing account for any client whose funds are large enough or held long enough to earn meaningful net interest.

What’s the difference between an IOLTA and a client trust account? IOLTA is a pooled trust account where the interest goes to the state’s legal aid program. A client-specific trust account holds one client’s funds, and the interest belongs to that client.

Who decides whether funds need a separate account? The lawyer, applying the jurisdiction’s test. Document the reasoning; several bars expect to see it.

Does a second trust account mean a second reconciliation? Yes. Every trust account reconciles independently, every month, with its own documentation.

Can I use one trust account for multiple practice areas? Yes. Practice area doesn’t drive account structure. Individual client ledgers provide the separation the rules require.