7 Tax Deductions Law Firm Owners Overlook Beyond the Obvious Ones
Sam's List Editorial | 2026-06-23
7 Tax Deductions Law Firm Owners Overlook Beyond the Obvious Ones You already deduct the rent, the staff, and the Westlaw bill. That part is easy. The expensive misses are the ones your tax software never asks about — and they cost partners real money every April. Featured firm Legal Ease Bookkeeping Brandy Derrick runs Legal Ease Bookkeeping — a Sam's List bookkeeper focused on law firms and property managers. Trust accounting, IOLTA compliance, three-way reconciliations, and owner statements that hold up under a bar or state audit. View profile on Sam's List → “They have made my life a lot easier. For attorneys, managing multiple accounts and especially an IOLTA trust account can be a lot of work. Working with Brandy and her team, it is easy to keep everything straight — every dollar that comes through my accounts is organized and accounted for every week.” — Andrew Deegan · ★★★★★ · Read on Sam's List The biggest law firm tax deductions and tax moves aren't exotic. They're written into the Internal Revenue Code. They just require someone who knows your practice well enough to apply them. Here are seven that get left on the table. 1. Case advances have timing rules — and they're not what most attorneys assume When you front a deposition fee or an expert's invoice in a contingency case, your instinct is to deduct it now. The IRS disagrees. Under Burnett v. Commissioner (5th Cir. 1966) and IRC §162, an advance you expect to be reimbursed is a loan , not an expense — even when repayment depends on winning the case. You don't get the deduction when you write the check. You get it when the cost becomes worthless, typically when the case loses or settles short. Treat those advances as expenses too early and you've taken a deduction the IRS can claw back. Treat them correctly and you still capture every dollar — just in the right year. For a firm carrying a six-figure war chest of advanced costs, the timing difference is real money moving across tax years. This is the single most-blown item on self-prepared law firm returns. It's also the easiest to get right with a bookkeeper who tracks advances as receivables, not expenses. 2. An S-corp election quietly erases self-employment tax If your practice is a sole proprietorship or a partnership, every dollar of profit gets hit with 15.3% self-employment tax on vetted of income tax. An S-corp election changes the math. As an S-corp, you pay yourself a reasonable salary, run payroll tax on that, and take the rest as a distribution that escapes the 15.3%. The...
