What Taxes Does a Small Law Firm Pay? A Complete Guide

2026-08-21

Learn the federal, state, and local taxes small law firms pay, including income, payroll, and self-employment taxes, with practical steps to stay compliant.

Running a small law firm means juggling client work and business administration, and taxes are a big part of that. You need to know exactly which taxes apply to your firm, how they are calculated, and when they are due. This guide breaks down the federal, state, and local taxes that small law firms typically pay, with realistic figures for 2026 and practical steps you can take this week to stay on top of your obligations.

Federal Income Tax

Your firm’s federal income tax depends on its legal structure. Most small law firms are either sole proprietorships, partnerships, LLCs, or S corporations. These are pass-through entities, meaning the firm itself does not pay income tax; instead, profits pass through to the owners, who report them on their personal tax returns.

Sole Proprietorship: Report business income on Schedule C of Form 1040. You pay tax at your individual marginal rate, which ranges from 10% to 37% for 2026.
Partnership: File Form 1065, but the partnership itself pays no tax. Each partner receives a Schedule K-1 and reports their share on their personal return.
LLC: If you are a single-member LLC, you are treated as a sole proprietor for tax purposes. Multi-member LLCs are taxed as partnerships unless you elect corporate status.
S Corporation: File Form 1120-S. Profits pass through to shareholders, who report them on their personal returns. S corp status can help you save on self-employment taxes, but it requires paying yourself a reasonable salary.

If you choose a C corporation (rare for small law firms), the firm pays a flat 21% corporate income tax, and shareholders pay tax on dividends. This creates double taxation, so most small firms avoid it.

Self-Employment Tax

As a business owner, you are responsible for both the employee and employer portions of Social Security and Medicare taxes. This is called self-employment tax, and it applies to your net earnings from self-employment.

Rate: 15.3% in 2026, which includes 12.4% for Social Security (up to the wage base of $176,100) and 2.9% for Medicare (no cap).
Deduction: You can deduct the employer-equivalent portion (half of the tax) when calculating your adjusted gross income.
How to pay: You pay this with your personal income tax, usually through quarterly estimated payments.

If your firm is an S corporation, you only pay self-employment tax on your salary, not on distributions. This can save you thousands of dollars, but the IRS requires that your salary be reasonable for the work you do.

Payroll Taxes

If you have employees, you must withhold and pay payroll taxes. This includes:

Federal Income Tax Withholding: Based on each employee’s W-4 and the IRS withholding tables.
Social Security and Medicare (FICA): Withhold 6.2% for Social Security and 1.45% for Medicare from each employee’s paycheck, and match those amounts as the employer. For 2026, the Social Security wage base is $176,100.
Additional Medicare Tax: Withhold an extra 0.9% on wages over $200,000 (single filers).
Federal Unemployment Tax (FUTA): You pay 6% on the first $7,000 of each employee’s wages, but you can claim a credit of up to 5.4% if you pay state unemployment tax on time, reducing your effective rate to 0.6%.

You must deposit payroll taxes on a semiweekly or monthly schedule, depending on your total tax liability. Use Form 941 to report quarterly, and Form 940 annually for FUTA.

State and Local Taxes

State and local taxes vary widely, but most small law firms face the following:

State Income Tax: If your state has an income tax, you will pay tax on your business profits at the state’s individual or corporate rate. Rates range from 0% (in states like Texas and Florida) to over 13% in California. Some states also have a separate franchise tax or gross receipts tax.
State Payroll Taxes: Most states have their own unemployment insurance tax, and some have disability insurance or paid family leave taxes. Rates depend on your industry and experience rating.
Local Taxes: Some cities and counties impose a business license tax, gross receipts tax, or professional services tax. For example, New York City has a general corporation tax, and San Francisco has a gross receipts tax. Check with your local tax authority.

Sales Tax on Legal Services

Most states do not tax legal services, but a few do. As of 2026, states like Hawaii, New Mexico, and South Dakota impose sales tax on legal services, with rates ranging from 4% to 7%. If you practice in one of these states, you must register for a sales tax permit, collect tax from clients, and file returns. Even in states that exempt legal services, you may owe sales tax on office supplies, equipment, and certain software purchases.

Estimated Quarterly Taxes

Because you do not have an employer withholding taxes, you must pay estimated taxes quarterly. This covers your federal income tax, self-employment tax, and state income tax. The IRS requires you to pay at least 90% of your current year’s tax liability or 100% of the prior year’s liability (110% if your adjusted gross income was over $150,000) to avoid penalties.

Due dates for 2026: April 15, June 15, September 15, and January 15, 2027.
How to calculate: Use Form 1040-ES, which includes a worksheet. You can also pay based on your prior year’s tax to be safe.
Payment methods: Pay online via the IRS Direct Pay system, by phone, or by mail. Electronic payments are recommended for tracking.

Tax Deductions for Law Firms

To reduce your taxable income, take advantage of common deductions:

Office rent and utilities: Deduct the cost of your office space, including rent, electricity, internet, and phone.
Salaries and benefits: Employee wages, health insurance, retirement plan contributions, and worker’s compensation insurance are deductible.
Professional expenses: Bar dues, continuing legal education (CLE) courses, malpractice insurance, and legal research subscriptions.
Equipment and software: Computers, printers, legal practice management software, and case management tools. You can deduct the full cost in the year of purchase under Section 179, up to $1,160,000 for 2026.
Travel and meals: Business travel, client meetings, and meals (deductible at 50%).
Home office: If you have a dedicated space used exclusively for business, you can use the simplified method ($5 per square foot, up to 300 square feet) or actual expenses.

Practical Steps You Can Take This Week

Review your entity structure: If you are a sole proprietor, consider whether electing S corporation status could save you on self-employment taxes. Consult a CPA.
Set up a separate bank account: Keep business and personal finances separate to simplify recordkeeping.
Track your income and expenses: Use accounting software like QuickBooks or Xero to record every transaction.
Mark your calendar: Note the quarterly estimated tax due dates and set reminders.
Consult a tax professional: A CPA who works with law firms can help you with planning and ensure you do not miss deductions.

FAQ

Q: Do I have to pay taxes if my law firm loses money?
A: If your firm has a net loss, you may not owe income tax, but you still have to file a return. You may be able to deduct the loss against other income, subject to passive activity rules. You also may still owe self-employment tax on any net earnings, but if you have a loss, there is no self-employment tax.

Q: Can I deduct my law school loans?
A: No, student loan payments are not deductible as a business expense. However, you may be able to deduct up to $2,500 of student loan interest on your personal return, subject to income limits.

Q: What is the penalty for not paying estimated taxes?
A: The IRS charges a penalty based on the amount you underpaid and the time it was outstanding. The rate is the federal short-term rate plus 3%, compounded daily. You can avoid the penalty by paying at least 100% of your prior year’s tax (110% if your AGI was over $150,000).

Q: Do I need to collect sales tax on my legal services?
A: Only if your state taxes legal services. As of 2026, that includes Hawaii, New Mexico, and South Dakota. Check with your state’s department of revenue to confirm.

The Bottom Line

Small law firms face a complex web of federal, state, and local taxes, including income tax, self-employment tax, payroll taxes, and possibly sales tax. The key to staying compliant is understanding your obligations, keeping accurate records, and making estimated tax payments on time. Work with a CPA who specializes in law firms to optimize your tax strategy and avoid costly mistakes. Start by reviewing your entity structure and setting up a system for tracking income and expenses this week.