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And for most, tax season only adds to the pile. Between tracking expenses, organizing forms, and figuring out deductions, it’s another demanding task that takes time away from billable work—and when tax prep is rushed, overlooked details can quickly become costly.
Even if you’re doing your best to stay on top of it all, tax compliance can still feel like a moving target. The forms are confusing. Deadlines can be missed. And if you manage client trust accounts, you’re dealing with an entirely separate layer of rules and reporting requirements.
So yes, tax season might be predictable. But that doesn’t mean it’s easy—or that you should be expected to navigate it all alone.
This guide breaks down everything you need to know to manage your law firm’s tax obligations confidently. From what taxes you owe and which deductions apply, to the forms, deadlines, and tools that actually make this easier—we’ve got you covered.
1. Determine the taxes you owe
Federal income tax
No matter how your firm is structured, you’ll pay federal income tax on profits:
- Sole props and partnerships: You report firm profits on your personal return (Form 1040). The firm itself doesn’t pay taxes; you do.
- S-Corps: The firm files Form 1120-S, but profits pass through to owners via Schedule K-1 — and are taxed on your personal return.
- C-Corps: The firm pays taxes directly on profits via Form 1120, and you’re taxed again if you take dividends — that’s double taxation.
Even if your firm doesn’t pay federal taxes directly, the income still flows through to you. If your firm made money, the IRS expects to see that reflected on your return.
Also read: Schedule K-1 Tax form for partnerships: All you need to know to file
Self-employment tax
If you’re a sole proprietor, partner, or member of an LLC that hasn’t elected S-Corp status, you’re responsible for self-employment tax — that’s 15.3% on your net income, covering both the employer and employee side of Social Security and Medicare.
Even if your firm reinvested profits or you didn’t take a formal paycheck, if there was income, you owe SE tax.
S-Corp owners: You don’t have to pay self-employment tax on distributions, but you do pay it on your salary. The IRS requires you to pay yourself a reasonable salary via payroll — and that salary is subject to payroll tax.
Payroll tax
If your firm has a staff — paralegals, assistanst, associate attorneys — or you’ve elected S-Corp status and pay yourself a salary, you owe:
- Social Security & Medicare (FICA): You withhold the employee’s share and pay the employer’s portion.
- Federal Unemployment Tax (FUTA): Reported on Form 940, this is paid by the firm, not deducted from paychecks.
- State unemployment taxes (SUTA): Varies by state but generally required if you have employees.
Even paying a relative to help out part-time can trigger payroll tax obligations. Don’t skip this step just because you “only have one person.”
Additional filing obligations
Depending on your firm’s setup, you may also need to file:
- 1099-NEC: If you paid $600+ to a contractor, expert witness, investigator, or freelance consultant, you must issue this form.
- 1099-MISC: For other payments not tied to services (e.g., rent).
- Form W-2: If you’re an S-Corp owner taking payroll or if you have employees.
Missing or misfiling these forms can trigger penalties.
Also read: 1099-NEC vs 1099-MISC: Differences, deadlines, and how-to’s
2. Gather the right tax forms
Whether you’re filing as a sole prop, partnership, or S-Corp, staying organized with the right forms is step one to avoiding last-minute chaos — and penalties.
Here’s a breakdown of the most common forms law firms need to file or issue:
| Forms | Who is it for? | What is it for? | Due dates |
| 1040 + Schedule C | Sole proprietors / single-member PLLCs | Report income and expenses from the firm on your personal tax return | April 15 |
| 1065 + Schedule K-1 | Partnerships / multi-member PLLCs | Partnership tax return; K-1s show each partner’s share of income | March 15 |
| 1120-S + K-1 | S-Corporations (including PLLCs that elected S-Corp status) | Pass-through entity tax return; K-1s issued to owners | March 15 |
| 1120 | C-Corporations (rare for small firms) | Corporate tax return; firm pays its own taxes | April 15 |
| 1040-ES | Sole props, partners, S-Corp shareholders | Estimated tax payments for income not subject to withholding | April 15, June 15, Sept 15, Jan 15 |
| 1099-NEC | If your law firm is paying contractors or experts $600+ | Report non-employee compensation (e.g., experts, freelance attorneys, consultants) | January 31 |
| 1099-MISC | Firms paying rent, awards, or other reportable income types | Miscellaneous payments not related to services | January 31 |
| W-2 | Employers (including S-Corp owners on payroll) | Report employee wages and withholdings | January 31 |
| 940 | Employers with staff | Annual Federal Unemployment Tax (FUTA) return | January 31 |
| 941 | Employers with staff | Quarterly payroll tax return (Social Security, Medicare, income tax withheld) | End of each quarter |
Note: If you paid expert witnesses, investigators, or other vendors directly from a client trust account, the IRS still expects you — not the client — to issue a 1099-NEC. If you selected, hired, or supervised these vendors, you are considered the “payor” in the eyes of the IRS.
Also read: What is trust accounting in law firm bookkeeping?
3. Review outstanding invoices and billable time
Uncollected invoices and unbilled time can significantly affect your bottom line and, in turn, your taxable income. Before you wrap up the year, you must ensure that all work done is appropriately billed and that any outstanding invoices are cleared. Doing so keeps cash flow steady and ensures you report your income correctly.
Here’s how to handle it efficiently:
Collect A/R before year-end or write it off
If you have unpaid legal fees and outstanding invoices, make sure to collect them. This will impact your taxable income for the year, so it’s important to either receive payment or decide whether they’re uncollectible.
You can document uncollectible payments as bad debt and write them off. The IRS allows you to deduct uncollected amounts under specific circumstances, but you must prove that you’ve made a reasonable effort to collect. This could mean showing records of phone calls, emails, or collection notices you sent.
Also read: Understanding your AR accounts: What every small business needs to know
Catch up on time entries
If you’ve neglected to enter billable time throughout the year, now is the time to reconcile your records. Go through each case and make sure all time worked is logged correctly. Missed time entries equal missed income, which could be taxed as income in the following year instead of the current one.
Use legal billing software
This is how using legal billing software can keep things streamlined:
- Automated reminders: You can set up automated reminders for clients about overdue invoices or for yourself about pending billable hours that need to be logged. These nudges ensure you’re not leaving any money on the table.
- Year-end reports: You can use your billing software to generate year-end reports of all outstanding invoices and billable time. This will help you identify any discrepancies and give you a clearer view of your firm’s financial situation, making tax preparation much easier.
4. Reconcile bank statements and operating accounts
Take time to compare your bank statements with your accounting records to ensure every transaction is properly recorded. Any discrepancies should be investigated and corrected before filing. This includes payments made through business credit cards for legal fees, office supplies, and other expenses — keeping track of these ensures you don’t miss out on valuable deductions.
For law firms, especially those managing client trust accounts, reconciling your operating accounts is critical, too. You must ensure that client funds are properly allocated and that no funds are co-mingled. This is essential not only for compliance but also for accurate tax reporting.
5. Verify trust account and IOLTA are adequately managed
Trust account management is critical for law firms, especially when it comes to IOLTA accounts (Interest on Lawyers’ Trust Accounts). These accounts are meant to hold client funds until they’re either spent on their behalf or returned. They must be handled with the utmost care, and ensuring they remain properly reconciled is a matter of compliance and ethical responsibility.
As part of your tax prep, it’s essential to verify that all client funds are correctly allocated. Take time to cross-reference each transaction between your operating accounts and client trust accounts. Ensure there’s no co-mingling of client funds with your firm’s operating funds—this is one of the primary mistakes that can lead to severe penalties.
Consider the case of Donald MacLachlan, a lawyer from New Jersey. MacLachlan was disbarred after taking $91,749 from a client trust account for personal expenses, including paying for his daughter’s horseback riding lessons.
For lawyers, the lesson is clear: keep your trust accounts separate, your records accurate, and your funds properly allocated to avoid ending up in a similar situation.
Also read: Law firm bookkeeping: how to avoid common trust accounting mistakes
6. Finalize owner’s draw
Make sure you’ve reconciled any outstanding owner draws before year-end. This is especially important if you’ve made advance distributions or taken an uneven draw throughout the year. If you’ve overdrawn, it could affect your firm’s taxable income, so it’s a good idea to balance everything out before filing taxes.
Lastly, don’t forget to clean up any business expenses related to your owner’s compensation—things like travel expenses, business meals, or continuing legal education (CLE) costs—before the year ends. These expenses may be deductible, and timing them correctly can help lower your taxable income.
7. Maximize tax deductions available to you
As a law firm owner, maximizing your deductions is one of the best ways to reduce your taxable income and lower your tax liability.
Here are some of the deductible expenses:
Practice management tools
Whether it’s subscription fees for legal research platforms or case management software (e.g., Clio or MyCase), these expenses are fully deductible.
Bar fees and CLE
Membership dues to your state bar association and any legal associations are deductible. Likewise, the costs of continuing legal education (CLE) courses are also deductible.
Legal malpractice insurance
As a lawyer, malpractice insurance is a must-have. The premiums you pay for coverage are deductible, so keep records of your insurance policy payments throughout the year.
Client-related expenses
If you’re paying for client-related expenses such as expert witnesses, travel for cases, or deposition costs, those are deductible as well. Just make sure the expenses are directly tied to the work you’re doing on behalf of a client. You may also be able to deduct court fees, filing fees, and even the costs of legal publications.
Retirement contributions
One of the best ways to reduce your taxable income is by contributing to a retirement plan. Whether you have a Solo 401(k), SEP IRA, or Simple IRA, contributions made to these accounts are tax-deferred, which means they reduce your taxable income for the year.
For solo practitioners, this can be a significant way to both save for the future and lower your tax bill in the present. If you have employees, offering a retirement plan to them can also be deductible.
Travel expenses
If you’ve traveled for business—whether it’s attending a legal conference or meeting with a client—your transportation costs, lodging, and meals can be deducted. Be sure to keep accurate records, including receipts and notes on the purpose of the trip.
Also read: 5 best mileage tracker apps to track business travel miles in 2025
Marketing and advertising
Legal firms allocate nearly half of their annual budget—49%—toward marketing efforts. This investment covers everything from digital ads and SEO services to website maintenance and print campaigns. Luckily, these marketing expenses are fully deductible
8. Review last year’s return
Before filing this year’s return, take a moment to review last year’s. This step is essential for spotting any missed deductions, carryovers, or errors that could carry over into the new filing. By comparing year-over-year figures, you can also identify discrepancies or patterns that might raise red flags with the IRS.
Ensuring continuity in your reporting is especially important if your firm’s structure has changed—such as shifting from a sole proprietorship to an S-Corp—so you’re not caught off guard by inconsistent filings.
9. File your taxes timely
Depending on your firm’s structure, you’ll either file your taxes directly (for sole proprietors and partnerships) or submit corporate returns (for S-Corps and C-Corps).
Solo practitioners or small firms can file using IRS e-file for quicker processing. If you have more complex filings, such as trust account reconciliation or deductions related to client funds, working with a dedicated bookkeeper ensures accuracy and compliance.
Make sure to double-check all figures before submitting—especially your firm’s taxable income, owner’s compensation, and any carryovers or prior-year losses.
10. Create a tax strategy for next year
A well-thought-out tax strategy isn’t just about filing this year’s return—it’s about building a framework that helps your firm maximize deductions, reduce liabilities, and stay compliant year-round.
And it all starts with strong bookkeeping practices. Here’s what you need to do:
1. Maintain up-to-date books year-round
Consistent and accurate bookkeeping is the bedrock of any successful tax strategy. Set aside time each month to review your income and expenses. Use practice management software to automate billing, track client payments, and categorize expenses as they happen. This prevents scrambling for receipts and account statements during tax season.
Also read: The role of accurate bookkeeping in tax preparation and compliance
2. Track financial metrics regularly
Monitoring key financial metrics, such as profitability, cash flow, and debt, helps you stay on top of your firm’s financial health and plan for tax savings. With your bookkeeping system in place, you can regularly track these metrics to identify trends and opportunities to optimize your tax position.
For example, if you notice that your cash flow is tight, you may decide to defer some revenue or accelerate expenses before year-end to reduce taxable income. Similarly, if you’re planning for a major expansion, you can adjust your strategy to take advantage of deductions related to new hires or capital expenditures.
3. Build a contingency fund for taxes
An often-overlooked aspect of tax planning is building a contingency fund to cover your tax obligations. This fund is designed to cover unexpected tax liabilities, estimated payments, and any adjustments you may need to make throughout the year. Set aside a portion of your firm’s income in a separate account to ensure you’re never caught off guard when taxes are due.
With regular bookkeeping practices in place, you’ll have a clear view of how much money your firm is making, allowing you to plan accordingly and avoid tax surprises at year-end.
The bottom line
Staying compliant during tax season is critical—but handling everything yourself isn’t practical. As a lawyer, your time is better spent serving clients, not sorting through receipts, tracking expenses, or second-guessing deductions. And even if you carve out the time, you likely don’t have the tax expertise to do it efficiently or accurately.
Hiring an in-house finance team may not be realistic, especially if you’re running a solo practice or just starting out. That’s where CoCountant comes in.
We offer expert bookkeeping services for lawyers so you can stay on top of tax filings, deductions, and deadlines. From billing and trust account tracking to expense categorization and audit-ready financials, we manage the back office so you can focus on your practice.
FAQs
How do I handle taxes for a law firm with multiple partners?
For partnerships, taxes are reported via Form 1065, and individual partners report their share of profits on their personal tax returns via Schedule K-1. Each partner is responsible for paying taxes on their share of the firm’s income, whether they receive a distribution or reinvest the funds back into the business.
What if my law firm’s income fluctuates significantly throughout the year?
If your firm’s income is inconsistent, it’s important to stay on top of your estimated tax payments. For tax planning, you might consider setting aside a percentage of your income each quarter to cover taxes.
