Law Firm Taxation: What Every Partner Needs to Know

Darrin T. Mish

Tax Attorney • 32+ Years Experience

The tax-relief industry loves to make IRS problems sound impossible without them. They're not. I'm Darrin Mish. I've been representing taxpayers before the IRS for 32 years. Let me explain how this actually works.

I'm Darrin Mish. Tampa tax attorney, 32 years in, more than $100 million in IRS debt resolved. What follows isn't theory – it's what I've actually watched work.

Most lawyers know contracts, torts, maybe criminal procedure. Tax? That's where the confidence evaporates. You've spent years mastering your practice area, billing 1,800 hours annually, and building equity in your firm. Then April rolls around and you're staring at a K-1 you don't understand, wondering why your tax bill is higher than your actual cash distributions. Law firm taxation doesn't work like W-2 employment or even like most small businesses. The structure is unusual, the timing is punishing, and the IRS doesn't care that you're busy.

Why Law Firm Taxation Is Different

Most law firms operate as partnerships or limited liability companies taxed as partnerships. The IRS treats these structures as pass-through entities-income flows directly to the partners rather than being taxed at the firm level first. That sounds simple until you realize you're taxed on your share of firm income whether or not the firm actually distributed that cash to you. Your K-1 might show $300,000 in income, but if the firm only distributed $180,000 because it's holding reserves or funding overhead, you still owe tax on the full $300,000.

This creates cash-flow problems that catch new partners off guard. You're paying estimated quarterly taxes on phantom income-money you earned on paper but haven't touched. Miss those estimates and you're facing underpayment penalties in addition to the tax itself.

Partnership taxation vs. cash distribution

Partnership vs. Corporation: What Actually Matters

A few firms elect S corporation status. Fewer still operate as C corporations, though that's mostly legacy Big Law holdovers from before LLCs became standard. The structural choice drives everything-how income is reported, how you withdraw money, how payroll taxes apply, and what happens when you retire or leave.

In a partnership, your draw isn't a salary. It's a distribution of profits or, in some cases, a guaranteed payment. IRS Publication 541 explains the distinction in exhaustive detail, but here's the short version: guaranteed payments are fixed amounts paid regardless of firm profit (think base draws for junior partners), and they're deductible by the partnership but ordinary income to you. Distributions are your share of profit after all expenses, including those guaranteed payments. Both appear on your K-1. Neither has withholding. That's why so many partners underpay.

S corporations let you split income between wages (subject to payroll tax) and distributions (not subject to self-employment tax). That can save serious money if your draw is high enough. But you have to run actual payroll, withhold taxes, file 941s quarterly, and pay yourself a "reasonable salary" before taking distributions. The IRS watches that closely. Pay yourself $60,000 on a $400,000 distribution and expect a challenge.

Entity Type Self-Employment Tax Payroll Compliance Profit Distribution
Partnership Full 15.3% on all income None Simple draws, K-1 reporting
S Corporation Only on W-2 wages Quarterly 941, annual W-2/W-3 Distributions above wages
C Corporation N/A (double taxation) Yes Dividends taxed at shareholder level

Guaranteed Payments and Partner Draws

Most firms use a hybrid compensation model. Junior partners get guaranteed payments-a fixed monthly or quarterly amount that doesn't fluctuate with firm profitability. Senior partners take draws against their capital accounts, which are essentially their equity stake in the firm. Both are taxable income. Neither comes with a W-2. You won't see federal withholding, Social Security, or Medicare taken out, which means you're responsible for the full tax bill when you file your 1040.

Guaranteed payments are treated as ordinary income and subject to self-employment tax. That's 15.3% right off the top-12.4% for Social Security (up to the wage base, $176,100 in 2026) and 2.9% for Medicare on everything, plus an additional 0.9% Medicare surtax on income above $200,000 for single filers or $250,000 for married filing jointly. Add your marginal income tax rate on top of that and you're often looking at a combined federal rate north of 45% before you even think about state tax.

Draws from capital, by contrast, aren't separately taxed because you've already been taxed on your share of the firm's income. The distribution is just moving money from the firm's account to yours. But-and this trips people up constantly-your taxable income was determined when the firm closed its books, not when you took the distribution. You could take zero distributions in 2026 and still owe tax on your full K-1 allocation if the firm was profitable.

Basis, At-Risk, and Passive Loss Limits

Your basis in the partnership determines how much loss you can deduct if the firm has a bad year. Start with your initial capital contribution, add your share of income and additional contributions, subtract distributions and your share of losses. Sounds straightforward until you add partnership debt. In a general partnership, your basis includes your share of all firm debt. In an LLC treated as a partnership, only recourse debt (debt you're personally liable for) increases your basis unless you're a managing member with economic risk of loss.

This matters when the firm borrows to cover payroll during a slow quarter or finances a new office build-out. That debt can increase your basis, which means you can deduct more losses if things go south. But if you're a limited partner or non-managing member, the at-risk rules might limit your deduction even if your basis is sufficient. And if you're not actively involved in firm management (rare for lawyers, but it happens in of-counsel arrangements), the passive activity loss rules can suspend your deductions until you have passive income to offset them or dispose of your interest entirely.

Partner basis calculation

State Tax Complications for Multi-State Firms

Open an office in a second state and your tax life gets measurably worse. Now you're dealing with apportionment-how much of your income is sourced to each state-and whether you owe tax as a nonresident in states where the firm has offices or clients. Some states source service income based on where the work is performed. Others use where the client is located (market-based sourcing). A few use a cost-of-performance method that looks at where the firm incurs its expenses.

If you're a Florida partner in a firm with offices in New York and California, you might owe New York and California tax on income apportioned to those states even though you never leave Tampa. Recent state and local tax developments show how aggressively states are auditing professional service firms, especially those with remote workers or multi-state client bases. The pandemic made this exponentially more complicated-partners working from home in one state while their "office" is in another created nexus and apportionment issues that still haven't been fully litigated.

Some states offer credits for taxes paid to other states, but the calculations are a mess and the credits are rarely dollar-for-dollar. You end up paying a blend of rates, filing multiple returns, and hoping your accountant got the apportionment formula right. And if your firm has a case that generates a large contingency fee tied to a client in a high-tax state? You might owe tax there even if you never set foot in the state.

Trust Account Rules and Tax Reporting

Client trust accounts aren't taxable to the firm (the money isn't yours until it's earned), but interest earned on those accounts generally is. Most states require IOLTA accounts-Interest on Lawyers Trust Accounts-where the interest goes to fund legal aid programs rather than to the firm. But if you're holding a large settlement for a client in a non-IOLTA account for an extended period, that interest is taxable to someone, and you need to report it correctly.

The State Bar of California ethics resources cover trust account reporting in detail, and while those are California-specific, the principles apply nationwide. Commingling funds, even accidentally, can create both ethics complaints and tax headaches. The IRS has gone after firms that misreported trust account activity, especially when client funds were used to cover firm expenses and then "reimbursed" in ways that blurred the income recognition timeline.

Quarterly Estimated Payments and Safe Harbor

You're required to pay estimated taxes quarterly if you expect to owe $1,000 or more when you file. For most law firm partners, that's a given. Miss a payment or underpay and you'll owe interest and penalties under Section 6654. The safe harbor rules protect you if you pay at least 90% of the current year's tax or 100% of last year's tax (110% if your adjusted gross income was over $150,000). But those thresholds assume stable income. If your K-1 allocation jumps because the firm had a banner year, last year's safe harbor won't cover you and you're stuck paying the shortfall plus penalties.

Most partners estimate based on last year's K-1 and then scramble in Q4 when the firm's accountant previews this year's numbers. That's too late to avoid the penalty if your income spiked in Q2. The IRS calculates penalties by quarter, so even if you true up by year-end, you'll owe for the quarters you underpaid. You can use the annualized income installment method if your income is uneven-large contingency fees, for example-but that requires projecting quarterly income accurately and filing Form 2210 with your return.

  • Q1 (April 15): 25% of required annual amount
  • Q2 (June 15): Another 25%
  • Q3 (September 15): Another 25%
  • Q4 (January 15 of the following year): Final 25%

If you're also dealing with payroll tax issues from a prior business or personal tax debt, missing estimated payments compounds the problem fast.

The Centralized Partnership Audit Regime (BBA)

Since 2018, the IRS has audited partnerships under the Bipartisan Budget Act rules. Instead of auditing each partner individually, the IRS audits the partnership and assesses any tax at the partnership level unless the firm elects to push the liability out to the partners. That sounds fine until you realize it means the current partners could be paying tax on income that was allocated to former partners years ago.

The IRS instructions for Form 1065 outline the partnership representative requirements and the election options, but here's the practical version: your firm needs to designate a partnership representative (not just a tax matters partner anymore), and that person has sole authority to bind the firm in an audit. If the IRS adjusts income upward for 2023 and the firm doesn't elect a push-out, the 2026 partners pay the tax even though they might not have been partners in 2023.

You can elect to push the liability to the reviewed-year partners, but that requires filing amended returns for everyone who was a partner in the year under audit, and it has to be done within 45 days of the final determination. Miss that window and the current partnership pays. This is a disaster if your partnership turned over or if a former partner is judgment-proof.

BBA partnership audit process

Retirement and Buyout Tax Issues

When you retire or leave the firm, your buyout is usually structured as guaranteed payments under Section 736(a) and a sale or exchange under 736(b). The Section 736(a) portion-payments for your share of unrealized receivables and goodwill (if not capital)-is ordinary income to you and deductible to the firm. The 736(b) portion-your capital account and share of firm assets-is treated as a sale, potentially eligible for capital gains treatment if structured correctly.

This is where law firm taxation gets genuinely complicated. If your partnership agreement allocates goodwill to capital, your buyout is mostly capital gain. If it doesn't, you're taking ordinary income on that portion. The firm wants to deduct as much as possible, which pushes toward 736(a). You want capital gain treatment, which pushes toward 736(b). The agreement usually controls, but the IRS will recharacterize if the substance doesn't match the form.

And if you're taking payments over time-say, five years of annual installments-you're recognizing gain over that period. You might still have partnership income from the year you left (your K-1 for the stub period), plus installment gain, and if the firm isn't withholding on the installments (they usually aren't), you're making estimated payments on that too.

Cross-Border and International Considerations

Some firms represent foreign clients or have partners who aren't U.S. citizens or residents. That triggers withholding obligations under Sections 1441–1446. If the partnership has foreign partners, it generally has to withhold tax on that partner's allocable share of effectively connected income and remit it quarterly using Form 8813. Miss that and the partnership is on the hook for the tax itself, plus penalties.

Foreign clients paying U.S. law firms for services performed in the U.S. generally don't trigger withholding (services are sourced where performed, and domestic services to a foreign client aren't usually FDAP income subject to Chapter 3 withholding). But if you're billing for work performed abroad, or if you have a foreign branch office, the sourcing and withholding rules get harder fast. Deloitte’s VAT and indirect tax resources cover how VAT applies when you're billing clients in the EU or UK, which is increasingly common for firms handling cross-border transactions or international disputes.

What Happens When You Ignore Law Firm Taxation

I've seen partners come in owing $200,000 because they treated draws like paychecks and never made estimated payments. The firm's accountant sent K-1s every March, but the partner filed extensions, then never filed at all, and the IRS eventually caught up. By that point, penalties and interest had ballooned the balance.

The IRS doesn't forgive self-employment tax. It doesn't care that you didn't take a distribution equal to your K-1 income. And if you owe enough, you're looking at liens, levies, and wage garnishments-though for partners, "wage" garnishment usually means seizure of your draws or bank levies against your personal accounts.

Penalty Abatement and Resolution Options

If you've already fallen behind, penalty abatement is the first move. Reasonable cause abatement works if you can show circumstances beyond your control-illness, bad advice from a tax preparer, disaster. First-time penalty abatement is administrative and easier: if you've been compliant for the prior three years, the IRS will often waive failure-to-file and failure-to-pay penalties for one year. That can cut your balance significantly.

For the underlying tax, installment agreements or Offers in Compromise are the main tools. Installment agreements let you pay over time-up to 72 months in many cases. An Offer in Compromise settles the debt for less than the full amount if you can prove you can't pay in full and probably never will. But the IRS analyzes your income carefully, and if you're a partner pulling $400,000 annually, they're not settling for pennies. They'll want financial statements, profit-and-loss for the firm, and a hard look at whether you can borrow against your partnership interest.

Resolution Method Best For Timeline Impact on Credit
Penalty abatement Compliance issues, one-time failure 60–90 days Reduces balance only
Installment agreement Ongoing income, can't pay in full now 30–60 days to set up Lien often filed
Offer in Compromise Financial hardship, low future income 6–12 months Lien remains during review
Currently Not Collectible Temporary hardship, no income 30–45 days No payments but interest accrues

How Recent Federal Proposals Affect Law Firm Taxation

There's been ongoing discussion in Congress about capping or eliminating the state and local tax (SALT) deduction for high earners. Partners in high-tax states like California, New York, and New Jersey already hit the $10,000 SALT cap on their individual returns, which means they're paying state tax that used to be federally deductible and now isn't. Analysis from the Tax Foundation shows how various proposals would treat business-level SALT for pass-through entities. Some plans would let partnerships deduct state tax at the entity level before income passes through, which effectively bypasses the individual cap. Others would eliminate the cap entirely or raise it.

If your effective state rate is 10% and you're in the 37% federal bracket, every dollar of state tax you can't deduct federally costs you 37 cents. Multiply that across a $500,000 K-1 and it's real money. Firms in states that enacted entity-level SALT workarounds (where the partnership pays state tax and passes through a credit to partners) have seen some relief, but those regimes are complex and not every state offers them.


Law firm taxation is every bit as technical as the cases you litigate, and mistakes cost more than most partners expect. If you're staring at a K-1 you don't understand, estimated payments you didn't make, or a balance due that's already growing interest, call someone who does this full-time. For 32 years, the Law Offices of Darrin T. Mish, P.A. has worked with professionals-including lawyers-facing tax debt, unfiled returns, and IRS collection actions. Free initial consultation, nationwide representation, plain answers. Let's talk.