How Does the IRS Prove Compensation Is Unreasonable? (w/Examples) + FAQs

This article reflects federal tax rules as of June 2026 and covers tax years 2025 and 2026. State rules are noted separately where relevant. Tax law changes often — confirm current figures with a licensed professional before you file.

Quick Answer

The IRS proves compensation is unreasonable by comparing your pay to what an arm’s-length employer would pay for the same work, using a multi-factor test or the “independent investor” test. For tax year 2025, it then reclassifies the excess — either as a nondeductible dividend (too high) or as wages owing payroll tax (too low).

The reasonable compensation rule trips up two very different owners. A C-corporation owner who pays too much salary can lose the deduction, because the IRS treats the excess as a disguised dividend taxed twice. An S-corporation owner who pays too little salary can owe years of back payroll tax, because the IRS reclassifies low-tax distributions as wages under IRC § 7436.

The stakes are real and the audits are rising. Reasonable compensation remains one of the most litigated issues facing S corporations, and a single reclassification can pull in back FICA, penalties, and interest across three open tax years at once. The amount in dispute often reaches five or six figures, and the burden usually lands on you to defend your number.

• 🧭 How the IRS picks which way to attack — too-high pay versus too-low pay
• ⚖️ The two legal tests courts use, in plain English, with the leading cases
• 💵 Two fully worked dollar examples showing the exact tax at risk
• 🚩 The seven mistakes that turn a quiet return into an audit target
• 🛡️ The records and steps that defend your salary before the IRS asks

What “Reasonable Compensation” Actually Means

Reasonable compensation is the pay an unrelated, arm’s-length employer would give for the same services, in the same industry, at the same skill level. The phrase comes straight from the tax code. IRC § 162(a)(1) lets a business deduct “a reasonable allowance for salaries or other compensation for personal services actually rendered.” The word reasonable is the hinge the whole rule turns on.

The rule exists to stop owners from gaming the difference between how salary and other money are taxed. Salary is deductible to the business and taxable to the worker, but it also carries payroll tax. Dividends are not deductible to a C-corporation and are taxed again to the shareholder. Distributions from an S-corporation skip payroll tax entirely. So owners face a constant temptation to mislabel money, and the IRS uses the reasonableness test to relabel it back.

Two facts decide which direction the IRS pushes. In a C-corporation, the agency wants salary to look lower, so more profit stays as a taxable, nondeductible dividend. In an S-corporation, the agency wants salary to look higher, so more money becomes payroll-taxable wages. Same legal phrase, opposite enemy. Knowing which entity you run tells you which side of the line you must defend.

A common misconception is that “reasonable” means whatever the owner decides is fair. It does not. Courts look at outside market data and company returns, not the owner’s opinion. Your next step is simple: figure out whether you are at risk for paying too much or too little, because the defense is different for each.

Which Situation Applies to You?

The right defense depends entirely on your entity and your pattern of pay. Use the branches below to find the section that fits you, then read that part closely.

• You run a C-corporation and take a large salary, with little or no dividend. Your risk is excessive compensation. The IRS will try to recast part of your salary as a dividend. Focus on the C-corporation example and the “independent investor” test.
• You run an S-corporation and take a small salary plus large distributions. Your risk is unreasonably low compensation. The IRS will recast distributions as wages. Focus on the S-corporation example and the multi-factor test.
• You run an S-corporation and take no salary at all while working full time. This is the highest-risk pattern of all. The IRS treats a zero salary with active work as an automatic red flag.
• You are a passive owner who performs little or no service. A low salary may be defensible, because pay must match services actually rendered. Keep proof of your limited role.
• You run a personal service business — law, accounting, medicine, consulting. Both entity types draw extra scrutiny, because the owner’s labor is the product, so a low salary is hard to justify.

The Two Tests the IRS and Courts Use

Courts evaluate reasonableness with one of two frameworks, and the IRS will argue whichever one helps its case. Knowing both lets you build your defense around the test a judge in your circuit is likely to apply.

The Multi-Factor Test

The multi-factor test weighs many facts about the job and the company, with no single factor controlling. It traces to Mayson Manufacturing Co. v. Commissioner, a 1949 Sixth Circuit case that listed factors still used today. The Tax Court later expanded the list, and most circuits still rely on this approach.

The core factors include the employee’s qualifications and role, the nature and scope of the work, the size and complexity of the business, a comparison with pay at similar companies, the prevailing economic conditions, and the company’s salary policy for non-owner staff. Internal consistency matters too — paying the owner ten times the next-highest employee invites questions.

The consequence of failing this test cuts both ways. For a C-corporation, a salary far above market suggests the extra is a dividend in disguise. For an S-corporation, a salary far below market suggests the distributions are disguised wages. Your next step is to gather objective comparables — industry salary surveys, Bureau of Labor Statistics data, and pay for similar roles — so your number sits inside a defensible range rather than at an extreme.

The Independent Investor Test

The independent investor test asks a single question: would a hypothetical outside investor be satisfied with the company’s return after the owner’s pay? If yes, the pay is presumed reasonable. The Seventh Circuit adopted this in Exacto Spring Corp. v. Commissioner, reasoning that a healthy return proves the owner earned the salary.

In Exacto, the company’s investors received a 20 percent return when 13 percent was expected, so the court found the CEO’s high salary reasonable and fully deductible. The logic is that a strong return leaves nothing left over to be a “disguised” dividend, because the investor is already happy.

This test mainly helps C-corporation owners defending a high salary. The misconception is that it applies everywhere — it does not. The test is binding in the Seventh Circuit and persuasive elsewhere, but many courts still use the multi-factor approach. Your next step is to check which circuit covers your state, then build your file around the test most likely to apply.

How the IRS Builds Its Case in an Audit

The IRS does not just declare a number unreasonable — it assembles evidence, and you should expect a structured attack. Understanding the playbook lets you prepare the counter-evidence in advance.

First, the examiner gathers comparables: salary surveys, pay at competing firms, and the wages of non-owner employees inside your own company. Second, the agency reviews the company’s financials — profits, distributions, dividends, and return on equity — to see whether money was mislabeled. Third, the IRS often hires a compensation expert who testifies to a “reasonable” figure, exactly as it did in the Watson case where the expert pegged reasonable pay near $91,000.

The burden of proof usually rests on the taxpayer, which is why documentation wins or loses these cases. If you have board minutes, a written compensation policy, and dated market data supporting your salary, you can rebut the examiner’s expert. If your only evidence is your own judgment, you will likely lose. Your next step is to build that file now, because you cannot create credible contemporaneous records after the audit letter arrives.

What the IRS Examines	Why It Hurts or Helps You
Industry salary surveys and competitor pay	Sets the market range; pay far outside it looks abnormal
Company return on investment after pay	A strong return defends high C-corp salary under Exacto
Distributions versus W-2 wages in an S-corp	Large distributions with tiny wages signal payroll-tax dodging
Board minutes and written pay policy	Contemporaneous records rebut the examiner’s expert
Owner’s hours, duties, and qualifications	Heavy involvement justifies higher pay; minimal work justifies low

Worked Example 1 — The S-Corp That Paid Too Little

Maria runs an S-corporation consulting firm and works full time. For tax year 2025, she paid herself a $30,000 salary and took $170,000 in distributions, so $200,000 of profit reached her with payroll tax on only $30,000. The IRS audits and, using comparables, sets reasonable compensation at $120,000.

The IRS reclassifies $90,000 of distributions as wages ($120,000 minus the $30,000 already paid). That $90,000 now carries combined Social Security and Medicare tax. The Social Security portion applies because $120,000 sits under the 2025 wage base of $176,100, so the full 15.3 percent FICA rate hits the reclassified amount.

Here is the math she can copy. The added wages of $90,000 times the 15.3 percent combined FICA rate equals $13,770 in back payroll tax. On top of that, the IRS can add a 20 percent accuracy-related penalty under IRC § 6662 — roughly $2,754 — plus interest. Across two or three open years, the same low salary can multiply the bill into the tens of thousands.

The lesson mirrors Watson v. United States, where a CPA’s $24,000 salary alongside large distributions was reset to about $91,000, and the court let the IRS collect the back employment taxes, interest, and penalties.

Worked Example 2 — The C-Corp That Paid Too Much

David owns a profitable C-corporation and paid himself a $900,000 salary in tax year 2025 while paying no dividends. The company’s return on equity was modest. The IRS argues that $400,000 of the salary is really a disguised dividend, because an independent investor would not have been satisfied with what was left.

If the IRS wins, the company loses the deduction on $400,000. At a 21 percent corporate rate, that adds $84,000 of corporate tax. The same $400,000 is then taxed again to David as a dividend, creating the classic double tax that the reasonable compensation rule is built to enforce.

Compare that to Menard, Inc. v. Commissioner, where the Tax Court called most of John Menard’s $20 million pay a dividend, but the Seventh Circuit reversed. Because Menards delivered investors a far higher return than expected, the independent investor test made the pay presumptively reasonable. David’s weak return is exactly what Menard lacked, which is why his facts are far more dangerous.

Worked Example 3 — The Zero-Salary Owner

James formed an S-corporation, worked full time running it, and paid himself no salary for tax year 2025, taking $150,000 entirely as distributions. The IRS treats a zero salary with active service as an automatic problem, because FS-2008-25 says S-corporations must treat payments for services as wages unless the owner performs no or minimal services.

The IRS sets reasonable pay at $85,000 and reclassifies that amount as wages. The Social Security portion (12.4 percent up to the wage base) plus Medicare (2.9 percent) yields 15.3 percent on $85,000, or about $13,005 in back FICA. Add the 20 percent accuracy penalty and interest, and James’s “tax-free” salary becomes his most expensive decision.

His next step, and yours if you mirror this pattern, is to put a defensible salary on the next payroll run before year-end, because the longer a zero-salary pattern continues, the larger the eventual reclassification grows.

Federal Versus State: Does Your State Follow This?

The reasonable compensation fight is mainly a federal one, but states are not bystanders. The federal exposure comes from federal income tax (the lost C-corp deduction) and federal payroll tax (the reclassified S-corp wages). Those are the dollars in most audits.

States enter through wage-based taxes. When the IRS reclassifies S-corp distributions as wages, that change often flows to state payroll systems too. A reclassification can trigger state unemployment insurance tax and, in some states, a state disability or payroll levy — California’s EDD payroll overlap is a well-known trap where one federal finding spawns a parallel state assessment.

Conformity varies, so never assume your state mirrors the federal result. Nine states have no broad personal income tax, which softens the income-tax side but not the payroll side. Your next step is to confirm how your state’s revenue or labor agency treats reclassified wages, because a federal win does not automatically settle the state column.

Mistakes to Avoid

Each error below has burned real taxpayers, and each carries a concrete cost.

• Paying an S-corp owner zero salary while working full time. This is the single biggest audit flag and invites a full wage reclassification plus penalties.
• Picking a salary with no documentation. Without comparables or minutes, you carry the burden and usually lose, because your opinion is not evidence.
• Setting S-corp salary as a fixed tiny number every year. A flat $20,000 regardless of profit looks engineered and signals payroll-tax avoidance.
• Overpaying a C-corp owner while paying no dividends. The IRS recasts the excess as a nondeductible dividend, creating corporate tax plus a second tax to the owner.
• Ignoring the company’s return on investment. A weak return guts the independent investor defense and makes high pay look like a dividend.
• Treating draws as both salary and distribution casually. Mislabeling movements of cash makes every number look unreliable to an examiner.
• Creating records after the audit letter arrives. Backdated or after-the-fact files lack credibility and can deepen penalty exposure rather than reduce it.

Do’s and Don’ts

• Do anchor your salary to dated market data, because objective comparables are the evidence that wins.
• Do document board approval and a written pay policy, because contemporaneous minutes rebut the IRS expert.
• Do match pay to the hours and duties you actually perform, because the test rewards work actually rendered.
• Do revisit the salary each year as profit changes, because a static number looks contrived.

• Do call a CPA or tax attorney when distributions dwarf salary, because the exposure spans multiple open years.

• Don’t take a zero salary while working full time, because it is the clearest signal of payroll-tax avoidance.

• Don’t rely on a round number you “feel” is fair, because feelings are not admissible comparables.
• Don’t assume your state ignores a federal reclassification, because state payroll taxes often follow.
• Don’t strip a C-corporation of all profit through salary, because the excess becomes a taxed-twice dividend.
• Don’t wait for the audit to build your file, because credible records must predate the dispute.

Pros and Cons of Aggressively Minimizing Salary

• Pro: A lower S-corp salary saves the 15.3 percent FICA on the distribution portion, real cash in good years.
• Pro: It can free working capital, because payroll tax is paid sooner than income tax.
• Pro: Within a defensible range, it is fully legal and a core reason owners elect S-corp status.
• Pro: A modest, well-documented salary can still leave room for qualified business income planning.

• Pro: It rewards owners whose income comes partly from invested capital, not just labor.

• Con: Set too low, it triggers wage reclassification, back FICA, and a 20 percent penalty.

• Con: A low salary reduces Social Security credits and retirement-plan contribution room.
• Con: It raises audit odds, because the IRS targets the low-salary, high-distribution pattern.
• Con: Penalties and interest compound across every open year, multiplying the cost.
• Con: Defending the number drains time and professional fees even when you ultimately win.

What to Do Next

Take these steps in order before your next filing deadline.

1. Identify your risk direction. Confirm whether you are a C-corp at risk of too high or an S-corp at risk of too low.
2. Pull comparables. Gather industry salary surveys and BLS wage data for your exact role and region, dated this year.
3. Set a defensible number. For active S-corp owners, current guidance often lands reasonable pay around 35 to 50 percent of net income, adjusted for facts.
4. Document the decision. Record board minutes, a written pay policy, and the data you relied on, dated before you run payroll.
5. Run it through payroll correctly. Report wages on a W-2 and the corporate return (Form 1120-S for S-corps, Form 1120 for C-corps).
6. Call a professional when numbers are large. If distributions far exceed salary or pay tops the wage base, a CPA or tax attorney is worth the fee.

This article is educational and is not a substitute for advice from a licensed CPA or tax attorney about your specific situation.

Frequently Asked Questions

Who has the burden of proving compensation is unreasonable?

The taxpayer usually carries it. Although the IRS raises the issue, you must defend your salary with comparables and records once the agency presents its evidence. Strong contemporaneous documentation can shift the practical burden back.

What law lets the IRS reclassify S-corp distributions as wages?

IRC § 7436 and § 162. Section 162 requires compensation to be reasonable, and § 7436 gives the Tax Court authority to review the IRS’s wage reclassification of an S-corporation’s payments for services.

How much salary is “reasonable” for an S-corp owner in 2025?

There is no fixed percentage. Reasonableness depends on facts, but current practitioner guidance often places active-owner pay around 35 to 50 percent of net income, anchored to market comparables for tax year 2025.

Is taking zero salary from my S-corporation legal?

No, not if you work for it. FS-2008-25 requires S-corps to pay wages for services rendered, so a zero salary with active work invites reclassification, back FICA, and penalties.

What is the independent investor test?

A single-factor reasonableness test. From Exacto Spring, it asks whether an outside investor would accept the company’s return after the owner’s pay; a strong return makes the pay presumptively reasonable.

What was the outcome in the Menard case?

The owner won on appeal. The Tax Court called most of John Menard’s $20 million pay a dividend, but the Seventh Circuit reversed, because the company’s high investor return made the salary reasonable.

What penalty applies if I lose a reasonable compensation case?

A 20 percent accuracy penalty. Under IRC § 6662, a substantial understatement of tax carries a 20 percent penalty on the underpayment, plus interest and any back payroll tax owed.

What is the 2025 Social Security wage base I should use?

$176,100 for 2025. Reclassified S-corp wages up to $176,100 carry the full 6.2 percent Social Security tax on both halves; for 2026 the base rises to $184,500.

Does the reasonable compensation rule apply to C-corporations too?

Yes, but in reverse. A C-corporation risks excessive pay, where the IRS recasts the excess as a nondeductible dividend taxed twice, instead of the too-low problem that S-corporations face.

Will my state also tax a federal wage reclassification?

Often, yes. Many states follow a federal reclassification for payroll purposes, triggering state unemployment and other wage taxes; conformity varies, so confirm with your state revenue or labor agency.

Can good documentation actually stop an audit adjustment?

Yes, frequently. Dated comparables, board minutes, and a written pay policy can rebut the IRS expert’s number and are the difference between winning and losing most reasonable compensation disputes.

What records should I keep to defend my salary?

Comparables, minutes, and pay policy. Keep dated salary surveys, board approval of compensation, a written pay policy, and records of your hours and duties, all created before any audit begins.