S-corp reasonable salary: what the IRS actually looks at
There is no official percentage. What actually exists is a multi-factor test built from decades of Tax Court rulings — here's what it actually weighs, with the case law behind it.
The '60/40 rule' does not exist
It shows up constantly in small-business tax advice: pay yourself 60% of profit as salary, take the remaining 40% as distributions, and you're safe. No IRS publication, revenue ruling, or Tax Court decision sets that split, or any fixed percentage split, as the standard. The origin appears to be informal practitioner shorthand that calcified into received wisdom through repetition, not through any actual ruling adopting it. Following it doesn't create protection from an IRS challenge, and a salary set purely to hit 60% — with no connection to the actual role's duties or market rate — can still be successfully challenged as unreasonable in either direction.
Why this matters: the payroll tax at stake
A shareholder-employee paying themselves $20,000 in salary and taking $180,000 in distributions from a $200,000-profit S-corp, when the role clearly justifies a six-figure salary, is the exact pattern reasonable-compensation enforcement exists to catch — not a clever structure, a visible one.
The real factors, from actual case law
Courts, including in the frequently cited Mayo v. United States and Watson v. Commissioner decisions, have converged on a consistent multi-factor approach rather than any single formula.
No single factor is dispositive on its own — a court weighs them together, and a weak showing on one (say, modest formal training) can be offset by a strong showing on another (years of directly relevant experience, or clearly documented comparable pay).
Training and experience
This covers formal credentials (a license, a degree, a certification directly relevant to the role) and informal experience (years actually doing this kind of work, whether as an employee elsewhere or running this business). A licensed specialist performing licensed work supports a higher reasonable salary than an owner performing largely administrative tasks in the same industry, even at identical profit levels — the role, not the profit, is what this factor measures.
Duties and responsibilities
What the shareholder-employee actually does matters more than their title. An owner who personally performs the company's billable work (consulting, treating patients, doing the accounting) is functioning as the primary employee, which supports a salary closer to what it would cost to hire someone to do that work — not a token figure. An owner in a largely supervisory or strategic role, with staff doing most of the operational work, has a different, often lower, reasonable-salary profile for the same reason a company's highest-paid employee isn't always its owner.
Time and effort devoted
A full-time owner-operator and a part-time owner running the business alongside another job face genuinely different reasonable-salary questions, even in identical roles. Documenting actual hours — not just an assumed 40-hour week — is part of building a defensible position, particularly for owners who split time across multiple ventures or who scaled back involvement as the business matured and hired staff to take over day-to-day duties.
Comparable salary data
What would it cost to hire someone else to do this job, in this industry, in this region? Sources include the Bureau of Labor Statistics' Occupational Employment and Wage Statistics, industry salary surveys, and, for higher-stakes situations, a formal third-party compensation study. A figure sourced from actual comparable data, even informally gathered and documented, carries far more weight in an examination than a number picked because it felt reasonable or matched a round percentage of profit.
Documenting the decision
A brief memo covering the role’s duties, hours, relevant comparable pay, and why the chosen salary reflects them is worth more in an examination than a defensible number with no paper trail behind it.
As the business and the owner’s role change, last year’s reasonable salary may no longer be this year’s — a static figure carried forward for years without review is itself a weak spot.
BLS wage data, a job posting for a similar role, or a formal compensation study — whatever the source, save it alongside the salary decision, not just the conclusion.
A salary that happens to be some clean fraction of profit, with no connection to the role itself, is a pattern examiners specifically recognize — the factors above, not a formula, are what should drive the number.
Build a defensible starting figure with the S-corp reasonable salary calculator — it walks through the same factors covered here and estimates the payroll tax exposure of getting the number wrong in either direction.
Frequently asked questions
No. The commonly repeated "60% salary, 40% distribution" split has no basis in the tax code, IRS guidance, or any court ruling — it's a rule of thumb some advisors use as a rough starting point, not a safe harbor. The IRS and the Tax Court instead apply a multi-factor test built from actual case law, covering training, duties, time devoted, and comparable pay in the same role and industry.
It can reclassify some of the distributions as wages, retroactively — triggering back payroll taxes (both the employer and employee shares of Social Security and Medicare), penalties for late payroll tax deposits, and interest running from when the wages should have been paid. The corporation, not just the shareholder, can be held liable for the payroll tax side of the adjustment.
Not always — a formal, third-party study is more common for higher-profit S-corps or ones expecting IRS scrutiny, but every S-corp shareholder-employee should document their own reasoning even informally: the role's duties, hours, relevant comparable salary data, and why the chosen figure reflects it. A one-page memo with sourced comparables is far better documentation than nothing, at a fraction of the cost of a formal study.
Yes, and it often should — as the business grows, the owner's role typically expands (more revenue responsibility, more staff managed, more strategic decisions), which generally supports a higher reasonable salary over time. A first-year S-corp with a part-time owner-operator and a five-year-old S-corp with a full-time owner running a team are different reasonable-salary questions, even for the same person.
Neither extreme is safe, but the tax exposure is asymmetric. An unreasonably low salary shifts profit into distributions to dodge payroll tax — exactly what IRS reasonable-compensation enforcement targets, with real penalty and back-tax exposure. An unreasonably high salary mainly costs the owner some unnecessary payroll tax in the current year, a smaller and less risky error. When genuinely unsure, erring toward the higher end of a defensible range costs less than erring low.
Glossary:Reasonable Compensation