Every one of these six free AI reasonable salary calculators will hand you a specific dollar number in under two minutes. None of them will show up to your audit.

That distinction matters because the stakes on an S-corp reasonable-compensation call are not trivial. If the IRS reclassifies distributions as wages, the exposure is back payroll tax at the combined 15.3% FICA rate, a commonly-cited 20% accuracy-related penalty, and interest running from the original filing date. The Treasury Inspector General for Tax Administration has reportedly flagged S-corp reasonable compensation as an enforcement priority, and the IRS is reportedly leaning more on data analytics to flag officer-compensation outliers — both worth taking seriously, though neither claim comes with a public enforcement number precise enough to cite as fact.

The quick answer: all six calculators tested here are free, built on real Bureau of Labor Statistics wage data, and genuinely useful for the “comparable wages to similarly positioned officers” factor — which is one of nine factors the IRS actually weighs. None of them touch the other eight. Treat any of these six as a sanity check on a number a CPA is already building, not as the filed position itself. The more aggressive the salary-to-distribution ratio, the less a free tool alone should be making that call.

This is one piece of a bigger self-employed tax-prep puzzle — right alongside decisions like how self-employed filers compare tax software — but it’s the one with the highest dollar stakes if you get it wrong.

What the IRS actually means by “reasonable compensation” (it’s not a formula)

The IRS’s own guidance on S-corp officer compensation, published as Fact Sheet FS-2008-25 and echoed on the S-corporation officer compensation page at IRS.gov, is explicit that reasonable compensation is a facts-and-circumstances determination, not a calculation. There is no published percentage, no safe-harbor ratio, and no formula an agent applies at intake.

Fact Sheet FS-2008-25 lists factors courts have historically used to test reasonableness. In practice, tax professionals distill these into roughly nine considerations:

• Training and experience of the officer
• Duties and responsibilities actually performed
• Time and effort devoted to the business
• Dividend history (has the corporation historically paid dividends, and how much)
• Payments to non-shareholder employees for comparable work
• Timing and manner of paying bonuses to key people
• What comparable businesses pay for similar services
• Compensation agreements, if any
• The formula used to determine compensation, if a formula is used

“Comparable wages” — the one factor every AI calculator in this piece addresses — is one line on that list. It is not the list. Courts that have reviewed reasonable-compensation disputes have consistently rejected attempts to reduce the analysis to a single mechanical formula, which is the exact shape of what a two-minute calculator produces.

Is the “60/40 rule” real? No — and here’s why that matters for these calculators

The “60/40 rule” — the idea that 60% of net business income should go to salary and 40% to distributions, or some inverse of it — circulates constantly in S-corp owner forums and on tax-prep blogs. It has no basis in the tax code, no IRS endorsement, and no safe-harbor status. Courts reviewing reasonable-compensation cases have specifically declined to adopt a fixed percentage test, because the underlying statute and case law point to the nine-factor analysis above, not a ratio.

That matters directly for two of the six tools reviewed here. Jupid’s own copy states that compensation below 40% of net business income “generally draws IRS scrutiny.” Taxstra frames 40-60% of profit as “commonly defensible.” Both are practitioner heuristics — reasonable enough as a rough gut-check, built from experience watching what tends to get flagged — but they are being presented in language that reads like an official threshold, and no such threshold exists.

One thread on r/tax addressed this directly: “There truly are no specific guidelines” on reasonable compensation, a poster wrote, adding that “percentages of net income are also not the place to start” when setting a salary figure. That is the correct read of the IRS’s own published position. A percentage-of-profit heuristic might correlate with outcomes practitioners have seen, but it is not the standard an auditor or a court applies.

David E. Watson, P.C. v. United States: what actually happened, and what it would cost you today

The reasonable-compensation case most often cited in this space is frequently misnamed online as “Watson v. Commissioner.” The correct citation is David E. Watson, P.C. v. United States, 668 F.3d 1008 (8th Cir. 2012) — a refund suit against the government, not a Tax Court case against the Commissioner.

The facts: David Watson, a CPA working through his own professional corporation, took a $24,000 annual salary in 2002 and 2003 while the corporation distributed $203,651 to him in 2002 and $175,470 in 2003. The government’s expert witness used AICPA Management of an Accounting Practice (MAP) survey data — actual compensation data for CPAs with comparable experience and role — to establish a reasonable wage of $91,044 per year. The Eighth Circuit affirmed reclassifying roughly $69,000 per year of the distributions as wages, subject to employment tax.

The case did not turn on a percentage of profit, a BLS wage lookup, or a two-minute questionnaire. It turned on an expert compensation study anchored to survey data specific to Watson’s profession, experience level, and role — a level of documentation none of the six calculators reviewed here attempt to produce. This piece will not cite a specific total dollar penalty for Watson beyond noting the standard exposure structure: back FICA at the combined 15.3% rate on the reclassified amount, a commonly-cited 20% accuracy-related penalty, and interest.

Can the IRS actually audit your S-corp salary — and how often?

The honest picture here is low probability, high consequence — and it is worth being precise about which parts of that claim are confirmed and which are secondary reporting.

Secondary summaries of TIGTA findings, circulated by outlets including Tax Notes and the procedural-tax blog ProcedurallyTaxing, have put the share of S-corps specifically examined for payroll-tax reasonable-compensation issues at reportedly under 1%. Those same secondary summaries have cited an estimated $24 billion to $25 billion in unreported employment tax tied to reasonable-compensation underpayment across 2016 through 2018 — an approximate, aggregate figure from secondary reporting on the underlying TIGTA report, not a per-filer statistic.

Community discussion tracks with that low-frequency picture. One tax professional on r/taxpros wrote that “the IRS has been banging on this since 2004” but added, of their own client base, “I haven’t had one ever” get audited specifically on reasonable compensation. A separate thread on r/enrolledagent rated the practical audit risk around “7 out of 10” for severity if it does happen — citing FICA tax penalties that “can be 100%” in the worst outcomes — while noting in the same breath that “the IRS is inefficient” at actually catching it.

Put together: getting flagged specifically for a reasonable-compensation issue is uncommon. If it happens, the downside is not proportional to how rare it is.

How we compared six AI reasonable salary calculators

This comparison ran three composite owner profiles — built to mirror patterns that show up repeatedly in r/tax threads — through each of the six free calculators and recorded what each tool asked, and what it output.

• Profile 1: a solo, largely automated digital or small gaming business, roughly 5-10 hours a week of active owner time, net profit around $120,000-$140,000.
• Profile 2: a full-time solo professional-services owner (consulting, accounting, law-adjacent work) netting around $300,000 — a modern stand-in for the Watson fact pattern.
• Profile 3: a mostly passive, largely delegated owner working 5-10 hours a week, moderate profit.

Each tool was scored on five factors: does it ask about actual duties beyond hours worked; does it account for dividend/distribution history or ask for documentation; does it output a range or a single misleadingly precise figure; does it cite a wage-data source down to a BLS occupational code or geography; and does it disclose that it is not a substitute for professional review.

This is a structured comparison of inputs, outputs, and factor coverage against the IRS’s published nine-factor standard — not a claim that any tool’s backend calculation was independently verified for accuracy. None of these calculators were run against an actual audit outcome; the test measures how closely each tool’s questionnaire maps to what an auditor or court would actually ask, not whether its number would hold up in a real exam.

The six calculators at a glance

Figures reflect each tool’s public site as reviewed for this piece; pricing and feature copy can change without notice.

Individual tool deep-dives

Otto AI

Otto’s strength is framing the output as a percentile within BLS OEWS data for a chosen role, rather than a single manufactured number — it is part of a broader gig-worker tax product suite, not a standalone gimmick. The gap: choosing which percentile to target is itself a judgment call the tool hands back to the owner without resolving, and it still does not touch dividend history or documented duties, the factors that actually distinguish a defensible number from an arbitrary one.

AI Tax Accountant

The strength here is speed — a role-and-state lookup against BLS OES data in about 90 seconds, useful as an initial gut-check before deeper work. The gap is the same thing that makes it fast: a two-field input skips the officer’s actual duties entirely, which is the factor courts and the IRS weigh most heavily.

Jupid

Jupid’s strength is that it frames the question the way owners actually ask it on r/tax — not “what does a comparable employee earn” but “how do I split this profit efficiently.” The gap is the 40%-floor framing: presenting a below-40% salary as something that “generally draws IRS scrutiny” restates the debunked 60/40 heuristic as though it were closer to an official threshold than it is.

X1 Wealth

The strength is a range output paired with an estimated tax-savings figure, aimed at higher earners weighing whether a formal planning relationship is worth it. The gap is structural: the free calculator’s purpose is to generate a lead into X1’s paid AI-driven family-office product for owners in the roughly $150,000-$2 million-plus range, not to stand alone as the final analysis.

myscorpsalary.com

Its strength is answering a question the other five skip — whether the filer should even elect S-corp status in the first place, using a break-even heuristic around $75,000-$80,000 in profit before the S-corp election typically pays for itself in tax savings. The gap is that once past that threshold, the salary figure it produces comes from filing status and hours worked, not documented duties or comparable-wage data specific to the role.

Taxstra

Taxstra is the strongest of the six on structure — CPA-authored by Bryan Martin, and explicitly organized around the IRS’s nine factors plus three valuation approaches (income, market, and cost), which is closer to how a professional compensation study is actually built. The gap is that its own marketing language still describes 40-60% of profit as “commonly defensible,” reintroducing the percentage-of-profit framing that neither the IRS nor the courts have adopted as a rule.

Our take: use one of these as a sanity check, never as your sole audit defense

Documentation wins reasonable-compensation audits, not a clean output number. A single figure from a free calculator, unsupported by anything in the file explaining how it was reached, is not meaningfully different from a number picked out of the air — to an auditor, both arrive with the same lack of a paper trail.

One enrolled agent on r/enrolledagent described a case that illustrates the gap directly: an auditor demanded a salary of $80,000 with no explainable methodology behind the figure, against a client who had actually been paying $40,000. The absence of documented reasoning on either side — the client’s original number or the auditor’s counter-number — is exactly the failure mode a free calculator, used alone, leaves an owner exposed to.

The workable process: run two or three of these six calculators and check whether the ranges roughly agree. If they cluster, that is a useful sanity check on the general zone. Then document the actual work — hours, duties, and distribution timing, ideally logged continuously through bookkeeping tools that track the paper trail an audit actually checks rather than reconstructed after the fact — plus the r/tax framing that cuts through the noise better than any tool: what would it cost to pay someone else to do every aspect of this job, for another company, at arm’s length. That answer, documented in the file with the reasoning behind it, is what an auditor is actually testing for.

For an owner running an aggressive salary-to-distribution ratio, or sitting on high profit where the reclassification exposure is largest, a free calculator is not the last stop. A paid Reasonable Compensation Report, from a service like RCReports, runs roughly $400 to $1,200 per its own pricing page and produces the kind of documented, methodology-backed study that actually held up in cases like Watson. A widely upvoted comment on r/tax put the underlying caution plainly: “do not trust ChatGPT on taxes.” That same skepticism shapes how this channel evaluates AI-assisted tax prep tools for self-employed filers more broadly — AI is fine at mechanical prep work, not at judgment calls with five- and six-figure consequences.

Frequently asked questions

What is a reasonable salary for an S-corp owner in 2026?

There is no fixed number or percentage — the IRS evaluates reasonable compensation through a nine-factor facts-and-circumstances test covering training, duties, time devoted, dividend history, and comparable pay, among others. Any dollar range a calculator or blog post cites is, at best, a rough directional estimate from secondary sources, not an IRS-published figure. That number also does double duty beyond audit exposure — it’s the figure that determines how your salary number affects Solo 401(k) contribution limits, so a lowball salary picked purely to minimize FICA can quietly cap retirement contributions too.

Can the IRS audit my S-corp salary and how often?

Yes, the IRS can and does examine S-corp officer compensation. Secondary summaries of TIGTA reporting put the share of S-corps specifically examined for this issue at reportedly under 1%, making it a low-probability event — but one with high consequences (back FICA, penalties, and interest) if it happens.

Are free AI reasonable-comp calculators accurate enough to survive an audit?

They function as a first-pass check on the “comparable wages” factor — one of nine the IRS weighs — using real BLS wage data. None of the six reviewed here produce the documented duties analysis, dividend-history review, or valuation methodology an audit actually tests. Treat the output as a sanity check, not a filed position.

Is the 60/40 rule a real IRS rule or a myth?

It is a myth. The IRS has never published a percentage-based safe harbor for salary versus distribution, and courts reviewing reasonable-compensation disputes have specifically rejected mechanical percentage formulas in favor of the facts-and-circumstances test.

What happened in David E. Watson, P.C. v. United States and what would reclassification cost me?

Often miscited as “Watson v. Commissioner,” the actual case involved a CPA who took a $24,000 salary against distributions of $203,651 (2002) and $175,470 (2003). A government expert, using AICPA survey data, set a reasonable wage at $91,044; the Eighth Circuit affirmed reclassifying roughly $69,000 per year as wages. The exposure structure for a reclassification like that is back FICA at the combined 15.3% rate, a commonly-cited 20% accuracy-related penalty, and interest — this piece does not cite a specific total dollar figure for Watson’s case.

The bottom line for S-corp owners setting salary this year

All six calculators reviewed here are real, free, and built on legitimate BLS wage data — genuinely useful for a first-pass check on the comparable-wages factor. None of them, alone, would have survived the level of scrutiny applied in Watson. That case turned on an expert study tied to survey data specific to the owner’s role and experience, not a two-minute questionnaire.

The practical move: run two or three of these tools, compare where the ranges land, then document actual duties, hours, and the reasoning behind the final number before filing. If the salary-to-distribution ratio looks aggressive or profit is high, a paid Reasonable Compensation Report is cheaper than an audit.

A free calculator can tell you a number. It can’t testify for you.