Methodology

Under 26 U.S.C. § 162(a)(1), businesses may deduct “a reasonable allowance for salaries or other compensation for personal services actually rendered.” For S-corporation owner-employees, this provision requires that compensation reflect the fair market value of the services the owner actually performs for the business.

S-corporations pass through income to shareholders, who pay income tax but not self-employment tax on distributions. The IRS requires that owner-employees pay themselves reasonable compensation as W-2 wages — subject to FICA and Medicare taxes — before taking distributions. When compensation is set unreasonably low, the IRS may reclassify distributions as wages, assess back payroll taxes, and impose penalties and interest.

There is no statutory formula for “reasonable.” The determination is inherently factual, based on the nature of the services performed, the owner’s qualifications, and comparable market data. The IRS and the Tax Court have established analytical frameworks for this determination, which this tool implements using publicly available wage data.

IRS Fact Sheet FS-2008-25 identifies nine factors for evaluating reasonable compensation. No single factor is determinative; the IRS weighs them together based on the facts and circumstances of each case.

The Cost Approach decomposes the owner’s role into the specific business functions performed and prices each function independently using BLS wage data at the appropriate skill level and geographic location. The IRS Job Aid refers to this as the “Replacement Cost” method: the cost to replace the owner’s services by hiring separate individuals to perform each function.

This approach is particularly applicable to small S-corporation owners who perform multiple business functions. Most small business owners divide their time across administrative, operational, financial, and specialized tasks — no single occupation classification captures the full scope of their work. The Cost Approach accounts for this by valuing each function at its own market rate rather than forcing a single job title onto a multi-function role.

The Market Approach compares the owner’s overall position to a single comparable occupation in their geographic area. Rather than decomposing the role into tasks, it identifies the primary occupation that best describes the owner’s function and applies the BLS wage for that occupation at the owner’s experience level.

This approach typically produces a higher compensation figure than the Cost Approach because it values the owner as a single professional role rather than a weighted mix of functions that includes lower-wage operational tasks. Including both approaches provides a defensible range: the Cost Approach represents the replacement cost of the owner’s actual work mix, while the Market Approach represents what a single comparable professional would earn.

The IRS Job Aid notes that “the reconciliation in the case of Reasonable Compensation will generally rest heavily on the market approach.” This tool generates both approaches so that the owner and their tax professional can evaluate the full range and select the figure most appropriate to their circumstances.

The Income Approach asks whether a hypothetical independent investor would consider the owner’s compensation reasonable given the return generated by the business. Rather than pricing the owner’s labor directly, it works backward from business performance: if the company’s return on equity exceeds what an outside investor would expect, the owner’s salary may be too low.

The key precedent is Exacto Spring Corp v. Commissioner(196 F.3d 833, 7th Cir. 1999), in which the Seventh Circuit held that the relevant question is whether “an independent investor would be willing to compensate the employee as he was compensated.” The court reasoned that if the company still delivers an adequate return to shareholders after the owner’s salary, the salary is presumptively reasonable.

This approach is most useful when comparable wage data is unavailable for the owner’s role, or when the owner drives outsized returns that are not fully captured by labor-market comparisons. It provides a complementary data point alongside the Cost and Market Approaches.

This mapping anchors the wage percentile to a documentable, verifiable fact — years of experience performing that specific function — rather than a subjective self-assessment of skill level. “I have 4 years of bookkeeping experience” is more readily substantiated than “I am an average bookkeeper.”

The proficiency level is set independently for each task. An owner might have 15+ years of experience in their core professional function (Expert, 90th percentile) while having only 2 years of experience managing employees (Developing, 25th percentile). The Cost Approach captures this nuance.

Note: The experience-year thresholds defining each level are informed judgments designed to provide reasonable anchors, not empirically derived cutoffs. They are intended to produce a more documentable basis for percentile selection than subjective self-assessment.

Percentile suppression:In rare cases, the BLS suppresses individual wage percentiles when the survey sample size is insufficient to produce a reliable estimate, even when data exists for the same occupation at other percentiles. When the percentile mapped to the owner’s proficiency level is suppressed, the median (50th percentile) wage is used as a substitute. This substitution is documented in the report’s Data Substitutions section for each affected task.

Annual hours are capped at 2,080 — the standard full-time equivalent of 40 hours per week for 52 weeks. This is consistent with how BLS wage data is structured and how the Tax Court has applied hours in reasonable compensation analyses.

In Sean McAlary Ltd. v. Commissioner(T.C. Summary Opinion 2013-62), the Tax Court calculated reasonable compensation at $40/hour for a 2,080-hour work year — despite the shareholder regularly working in excess of 70 hours per week. Hours beyond 2,080 did not increase the compensation figure.

Owners who work fewer than 2,080 hours annually may enter their actual hours. Compensation scales proportionally: an owner working 1,040 hours (half-time) would receive approximately half the full-time compensation figure, as each task’s hours allocation is reduced accordingly.

BLS OES wage data is collected annually in May and published approximately 10 months later. For reports covering tax years after the survey date, a data currency adjustment is applied to account for wage growth in the intervening period.

The adjustment uses the Bureau of Labor Statistics Employment Cost Index (ECI), specifically the 12-month percent change for wages and salaries, private industry workers (BLS Series CIU2020000000000I, not seasonally adjusted). The ECI measures actual changes in employer labor costs and is the standard index for projecting wage survey data forward.

This methodology is described by the Bureau of Labor Statistics in “Aging Wage Survey Data Using the Employment Cost Index” (Monthly Labor Review) and is standard practice in compensation analysis.

This tool implements all three valuation approaches described in the IRS Job Aid: Cost, Market, and Income. The Income Approach (Independent Investor Test) is available exclusively for CPA accounts and considers the company’s financial performance via Fair Market Value data (see Section 05).

The following factors relevant to reasonable compensation are outside the scope of this tool and should be evaluated by the owner’s tax professional: