QBI Deduction & Your S-Corp Salary Decision

Part of WageProof's complete guide to S-corp reasonable compensation.

Your S-corp salary comes out of the profit before qualified business income is measured. Every dollar you run through payroll shrinks the base for the Section 199A deduction, up to 20% of QBI for owners who qualify.

Key Takeaways

• The One Big Beautiful Bill Act (Pub. L. 119-21) made the Section 199A deduction permanent in July 2025, at 20% of qualified business income.
• W-2 wages your S-corp pays you are not qualified business income, so below the income threshold a larger salary produces a smaller deduction.
• Past the 2026 taxable-income threshold of $201,750 (single) or $403,500 (married filing jointly), the W-2 wage limitation starts to cap the deduction against the wages your business paid, and from $276,750 (single) or $553,500 (joint) it applies in full.
• For a specified service trade or business, health, law, accounting, consulting and financial services among them, the deduction phases out completely above the threshold range, and salary cannot restore it (Section 199A(d)(3)).

What the deduction is worth

QBI is the net profit of the trade or business itself. Interest, dividends, and capital gains sit outside it (Section 199A(c)). If your S-corp generates $200,000 in QBI and you qualify, that's a $40,000 deduction on your personal return, which at a 24% marginal rate saves $9,600 in federal income tax. The income thresholds further down are measured against your taxable income rather than the company's profit, figured before this deduction is subtracted (Section 199A(e)(1)), so a spouse's salary or a heavy year of investment income can carry you past a threshold the S-corp's own numbers would have kept you under.

The deduction was originally set to expire after 2025. The One Big Beautiful Bill Act (Pub. L. 119-21, OBBBA), signed July 4, 2025, made it permanent, and the rate stayed at 20% after an earlier proposal to raise it to 23% was dropped from the final bill.

OBBBA widened the range over which the W-2 wage limitation phases in: $75,000 for single filers rather than $50,000, and $150,000 rather than $100,000 on a joint return. Section 199A(i) now sets a minimum deduction of $400 for any taxpayer with at least $1,000 of QBI from a business in which they materially participate, with the two figures adjusted for inflation after 2026. A profitable S-corp is past them both before the salary question comes up. The changes take effect for taxable years beginning after December 31, 2025 (Pub. L. 119-21, sec. 70105), which makes the 2026 return the first one that sees them.

W-2 wages are outside QBI

Take an S-corp earning $250,000 before your salary. At an $80,000 salary, QBI is $170,000 and the deduction is $34,000. At $120,000, QBI falls to $130,000 and the deduction to $26,000, an $8,000 difference worth $1,920 at a 24% rate. FICA takes 15.3% of the extra $40,000 of salary as well, roughly $6,120 more. The higher salary costs about $8,040 in this simplified example, which ignores that the employer half of the payroll tax is itself deductible by the S-corp.

The lost deduction shows up in income tax on your personal return. The $6,120 in FICA left the business across the year, paycheck by paycheck, and was already paid by the time the deduction was computed. Both numbers point the same way, toward a modest salary and a large distribution carrying no FICA, and the IRS has run compliance projects on S corporations that underpay their owner-employees since 2009.

The W-2 wage limitation

All of that assumes taxable income below the QBI thresholds. For 2026 those are $201,750 for single filers and $403,500 for married filing jointly (Rev. Proc. 2025-32, §4.26), and they are adjusted for inflation every year. Past the threshold the limitation phases in over the next $75,000 of income for single filers and $150,000 for joint filers, applying in proportion to how far into that stretch taxable income sits, so an owner in the middle of it carries part of the cap and has to run the return at actual numbers to find out how much. From $276,750 and $553,500 up it applies in full, and the deduction cannot exceed the greater of the following, per Section 199A(b)(2)(B):

• 50% of the W-2 wages the business paid, or
• 25% of those wages plus 2.5% of the unadjusted basis immediately after acquisition (UBIA) of qualified property

The second test only does anything for a business that owns depreciable property, so a service S-corp with nothing on the depreciation schedule is measured on the 50% wage test alone, and with no payroll at all that cap is zero whatever the QBI number is.

The wages counted against the cap are the ones actually paid and reported on a W-2 during the year (Section 199A(b)(4)), so for a calendar-year S-corp the December payroll run is the last chance to change the number the limitation is measured against. A year-end bonus run through payroll counts toward the cap, while the same money taken as a distribution leaves it where it was.

A second rule runs on the same thresholds. If the business is a specified service trade or business, the deduction itself phases out across that same range and reaches zero above it (Section 199A(d)(3), widened from $50,000 and $100,000 by OBBBA along with the wage-limitation range). Section 199A(d)(2) puts health, law, accounting, consulting, athletics and financial services in that category, together with any business whose principal asset is the reputation or skill of its employees or owners, a phrase the regulations limit to income from endorsements, from licensing a person's name or likeness, and from appearances (Treas. Reg. §1.199A-5(b)(2)(xiv)). For a consultant past the top of the range there is no Section 199A deduction left to protect, so the salary decision runs on FICA and on what the work is worth on the market.

Above $553,500 of taxable income on a joint return, where the wage limitation applies in full, the wage cap decides the deduction. Take an owner whose household income puts taxable income above that line, with $400,000 in QBI and a $60,000 salary: the 20% calculation gives an $80,000 deduction, but 50% of $60,000 in wages caps it at $30,000. Raise the salary to $120,000 and the cap rises to $60,000. The extra wages trim QBI to $340,000, which brings the tentative deduction down to $68,000. The wage cap still binds, and the allowed deduction goes from $30,000 to $60,000. In that example the salary that maximizes the deduction depends on where taxable income lands relative to $553,500 and on what the extra wages cost in FICA. The IRS does not ask either question. It asks whether the salary matches the work, which is why a fixed share of profit does not hold up.

Order of operations

Start with market data. The salary the IRS expects reflects the market value of your services, so match your actual duties to comparable occupations in BLS data. The reasonable salary calculator shows how WageProof prices each duty against that data. Experience and hours worked move the number from there, as does where you work, and The Nine IRS Factors covers the rest of what an examiner weighs.

With a range in hand, say $85,000 to $115,000, have your CPA run the QBI numbers at several points inside it against your whole tax picture, including FICA, income tax, the deduction itself, and any state rules that apply.

Your duties and your experience decide where in the range you land, along with how the business performed against comparable ones. If the analysis supports both $90,000 and $105,000 and the QBI math favors $90,000, taking $90,000 is defensible. Set the figure in the tax software first and the market analysis turns into a document written to fit it. An analysis dated after the salary was set, landing on the exact figure the software liked, reads as reverse-engineered whatever the market data inside it says, and "the use of a formula to determine compensation" is one of the nine factors FS-2008-25 lists.

The inputs change every year

The owner of that $250,000 S-corp hires an operations manager and stops doing the scheduling. The salary now has to be matched against a different mix of occupations, and a year in which revenue rose or fell sharply changes the size and complexity of the business the factors weigh.

The thresholds are indexed, so the line moves every year (2026's $201,750 and $403,500 are higher than 2025's), and an owner whose income sits near it can land on either side from one year to the next without the business changing. BLS publishes new wage estimates every year as well, which is why an analysis built on 2025 data should not be used to justify a 2027 salary without adjustment. A new Social Security wage base applies each year, marking the point where the 12.4% Social Security portion of FICA stops and only the 2.9% for Medicare continues, so where a salary sits against that line changes what the next dollar of payroll costs. If you use WageProof, each report is tied to a specific tax year and uses the BLS release for that tax year (for a tax year newer than the latest release, the latest release projected forward with the Employment Cost Index), and each year's rerun is a new report at the price on the pricing page.

What your CPA needs from you

Your CPA can only model the numbers you hand over. The reasonable compensation analysis is the piece to send first, and WageProof produces that report with the BLS data citations and the methodology written out alongside a salary figure tied to comparable market rates. Estimated net income and expected distributions go with it, along with anything material that changed since last year, a new hire or a contract that ended, either of which moves the profit the QBI calculation runs on.

Prior years matter as much as this one. What you paid yourself and what you took in distributions set the reference point your CPA works from, and a salary that jumped or dropped sharply against last year's distributions needs a reason in the file, put there in the year it happened while the facts are still at hand.

You can run a reasonable compensation report in about 15 minutes. It gives you and your CPA a documented starting point built on public BLS wage data an IRS examiner can check, dated before you set the salary.