QBI Deduction Guide
QBI Deduction 2026: Section 199A, S-Corp Salary, and the W-2 Wage Limit
The §199A qualified business income deduction is worth up to 20% of business profit. In 2026 the rules tighten above $201,750 single and $403,500 joint, and for S-Corp owners above those numbers, your salary stops being just a payroll-tax variable. It becomes the lever that decides how much of the deduction you actually keep.
Picture a software consultant filing jointly with $500,000 of profit running through her S-Corp. She wants to know what salary minimizes her tax bill. Most calculators answer that by minimizing payroll tax. They miss the bigger lever sitting inside IRC §199A. The right salary for this owner is not the smallest reasonable wage that survives an IRS audit. It is the salary that maximizes her qualified business income deduction. The owner above is theoretical, not an actual EntityIQ client.
What the QBI deduction does
§199A lets owners of S-Corps, partnerships, and sole proprietorships deduct up to 20% of their qualified business income, plus 20% of qualified REIT dividends and publicly traded partnership income. C-Corp shareholders get nothing here. The deduction sits below the line, after AGI, but does not reduce self-employment tax, payroll tax, or the 3.8% net investment income tax under §1411. It only reduces income tax.
The One Big Beautiful Bill Act, signed in July 2025, made §199A permanent. The original TCJA version was set to sunset on December 31, 2025, and the new statute eliminates that cliff. OBBBA also raised the phase-in ranges starting in 2026 and added a $400 minimum deduction for active owners with at least $1,000 of QBI.
The 2026 thresholds that change everything
Revenue Procedure 2025-32 set the 2026 §199A taxable-income thresholds at $201,750 for single filers and $403,500 for joint filers. Below those numbers, every passthrough owner gets a clean 20% deduction on QBI with no extra limits, including specified service trade or business owners. Above the threshold, two limits start to phase in. The phase-in ranges, raised by the One Big Beautiful Bill Act, are now $75,000 for single filers and $150,000 for joint filers, so the limits are fully phased in at $276,750 single and $553,500 joint.
Single Filer (2026)
Phase-in window
Joint Filer (2026)
Phase-in window
The W-2 wage limit, in plain English
Above the threshold, the deduction is capped at the greater of 50% of the W-2 wages paid by the business, or 25% of W-2 wages plus 2.5% of the unadjusted basis immediately after acquisition of qualified property, per §199A(b)(2). For a service business with no real property, only the first piece matters. That single rule is why your S-Corp salary affects more than just payroll tax. Lower salary means more QBI but a tighter W-2 wage cap. Higher salary means more payroll tax and less QBI, but a looser cap.
The salary math, with a 2026 example
Take a non-SSTB owner filing jointly, $500,000 net profit, taxable income comfortably above the $553,500 cutoff. If she pays herself a $100,000 salary, QBI is $400,000 and 20% of that is $80,000. But 50% of her wages is only $50,000, so her deduction is capped at $50,000. If she pays a $200,000 salary instead, QBI drops to $300,000, 20% of that is $60,000, and 50% of wages is $100,000. The cap stops biting, but QBI itself has shrunk.
Salary too low
$100,000 salary
Salary at 2/7 of profit
$142,857 salary
Salary too high
$200,000 salary
The optimum sits where 20% of QBI equals 50% of wages. A little algebra gives a clean rule: wages = profit × 2/7. For $500,000 of profit, that is roughly $142,857 of salary, producing about $71,429 of QBI deduction. At a 32% marginal bracket, the extra $21,429 of deduction above the $50,000 cap is worth about $6,857 in federal income tax saved, more than the additional employer-side payroll tax on the higher wage. That trade is the part most boilerplate S-Corp calculators ignore.
Specified service trades and businesses
§199A(d)(2) lists the trades that lose the deduction at the top of the phase-out: health, law, accounting, actuarial science, performing arts, consulting, athletics, financial services, brokerage services, investing and investment management, trading, and dealing in securities. The statute also captures any trade or business where the principal asset is the reputation or skill of one or more employees, which Treas. Reg. §1.199A-5(b)(2)(xiv) narrows to endorsement fees, license deals, and appearance income. Engineering and architecture were carved out of the list at the original drafting, which is why they keep their full QBI deduction at any income level.
An SSTB owner whose taxable income sits inside the phase-in range gets a pro-rata fraction of the deduction. An SSTB owner above the full phase-out gets zero, full stop. That changes the entity decision for a one-person consultancy with a high-earning spouse. If joint taxable income runs past $553,500, the deduction has disappeared anyway, so the QBI lever no longer pulls, and the S-Corp election is once again about payroll-tax math alone.
The new $400 minimum deduction
For tax years beginning after December 31, 2025, OBBBA added a minimum QBI deduction of $400 if the taxpayer has at least $1,000 of QBI from one or more qualified trades in which they materially participate. Both numbers are indexed for inflation for tax years beginning after 2026. The floor is small in dollar terms, but it pulls the very smallest active businesses, the part-time side gigs and brand-new consultancies, into the deduction even when their math would otherwise round to zero.
What this means for your S-Corp election
Two pieces. First, if your projected 2026 taxable income lands below $201,750 single or $403,500 joint, none of the W-2 wage limits, SSTB exclusions, or salary tradeoffs apply. You get 20% of QBI clean, no matter how low you set your S-Corp salary. Second, if you are above the phase-out and not in an SSTB, your reasonable salary is a tax-planning variable, not just a compliance number. Setting it at the wage-base minimum can leave a five-figure QBI deduction on the table.
The EntityIQ S-Corp calculator factors in your filing status, projected taxable income, SSTB classification, and the W-2 wage limit before recommending a salary. If you want to see how the entity choice itself shifts QBI, see our S-Corp vs LLC vs partnership vs C-Corp comparison. For the mechanics of electing S-Corp status, see our guides on the S-Corp election deadline and how to file Form 2553.
This article is educational and is not legal or tax advice. The numbers above are 2026 figures, and the owner is theoretical. Please consult a qualified CPA before making a §199A planning decision.