S-Corp QBI Deduction 2026: What Section 199A Means
The One Big Beautiful Bill Act didn’t just extend the Section 199A qualified business income deduction — it made the 20% QBI deduction permanent, with no sunset date left on the books. For 2026, the income thresholds where the wage limitation kicks in rose to $201,750 for single filers and $403,500 for joint filers, under Rev. Proc. 2025-32. See our complete OBBBA guide for S-corp owners for the rest of what changed. For S-corp owners specifically, this deduction isn’t a box you check once and forget. The reasonable salary you pay yourself as a W-2 employee reduces your qualified business income dollar for dollar, and once your income crosses the threshold, that same salary is what decides whether you collect the full 20% deduction or a fraction of it.
How the 20% QBI deduction actually works
Section 199A allows a deduction equal to the lesser of your combined qualified business income amount or 20% of your taxable income minus net capital gain. Below the 2026 threshold, the math is simple. If your taxable income doesn’t exceed $201,750 (single, head of household) or $403,500 (married filing jointly), you deduct 20% of the S-corp’s qualified business income passed through to you, full stop — no wage or property test applies. Above that threshold, the deduction for each trade or business is capped at the greater of 50% of W-2 wages paid by the business, or 25% of W-2 wages plus 2.5% of the unadjusted basis of qualified property. Most S-corp owners without significant depreciable equipment are really working with the 50%-of-wages test.
The 2026 phase-in range, and where it ends
The wage limitation doesn’t snap on all at once. Between the threshold and the threshold plus $75,000 (single) or $150,000 (joint), the limitation phases in gradually — Rev. Proc. 2025-32 puts the 2026 phase-in ceiling at $276,750 for single filers and $553,500 for joint filers. Cross that ceiling and the wage-and-property limitation applies in full. This is also the range the OBBBA widened: the phase-in band used to be $50,000/$100,000, and it’s now $75,000/$150,000, so more S-corp owners land in a partial QBI deduction instead of losing it outright.
Why the S-corp structure creates a limitation nobody else deals with
Reasonable compensation is explicitly carved out of qualified business income. Section 199A(c)(4)(A) excludes any reasonable compensation the trade or business pays to the taxpayer for services rendered. That means the salary you pay yourself as an S-corp shareholder-employee never counts as QBI — only what’s left after payroll does. A sole proprietor or a partner receiving a guaranteed payment faces a version of this too, but the S-corp is the only structure where that payment is formal W-2 wages that also feeds the wage limitation test on the other side of the equation. Set your salary too low and you invite IRS scrutiny under reasonable-compensation rules (see our guide to setting a defensible S-corp salary); set it too high and you shrink the qualified business income the 20% is computed on — in an owner-only S-corp above the threshold, the deduction is the lesser of 20% of QBI or 50% of your W-2 wages, and every extra dollar of salary cuts QBI by a full dollar while adding only 50 cents of headroom under the wage test. Below the threshold, none of this matters — the wage test doesn’t apply, so a defensible, lower reasonable salary maximizes both the deduction and your payroll tax savings.
A quick example makes this concrete. Say your S-corp nets $260,000 before your salary, you pay yourself a reasonable $110,000 salary, and you’re single with no other income. Your qualified business income is roughly $150,000 (net income minus your W-2 wages), and after the $16,100 standard deduction for 2026 your taxable income lands near $244,000 — above the $201,750 threshold but under the $276,750 phase-in ceiling, so the wage limitation applies partially. Compare that to paying yourself $85,000 instead: QBI rises to about $175,000, but the wage base the limitation is measured against shrinks along with the salary — while your taxable income barely moves, because shifting dollars between salary and pass-through income doesn’t change the total that lands on your return. Which salary produces the larger deduction depends on exactly where you land in the phase-in math, which is why this isn’t a decision to make with a rule of thumb.
New for 2026: a minimum QBI deduction floor
The OBBBA also added a provision that didn’t exist before: a guaranteed $400 minimum QBI deduction for any taxpayer with at least $1,000 of qualified business income from a trade or business in which they materially participate, effective for tax years beginning after December 31, 2025. Both the $400 and $1,000 figures are scheduled to adjust for inflation in tax years beginning after 2026. It’s a small number, but it closes off the scenario where a profitable-on-paper S-corp with thin margins nets a deduction of only a few dollars.
If your S-corp is a specified service business, the math changes entirely
Specified service trades or businesses lose the deduction entirely above the phase-in ceiling. Section 199A(d) excludes SSTBs — health, law, accounting, consulting, financial services, and similar fields — from the definition of a qualified trade or business once income clears the threshold-plus-range amount. Below the threshold, an SSTB gets the full deduction like any other business. In the phase-in range, both the income eligible for the deduction and the wage limitation shrink proportionally. Above $276,750 (single) or $553,500 (joint) in 2026, an SSTB S-corp owner gets $0 under Section 199A, regardless of wages paid. If that’s your situation, the planning conversation isn’t about optimizing the deduction — it’s about whether other levers, like retirement plan contributions or the timing of income, keep taxable income under the ceiling in the first place.
What this means for your 2026 planning
The QBI deduction is now a permanent fixture of S-corp tax planning, but permanent doesn’t mean simple. Where your income falls relative to the 2026 thresholds changes whether reasonable salary is a lever worth pulling or an afterthought — and the answer is different for every S-corp, especially once you factor in whether the business is an SSTB. Our guide to setting your S-corp salary covers the reasonable-compensation side in more depth. If you want to see exactly where your numbers land for 2026, talk to us.