- For tax year 2026, the 199A phase-in starts at approximately $250,000 taxable income (single) and $400,000 (married filing jointly) verified May 25, 2026, per the inflation-adjusted thresholds in Rev Proc 2025-32; confirm the exact figure against Form 8995-A instructions for your filing year.
- Below the threshold, every pass-through gets up to 20 percent of QBI deducted, no SSTB carve-out, no wage limit. Above the top of the phase-in range ($75K single / $100K joint above threshold), SSTBs are excluded and non-SSTBs face the W-2 wages / UBIA cap.
- The most common 199A planning lever for high earners is S-corp election for non-SSTB activities, because owner-employee wages count toward the W-2 wage cap; the math hinges on reasonable compensation and breaks down differently for SSTB owners, who get no relief above the phase-in.
In this article
- What is the QBI deduction in 2026?
- 2026 income thresholds and where the phase-in starts
- How the deduction is calculated above the threshold
- What is an SSTB and why does it phase out faster?
- How does the W-2 wages / UBIA limit work?
- When should an LLC elect S-corp to optimize QBI?
- Where most QBI deductions get clawed back at audit
- Bottom line
- FAQ
What is the QBI deduction in 2026?
The QBI deduction is a federal deduction of up to 20 percent of the net income from a pass-through business, taken on the owner's personal Form 1040 below adjusted gross income but above taxable income. It was created by the 2017 TCJA as a partial offset to that law's reduction of the C-corporation tax rate from 35 percent to 21 percent, on the theory that pass-through owners should not be punished for not converting to C-corp form[1]. The deduction lives at IRC § 199A and is implemented through Treasury regulations 26 CFR § 1.199A-1 through 1.199A-6, finalized in TD 9847 and refined in TD 9890[2].
Concretely, if you are a sole proprietor, an LLC member, an S-corp shareholder, or a partner in a partnership, the income that flows through to your personal return from that business is eligible to be treated as QBI. You take 20 percent of that QBI as a deduction against your taxable income, subject to the limits this article walks through. A sole proprietor with $100,000 of net Schedule C income and taxable income well under the threshold deducts $20,000 under 199A, reducing federal income tax on that activity by 20 percent of the marginal rate.
The deduction was enacted with a statutory sunset: the entire pass-through 199A provision was scheduled to expire after tax year 2025 unless Congress extended it[3]. As of May 2026, extension legislation has moved through congressional consideration and the deduction remains available for 2026, though operators should treat the legislative status as the only piece of this article subject to short-term change. Verify the current legislative posture against IRS announcements before relying on 199A in 2026 returns.
Every figure in this article is grounded in IRC § 199A as currently in effect. The provision's TCJA sunset and any post-sunset legislative changes are the only thing that could move these mechanics meaningfully in 2026 or 2027. Subscribe to the IRS newsroom and check the current Form 8995-A instructions before filing.
2026 income thresholds and where the phase-in starts
The 199A threshold is the level of taxable income (computed before the 199A deduction itself) at which the rules switch from the simplified "everyone gets 20 percent" regime to the limit-heavy regime that distinguishes SSTBs from non-SSTBs and applies the W-2 wages / UBIA cap. The thresholds are statutory base figures adjusted annually for inflation.
For tax year 2026, the inflation-adjusted thresholds, per IRS Revenue Procedure 2025-32 issued in October 2025, are approximately $250,000 for single, head-of-household, and married-filing-separate filers and approximately $400,000 for married-filing-jointly filers verified May 25, 2026[4]. The exact figures in the published Rev Proc may differ by a few hundred dollars from these approximations as the inflation factor flows through; confirm against the current Form 8995-A instructions for your filing year. The 2025 thresholds, for reference, were $241,950 (single) and $383,900 (joint) per Rev Proc 2024-40[5].
The phase-in range above the threshold covers the next $75,000 of taxable income for single filers and the next $100,000 for joint filers. So a single filer's regime changes at $250K, transitions through $325K, and lands in full-limit territory above $325K; a joint filer transitions from $400K through $500K. Inside the phase-in, the deduction is computed on Form 8995-A using a proportional formula that gradually applies the limits; above the top of the range the limits apply in full.
A trap that catches first-time filers: the threshold compares against taxable income after standard or itemized deductions but before the 199A deduction itself. AGI is too early in the stack to use directly. Use the line on Form 1040 that is taxable income, then add back the 199A deduction if you have already entered it in a tax-prep package.
It applies per return, against total taxable income. If you have three pass-through businesses, the threshold test is run once against your aggregate taxable income; you cannot stack three separate $250,000 allowances. The aggregation rules for the limits, however, can be elected per group of related trades or businesses; see Treasury Reg § 1.199A-4 for the aggregation election.
How the deduction is calculated above the threshold
The 199A calculation has two regimes, and the threshold test determines which one you use. Below the threshold, the deduction is the lesser of 20 percent of QBI from all qualified trades or businesses, or 20 percent of (taxable income minus net capital gains). That cap on the taxable-income side prevents the deduction from exceeding taxable income; it rarely binds for active operators, but it can matter for retirees with large pass-through losses or small distributions[6].
Above the top of the phase-in range, the calculation has more pieces. For each non-SSTB qualified trade or business, the deduction is the lesser of:
- 20 percent of that trade or business's QBI; or
- The greater of: (a) 50 percent of the W-2 wages paid by that trade or business, or (b) 25 percent of W-2 wages plus 2.5 percent of the UBIA of qualified depreciable property.
The 25-percent-plus-2.5-percent test is meaningful for real-estate-heavy operations and capital-intensive businesses; the 50-percent-of-W-2-wages test is the practical cap for most service or e-commerce businesses with employees. For each SSTB trade or business at this income level, the QBI from that trade is zero by statute and the entire chain collapses.
Inside the phase-in range, the rules apply a blended calculation that scales linearly from "no limit" at the threshold to "full limit" at the top of the range. The Form 8995-A worksheet handles the algebra; conceptually, if you are halfway through the range, half of the SSTB exclusion and half of the W-2 wages limit apply.
Joint filers with taxable income of $450,000 are halfway through the $400K to $500K range. Their non-SSTB QBI from a $300K sole proprietorship would be deducted at 20 percent ($60,000) unmodified below the threshold, but at $450K the W-2 wages / UBIA limit applies at 50 percent intensity. If the business pays $0 in W-2 wages and owns no real property, the limit reduces the deduction to halfway between 20 percent of QBI and zero, which works out to roughly $30,000. Hire the spouse onto W-2 payroll at a reasonable salary and the calculation changes materially.
What is an SSTB and why does it phase out faster?
An SSTB is a category of trade or business that Congress deliberately excluded from the 199A deduction at higher income levels[7]. The statutory categories, listed at IRC § 199A(d)(2)(A), are health, law, accounting, actuarial science, performing arts, consulting, athletics, financial services, brokerage services, investing and investment management, trading, dealing in securities or partnership interests, and any trade or business where the principal asset is the reputation or skill of one or more employees or owners. The Treasury regulations narrow some of these categories and provide examples for the gray areas[2].
The "reputation or skill" catch-all is the most-litigated piece because read broadly it would sweep in every solo professional. The regulations narrow it to (1) endorsements and brand-licensing income, (2) license fees for the right to use the individual's image or likeness, and (3) appearance fees. A YouTuber's ad revenue is generally not SSTB income under the narrowed rule; a celebrity's licensing fee from a fragrance line generally is.
The mechanical effect of SSTB classification is binary in the phase-in regime. Below the threshold, SSTB versus non-SSTB does not matter; both get the full 20 percent deduction. Inside the phase-in range, the SSTB income is partially excluded (proportional to where you are in the range). Above the top of the phase-in, SSTB income is excluded entirely. There is no W-2 wages workaround for an SSTB above the range; the exclusion is by category, not by capacity to create wages.
Consulting that bundles a product
A consultant selling a methodology + a software platform may have part of revenue treated as non-SSTB if the regulations' "incidental" or "de minimis" tests are met. Below 10 percent of receipts being non-SSTB usually fails the test; above and the bundle can be split.
Medical-adjacent businesses
The "health" SSTB does not automatically capture every medical-adjacent business. Selling medical devices is not SSTB; providing medical services is. A surgery center's revenue often splits between SSTB (physician services billed) and non-SSTB (facility fees).
Financial-services definition is wide
The "financial services" SSTB sweeps in advising on the value of securities, providing investment advice, and managing investments, but excludes taking deposits or extending credit. A bank's deposit-and-loan revenue is not SSTB; an RIA's advisory fee revenue is.
Anti-abuse: cracking and packing
The regulations include anti-abuse rules at 26 CFR § 1.199A-5 that disallow attempts to spin off a non-SSTB activity from an SSTB if 50 percent or more of the spin-off's services are provided to the related SSTB. Cosmetic restructures lose at audit.
How does the W-2 wages / UBIA limit work?
The W-2 wages / UBIA limit is the cap that applies to non-SSTB QBI above the phase-in range. The intent in Congress was to direct the 199A benefit to businesses that pay wages or invest in depreciable property, rather than to passive holders of business interests[1]. The mechanical formula gives operators two paths to qualify for the larger deduction.
The 50-percent W-2 wages test caps the deduction at half of the W-2 wages paid by the trade or business. A sole proprietor with no employees has $0 of W-2 wages and therefore caps at $0 under this test, which is why high-earning solo non-SSTB operators consider S-corp election: paying themselves W-2 wages as an S-corp owner-employee creates the W-2 base the limit needs. Below the threshold the W-2 question does not matter; above the top of the range, it is the dominant lever.
The 25-percent W-2 wages plus 2.5-percent UBIA test takes a smaller wage cut but adds 2.5 percent of the cost basis of UBIA of qualified depreciable property. Qualified property is tangible, depreciable property held by and available for use in a qualified trade or business at the close of the year, that is still within its depreciable period (the longer of 10 years from purchase or the recovery period under MACRS). Real estate operators with large depreciable property bases often clear the 199A limit on this test even with modest payroll[8].
Yes for an S-corp; no for a partnership or sole proprietorship. S-corp owner-employees must take reasonable compensation as W-2 wages, and those wages count toward the 50-percent test for the company's 199A cap. Partnerships pay owners as guaranteed payments or distributions, neither of which is a W-2 wage; the owner's payment does not enter the 199A wage base. Sole proprietors have no employer-employee relationship with themselves; same outcome. This asymmetry is why S-corp election is the standard 199A planning move for high-income non-SSTB sole proprietors.
When should an LLC elect S-corp to optimize QBI?
S-corp election is the most common 199A optimization for high-income owners of non-SSTB pass-through businesses, but the math is sharper than the headline suggests and breaks down differently for SSTBs versus non-SSTBs. The core trade-off: paying yourself as an S-corp owner-employee creates W-2 wages that count toward the 199A cap, at the cost of reclassifying that compensation out of QBI and subjecting it to FICA / Medicare payroll taxes[9].
For non-SSTB owners above the phase-in, the calculus generally favors electing S-corp if (1) the business is profitable enough to support a reasonable owner salary plus residual distributions, (2) the W-2 wage shortfall is materially constraining the 199A deduction, and (3) the payroll-tax cost on the wage portion is less than the FICA savings on the distribution portion plus the 199A recovery. The breakeven calculator is sensitive to state tax treatment of S-corps; consult our S-corp vs LLC breakeven analysis for the underlying math.
For SSTB owners above the phase-in, S-corp election does not solve the 199A problem; the entire QBI base is excluded by SSTB classification regardless of wage structure. SSTB owners may still elect S-corp for FICA savings on distributions, but the 199A deduction is not recoverable through entity choice. The only 199A relief for high-income SSTB owners is to bring taxable income below the threshold (retirement contributions, charitable bunching, real estate cost segregation, or shifting income across years).
S-corps that pay owner-employees below market rate to minimize FICA face the longest-standing IRS enforcement priority for closely-held businesses[10]. The IRS reclassifies under-compensated S-corp distributions as wages and assesses back FICA, interest, and penalties. The "reasonable compensation" standard does not have a bright line, but BLS occupational wage data, comparable position studies, and industry compensation surveys are the standard benchmarks. Set salary defensibly even if it slightly shrinks the 199A benefit.
Get the 2026 QBI breakeven worksheet
One-page spreadsheet: enter your filing status, projected taxable income, business QBI, and current W-2 wages; it returns your bucket and your S-corp breakeven.
Where most QBI deductions get clawed back at audit
The 199A deduction is the single largest line item on many pass-through returns, which means it gets attention. The audit failures tend to cluster in a small number of patterns; if you take the deduction, know which ones apply to your shape.
SSTB misclassification
The most common failure for high-earning consultants and financial advisors. Taxpayer claims their consulting practice is not an SSTB because they call it a "strategy firm" or because they sell deliverables; the IRS reclassifies and disallows the deduction above the phase-in. The regulations at § 1.199A-5 control here; the marketing label does not.
Schedule C losses spuriously claimed as QBI
QBI is the NET income from a qualified trade or business. A net loss does not generate a deduction; it carries to the next year and reduces that year's QBI. Several tax-prep packages have at times miscomputed prior-year QBI loss carryforwards, leaving the taxpayer with the deficiency notice.
UBIA on non-qualified property
Owners include the basis of every depreciable asset in the UBIA calculation, including property outside the qualified trade, intangibles, or property past its depreciable period. Only currently-used, currently-depreciating tangible property of the qualified trade qualifies.
Aggregation election done wrong (or not made)
Multiple commonly-controlled trades can be aggregated under § 1.199A-4 to share their W-2 wage and UBIA bases. The election is binding once made and has specific reporting requirements. Taxpayers either aggregate to take advantage of one trade's wages, or fail to aggregate when it would help, and find the issue on audit.
Rental real estate treated as a trade or business without meeting the safe harbor
Rental real estate is QBI-eligible only if it rises to the level of a trade or business under section 162. The 250-hour safe harbor in Rev Proc 2019-38 is the cleanest path; taxpayers who fail the safe harbor and have not documented 162-level activity often lose the deduction at audit[11].
Taking the deduction on C-corp dividends
199A is exclusively a pass-through deduction. C-corporation distributions to shareholders are not QBI under any circumstances. Owners of personal service C-corps occasionally try; the IRS disallows on the face of the return.
It zeros out for the current year and the loss carries to the next year's QBI calculation, reducing that year's deduction. You do not get a refundable benefit from a QBI loss, but you do not lose the loss either. Track the carryforward on Form 8995 / 8995-A; tax software typically handles this but check the prior-year carryforward line before filing.
Bottom line
The 199A deduction is straightforward below the threshold and intricate above it. For tax year 2026, the threshold begins at approximately $250,000 (single) or $400,000 (married filing jointly), with phase-in over the next $75,000 or $100,000 respectively. Below the threshold, take the deduction on Form 8995 and move on. Inside the phase-in, expect Form 8995-A and a partial application of the SSTB exclusion and W-2 wages / UBIA limit. Above the phase-in, SSTB income is fully excluded and non-SSTB income is capped by W-2 wages / UBIA.
The highest-leverage planning lever for non-SSTB owners crossing the threshold is S-corp election to create a W-2 wage base, executed at a defensible reasonable-compensation level. The highest-leverage lever for SSTB owners crossing the threshold is reducing taxable income through retirement contributions, charitable bunching, or income-timing strategies, because no entity structure rescues SSTB QBI above the range. Both moves involve trade-offs that depend on specific facts; the calculator and the breakeven analysis are not substitutes for running your numbers with a CPA who knows the 199A regulations.
One caveat worth repeating: the 199A provision sunset at the end of tax year 2025 under the original TCJA timeline. Extension legislation is the only piece of this article that could change materially in the near term. Verify the legislative status against IRS announcements before filing your 2026 return.
- Joint Committee on Taxation, General Explanation of Public Law 115-97 ("TCJA Bluebook"), JCS-1-18, Dec 2018, pp. 18-32 (section 199A legislative history). jct.gov/publications/2018/jcs-1-18. return
- Treasury Department, Final Regulations under Section 199A, TD 9847 (Feb 8, 2019) and TD 9890 (Feb 4, 2020). ecfr.gov § 1.199A-1. return
- Internal Revenue Code, 26 U.S.C. § 199A(i) (sunset clause). law.cornell.edu/uscode/text/26/199A. return
- Internal Revenue Service, Revenue Procedure 2025-32 (October 2025), annual inflation adjustments for tax year 2026. Confirm exact figures via the most recent Form 8995-A instructions. return
- Internal Revenue Service, Revenue Procedure 2024-40, tax year 2025 inflation adjustments. irs.gov/pub/irs-drop/rp-24-40. return
- Internal Revenue Code, 26 U.S.C. § 199A(a) (overall taxable-income limit). return
- Internal Revenue Code, 26 U.S.C. § 199A(d)(2)(A) (SSTB definition). return
- Treasury Regulation, 26 CFR § 1.199A-2 (UBIA of qualified property). ecfr.gov § 1.199A-2. return
- Internal Revenue Code, 26 U.S.C. § 199A(c)(4) (treatment of reasonable compensation and guaranteed payments). return
- Internal Revenue Service, S Corporation Compensation and Medical Insurance Issues (current edition). irs.gov S-corp compensation. return
- Internal Revenue Service, Revenue Procedure 2019-38 (rental real estate safe harbor). irs.gov/pub/irs-drop/rp-19-38. return
Frequently asked questions
What is the 199A QBI deduction in 2026?
Section 199A allows eligible self-employed individuals, S-corp shareholders, and partners in pass-through entities to deduct up to 20 percent of their qualified business income from federal taxable income. The deduction is currently scheduled to remain in effect through tax year 2025 under the Tax Cuts and Jobs Act sunset, with extension legislation pending; for tax year 2026 the deduction applies if Congress extends it or makes it permanent. As of May 2026 the deduction is available, though small-business owners with multi-year planning horizons should monitor for the legislative outcome.
What are the 199A income thresholds for 2026?
For tax year 2026 the thresholds at which the W-2 wages, UBIA, and SSTB limits start phasing in are approximately $250,000 of taxable income for single, head-of-household, and married-filing-separate filers, and approximately $400,000 for married-filing-jointly filers. The phase-in range covers the next $75,000 (single) or $100,000 (joint) of income; above the top of that range the full limits apply. Verify the exact 2026 figures against IRS Revenue Procedure 2025-32 or the current Form 8995-A instructions.
What is an SSTB and why does it matter?
An SSTB is a specified service trade or business: any trade or business involving the performance of services in health, law, accounting, actuarial science, performing arts, consulting, athletics, financial services, brokerage services, or any trade or business where the principal asset is the reputation or skill of one or more employees or owners. Investing and investment management are also SSTBs. Above the top of the 199A phase-in range, SSTB income is completely excluded from the deduction. Below the threshold, the classification does not matter.
How does the W-2 wages and UBIA limit work?
Above the phase-in range, the deduction for non-SSTB qualified business income is capped at the greater of 50 percent of the trade or business's W-2 wages paid to employees, or 25 percent of W-2 wages plus 2.5 percent of the unadjusted basis immediately after acquisition (UBIA) of qualified depreciable property. A sole proprietor with no employees and no real property generally caps at zero under this rule, which is why high-income solo operators consider entity restructures or hire-and-pay maneuvers to create W-2 wages.
Should I elect S-corp to optimize my QBI deduction?
S-corp election can help a high-income non-SSTB owner because the wages paid by the S-corp to the owner-employee count as W-2 wages for purposes of the 199A wage limit, even though the same dollar is no longer QBI to the shareholder. The math is sensitive: paying yourself too much reasonable salary shrinks the QBI base, paying too little risks IRS reasonable-compensation challenges, and the breakeven is non-obvious. The election is most often value-positive for non-SSTB owners with taxable income meaningfully above the phase-in top whose business has little or no depreciable real property.