QBI Deduction 2026: The Section 199A Guide to the 20% Pass-Through Write-Off — Now Permanent

What Is the QBI Deduction? The 20% Break for Pass-Through Owners in 2026

If you own a business that is taxed on your personal return — a sole proprietorship, a partnership, an S corporation, or most LLCs — the Qualified Business Income (QBI) deduction under Internal Revenue Code §199A may be the single largest write-off on your 2026 return. It lets eligible taxpayers deduct up to 20% of their qualified business income, plus 20% of qualified real estate investment trust (REIT) dividends and qualified publicly traded partnership (PTP) income, as confirmed by the IRS QBI overview. On $100,000 of business profit, a full deduction is worth $20,000 of income that is simply never taxed.[10, 1]

The deduction was created by the 2017 Tax Cuts and Jobs Act and was set to expire after 2025. That cloud is now gone: the One Big Beautiful Bill Act (OBBBA, Public Law 119-21), signed July 4, 2025, made §199A permanent and, starting in 2026, widened its income phase-in ranges and added a new minimum deduction, according to RSM US. Crucially, the rate stayed at 20% — an earlier House draft to raise it to 23% did not survive into the final law. This guide walks through who qualifies, exactly how the 2026 math works, the income thresholds and limitations that trip up high earners, and the strategies that protect your deduction.[7, 17]

Who Qualifies for the QBI Deduction?

The QBI deduction is for owners of pass-through businesses — entities that do not pay corporate income tax themselves but instead "pass through" their profit to the owners' personal returns. The IRS lists the eligible forms: sole proprietorships (reported on Schedule C), partnerships, S corporations, single-member LLCs, and some trusts and estates. Rental real estate can qualify too, if it rises to the level of a trade or business. The deduction is available whether you itemize or take the standard deduction, which makes it unusually broad.[1, 9]

Two groups are excluded. First, C corporations do not qualify — they already received a permanent 21% flat corporate rate from the TCJA, and §199A was the offsetting break designed for everyone else. Second, wages you earn as an employee are never QBI; a W-2 salary, even from your own S corporation, does not count. This distinction is the heart of many planning decisions: an S-corporation owner must pay themselves a "reasonable salary" (which is not QBI) but can take the rest as a distribution (which can be QBI), a trade-off explored in our LLC vs. S-corp guide.[1, 10]

What Counts as Qualified Business Income?

QBI is defined in Treasury Regulation §1.199A-1 as "the net amount of qualified items of income, gain, deduction, and loss" from a qualified trade or business. In plain terms, it is your net business profit — revenue minus ordinary and necessary expenses — for each U.S. business you run. Importantly, QBI is measured after the business-related deductions that reduce it, including the deductible half of self-employment tax, self-employed health insurance, and contributions to a self-employed retirement plan, as the IRS notes.[11, 1]

Several items are specifically not QBI, even though they appear on your return. The IRS excludes: capital gains and losses; dividends and interest income not allocable to a trade or business; wage income; the reasonable compensation an S corporation pays its owner; and guaranteed payments a partnership pays a partner. Also excluded is the deductible half of self-employment tax already mentioned — though note the SE tax deduction reduces QBI rather than being part of it. REIT dividends and PTP income are excluded from this "QBI component" because they are computed separately, as the next sections explain.[1, 8]

How the QBI Deduction Is Calculated: The Two-Part Formula

At its core, the deduction is the lesser of two numbers, as written in §199A(a): (1) your combined QBI amount — broadly, 20% of your qualified business income plus 20% of REIT/PTP income — or (2) 20% of your taxable income minus net capital gain. The second number is an overall ceiling that ties the break to your taxable income, so a large capital gain or a low taxable income can cap the deduction below the raw 20% of business profit. This is why the QBI deduction is taken after the standard or itemized deduction, near the bottom of Form 1040.[10, 11]

The complication is the combined QBI amount in number (1). If your taxable income is at or under the year's threshold, it is simply 20% of your QBI — clean and easy, computed on the one-page Form 8995. But once your taxable income rises above the threshold, two extra rules kick in: a limitation tied to W-2 wages and business property for ordinary businesses, and a phase-out to zero for "specified service" businesses. Those high-income rules — detailed in the next three sections — are what separate a simple QBI return from a complex one.[10, 2]

2026 Taxable Income Thresholds: $201,750 and $403,500

Everything in §199A turns on one number: your taxable income before the QBI deduction, measured against the year's threshold. For 2026, set by Revenue Procedure 2025-32 and confirmed by Current Federal Tax Developments, the threshold is $201,750 for single and other filers and $403,500 for married filing jointly. (For reference, the 2025 figures were $197,300 and $394,600.) Below the threshold, you get the simple 20% with no wage limit and no service-business penalty. Above it, the limitations phase in.[6, 19, 4, 16]

Above the threshold there is a phase-in range over which the limitations apply gradually. OBBBA widened this range for 2026: it is now $75,000 for single filers (up from $50,000) and $150,000 for joint filers (up from $100,000), per Grant Thornton. So the limitations are fully phased in at about $276,750 (single) and $553,500 (joint) — the threshold plus the new range. The wider range is taxpayer-friendly: it softens the cliff for business owners in the middle band.[20, 10]

2026 QBI thresholds and phase-in ranges:

Specified Service Trades or Businesses (SSTB): The High-Income Trap

The single biggest reason a high earner loses the QBI deduction is that their business is an SSTB — a "specified service trade or business." Treasury Regulation §1.199A-5 lists them: health, law, accounting, actuarial science, performing arts, consulting, athletics, financial services, brokerage services, investing and investment management, trading, and dealing in securities — plus any business whose principal asset is "the reputation or skill" of its owners or employees. The list draws from IRC §1202(e)(3). Notably, engineering and architecture are deliberately excluded — they are not SSTBs and keep the deduction at any income.[12, 13]

The SSTB label only matters above the threshold. If your taxable income is at or under $201,750 (single) / $403,500 (joint) in 2026, your SSTB gets the full 20% like any other business. Within the phase-in range, an "applicable percentage" of your SSTB income gradually counts less; once you clear the top of the range — $276,750 single / $553,500 joint — an SSTB's QBI deduction is zero, as Thomson Reuters explains. That cliff is why a doctor or consultant near the threshold often focuses on bringing taxable income down — a planning point we return to in the strategies section.[18, 1]

The W-2 Wage and UBIA Limitation for Non-Service Businesses

If your business is not an SSTB but your taxable income is above the threshold, a different limit applies. Under §199A(b)(2), your deduction for that business is capped at the greater of: (a) 50% of the W-2 wages the business paid, or (b) 25% of W-2 wages plus 2.5% of the UBIA — the "unadjusted basis immediately after acquisition" — of qualified depreciable property. The deduction is the lesser of this cap and the usual 20% of QBI. The rule rewards businesses that either pay real payroll or hold significant capital assets.[10, 18]

A quick example shows the bite. Suppose a single manufacturer with $300,000 of taxable income (well above the 2026 threshold) has $200,000 of QBI, pays $50,000 in W-2 wages, and owns $400,000 of qualified equipment (UBIA). The raw 20% of QBI is $40,000. But the wage cap is the greater of 50% × $50,000 = $25,000, or 25% × $50,000 + 2.5% × $400,000 = $12,500 + $10,000 = $22,500 — so $25,000. The deduction is limited to $25,000, not $40,000. This is exactly the kind of case that requires Form 8995-A rather than the simplified form.[10, 5]

REIT Dividends and PTP Income: A Separate, Simpler 20%

There is a second, often-overlooked half of §199A that even pure investors can use. Qualified REIT dividends (the ordinary, non-capital-gain dividends from real estate investment trusts) and qualified publicly traded partnership (PTP) income generate their own 20% deduction — and this component is far simpler. As the IRS confirms, it is not subject to the W-2 wage and UBIA limitation, not restricted by the SSTB rules, and not limited by the taxable-income threshold. A retiree who owns a REIT index fund in a taxable account can claim 20% of those dividends with no business at all.[1, 11]

The two components are added together to form your combined QBI amount, then capped by the overall 20%-of-taxable-income limit from Section 4. One practical consequence: REIT dividends you receive inside a fund are usually reported in box 5 of Form 1099-DIV as "Section 199A dividends," and most tax software pulls them onto Form 8995 automatically. If you hold REITs for the income, this is a small but real boost to your after-tax yield — explored further in our REIT investing guide.[1]

What OBBBA Changed for 2026: Permanence, a Wider Phase-In, and a $400 Floor

The most important 2026 change is what did not happen: the deduction did not expire. The TCJA had scheduled §199A to sunset after 2025, and OBBBA made it permanent for non-corporate taxpayers, ending years of "will it survive?" uncertainty, as RSM US and Grant Thornton confirm. The rate stayed at 20%. (Watch out for stale sources: the IRS QBI overview page still shows the old "2018 through 2025" window, and the statutory text on Cornell still reflects the pre-OBBBA $157,500 base figure — the permanence is in the new law, not yet in those pages.)[17, 20, 22]

Two structural tweaks take effect for tax years beginning after December 31, 2025. First, the phase-in ranges widened to $75,000 (single) and $150,000 (joint), as covered above — giving mid-income owners a gentler slope. Second, OBBBA added a brand-new minimum deduction of $400 for any taxpayer with at least $1,000 of QBI from an active trade or business in which they materially participate, according to Warren Averett. Both the $1,000 and $400 figures will be inflation-indexed after 2026. This floor mainly helps very small side businesses: if your QBI is $1,800, the ordinary 20% would be only $360, but the minimum lifts your deduction to $400.[21, 7, 23]

Form 8995 vs. Form 8995-A: Which One You File

The QBI deduction is claimed on one of two forms, and which one you use is decided entirely by your taxable income. If your taxable income before the deduction is at or under the threshold — $201,750 single / $403,500 joint for 2026 — you use the one-page Form 8995, Qualified Business Income Deduction Simplified Computation. There are no wage limits or SSTB tests at this level, so the form is short: list each business's QBI, add REIT/PTP income, take 20%, and apply the taxable-income cap.[2, 4, 14]

If your taxable income is above the threshold — or you are an SSTB owner above the threshold, or you want to aggregate multiple businesses — you must use the longer Form 8995-A, which carries separate Schedules A through D for the SSTB phase-out, the wage and UBIA limits, and aggregation. The Instructions for Form 8995-A walk through each. Most tax software chooses the right form automatically, but knowing which one applies tells you in advance whether your return is in the simple zone or the complicated one.[3, 5, 15]

Strategies to Maximize Your QBI Deduction in 2026

Because the deduction hinges on taxable income, the most powerful lever is keeping taxable income at or below the threshold. For an SSTB owner hovering near $201,750 (single) or $403,500 (joint), every dollar of taxable income above the line can erode the deduction, so deductions that lower taxable income do double duty. Maxing out a retirement plan — a Solo 401(k), SEP-IRA, or defined-benefit plan — and an HSA can pull income under the threshold and restore a deduction that would otherwise phase out, a point RSM US highlights as central to year-end planning.[17, 1]

Other levers matter above the threshold. Aggregating related businesses on Form 8995-A can combine a high-wage business with a low-wage one so the wage limit is met across the group. A non-SSTB that is bumping against the wage cap might add payroll (for example, converting to an S corporation and paying a reasonable salary) so that 50% of W-2 wages clears 20% of QBI — though the salary itself is not QBI, so the math has to be run both ways. And capital-intensive businesses can lean on the 2.5%-of-UBIA path. These trade-offs interact closely with entity choice, the focus of our LLC vs. S-corp guide; coordinate with a CPA before restructuring.[10, 5]

Common QBI Mistakes to Avoid

A handful of errors recur every filing season. Misjudging SSTB status is the most expensive: many owners assume any service business is an SSTB, but only the specific fields in §1.199A-5 count — engineering, architecture, and many trades and product-based businesses are not SSTBs. Another is forgetting the overall taxable-income cap: even a clean 20% of QBI is limited to 20% of taxable income minus net capital gain, so a year heavy on capital gains can shrink the deduction unexpectedly. A third is treating REIT dividends as ordinary QBI instead of the separate component, which can misstate the limitations.[12, 1]

Two more are worth flagging for 2026. Do not overlook the new $400 minimum: if you have a small active business with at least $1,000 of QBI, you are entitled to at least $400 even when 20% would be less, per Warren Averett. And do not mix up the years: 2026's thresholds are $201,750 / $403,500, while 2025's were $197,300 / $394,600 — using the wrong year's figure can put you on the wrong side of the wage and SSTB limits. When in doubt, the form instructions state the current-year thresholds explicitly.[21, 4]

Worked Examples for 2026

Example 1 — below the threshold (simple 20%). Maria is a single freelance consultant (an SSTB) with $120,000 of QBI and $110,000 of taxable income before the deduction — under the $201,750 threshold. Because she is below the line, her SSTB status and the wage limit do not matter. Her deduction is 20% × $120,000 = $24,000, checked against 20% of taxable income ($22,000). She takes the lesser: $22,000. She files the one-page Form 8995.[2, 10]

Example 2 — non-SSTB above the threshold (wage cap). David, single, runs a manufacturing business with $200,000 of QBI and $300,000 of taxable income — above $276,750, so fully limited. He pays $50,000 in W-2 wages and owns $400,000 of equipment (UBIA). The raw 20% is $40,000, but the cap is the greater of $25,000 (50% of wages) or $22,500 (25% of wages + 2.5% of UBIA) — so his deduction is $25,000. Example 3 — the $400 floor. Priya has a small active Etsy shop with $1,800 of QBI. Ordinary 20% would be $360, but OBBBA's new minimum lifts her 2026 deduction to $400, per Warren Averett.[10, 21]

Frequently Asked Questions: The 2026 QBI Deduction