The QBI Deduction in 2026: Section 199A Now Permanent — Here's What Changed

If you're a tax preparer, the Qualified Business Income (QBI) deduction under Section 199A is one of the most valuable — and most misunderstood — line items on pass-through returns. A business owner with $200,000 of QBI can potentially deduct $40,000 off taxable income. At the 32% marginal bracket, that's nearly $13,000 in federal tax savings.

For nearly eight years, this deduction came with an expiration date. Section 199A was scheduled to sunset on December 31, 2025. That uncertainty hung over every multi-year tax planning decision — entity elections, compensation strategy, retirement contributions — because everything pivoted on a deduction that might not exist in 2026.

The One Big Beautiful Bill Act (OBBBA), signed into law July 4, 2025 as Public Law 119-21, killed the sunset. The QBI deduction is now permanent. The 20% rate didn't change. The core mechanics didn't change. But several things did change for 2026 that every preparer needs to understand — along with a one-year split where the 2025 return uses the old thresholds and the 2026 return uses the new ones.

Here's the complete picture.

What OBBBA Changed — and What It Didn't

OBBBA changed four things about Section 199A:

1. Permanence. The sunset at the end of 2025 is eliminated. The deduction exists indefinitely going forward.
2. Wider phase-in ranges. The income range over which the W-2 wage/UBIA limits and SSTB restrictions phase in expanded from $50,000 to $75,000 for single filers, and from $100,000 to $150,000 for MFJ.
3. New $400 minimum deduction. If a taxpayer has at least $1,000 of QBI from active qualified trades or businesses (where they materially participate under IRC §469(h)), they get a minimum $400 deduction even if the regular calculation would produce less. Both the $1,000 floor and the $400 minimum are indexed for inflation in $5 increments starting in 2027.
4. Technical clarifications. The calculation of taxable income for QBI purposes is made without regard to the new limitation on itemized deductions under §68 (the rebuilt Pease-style cap hitting 37% bracket taxpayers).

OBBBA did NOT change:

• The 20% deduction rate. (The House bill had proposed 23% — it didn't survive.)
• The core W-2 wage limit: greater of (a) 50% of W-2 wages, or (b) 25% of W-2 wages + 2.5% of UBIA of qualified property.
• The SSTB definition or the complete phase-out for SSTBs above the upper threshold.
• Who qualifies: still pass-through owners (sole props, partnerships, S-corps, and certain trusts/estates). Still not C-corps. Still not W-2 employees.
• The taxable income limit. The total QBI deduction cannot exceed 20% of (taxable income minus net capital gains).

Effective date. All OBBBA changes to §199A apply to tax years beginning after December 31, 2025. This means the 2025 return you're preparing right now uses the old TCJA rules. The 2026 return you'll prepare next year uses the new rules.

The 2025 vs. 2026 Numbers (Side by Side)

For returns currently being filed (tax year 2025):

Filing status	Threshold (full deduction below)	Upper limit (full phase-out above)
Single / HoH	$197,300	$247,300
Married Filing Jointly	$394,600	$494,600
Married Filing Separate	$197,300	$247,300

Below the threshold, the QBI deduction is available in full with no wage/UBIA limitation and no SSTB restriction. In the phase-in range, the wage/UBIA limit phases in and the SSTB exclusion phases in. Above the upper limit, the wage/UBIA limit applies fully to non-SSTBs, and SSTB income is completely excluded from QBI.

For tax year 2026 (returns you'll file in 2027), per Rev. Proc. 2025-32:

Filing status	Threshold (full deduction below)	Upper limit (full phase-out above)
Single / HoH	$201,750	$276,750
Married Filing Jointly	$403,500	$553,500
Married Filing Separate	$201,775	$276,775

Two changes embedded in the 2026 numbers:

1. Annual inflation indexing bumped the thresholds up modestly (single threshold from $197,300 → $201,750; MFJ from $394,600 → $403,500).
2. OBBBA's expanded phase-in widened the gap between threshold and upper limit from $50,000 → $75,000 (single) and $100,000 → $150,000 (MFJ). That means single filers have $75,000 of income room — instead of $50,000 — before fully losing the deduction. MFJ clients have $150,000 of room instead of $100,000.

Note the mild quirk in the IRS tables: Single and HoH both sit at $201,750, while MFS is at $201,775. Same $276,750 / $276,775 relationship on the upper end. Most summaries lump these together — the IRS doesn't.

Who Qualifies

Eligible:

• Sole proprietors filing Schedule C
• Partners in partnerships or LLCs taxed as partnerships (QBI flows through on Schedule K-1)
• S-corp shareholders (QBI flows through on Schedule K-1)
• Certain trusts and estates with pass-through income
• Farmers filing Schedule F
• REIT dividends and qualified publicly traded partnership (PTP) income (these get their own 20% deduction, not subject to the W-2/UBIA limits)

Not eligible:

• C-corporations (they have their own 21% flat rate)
• W-2 employees (wages aren't QBI, even if the person is also a shareholder)
• Investment income unrelated to a trade or business
• Capital gains, dividends, interest (unless from a qualifying business)
• Amounts a shareholder receives as reasonable compensation from an S-corp
• Guaranteed payments to partners (excluded from QBI but count toward W-2 wage limit)

A common source of confusion: A shareholder of an S-corp who receives both W-2 wages from the company and K-1 income is entitled to the QBI deduction only on the K-1 portion. The W-2 wages are not QBI. This structural split creates the primary reason preparers run S-corp reasonable comp analyses — too-low compensation risks an IRS challenge; too-high compensation reduces the QBI pool.

The Three-Zone Framework

Section 199A operates in three distinct zones based on taxable income (before the QBI deduction). Understanding which zone your client is in drives the entire calculation.

Zone 1: Below Threshold — Full Deduction

For 2026, this is taxable income of ≤ $201,750 (single/HoH), ≤ $403,500 (MFJ), or ≤ $201,775 (MFS).

Deduction = 20% × QBI (subject only to the overall taxable income cap).

• No W-2 wage limit
• No UBIA limit
• SSTBs fully qualify
• No aggregation complexity
• Form 8995 (the simple one-page form) is used

This is where the majority of Schedule C clients live. A sole proprietor with $80,000 of Schedule C net profit and $95,000 of taxable income gets the full $16,000 deduction, period.

Zone 2: In the Phase-In Range — Partial Limitation

For 2026, this is taxable income between $201,750 and $276,750 (single), or between $403,500 and $553,500 (MFJ).

Inside this range, two limits begin phasing in:

1. For non-SSTBs: The W-2 wage / UBIA limit gradually applies. Above the upper limit, the full limit applies; inside the range, a proportional portion applies.

1. For SSTBs: The business is treated as a qualified trade only to the extent of an "applicable percentage." As taxable income climbs through the phase-in range, the percentage of SSTB QBI treated as qualified drops from 100% at the threshold to 0% at the upper limit.

Form 8995-A is required in this zone.

Zone 3: Above Upper Limit — Full Limitation

For 2026, this is taxable income above $276,750 (single) or $553,500 (MFJ).

For non-SSTBs: The deduction is the lesser of:

• 20% of QBI, or
• The greater of (a) 50% of W-2 wages paid by the business, or (b) 25% of W-2 wages + 2.5% of unadjusted basis immediately after acquisition (UBIA) of qualified property

For SSTBs: Zero. The SSTB income is completely excluded from QBI.

Form 8995-A is required.

The W-2 Wage / UBIA Limit Explained

Above the threshold, the W-2 wage / UBIA limit is what separates a big deduction from no deduction. The formula:

Deduction cap = greater of:

• Option A: 50% × W-2 wages paid by the business
• Option B: (25% × W-2 wages) + (2.5% × UBIA of qualified property)

What counts as W-2 wages:

• Wages paid to the business's employees, including shareholder-employees
• Includes elective deferrals to 401(k)s and similar plans
• Must be reported on W-2s the business actually files
• Wages paid to independent contractors don't count
• Wages paid by a professional employer organization (PEO) count if properly allocated

What counts as UBIA of qualified property:

• Unadjusted basis (purchase price + capitalized costs, before depreciation) of tangible depreciable property
• Property must still be within its "depreciable period" — the longer of 10 years from placed-in-service or the full MACRS recovery period
• Property used in the production of QBI
• Excludes land

Why Option B exists. The W-2-only formula (Option A) punishes capital-intensive businesses with few employees — a real estate rental operation, for example, or a machinery-heavy manufacturer owned by one person. Option B gives these businesses partial credit for the property they own, which is the labor equivalent in those industries.

Quick example. A single-owner manufacturing S-corp:

• QBI: $500,000
• W-2 wages (including shareholder's reasonable comp): $150,000
• UBIA of equipment: $1,200,000

Option A: 50% × $150,000 = $75,000

Option B: (25% × $150,000) + (2.5% × $1,200,000) = $37,500 + $30,000 = $67,500

Cap = greater of these = $75,000

20% × QBI = $100,000

Deduction = lesser of $100,000 or $75,000 = $75,000

If the shareholder took $250,000 in reasonable comp instead of $150,000, W-2 wages would rise but QBI would fall (because comp reduces pass-through income). Running the numbers both ways is standard planning for above-threshold S-corp clients.

SSTBs — The List That Ends Careers

Specified Service Trades or Businesses are fields where the IRS presumes the business's principal asset is the reputation or skill of its employees. SSTBs face no limitation below the threshold, a phase-out within the range, and zero QBI deduction above the upper limit.

SSTB categories (codified in §199A(d)(2)(A) and Treasury Regulations):

• Health (doctors, dentists, veterinarians, therapists, pharmacists)
• Law
• Accounting
• Actuarial science
• Performing arts
• Consulting
• Athletics
• Financial services (investment advisors, wealth managers)
• Brokerage services
• Investing and investment management
• Trading
• Dealing in securities, partnership interests, or commodities
• Any trade or business where the principal asset is the reputation or skill of one or more employees

Explicitly NOT SSTBs (even though you might think they are):

• Engineering and architecture — specifically excluded by statute
• Real estate investing, rental, and property management (brokerage is; passive ownership isn't)
• Insurance agents selling third-party products
• Software development (unless operating as an SSTB consulting practice)

The "principal asset is reputation or skill" catch-all. Final regulations narrowed this significantly: it applies primarily to (1) individuals receiving income for endorsements, use of image/likeness, or appearance fees, and (2) individuals licensing their name or likeness for commercial products. A skilled craftsperson running a custom furniture shop is not an SSTB under this prong, even though reputation matters. The catch-all is designed for celebrities and athletes, not talented contractors.

The 10% de minimis rule. A business with gross receipts ≤ $25 million is treated as fully non-SSTB if SSTB services are less than 10% of gross receipts. Above $25 million, the threshold drops to 5%. This matters for hybrid businesses — e.g., an equipment dealer that also does consulting on the side.

Aggregation: Combining Businesses to Boost the Deduction

Above the threshold, a taxpayer with multiple businesses may elect to aggregate them into a single "trade or business" for QBI purposes. Aggregation lets W-2 wages and UBIA from one business offset another business's limits.

Requirements for aggregation:

• Same taxpayer (or a group of related parties) owns 50%+ of each business
• Ownership is consistent through most of the tax year
• All businesses use the same tax year and are not SSTBs
• The businesses meet at least two of three factors: (a) same product/service, (b) shared facilities or employees, (c) operate in coordination

Why aggregate. A client owning two S-corps — one with high W-2 wages but modest profit, and one with high profit but minimal wages — can often dramatically increase the combined deduction by aggregating. The wage-rich business's excess W-2 capacity shelters the wage-poor business's income.

Aggregation election is binding. Once made, it must be maintained in subsequent years, and any additional businesses acquired must be added to the group if they meet the same criteria.

The New $400 Minimum Deduction

OBBBA added §199A(i), a small but meaningful floor starting in 2026.

The rule: If a taxpayer has at least $1,000 of aggregate QBI from all active qualified trades or businesses — where the taxpayer materially participates under IRC §469(h) — the QBI deduction is the greater of:

• The regular calculation, or
• $400

Example. A client has $1,500 of QBI from a side business. Regular calculation: 20% × $1,500 = $300. Minimum deduction: $400. The client gets $400.

Both the $1,000 QBI floor and the $400 minimum are indexed for inflation in $5 increments beginning in 2027.

Two things to note:

1. Material participation matters here. Passive income doesn't trigger the minimum. The taxpayer must actually participate in the business under §469(h) — the same test used for passive activity loss rules.

1. The minimum caps out fast. Above $2,000 of QBI, the regular 20% calculation ($400) meets or exceeds the minimum, so the minimum stops mattering. This is a true floor for very small operators, not a windfall for larger businesses.

Reasonable Compensation: The S-Corp Balancing Act

For S-corp shareholders above the threshold, reasonable compensation is the single most consequential planning decision. The dynamics:

• Shareholder W-2 wages are not QBI (they reduce the QBI pool)
• Shareholder W-2 wages do count toward the W-2 wage limit
• Too little comp: IRS reclassifies distributions as wages → payroll taxes + penalties
• Too much comp: QBI shrinks → smaller deduction

The sweet spot is the lowest defensible reasonable comp that still supports the W-2 wage limit you need. For a profitable S-corp above the threshold, the planning exercise is:

1. Calculate the W-2 wage/UBIA limit at various comp levels.
2. Calculate the QBI deduction at each level.
3. Add back the self-employment tax savings from lower comp.
4. Compare the after-tax result.

This is not software-automatable. Preparers earn their fees here.

Guaranteed Payments, Reasonable Comp, and the QBI Pool

Three rules most preparers internalize but clients don't:

• Guaranteed payments to partners (for services or use of capital) are NOT QBI to the recipient partner, but they reduce the partnership's QBI pool. They DO count as W-2 equivalent wages for the partnership's own wage limit calculations in some contexts — the rules are technical.
• S-corp reasonable comp is not QBI but counts toward W-2 wages.
• Partner distributive share of ordinary income is QBI; capital gains allocated through the K-1 are not.

Rental Real Estate and the 250-Hour Safe Harbor

Rental activity can qualify for QBI if it rises to the level of a §162 trade or business. Because that's a fact-specific test, the IRS issued Rev. Proc. 2019-38, a safe harbor under which a rental enterprise is treated as a trade or business for QBI purposes if:

• 250+ hours of rental services are performed per year
• Services are documented contemporaneously
• Separate books and records are maintained
• The enterprise isn't a triple-net lease
• The property isn't also used as a personal residence

Many small landlords miss this deduction entirely because they don't realize rental income can qualify. Others claim it without meeting the safe harbor requirements and expose themselves in audit.

Which Form: 8995 or 8995-A?

Form 8995 (simplified): Use when taxable income (before QBI) is below the threshold AND the taxpayer isn't a patron in a specified agricultural/horticultural cooperative.

Form 8995-A (full): Use in any other case — above threshold, SSTB with phase-in, aggregation, agricultural cooperative patron, any complication.

Most Schedule C clients use Form 8995. High-income professionals, S-corp owners above the threshold, and aggregation elections trigger Form 8995-A.

Common Preparer Mistakes

1. Using 2025 thresholds on a 2026 return (or vice versa). The OBBBA expansion takes effect for tax years beginning after December 31, 2025. The 2025 return uses the old $197,300 / $394,600 numbers; the 2026 return uses the new $201,750 / $403,500 numbers.

2. Treating engineering or architecture as SSTBs. They aren't — statute explicitly excludes them. High-income engineers and architects routinely get surprised (favorably) when they learn the deduction is fully available above thresholds.

3. Missing the aggregation election. For clients above the threshold with multiple businesses, aggregation can be worth tens of thousands. It's an active election, not automatic — preparers have to consider it.

4. Including S-corp reasonable comp in QBI. It's not QBI, full stop. Include only the pass-through ordinary income on the K-1.

5. Excluding rental income without evaluating the safe harbor. Small landlords routinely miss the deduction. Rev. Proc. 2019-38 has a clear test — apply it.

6. Forgetting the overall taxable income cap. The total QBI deduction cannot exceed 20% of (taxable income − net capital gains). A client in a low-income year can have the deduction capped by this limit, not by the business-level calculations.

7. Applying the $400 minimum to 2025 returns. The minimum is new under OBBBA and doesn't apply until 2026. Small Schedule C clients with $1,500 of QBI still only get $300 on their 2025 return.

8. Not treating the deduction as "below the line." QBI is a taxable-income deduction, not an AGI deduction. It doesn't reduce self-employment tax, doesn't affect MAGI for phase-outs on other credits, and doesn't reduce gross income for purposes of calculating the retirement contribution limit on a SEP-IRA or solo 401(k).

9. Missing SSTB status for a dual-purpose business. A business that's mostly non-SSTB can still become fully tainted if SSTB receipts exceed the 10% de minimis limit ($25M gross receipts threshold; 5% above that). Run the check annually.

10. Ignoring state conformity. Most states conform to §199A, but California, New Jersey, Pennsylvania, and a handful of others don't. A client getting a $40,000 federal QBI deduction may get $0 on their state return. Always verify state treatment.

What Tax Preparers See on Bank Statements

For write-up work, the QBI deduction isn't a bank-statement-level categorization decision — it's calculated after the return's ordinary income is determined. But several categorization choices feed directly into the QBI computation:

Income that becomes QBI:

• Schedule C net profit (sole prop)
• K-1 Box 1 ordinary business income (partnership, S-corp)
• K-1 Box 2 rental real estate (if the 250-hour safe harbor is met)
• Schedule F net profit (farming)

Income that does NOT become QBI:

• W-2 wages (to the shareholder or anyone else)
• Capital gains
• Dividends (except qualified REIT dividends, which get their own 20%)
• Interest (unless from a qualifying business)
• Guaranteed payments to partners

Categorization choices that affect the QBI pool:

• Reasonable comp via payroll vs. distributions (S-corp)
• Guaranteed payments vs. profit splits (partnership)
• Whether rental activity is coded as investment or a §162 trade/business
• Whether expenses are deducted currently or capitalized (affects QBI downstream)

Because QBI flows from ordinary business income, a properly categorized P&L is the foundation of a correct QBI calculation. Miscategorize distributions as wages, or lump rental income with business income without the safe harbor analysis, and the QBI number becomes wrong.

WriteupOS maps every transaction to the correct Schedule C, 1065, 1120S, or 1120 line item, which means the ordinary income number that flows into QBI starts accurate. That matters especially for above-threshold clients where the W-2 wage limit is in play and every dollar of QBI affects the deduction.

Planning Moves That Actually Work

For clients near the threshold:

• Defer income or accelerate deductions to stay below the threshold and avoid the W-2 wage limit and SSTB phase-out entirely.
• Maximize pre-tax retirement contributions (solo 401(k), SEP-IRA, defined benefit plan) — these reduce taxable income dollar-for-dollar.
• HSA contributions, if eligible, reduce AGI.
• For married couples: consider whether MFJ or MFS produces a better result (uncommon but possible for specific income mixes).

For SSTB clients in the phase-in range:

• Retirement contributions are especially high-value because each dollar reduces taxable income while preserving QBI eligibility.
• Charitable contributions via a donor-advised fund can be bunched to reduce taxable income in targeted years.

For non-SSTB clients above the upper threshold:

• Focus on the W-2 wage / UBIA side. Hire employees vs. contractors where possible. Consider reasonable comp strategy for S-corps.
• Aggregation across related entities.
• Capital purchases with high UBIA (but don't let the tax tail wag the dog — run the numbers).

For clients with multiple entities:

• Review aggregation election annually. Changing business mix can change the optimal grouping.

For all clients with small side businesses:

• Don't forget the new $400 minimum deduction starting 2026. A client with $1,200 of QBI from a side gig gets $400, not $240.

The Bottom Line for 2026

The QBI deduction is now permanent. For tax preparers, that shifts the planning horizon from "use it before it expires" to "build a multi-year strategy around it." The 20% rate stays. The mechanics stay. But with the wider 2026 phase-in ranges, more clients will qualify for at least a partial deduction, and the new $400 minimum gives small active business owners a floor that didn't exist before.

The 2025 vs. 2026 split is the immediate tax-season issue: 2025 returns use the old $197,300 / $394,600 thresholds; 2026 returns use the new $201,750 / $403,500 thresholds with the wider $75K/$150K phase-in. Don't cross-apply.

For write-up work, the discipline is simple: categorize ordinary business income accurately. Whatever hits the Schedule C net profit line, or K-1 Box 1, or K-1 Box 2 with proper rental real estate safe harbor, becomes the starting point for the QBI calculation. Everything else — reasonable comp analysis, aggregation, W-2/UBIA limits — flows from that foundation.

Get the ordinary income right, and the QBI calculation is mechanical. Get it wrong, and you're re-running the deduction three times.