If you own a sole proprietorship, single-member LLC, multi-member LLC, partnership, S-corporation, or qualifying REIT, IRC §199A can shave up to 20% off the income those entities pass through to your 1040 — before it ever hits the federal income tax brackets. For a married couple netting $200,000 of pass-through income in the 24% bracket, the deduction is worth roughly $9,600 of cash tax savings in a typical year.
But §199A is also one of the most rules-heavy sections in the Code. Whether you get the full 20%, a partial deduction, or zero depends on (a) your taxable income, (b) whether your business is a Specified Service Trade or Business (SSTB), (c) how much W-2 wages the business pays, and (d) the unadjusted basis of qualifying property the business owns. Here’s how it actually works for 2026 returns.
What §199A Is (and Isn’t)
§199A was enacted by the Tax Cuts and Jobs Act of 2017 to deliver the pass-through equivalent of TCJA’s 21% C-corporation rate cut. It is an income tax deduction, not a credit, computed and reported on Form 8995 (simplified) or Form 8995-A (full computation when income exceeds the threshold).
OBBBA (the One Big Beautiful Bill Act, signed 2025) made the §199A deduction permanent — the original TCJA sunset of 2025-12-31 is gone. The 20% rate and the full mechanics carry forward indefinitely as part of the permanent code. This removed what had been the largest single source of small-business planning uncertainty heading into 2026.
What §199A is NOT:
- Not a deduction against self-employment tax (SE tax is computed first, on Schedule SE).
- Not a deduction against payroll tax for S-corp owners (FICA still applies to reasonable wages).
- Not a deduction at the entity level — it’s claimed on the owner’s 1040.
- Not available to C-corporations (they have their own 21% flat rate instead).
2026 Taxable Income Thresholds
The whole §199A formula bifurcates around taxable income (line 15 of the 1040, computed BEFORE the §199A deduction itself). For 2026 (estimated, indexed from 2025 figures of $241,950 single / $483,900 MFJ phase-in start):
| Filing status | Phase-in begins | Fully phased in |
|---|---|---|
| Single, HoH, MFS | ~$200,000 (verify with IRS Rev. Proc. 2025 update; 2025 was $241,950) | ~$250,000 ($50k phase-in range for non-SSTB; $25k MFS) |
| Married filing jointly | ~$400,000 (2025 was $483,900) | ~$500,000 ($100k phase-in range; the threshold doubles MFS) |
Verify the official 2026 numbers against the IRS revenue procedure released in fall 2025 before filing — these are inflation-adjusted annually and the figures above are placeholders showing the structure.
Three regimes apply depending on where your taxable income lands:
| Regime | Single TI | MFJ TI | What applies |
|---|---|---|---|
| Below threshold | ≤ ~$200k | ≤ ~$400k | Simple 20% × QBI, capped at 20% × (TI − net capital gains). No SSTB rule, no W-2/UBIA limit. |
| Phase-in range | ~$200k–$250k | ~$400k–$500k | SSTB deduction phases out linearly to zero. W-2/UBIA limit phases in linearly. |
| Above threshold | ≥ ~$250k | ≥ ~$500k | SSTB deduction = $0. Non-SSTB subject to full W-2/UBIA limit. |
This is the key picture: below the lower threshold §199A is generous and almost mechanical; above the upper threshold it is generous for capital-intensive non-service businesses and brutal for service professionals.
Below-Threshold Owners — The Easy Case
If your taxable income (before QBI deduction, after the standard or itemized deduction) sits under the lower threshold, your §199A deduction is the lesser of:
- 20% of Qualified Business Income (QBI), or
- 20% of (taxable income − net capital gains − qualified dividends)
That’s it. No W-2 wage test, no SSTB filter, no UBIA computation. SSTBs (doctors, lawyers, consultants — see below) get the full deduction at this income level just like everyone else.
QBI is roughly the net income from a domestic trade or business, excluding: reasonable W-2 wages paid to S-corp owners, guaranteed payments to partners, capital gains/losses, dividends, interest income, and gains/losses on the sale of business property other than §1231 property.
Above-Threshold Owners — Non-SSTB With the W-2/UBIA Limit
If you’re above the upper threshold AND your business is NOT an SSTB, your §199A deduction is the lesser of:
- 20% of QBI, or
- The greater of:
- 50% of W-2 wages the business paid, OR
- 25% of W-2 wages + 2.5% of UBIA (unadjusted basis immediately after acquisition of qualified property — generally real estate and equipment, before depreciation)
This is the “wage limit” everyone refers to. It exists to anchor the deduction to economic substance — businesses that actually employ people or own tangible assets get a deduction; pure-cash-extraction shells don’t.
UBIA matters most for real estate, manufacturing, and capital-heavy operations where the business has lots of basis in fixed assets but pays relatively few wages. The 2.5% × UBIA alternative often beats the 50% × W-2 wages test for landlords with leverage.
Above-Threshold Owners — SSTB Means Zero Deduction
A Specified Service Trade or Business is any business where the principal asset is the reputation or skill of one or more of its employees, OR any trade or business in the following enumerated fields:
- Health — physicians, dentists, nurses, veterinarians, therapists (but NOT health clubs, spas, payment processing, or medical-device makers)
- Law — attorneys, paralegals, mediators
- Accounting — CPAs, bookkeepers, tax preparers
- Actuarial science
- Performing arts — actors, musicians, directors (NOT broadcast distribution, ticket sales, or recording engineers)
- Consulting — providing advice and counsel (NOT consulting embedded in the sale of goods)
- Athletics — athletes, coaches, team managers
- Financial services — investment advisors, wealth managers, financial planners
- Brokerage services — securities brokers (NOT real estate brokers — they’re explicitly excluded)
- Investment management — fund managers, investment advisors
- Any trade where the principal asset is the reputation or skill of one or more of its employees — a narrow catch-all targeting endorsement income, appearance fees, and licensing of name/likeness
Excluded by IRS rule (NOT SSTBs):
- Engineering and architecture (explicitly carved out)
- Real estate brokerage and management
- Insurance brokerage (selling policies on commission)
- Banking, leasing, lending (banks themselves are not SSTBs even though they’re “financial services” in casual use)
If your business is an SSTB and your taxable income exceeds the upper threshold (~$250k single / ~$500k MFJ), your §199A deduction for that business is $0. Inside the phase-in range, the deduction phases out linearly.
Phase-In Range — The Linear Squeeze
In the phase-in range, both the SSTB cliff and the W-2/UBIA limit phase in proportionally. For a single filer between ~$200k and ~$250k (50k phase-in window):
Phase-in percentage = (TI − lower threshold) / 50,000For an SSTB in the phase-in range:
- Tentative deduction = 20% × QBI
- Reduction = Tentative × Phase-in %
- Final deduction = Tentative − Reduction
For a non-SSTB in the phase-in range, the W-2/UBIA limit only kicks in for the same phase-in percentage of the gap between unlimited deduction and W-2/UBIA-capped deduction.
The math here is mechanical but punishing — every additional $1k of taxable income inside the phase-in range claws back roughly $400 of §199A deduction for SSTBs (20% × $1k QBI × 2% phase-in shift). Marginal rates inside the phase-in window can exceed 50%.
Worked Example A — Below Threshold (Sole Prop)
A freelance web developer, single filer, no other businesses:
- Schedule C net profit: $80,000
- Half of SE tax (Schedule 1 adjustment): $5,652
- Standard deduction (2026 est): $15,500
- Other adjustments: $0
Taxable income before §199A = $80,000 − $5,652 − $15,500 = $58,848
This is well below the ~$200k single threshold, so the easy case applies.
- QBI = $80,000 − $5,652 (half-SE deduction reduces QBI) = $74,348
- 20% × QBI = $14,870
- 20% × (TI − net cap gains) = 20% × $58,848 = $11,770
- §199A deduction = $11,770 (the lesser)
Net taxable income = $58,848 − $11,770 = $47,078. The deduction shaves ~$1,400 off the federal tax bill at the 12% bracket.
Key takeaways: at this income level the cap is actually the (TI − cap gains) limit, not the QBI limit. The deduction is real money even at modest incomes.
Worked Example B — SSTB Above Threshold (Doctor)
A solo practitioner internist, MFJ, spouse W-2 income $100k:
- S-corp K-1 ordinary income from medical practice: $300,000
- W-2 wages from the S-corp to the doctor (reasonable comp): $150,000
- Spouse W-2: $100,000
- Combined wages reported on 1040: $250,000
- Itemized deductions: $35,000
Taxable income before §199A = $300,000 + $250,000 − $35,000 = $515,000
This is above the ~$500k MFJ upper threshold. The practice is a health SSTB.
- §199A deduction = $0
The entire $300k of pass-through income hits the brackets at the marginal rate (32% federal for MFJ at $515k), with no QBI relief. This is the SSTB cliff: a doctor making $1 more than the upper threshold loses 100% of their potential §199A deduction.
Planning move: had the couple maxed defined-benefit pension contributions or cash-balance plan contributions enough to drop taxable income to $499k, they would have unlocked a partial deduction (potentially $10–30k depending on phase-in math). This is why high-income service professionals stack retirement plans aggressively — every dollar deferred below the threshold buys 20¢ of §199A back.
Worked Example C — Non-SSTB Above Threshold With W-2 Wages (Manufacturer)
A widget-manufacturing partnership, MFJ owner, 50% partner:
- Allocated share of QBI from partnership: $400,000
- Other income (spouse W-2 + investments): $200,000
- Total taxable income: $580,000
- Partnership W-2 wages paid (total): $800,000; owner’s allocable 50% share: $400,000
- Partnership UBIA: $1,000,000; owner’s allocable 50% share: $500,000
Above the ~$500k MFJ upper threshold, manufacturing is NOT an SSTB.
- Tentative deduction = 20% × $400,000 = $80,000
- W-2 limit:
- 50% × $400,000 = $200,000
- 25% × $400,000 + 2.5% × $500,000 = $100,000 + $12,500 = $112,500
- Greater = $200,000
- §199A deduction = lesser of $80,000 or $200,000 = $80,000
The W-2 limit doesn’t bite — manufacturing partnerships pay enough wages that the deduction is QBI-capped, not wage-capped. The owner gets a full $80,000 deduction, worth ~$28,000 in federal tax at the 35% bracket. This is why §199A has been such a windfall for capital-light service-adjacent businesses with payrolls — software companies, marketing agencies, construction contractors.
REIT Dividends and Qualified PTP Income — A Separate Bucket
§199A has a second component that operates entirely separately from the QBI rules: 20% of the sum of qualified REIT dividends and qualified PTP (publicly traded partnership) income.
This component has no SSTB limitation, no W-2 wage limit, no UBIA test, and no taxable income threshold. It is overall capped at 20% × (TI − net capital gains), same as the QBI side.
Practical implication: REIT dividends (whether received directly or via a mutual fund / ETF holding REITs) generate a clean 20% deduction even for high-income SSTB owners locked out of the QBI component. A $50,000 REIT dividend stream produces a $10,000 §199A deduction with no questions asked.
Strategic Moves
For SSTB owners near the threshold:
- Defer income: §401(k) max ($24,500 for 2026 with catch-up if 50+, est.), defined-benefit pension (potentially $250k+ for a 55-year-old high earner), HSA, deferred comp. Every dollar moved below the threshold returns a slice of §199A.
- Accelerate deductions: bunch charitable contributions, prepay deductible state tax up to SALT cap, time large business equipment purchases for full §179 expensing.
- Split S-corp / partnership entities: a single legal entity that combines an SSTB activity (consulting) with a non-SSTB activity (software product) can sometimes split. But the “de minimis” rule treats a business with <10% SSTB gross receipts ($25M+ in receipts: <5%) as fully non-SSTB; conversely a >10% SSTB activity taints the whole entity.
For non-SSTB owners above the threshold:
- Run more wages through the business: an S-corp election lets you convert what would be partnership distributions into a wage/distribution split. Higher reasonable comp = larger W-2 base = a higher W-2 limit (50% × wages) for §199A.
- Hold the real estate inside the business (or in a related entity that leases to the business): UBIA on land + building lifts the 2.5% × UBIA component of the wage-or-UBIA test.
- Consider C-corp conversion ONLY if the §199A vs 21%-rate math favors C — usually it doesn’t at modest scale (double-taxation on distributions still bites), but for businesses retaining substantially all earnings to reinvest, the math sometimes flips.
For real-estate landlords:
The Tax Court and IRS have laid out a §199A safe harbor for rental real estate (Rev. Proc. 2019-38): keep separate books per “rental enterprise,” log 250+ hours of rental services per year (you OR your contractors), and treat the activity as a trade or business. UBIA-driven §199A on a leveraged real estate portfolio can be substantial.
Cross-Reference Reading
- LLC vs S-Corp tax comparison — the entity-choice decision that drives W-2 wage levels and SE tax exposure
- Schedule K-1 explained — where §199A items are reported on partnership/S-corp K-1s (Box 20 codes for partnerships, Box 17 for S-corps)
- Self-employment tax: how it works — runs in parallel with §199A; the half-SE deduction reduces both AGI and QBI
- Standard vs itemized: which to choose — affects the taxable-income figure that drives §199A thresholds
FAQs
Do I have to be self-employed to claim §199A?
No — but you have to receive pass-through income from a qualifying trade or business. W-2 wages from your employer don’t qualify, even if you’re an executive. K-1 income from a partnership or S-corp where you’re a passive investor DOES qualify (subject to all the same SSTB / wage / UBIA tests). REIT dividends in a brokerage account also qualify.
Can I claim §199A if my business has a loss?
A §199A loss in one business reduces QBI from other businesses in the same year. If total QBI across all businesses is negative, the loss carries forward to reduce next year’s QBI. You don’t get a “deduction for a loss” — §199A is a deduction off positive QBI, not a credit.
How does §199A interact with the standard deduction?
§199A is applied AFTER the standard or itemized deduction in the taxable-income computation. So your $15,500 standard deduction (2026 est) reduces the taxable income figure used for the §199A thresholds AND reduces the (TI − net cap gains) cap. For high-income owners on the SSTB cliff, switching from itemized to standard can sometimes flip the §199A outcome.