The Section 199A deduction is worth up to 20 percent of your pass-through profit, taken off the top of taxable income with no cash outlay and no account to fund. For a resident who nets $28,000 on a , that is roughly a $5,200 deduction claimed with one extra form. For a practice owner netting $500,000, it is frequently worth exactly zero, because Congress classified medicine as a business the deduction is designed to exclude at high incomes. The One Big Beautiful Bill Act (Pub. L. 119-21, July 2025) made the deduction permanent and widened its phase-out bands beginning in 2026, so the boundaries below are not transition-year trivia — they are the durable map. For physicians, everything reduces to one number: taxable income, measured against thresholds that Rev. Proc. 2025-32 sets at $201,750 (single) and $403,500 (married filing jointly) for 2026.
Twenty percent of what: the mechanics in four sentences
Qualified business income is the net profit of your trade or business — the bottom line of Schedule C for a 1099 physician, or your share of a partnership or S corporation — reduced by the deductible half of self-employment tax, self-employed health insurance premiums, and self-employed retirement contributions attributable to that business. The deduction equals the lesser of 20 percent of QBI or 20 percent of your taxable income minus net capital gains. It sits below adjusted gross income, so you can claim it whether or not you itemize. It reduces income tax only: not self-employment tax, not Medicare surtaxes, not your AGI.
Key insight
The deduction is computed against taxable income, not practice income. That cuts both ways. A spouse's W-2 can push a modestly profitable practice out of the deduction entirely, and a large deductible retirement contribution can pull a high-grossing practice back in. Every planning move in this article works by moving taxable income, because for a physician that is the only lever Section 199A responds to.
W-2 wages are never qualified business income. Your hospital salary generates nothing here; only the 1099, partnership, or S corporation side of your income does. If your entire income is a W-2, you can stop reading and lose nothing.
Medicine is a specified service trade or business, and that is the entire problem
Treas. Reg. §1.199A-5(b)(2)(ii) lists the performance of services in the field of health — explicitly including physicians — as a specified service trade or business, an SSTB. For SSTB owners, the deduction phases out across a band of taxable income and is completely eliminated above it. A plumber netting $600,000 keeps a wage-limited deduction; an anesthesiologist netting $600,000 keeps nothing. That asymmetry was a deliberate design choice in 2017, and Pub. L. 119-21 preserved it while making the statute permanent.
The SSTB label follows the service, not the entity. Electing S corporation status does not launder clinical income into non-SSTB income. Neither does routing collections through an LLC, a management company you also own, or a staffing arrangement in which you remain the one rendering care.
Important
The self-rental trap: if you own the building through a separate LLC and rent it to your own practice, §1.199A-5(c)(2) treats that rental income as SSTB income too, because the tenant is a commonly controlled specified service business. Physicians are routinely told the building income is a separate, deduction-eligible business. Under common control, it is not.
The 2026 bands: memorize two numbers, not ten
Rev. Proc. 2025-32 sets the 2026 threshold amounts, and Pub. L. 119-21 §70105 widened the phase-in ranges from $50,000/$100,000 to $75,000/$150,000 beginning this year — a meaningfully gentler slope than the 2018–2025 rules.
| Filing status | Full deduction below | Phase-out band | Deduction is $0 at or above |
|---|---|---|---|
| Single / head of household | $201,750 | $201,750–$276,750 | $276,750 |
| Married filing jointly | $403,500 | $403,500–$553,500 | $553,500 |
| Married filing separately | $201,775 | $201,775–$276,775 | $276,775 |
Below the bottom of the band, a physician gets the full 20 percent deduction and the SSTB label is irrelevant. At or above the top of the band, a physician gets zero, no matter how the practice is structured. Inside the band, the deduction shrinks proportionally as taxable income climbs — at the midpoint you keep roughly half.
Two smaller 2026 changes are worth knowing. First, the deduction is now permanent; there is no sunset to plan around. Second, Pub. L. 119-21 added a minimum deduction of $400 for any taxpayer with at least $1,000 of QBI from a business in which they materially participate — trivial in dollars, but even a lightly moonlighting physician above the band now claims something.
The moonlighting resident inside the band gets every dollar
Residents and fellows who pick up 1099 moonlighting shifts are the cleanest beneficiaries in medicine, because their taxable income sits far below $201,750.
Example calculation
Assumptions, stated explicitly: PGY-3, single, W-2 stipend $72,000; moonlighting collections $32,000 with $4,000 of deductible expenses, so Schedule C net profit is $28,000; standard deduction $16,100 (Rev. Proc. 2025-32); no other income; 22 percent marginal bracket.
Self-employment tax: $28,000 × 92.35% = $25,858; × 15.3% = $3,956. Deductible half: $1,978. QBI: $28,000 − $1,978 = $26,022. Taxable income: $72,000 + $28,000 − $1,978 − $16,100 = $81,922 — far below $201,750, so the SSTB rules and wage limits never activate. Deduction: 20% × $26,022 = $5,204 (the taxable-income cap, 20% × $81,922 = $16,384, does not bind). Federal tax saved at 22 percent: about $1,145.
That $1,145 arrives every year the moonlighting continues, requires no entity, no election, and no fee — only that the income lands on Schedule C and the return claims the deduction. The 1099 starter kit covers the rest of the moonlighting tax stack; the QBI deduction is the piece that costs nothing.
The $500,000 practice owner gets zero — until a cash-balance plan moves taxable income
Now the other end of the map. A practice owner netting $500,000 who is married to a working spouse typically lands above $553,500 of taxable income and receives nothing. The structure of the practice cannot fix that. Taxable income can.
Deductible retirement contributions are the heaviest legitimate lever, and for an owner in their fifties the ceiling sits far above the $72,000 defined-contribution limit (Notice 2025-67). A cash-balance plan is a defined-benefit plan; contributions are actuarially determined by age and can reach the low-to-mid six figures for a physician in their mid-fifties, funding a benefit capped at $290,000 per year under §415(b). The legitimate tax-reduction hierarchy ranks this move near the top for owners precisely because it stacks two effects: the deduction itself, and the QBI deduction it can resurrect. Choosing the defined-contribution chassis that pairs with it starts with the solo 401(k) versus SEP-IRA comparison, because SEP-IRAs complicate both the pairing and any .
Example calculation
Assumptions, stated explicitly: internist practice owner, age 55, sole proprietor, net practice income $500,000 after $220,000 of staff W-2 wages; spouse W-2 income $200,000; married filing jointly; standard deduction $32,200; 2026 bands per Rev. Proc. 2025-32; figures rounded to the nearest dollar.
Baseline. Deductible half of SE tax: $18,134. Solo 401(k): $72,000. Taxable income: $700,000 − $18,134 − $72,000 − $32,200 = $577,666. Above $553,500, so the QBI deduction is $0.
Add a cash-balance plan contributing $180,000, with the defined-contribution side trimmed to $54,500 (the $24,500 deferral plus a roughly 6 percent employer piece, the usual pairing constraint). Total retirement deduction: $234,500. New taxable income: $700,000 − $18,134 − $234,500 − $32,200 = $415,166 — inside the band. QBI: $500,000 − $18,134 − $234,500 = $247,366. Phase-out: ($415,166 − $403,500) ÷ $150,000 = 7.8% lost; 92.2% retained. Includible QBI: 92.2% × $247,366 = $228,071; tentative deduction: 20% × $228,071 = $45,614. Wage check: 50% × (92.2% × $220,000 staff wages) = $101,420 — well above the tentative amount, so no wage-limit reduction. QBI deduction: roughly $45,600. Federal tax saved by the QBI deduction alone, at a 35 percent marginal rate: roughly $16,000 — on top of the deferral value of the $234,500 itself.
The precise inside-the-band arithmetic (the applicable-percentage step, the phased wage limit) is genuinely fiddly, and competent tax software or a CPA runs it correctly. What no software can do after December 31 is create the contribution. The plan must exist, and cash-balance plans generally must be adopted and funded on a schedule an actuary sets — this is a mid-year decision, not an April one.
Wages, UBIA, aggregation: what you actually need, briefly
Three mechanics get outsized airtime relative to their relevance for physicians. The W-2 wage limit — the deduction cannot exceed 50 percent of wages the business pays, or 25 percent of wages plus 2.5 percent of depreciable property basis — matters only inside or above the band, and above the band an SSTB is already at zero. So for physicians it only ever pinches inside the band, and mostly when the practice pays little in staff wages: a solo 1099 physician pays no W-2 wages at all (a sole proprietor cannot pay themselves a wage), so a solo physician inside the band can see the deduction squeezed by the wage limit even before the SSTB phase-out finishes the job. Aggregation under §1.199A-4 lets commonly controlled businesses combine wages and income — useful for owners with genuine side businesses, but SSTBs cannot be aggregated, so it rarely rescues a medical practice. If any of these three apply to you, the honest advice is one hour with a CPA who prepares physician returns, not a weekend of forum reading.
Common questions
Does my hospital W-2 salary generate any QBI deduction?
No. Wages are excluded from qualified business income by statute. Only self-employment income — 1099 work, partnership distributive shares, S corporation profit passed through on a K-1 — counts. A physician with $450,000 of W-2 income and no side income has a QBI deduction of exactly $0, and nothing is lost by ignoring Section 199A entirely.
I am under the threshold. Do I need an LLC or S corporation to claim it?
No. A sole proprietor filing Schedule C claims the identical deduction. An S corporation can actually shrink it, because the reasonable salary you must pay yourself is excluded from QBI. If someone is selling you an entity to capture this deduction, the pitch is backwards — see the honest S corporation analysis before signing anything.
My spouse and I are both physicians. Whose income counts against the band?
The band is measured against joint taxable income, not against each business separately. Two employed physicians with one small 1099 side practice can be pushed past $553,500 by their W-2s alone, eliminating the deduction on a side practice that nets $40,000.
Does the QBI deduction reduce self-employment tax?
No. Self-employment tax is computed on net earnings before the QBI deduction, and the deduction does not reduce AGI. It reduces federal income tax only. It also does not carry to every state return; several states compute taxable income without it.
What to do next
- Pull last year's Form 8995 or 8995-A from your return. If it is blank and you had 1099 income, the deduction may have been missed — an amendable error worth real money.
- Project your 2026 taxable income and place yourself on the band: below $201,750/$403,500, inside, or above $276,750/$553,500.
- If you are below the band with 1099 income, confirm your tax software claims the deduction and move on. No entity, no fee, no further action.
- If you are inside the band, price the moves that lower taxable income — solo , , deductible cash-balance contributions — and have a CPA run the phase-out arithmetic both ways.
- If you are above the band as a practice owner in your fifties, get a cash-balance illustration from an actuary before the fourth quarter; the QBI resurrection in the worked example is age- and income-specific.
- Recheck the thresholds each January. They are inflation-indexed under a permanent statute, and the band you sit in is the entire analysis.
The QBI deduction rewards physicians who know exactly where their taxable income sits, and the protocol above works with or without us. This is education, not individualized financial advice.