The QBI Deduction for Physician Practices: What You Can Actually Claim

Physicians with taxable income below $201,750 (single) or $403,500 (MFJ) qualify for the full 20% QBI deduction in 2026, regardless of practice size — contrary to the common assumption that doctors can’t claim it at all. The Section 199A qualified business income (QBI) deduction was designed to give pass-through business owners a tax benefit comparable to the rate reduction corporations received from the 2017 Tax Cuts and Jobs Act, but above that threshold, the story gets more complicated.

Medicine is classified as a Specified Service Trade or Business (SSTB) — which means the deduction phases out as taxable income rises above certain thresholds. Many physicians assume this means they cannot claim the deduction at all. That assumption is often wrong, and the error is expensive.

How Does the Baseline QBI Deduction Rule Work?

The QBI deduction allows qualifying business owners to deduct up to 20% of qualified business income from their pass-through entities — S-corps, partnerships, or sole proprietorships. If your physician practice generates $300,000 in QBI and you qualify for the full deduction, you save 20% × $300,000 = $60,000 in taxable income. At a 37% marginal rate, that is $22,200 in federal income tax.

For non-SSTB businesses, the deduction is broadly available below the income thresholds. For SSTB businesses like medical practices, the deduction phases out — and disappears entirely at the top of the phase-out range.

What Are the 2026 SSTB Phase-Out Thresholds?

For 2026, the SSTB phase-out thresholds are:

Below the lower threshold: Full 20% deduction available. No SSTB limitation applies.

Within the phase-out range: Partial deduction available. The deduction percentage is reduced proportionally across the $75,000 ($150,000 MFJ) phase-out range.

Above the upper threshold: The SSTB deduction is zero. No QBI deduction from the medical practice.

What “taxable income” means here: The thresholds apply to your total taxable income before the QBI deduction — W-2 wages, K-1 distributions, investment income, everything. Not just practice income.

Why Is the QBI Phase-Out Not a Cliff?

This is the most important point most physicians miss: the phase-out is proportional, not binary. A physician with $230,000 in taxable income (single) does not lose the entire deduction at $201,751. They are 28,250/75,000 = 37.7% through the phase-out range, so they lose 37.7% of the SSTB deduction and retain 62.3%.

At $230,000 taxable income, single, with $180,000 in QBI:

• Full deduction would be: $180,000 × 20% = $36,000
• Phase-out reduction: $36,000 × 37.7% = $13,560
• Remaining QBI deduction: $36,000 − $13,560 = $22,440

$22,440 in deduction at 37% marginal rate = $8,303 in saved tax. Not the full $13,320 you would have had below the threshold — but not zero either.

How Can Retirement Contributions Restore Your QBI Deduction?

Here is where the planning opportunity exists: taxable income is the threshold variable, and retirement contributions reduce taxable income.

A physician with $450,000 in taxable income (MFJ) is $46,500 into the phase-out range. The QBI deduction is roughly 31% phased out, leaving 69% available. A $100,000 cash balance plan contribution reduces taxable income to $350,000 — now $53,500 below the bottom of the phase-out range, and the full QBI deduction is restored.

At 20% of $350,000 in QBI = $70,000 QBI deduction. At 37% marginal rate: $25,900 in federal tax savings from the QBI deduction alone — on top of the $37,000 directly saved by the retirement deduction itself. The total tax impact of that $100,000 contribution is not $37,000 at the marginal rate; it is $37,000 + $25,900 = $62,900, because restoring the QBI deduction is a second-order benefit.

This is why retirement planning and QBI planning cannot be evaluated in isolation. Physician practice retirement account options covers what vehicles are available and what contribution levels are achievable by age.

How Does the W-2 Wage Limitation Affect Your QBI Deduction?

There is a second constraint on the QBI deduction that applies above the phase-out thresholds — and also functions as a partial limiter within the phase-out range for high-income taxpayers who retain partial deductions.

The deduction cannot exceed the greater of:

1. 50% of W-2 wages paid by the business, or
2. 25% of W-2 wages plus 2.5% of the unadjusted basis of qualified property

For a physician S-corp where you are the only employee, your W-2 salary is the only wage base. At a $230,000 salary, the W-2 wage limitation is $115,000 (50% of wages). If your QBI deduction would otherwise be limited to less than $115,000, the W-2 wage test is not the binding constraint — the 20%-of-QBI limit is.

Where this matters: A physician paying themselves a very low salary to minimize payroll taxes can inadvertently create a W-2 wage limitation problem. The salary optimization calculation accounts for this — the right salary balances payroll tax minimization against W-2 wage floor for the QBI deduction.

How Does the S-Corp Election Affect Your QBI Deduction?

A sole proprietor or single-member LLC taxed as a disregarded entity reports QBI on Schedule C. An S-corp reports QBI as the net income flowing through the K-1 — after your W-2 salary is already deducted. Your S-corp salary does not qualify for QBI; only the distribution/K-1 income does.

This means an S-corp owner’s QBI is generally lower than a Schedule C owner’s QBI on the same gross income, because the salary reduces the pass-through income. However, the S-corp also produces the W-2 wage base that satisfies the W-2 wage limitation — so the S-corp structure typically works in your favor on the QBI calculation above the phase-out range, where the wage test matters.

Below the phase-out range: the entity choice does not affect whether you qualify for QBI. You qualify regardless.

Which Physicians Actually Qualify for the QBI Deduction?

Contrary to the “physicians can’t take the QBI deduction” shorthand you sometimes hear:

Physicians who definitely qualify (in 2026):

• Single with total taxable income below $201,750
• MFJ with total taxable income below $403,500
• Anyone in those income ranges, regardless of practice size

Physicians who may partially qualify:

• Single with taxable income $201,750–$276,750
• MFJ with taxable income $403,500–$553,500
• Higher-income physicians who can reduce taxable income below the thresholds through retirement contributions

Physicians who do not qualify:

• Single above $276,750 in taxable income (after retirement deductions and all other adjustments)
• MFJ above $553,500 in taxable income (after all deductions)

The key insight: the thresholds apply to taxable income, not gross income or practice revenue. Aggressive but legitimate retirement contributions can move physicians from the “does not qualify” category to the “partially qualifies” or “fully qualifies” category — sometimes recovering tens of thousands of dollars in annual tax savings.

What Should Your CPA Be Doing About the QBI Deduction?

If you have a physician practice and your CPA has told you “you can’t take the QBI deduction because you’re a doctor” without a more specific analysis, you may be leaving money on the table.

The right analysis:

1. Calculate your projected taxable income for the year
2. Identify your position relative to the SSTB thresholds
3. Model the impact of available retirement contributions on taxable income
4. Calculate the QBI deduction at the optimized income level
5. Set S-corp salary to satisfy the W-2 wage floor while minimizing total payroll tax

This is a planning exercise that should happen in Q3 or early Q4 — not at filing time, when it is too late to adjust retirement contributions or salary.

The QBI deduction expires after 2025 unless Congress extends it. For the years it is available, it is one of the largest single deductions available to physician practice owners — and one of the most commonly miscalculated.