2026 QBI Deduction for Doctors, Lawyers and Consultants: SSTB Phaseout and Planning Limits

The 20% Qualified Business Income (QBI) deduction under Section 199A is one of the most valuable tax breaks available to pass-through business owners, sole proprietors, S-corp shareholders, and partnership members. Its dollar value depends on eligible QBI, taxable income, filing status, marginal rate and the limits below. There is no typical amount to assume for a service business.

There's a catch. For owners of Specified Service Trades or Businesses (SSTBs), defined by specified fields and a narrowly defined reputation/skill category in the regulations, the deduction phases out completely above income thresholds. In 2026, those thresholds are:

These are 2026 values from IRS Revenue Procedure 2025-32, section 4.26. They are taxable-income tests, not business-revenue thresholds. Within the range, the SSTB restriction phases in; above its upper bound, SSTB income supplies no QBI deduction. Other businesses may still have their own eligibility and wage/property limits.

The useful planning question is how a proposed contribution or entity choice changes both taxable income and eligible QBI. The following four topics are checks to run with your tax adviser, not guarantees of restored deductions.

What the IRS counts as an SSTB

The Section 199A regulations spell it out. SSTBs include:

• Health: physicians, dentists, veterinarians, pharmacists, nurses, physical therapists, psychologists
• Law: lawyers, paralegals, mediators, arbitrators
• Accounting: accountants, enrolled agents, return preparers
• Actuarial science
• Performing arts: actors, musicians, directors
• Consulting: management consultants, IT consultants paid for advice and counsel rather than implementation or programming, financial advisors providing advice
• Athletics: athletes, coaches
• Financial services: investment management, wealth management, brokerage services
• Brokerage services
• Investing and investment management
• Trading or dealing in securities, partnership interests, or commodities
• The defined reputation/skill category: principally income from endorsements, licensing an individual's identity, and appearance fees; it is not a rule that every skilled owner makes a business an SSTB

What is NOT an SSTB:

• Engineering and architecture (specifically excluded by statute)
• Real estate (rental real estate, brokerage of real estate, REITs)
• Insurance agents and brokerage (excluded from brokerage services under the final Treasury regulations, not the statutory engineering and architecture exclusion)
• Manufacturing
• Construction and trades (HVAC, plumbing, electrical, etc.)
• Most retail and product businesses
• Software-as-a-service (revenue from providing the platform, rather than advice or consulting services)

This is critical: construction, trades and manufacturing are not generally SSTBs merely because of their industry. High-income owners still face wage/property and other QBI limits. The phaseout primarily affects professional services.

The math: what the deduction is actually worth

Eligible QBI is not automatically the owner's distributions or book profit. Owner wages, certain investment income and other exclusions matter. The deduction also has a taxable-income/net-capital-gain limitation.

Illustrative sensitivity: $100K of additional eligible QBI can support up to a $20K deduction before the other limits. At an assumed 32% marginal federal rate that is $6,400, not $20K of cash savings. Compute the actual return both ways; state conformity and marginal brackets require their own year-specific checks.

Workaround 1: Reduce taxable income below the threshold

The most direct approach: reduce your taxable income enough to fall back below the SSTB phaseout threshold. That removes the SSTB limitation, but the deduction is still subject to the taxable-income limit and the QBI actually remaining after the change. Whether it is worth doing depends on the recomputed return. A deduction that lowers taxable income can also lower QBI, and deferred money still has to be funded in cash.

Tools available:

• Review retirement contributions: employer and employee limits, age, compensation and plan design determine the allowable amount. A cash balance plan requires actuarial funding and staff-cost analysis, see our cash balance plan guide
• HSA contributions if you have a high-deductible health plan: $4,400 self-only / $8,750 family in 2026, subject to eligibility, coverage periods and contributions already made (IRS 2026 HSA procedure)
• Defined benefit plan: the deductible contribution is actuarially determined from age, compensation, plan formula and staff coverage. The 2026 section 415(b) figure of $290,000 limits the annual benefit, not the annual contribution, so do not assume a fixed deductible amount (IRS 2026 COLA table)
• State tax payments: model the applicable SALT limitation and state/entity rules; paying earlier does not automatically create an additional federal deduction
• Charitable giving via a Donor Advised Fund: bunch multiple years of contributions into one tax year. This only lowers taxable income if you itemize, and it is subject to AGI percentage limits and the current-year itemized deduction rules your adviser applies

A contribution that moves taxable income below the phaseout can help, but deductible self-employed retirement contributions can also reduce QBI. Do not add a full retirement tax benefit to an unchanged QBI benefit without recomputing both. Model employee coverage costs, contribution commitments, available cash and marginal brackets alongside the deduction.

The comparison to ask for is a return calculation before and after the contribution, with separate lines for taxable income before QBI, adjusted QBI, the applicable percentage and the final limited deduction. A contribution is deferred money in a plan, not a cost-free tax saving.

Workaround 2: Split the business into SSTB and non-SSTB components (carefully)

Distinct activities can receive different treatment, but a second LLC is not enough. Under the final Treasury regulations, section 1.199A-5(c)(2) (also published as T.D. 9847), the portion supplying property or services to an SSTB with 50% or more common ownership is treated as an SSTB for the related owners. Direct and indirect related-party ownership count.

That defeats the simple versions of these arrangements:

• Medical practice paying a commonly owned imaging-equipment entity.
• Law firm paying rent to a commonly owned property entity.
• Dental practice leasing equipment from its owners' separate LLC.

A genuinely separate non-SSTB activity serving unrelated customers needs an analysis of the actual revenue portions, ownership and business facts. Economic substance and separate books help explain the operation, but they do not override the common-ownership rule. Have an experienced tax adviser apply the final regulation before assigning rental or leasing income to non-SSTB QBI.

Workaround 3: C-corp election for some or all of the business

For some high-income SSTB owners, a C-corp election merits a separate long-term model. It does not restore a Section 199A deduction, which C corporations do not claim. C-corps are subject to a flat 21% federal tax rate at the entity level, significantly lower than the 37% top individual rate that applies to pass-through income.

When this works:

• Owner is comfortable leaving most profit in the company (not distributing as personal income)
• Profits will be reinvested in growth, equipment, or hiring
• Owner has additional income sources to fund personal lifestyle
• Exit planning has been modeled for both asset and stock sales. Section 1202 generally excludes health, law, accounting, consulting and other listed service fields targeted by this article; do not assume QSBS eligibility from a C-corp election

When this doesn't work:

• Owner needs to take all profit as personal income (double taxation: 21% corporate + dividend tax on distribution = often higher total than pass-through)
• State taxes vary substantially (California's 8.84% corporate rate stacks unfavorably)
• The old 35% personal-service corporate rate is superseded; the federal corporate rate is generally 21%, with shareholder-level tax and other restrictions still relevant

Compare retained earnings, reasonable owner compensation, dividends, state taxes, benefit rules, accumulated-earnings exposure and the eventual exit. Use the same owner cash requirement in both models. A lower entity tax rate alone does not prove a lower lifetime combined tax burden. See IRS Publication 542 for the corporate tax framework and IRC section 1202 for qualified-business exclusions.

Workaround 4: Wage and basis maximization (above-threshold partial deduction)

For an eligible non-SSTB business above the threshold, the QBI deduction can be limited by W-2 wages or qualified property basis. The deduction at high income is capped at the greater of:

• 50% of W-2 wages paid by the business, OR
• 25% of W-2 wages + 2.5% of unadjusted basis in qualified property

For SSTBs above the phaseout, this cap calculation reduces to zero, no SSTB QBI is deductible at high income, period. So this lever doesn't help SSTBs.

But for owners with multiple businesses (some SSTB, some non-SSTB), the wage/basis math matters for the non-SSTB component. Model W-2 compensation, distributions and qualified property with your adviser before changing the non-SSTB QBI calculation. Additional owner wages reduce QBI, must satisfy reasonable-compensation standards and can affect the wage limitation; qualified-property UBIA depends on placed-in-service dates and depreciable periods, not purchase timing alone.

Three things to do this quarter

If you're an SSTB owner above the phaseout (or close to it):

Action 1: Calculate your projected 2026 taxable income with current contribution levels. Compare your filing-status-specific phaseout with projected taxable income. Recompute QBI and cash commitments before calling an additional contribution worthwhile.

Action 2: If projected taxable income is further above the upper phaseout than any contribution you could realistically fund, the SSTB benefit may be out of reach. In that case, evaluate cash balance plan eligibility on its own merits rather than as a QBI fix. Recompute the final return rather than assuming a combined 40-50% saving; a contribution may reduce QBI and may require staff contributions.

Action 3: If your business has obvious non-SSTB components (equipment, real estate, related-but-separate services), consult an EA or tax attorney about whether its income remains SSTB under the common-ownership rule, as well as the economic-substance and other eligibility tests.

Bring your adviser a single ownership chart, current-year income forecast, owner compensation, retirement plan proposal and property/service revenue split. Those inputs let them test the law against your business rather than sell an entity structure around a headline threshold.

Find your gap in 2 minutes or book a free 30-min audit to organize the inputs above (ownership chart, income forecast, owner compensation and plan proposal) before your tax adviser models the phaseout.

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