SSTB status can erase the 20% QBI deduction for doctors, lawyers, and consultants above $201,750 single / $403,500 MFJ (2026). Here's who's on the list and who isn't.
Whether your business is a "specified service trade or business" (SSTB) decides whether high earners keep the 20% qualified business income deduction — one of the biggest deductions in small-business tax. The short version: if your taxable income is below $201,750 single / $403,500 married filing jointly for 2026, SSTB status doesn't matter — you get the deduction either way. Above those thresholds, SSTB owners see the deduction phase out and, past the phase-out range, disappear entirely, while non-SSTB owners merely shift to wage-and-property limits.
So the question "am I an SSTB?" is really only urgent for owners near or above the threshold — which is exactly where a lot of successful doctors, lawyers, and consultants sit. This post covers who's on the list, the gray areas ("consulting" is narrower than you think), and the planning levers if you're close to the line. For the full mechanics of the deduction itself, start with our pillar guide, The QBI Deduction Is Permanent.
The statute and regulations name these fields as SSTBs:
Just as important is who's not on the list: engineers and architects are explicitly excluded, a deliberate carve-out. Real estate agents, manufacturers, contractors, restaurateurs, e-commerce sellers, and software businesses selling products (rather than advice) are generally not SSTBs either. Rental real estate has its own qualification path — covered in our guide to the QBI safe harbor for rental properties.
For 2026, the taxable-income thresholds are $201,750 single / $403,500 MFJ, and the phase-in ranges are now $75,000 and $150,000 wide respectively. Three zones:
A concrete illustration of the stakes: a married physician couple with $400,000 of taxable income and $250,000 of practice profit sits just under the 2026 MFJ threshold — potentially a deduction of up to $50,000 (20% of the qualified income). The same couple at $560,000 of taxable income, past the top of the phase-out range, deducts nothing from the practice. Same medicine, same patients, roughly $50,000 of deduction hanging on which side of the range their taxable income lands.
Note the measuring stick is your taxable income — all income on the return, after deductions — not the business's profit. A modest practice plus a high-earning spouse's W-2 can push an SSTB owner over the cliff.
"Consultant" is the most over-claimed and over-feared word in QBI. For SSTB purposes, consulting means providing advice and counsel — recommendations a client then acts on. It does not include:
If your revenue mixes advice with execution, the composition matters, and so does how you contract and invoice. There are also de minimis rules: a business with only a small percentage of SSTB revenue may avoid the taint entirely — the details depend on the size of the business and the share of gross receipts. This is a facts-and-circumstances call worth documenting deliberately rather than deciding at filing time.
Because the cliff is measured by taxable income, an SSTB owner near the line has real control:
SSTB status only bites above $201,750 single / $403,500 MFJ of taxable income for 2026. Below that line, take the 20% and move on; near it, every retirement dollar and timing decision is leverage.
The SSTB rules are a targeted haircut, not a blanket ban: they strip the QBI deduction from high-income owners in named service fields, phase it out over $75,000/$150,000-wide ranges above the 2026 thresholds, and leave everyone below the line untouched. Know which side of the list you're on, read your own contracts before self-labeling as a "consultant," and manage taxable income deliberately in the borderline years.
Taxagon's CPAs and EAs run SSTB analyses and threshold planning for service-business owners every season through our tax planning service — if you'd rather not navigate it alone, reach out.
This article is general information, not tax advice for your specific situation. Tax law changes; figures are for the years stated.
Talk it through with a licensed US tax professional — we'll tell you honestly whether it applies to your situation.
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