SSTB vs Non-SSTB: How Specified Service Businesses Affect the QBI Deduction

If your QBI deduction shrank or vanished when your income went up, there is a good chance your business is a specified service trade or business. SSTB status is the §199A rule that treats some service businesses differently from everyone else. Below a certain income it does not matter at all. Above it, an SSTB loses the deduction entirely, while an identical non-SSTB can keep it. This guide explains which side of the line your business sits on, and why the line only bites at higher income.

What Is an SSTB?

A specified service trade or business is one where the product is essentially the skill or reputation of the people running it. The §199A rules name the fields directly:

• health (doctors, dentists, nurses, therapists)
• law
• accounting
• actuarial science
• performing arts
• consulting
• athletics
• financial services
• brokerage services
• investing and investment management
• trading or dealing in securities, partnership interests, or commodities

There is also a catch-all: any business whose principal asset is the reputation or skill of one or more of its owners or employees. That clause is narrower than it sounds. The regulations aim it mainly at endorsement income, licensing your name or likeness, and appearance fees, not at every business that happens to depend on a talented founder.

What Is Not Usually an SSTB?

Most ordinary operating businesses are not SSTBs, even profitable ones that lean on the owner:

• retail and e-commerce
• manufacturing
• construction and the trades
• restaurants and food service
• logistics and transportation
• most product businesses
• many software and product companies

A couple of fields people expect to be SSTBs are specifically carved out. Architecture and engineering are not SSTBs, even though they are professional services. The test is the listed field, not whether the work feels white-collar.

Why SSTB Status Matters

SSTB only changes your deduction once your taxable income climbs. There are three zones:

• Below the lower threshold, an SSTB qualifies for the full 20% deduction, exactly like any other business. The label is irrelevant here.
• Inside the phase-in range, the SSTB deduction is cut in proportion to how far into the range you are. Part of it survives.
• Above the upper threshold, the SSTB deduction is zero. The business is no longer a qualified trade or business for §199A.

A non-SSTB never hits that wall. Above the threshold it still faces the W-2 wage and property limits, but it can keep a deduction. The SSTB is the only one that can fall all the way to nothing purely because of what it does.

The 2026 Thresholds

From Rev. Proc. 2025-32, the 2026 §199A thresholds are:

These are taxable income numbers, not gross revenue. Your deductions, including the standard deduction, bring you down to the figure that actually matters here. For the mechanics behind the deduction itself, see our 2026 §199A QBI deduction guide, and for the full set of thresholds and phaseout ranges by filing status, our QBI income thresholds and phaseouts guide.

Example: A Consultant at $300,000 vs $1,000,000

Consulting is a listed SSTB field, so a solo consultant is a clean example. Same business, two income levels, filing jointly:

• At $300,000, taxable income lands below the $403,500 threshold. The SSTB rule does not apply, and the consultant gets the full deduction, roughly $50,469 in the calculator.
• At $1,000,000, taxable income is well above the $553,500 top of the range. The SSTB deduction is zero.

Nothing about the business changed. The same consulting work earns a five-figure deduction at one income and nothing at the other, purely because of the SSTB phaseout.

Common Edge Cases

Consultants vs software developers. Consulting, meaning advice and recommendations, is an SSTB. Building and selling software is generally not, because you are producing a product rather than advising clients. The gray zone is the developer who really bills for advice on what to build or buy. What you sell decides it, not your job title. We cover this in detail in Can Software Developers Claim QBI?.

Medical practices. Work in the field of health, where professionals provide services to patients, is an SSTB. Selling medical products or running a facility can fall outside it, depending on the facts.

Financial advisors and brokers. Financial services, brokerage, investment management, and wealth advice are all listed fields. That catches most planners, RIAs, and brokers.

Agencies. It depends on what the agency sells. A consulting or PR shop selling advice is usually an SSTB. An agency that produces a defined deliverable can sit closer to non-SSTB. Marketing agencies often land right on the fence.

Mixed service and product businesses. When a business has both SSTB and non-SSTB lines, the regulations look at the share of gross receipts. A small service component can fall under a de minimis rule and leave the whole business non-SSTB. A large one can taint the entire business. Clean books, and sometimes separate entities, are how owners keep the lines apart.

The reputation-or-skill clause. Do not read this one too broadly. It targets income from a name, image, likeness, endorsements, and appearance fees, not every business with a well-known founder.

How to Use the Calculator

The fastest way to see your SSTB exposure is to toggle it. In the QBI Entity Selection Calculator, flip Specified Service Trade or Business between Yes and No and watch the Total QBI deduction row.

The effect only appears at higher income. Take a consultant earning $1,000,000 who pays a $300,000 salary through an S-Corp. With SSTB set to Yes, the QBI deduction is $0. Flip it to No and the same numbers produce a $136,834 deduction, because a non-SSTB at that income still gets the W-2 wage-limited deduction. That $136,834 gap is the entire cost of the SSTB label at this income. If your deduction drops to zero while your income is high, SSTB phaseout is almost always the reason. You can also compare entities at that income in the entity comparison guide.

Frequently Asked Questions

Is consulting always an SSTB? Consulting is a listed field, so advice-based consulting usually is. The exception is when you are really selling a product or a defined deliverable rather than recommendations. What you sell controls it.

Is software development an SSTB? Usually no. Writing and selling software is producing a product, which is not a listed service field. It can drift toward SSTB if you mainly bill clients for advice on systems or strategy.

Can an SSTB claim QBI below the threshold? Yes. Below the lower threshold ($403,500 MFJ in 2026, $201,750 for most others), an SSTB gets the full 20% deduction like any business.

Does the $400 minimum save an SSTB above the upper threshold? No. A fully phased-out SSTB has no qualified business income, so there is nothing for the 2026 $400 active-business floor to apply to. The floor helps non-SSTBs that are merely wage-limited, not SSTBs past the top of the range.

What happens if my business has both service and non-service income? The regulations look at the SSTB share of gross receipts. A small service component can fall under a de minimis rule and leave the business non-SSTB. A large one can taint the whole thing. Clean books, and sometimes separate entities, are how owners keep them apart.

Sources

• IRS, Qualified Business Income Deduction
• IRS, About Form 8995-A and instructions
• Rev. Proc. 2025-32, 2026 inflation adjustments

This content is for educational purposes only. It is not legal or tax advice. Consult a qualified tax professional before making structural changes to your business.