If you run a sole proprietorship, freelance business, partnership, or S-corporation, the Qualified Business Income deduction is likely the single largest tax break available to you — and it's also one of the most misunderstood, because the rules change sharply depending on your income level and what kind of business you run.
The Basic Mechanic
At its simplest, Section 199A lets you deduct 20% of your qualified business income from your taxable income. QBI is generally the net profit from your trade or business — Schedule C net profit for a sole proprietor, your share of partnership or S-corp business income — after subtracting the ordinary costs of running it. This deduction reduces taxable income directly; it isn't a credit, and it isn't limited to people who itemize. You can take the standard deduction and still claim QBI on top of it.
Below the income thresholds described next, the calculation really is that simple: take your qualified business income, multiply by 20%, and that's your deduction (subject to an overall cap of 20% of your taxable income minus net capital gains).
2026 Income Thresholds
Once your taxable income (calculated before the QBI deduction itself) crosses these thresholds, additional limitations start to apply:
| Filing Status | Phase-In Starts | Fully Phased In |
|---|---|---|
| Single / Head of Household | $201,750 | $276,750 |
| Married Filing Jointly | $403,500 | $553,500 |
The One Big Beautiful Bill Act (OBBBA) both made the QBI deduction permanent (it had been scheduled to expire) and widened this phase-in range — from $50,000/$100,000 to $75,000/$150,000 — giving business owners in the middle of the range more room before facing the full limitations described below.
The SSTB Distinction — This Is the One That Matters Most
The rules diverge sharply depending on whether your business is a "Specified Service Trade or Business" (SSTB). This category includes health, law, accounting, consulting, financial services, performing arts, athletics, and similar fields where the business's value comes primarily from the reputation or skill of its owners or employees.
- Below the phase-in threshold: SSTB status doesn't matter at all — everyone gets the full 20% deduction regardless of business type.
- Within the phase-in range: for SSTBs, the deduction phases out proportionally as you move through the range; for non-SSTBs, a wage/property limitation phases in instead (see below).
- Above the fully-phased-in threshold: SSTB owners lose the QBI deduction entirely on that business's income. Non-SSTB owners keep a deduction, but it's now capped by the wage/property limitation.
💡 Engineering and architecture are specifically carved out of the SSTB definition by statute — they get the more favorable non-SSTB treatment even though they're licensed professional services. Real estate agents and brokers are generally treated as non-SSTB too, though this area has been litigated and isn't always clean-cut.
The Wage/Property Limitation (Non-SSTB, Above the Threshold)
For non-SSTB businesses above the fully-phased-in threshold, the 20% deduction gets capped at the greater of:
- 50% of the W-2 wages the business paid, or
- 25% of W-2 wages plus 2.5% of the unadjusted basis of qualified property (UBIA — generally the original cost of depreciable business property like equipment or buildings)
This is why a solo consultant with no employees and no significant equipment can see their QBI deduction shrink toward zero once they're well above the threshold, while a business with substantial payroll or capital equipment keeps a meaningful deduction even at much higher income.
The New $400 Minimum Deduction (2026 and Later)
OBBBA added a new floor starting in 2026: if you actively participate in a qualified trade or business with at least $1,000 of QBI, you're guaranteed a minimum $400 deduction, even if the standard 20%-of-QBI calculation would produce less. This mainly helps very small or newly profitable businesses where 20% of a modest profit would otherwise be a token amount.
A Simple Example
A single freelance graphic designer (a non-SSTB — design isn't on the specified-service list) with $95,000 of Schedule C net profit and $95,000 of taxable income overall is well under the $201,750 threshold. No wage limitation applies at all. The deduction is simply 20% of $95,000 = $19,000, reducing taxable income to $76,000 before the standard deduction is even applied.
State Conformity Varies
Not every state follows the federal QBI deduction. California, New Jersey, and Pennsylvania are among the states that do not conform to Section 199A, meaning the deduction that shrinks your federal taxable income may not do the same for your state return. Check your specific state's treatment — don't assume the federal QBI deduction automatically carries over.
Aggregating Multiple Businesses
If you own stakes in more than one qualifying trade or business, you can elect to aggregate them under Treasury Regulation §1.199A-4, treating them as a single business for purposes of the wage/property limitation. This can help once you're above the threshold: a business with modest QBI but strong W-2 wages can be combined with a business that has strong QBI but little payroll, so the wage limitation is measured against the combined total rather than starving each business individually. Aggregation requires common ownership and other specific conditions, and once elected for a business, it generally has to be applied consistently in future years.
A Second Example: Above the Threshold
A married couple filing jointly runs an S-corp consulting business (a non-SSTB) with $500,000 of taxable income overall — solidly above the $403,500 phase-in start and into the range where the wage/property limitation applies. The business paid $120,000 in W-2 wages that year and has minimal qualified property. QBI from the business is $300,000, so 20% of QBI would be $60,000 — but the wage limitation caps it at the greater of 50% of W-2 wages ($60,000) or 25% of wages plus 2.5% of UBIA (roughly $30,000 here). In this case the two figures happen to land close together, so the deduction is capped right around $60,000 rather than being reduced further — but if that business had paid only $40,000 in wages instead, the 50%-of-wages cap would have limited the deduction to just $20,000, well below the uncapped 20%-of-QBI figure.
Common Questions
Does QBI apply to W-2 employees? No. QBI is only available on pass-through business income — Schedule C, partnership K-1s, S-corp K-1s, and certain REIT dividends and publicly traded partnership income. Regular W-2 wages, even from your own S-corp, don't count as QBI (that's precisely why the wage limitation uses W-2 wages as a separate yardstick rather than including them in QBI itself).
Do I need to itemize to claim QBI? No — it's available whether you take the standard deduction or itemize, and it's calculated on its own line separate from either.
Which form do I use? Form 8995 (simplified) if your taxable income is under the phase-in threshold for your filing status; Form 8995-A (with its worksheets for the wage/UBIA limitation and SSTB phase-out) if you're above it.
💡 This calculator's Self-Employment preset handles your SE tax and above-the-line SE tax deduction automatically, but doesn't yet model QBI itself — see our Methodology page. Run your self-employment numbers there first, then apply the 20% QBI calculation above by hand if you're below the threshold.