The qualified business income (QBI) deduction lets many freelancers and other sole proprietors deduct up to 20% of their business income from their federal taxable income. Two things about it are easy to get wrong. It is usually worth less than 20% of your profit, and in the income range where it phases out, an extra dollar of profit can be taxed at far more than your bracket rate. This guide works both out for 2026 for a self-employed person with no other income, using the same calculation as the Self-Employment Tax Calculator.
What the deduction is
Under 26 U.S.C. § 199A the deduction is the lesser of two amounts: 20% of your qualified business income, and 20% of your taxable income (less net capital gain, which this guide ignores). For a sole proprietor, qualified business income is the profit on Schedule C less the deductible half of self-employment tax (26 CFR § 1.199A-3). It reduces income tax, not self-employment tax. The deduction was scheduled to expire after 2025; the 2025 budget act (Pub. L. 119-21) made it permanent, widened the income range over which its limits phase in for tax years beginning after 2025, and added a minimum deduction of $400 for owners who materially participate and have at least $1,000 of qualified income.
Why it is less than 20% of your profit
Your taxable income is lower than your profit: the standard deduction and half of your self-employment tax come off first, and the deduction cannot exceed 20% of what is left. With no other income, that second limit is the one that applies until the phase-out range. The IRS regulation's own first example has the same shape: $100,000 of qualified income but taxable income of $81,000 gives a deduction of $16,200, 20% of the taxable income (26 CFR § 1.199A-1(c)(3)). For a single filer in 2026:
| Net profit | QBI deduction | As a share of profit | Federal income tax saved |
|---|---|---|---|
| $30,000 | $2,356 | 7.9% | $236 |
| $50,000 | $6,074 | 12.1% | $729 |
| $80,000 | $11,650 | 14.6% | $2,183 |
| $120,000 | $19,084 | 15.9% | $4,199 |
| $180,000 | $30,237 | 16.8% | $7,257 |
| $230,000 | $39,876 | 17.3% | $9,570 |
At $80,000 of profit the deduction is $11,650, 14.6% of profit, and it saves $2,183 of federal income tax. The share climbs to about 17% by $230,000 because the standard deduction matters less and less. It never reaches 20%.
Where it phases out in 2026
The deduction is limited once taxable income (before the deduction) passes $201,750 for a single or head-of-household filer, or $403,500 on a joint return (IRS Revenue Procedure 2025-32, section 3.26). Above the threshold the deduction becomes subject to a limit based on the wages the business pays and the cost of its depreciable property, phased in over the next $75,000 ($150,000 joint). A freelancer with no employees and no depreciable property has a limit of zero, so the deduction shrinks steadily to nothing across that range; only the $400 minimum remains.
In terms of profit (no other income, standard deduction), the range runs from about $232,400 to about $308,400 for a single filer, and from about $453,200 to about $605,200 for a married couple filing jointly. A “specified service” business (health, law, accounting, actuarial science, performing arts, consulting, athletics, financial services, brokerage, investing or trading, or one whose main asset is the reputation or skill of its owners; 26 CFR § 1.199A-5) is reduced faster inside the range, and gets no deduction above it.
The hidden rate inside the range
Inside the range, each extra dollar of profit does two things: it is taxed at your bracket rate, and it moves you further through the range, which shrinks the deduction. At $300,000 of profit a single filer's deduction falls by about $0.73 for every extra dollar of profit (each dollar moves you further through the $75,000 range), so about $1.72 more taxable income results from one more dollar of profit, taxed at the 35% bracket. The table shows the federal income tax on the next $1,000 of profit (self-employment tax and state tax not included).
| Net profit | Deduction | Tax on the next $1,000 | Deduction, specified service | Tax on the next $1,000, specified service |
|---|---|---|---|---|
| $230,000 | $39,876 | $189 | $39,876 | $189 |
| $250,000 | $36,152 | $350 | $27,782 | $436 |
| $270,000 | $25,770 | $499 | $13,024 | $515 |
| $290,000 | $13,311 | $532 | $3,225 | $435 |
| $300,000 | $6,303 | $601 | $698 | $399 |
| $310,000 | $400 | $345 | $0 | $345 |
| $350,000 | $400 | $345 | $0 | $345 |
For a business that is not a specified service business the rate peaks at about 61% (around $307,000 of profit), against a 35% bracket, and falls back to about 34.5% once the deduction is gone. For a specified service business it peaks earlier, at about 56% (around $256,000), because its deduction is shrinking from two directions at once. The same shape appears for a joint return, at roughly twice the profit:
| Net profit | Deduction | Tax on the next $1,000 | Deduction, specified service | Tax on the next $1,000, specified service |
|---|---|---|---|---|
| $450,000 | $80,067 | $189 | $80,067 | $189 |
| $500,000 | $66,712 | $356 | $46,180 | $560 |
| $550,000 | $38,603 | $517 | $14,027 | $469 |
| $600,000 | $4,004 | $611 | $400 | $345 |
| $650,000 | $400 | $345 | $0 | $345 |
| $700,000 | $400 | $345 | $0 | $345 |
What this leaves out
- A business with employees, or with depreciable property such as equipment: its limit is not zero, so its deduction above the threshold can be much larger. Wages the business pays and the cost of qualified property both count.
- Any other income (a spouse's wages, investment income), the self-employed health insurance deduction and retirement plan contributions. All of them change taxable income and therefore where you sit in the range.
- Self-employment tax, which is not reduced by the deduction and which adds to the cost of an extra dollar of profit, and state income tax.
- More than one business, and whether your particular work counts as a specified service business, which is a question of fact under the regulation.
- Future changes to the law, and tax-year indexing: the thresholds above are for 2026 only.
This guide describes how the rules interact for one simple case. It is not a recommendation about how to run or report a business; your return or a tax professional can tell you what applies to you.
Sources
- 26 U.S. Code § 199A — Qualified business income (as amended in 2025: permanent, $75,000/$150,000 phase-in ranges, $400 minimum)
- IRS Revenue Procedure 2025-32 — the 2026 section 199A thresholds (section 3.26), tax brackets and standard deductions
- 26 CFR § 1.199A-1 — Operational rules, with the worked examples used to test the calculation here
- 26 CFR § 1.199A-3 — Qualified business income (the deductible half of self-employment tax reduces it)
- 26 CFR § 1.199A-5 — Specified service trades or businesses
- IRS Topic no. 554 — Self-employment tax