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TaxdeductionsUnited States only

QBI Deduction Calculator

Section 199A qualified business income deduction. Below the income threshold it is simply twenty percent; above it, wage limits apply and service businesses lose it entirely.

Also called: section 199a calculator, pass through deduction.

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QBI deduction
$36,000.00

$36,000.00, worth $8,640.00 at your marginal rate. The base 20 percent would be $36,000.00, limited to $39,000.00 by the taxable income cap. Not a specified service business, so only the wage limitation applies above the threshold.

20 percent of QBI
$36,000.00
20 percent of taxable income
$39,000.00
W-2 wage limitation
$30,000.00
Tax saved
$8,640.00
Effective rate on business income
19.2%
On service businesses
Not a specified service business, so only the wage limitation applies above the threshold.
On the threshold
Taxable income is below the threshold, so no limitations apply.

Computed from the published rates for the tax year you selected, which is not necessarily the current year. A calculation, not tax advice, and it does not know anything about your circumstances beyond the figures entered.

Method and background

This is what the calculation gives for the numbers you entered. It is an estimate, not advice, and it knows nothing about your situation beyond those numbers. Rules for United States change on a published schedule; the effective date is shown on every rule-based tool.

How this is calculated

The deduction is twenty percent of qualified business income, capped at twenty percent of taxable income. Below the threshold that is the whole calculation. Above it, two things happen: the deduction becomes limited by W-2 wages the business pays, and a specified service trade or business, which covers most professional services, phases out entirely across the range above the threshold. That cliff makes taxable income management unusually valuable for professionals near the threshold.

twenty percent of business income, capped by twenty percent of taxable income and by wage limits above the threshold
QBI
Qualified business income

Worked examples

Each of these is asserted on every build. If a change to the engine ever moved one of these answers, the build would fail before the page could print it.

a non-service business below the threshold

Qualified business income
$180,000.00
Taxable income before this deduction
$195,000.00
W-2 wages paid by the business
$60,000.00
Phase-in threshold
$197,300.00
Phase-in range
$50,000.00
A specified service trade or business
No
Marginal rate
24%

QBI deduction$36,000.00

20% of 180,000, under the 39,000 income cap

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a service business above the threshold loses part of it

Qualified business income
$180,000.00
Taxable income before this deduction
$222,300.00
W-2 wages paid by the business
$60,000.00
Phase-in threshold
$197,300.00
Phase-in range
$50,000.00
A specified service trade or business
Yes
Marginal rate
24%

QBI deduction$18,000.00

boundary: halfway through the phase-out

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no business income means no deduction

Qualified business income
$0.00
Taxable income before this deduction
$195,000.00
W-2 wages paid by the business
$60,000.00
Phase-in threshold
$197,300.00
Phase-in range
$50,000.00
A specified service trade or business
No
Marginal rate
24%

QBI deduction$0.00

degenerate case

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Method and limits

What it assumes

  • A single business with the wage figure entered.

What it deliberately does not model

  • The unadjusted basis of qualified property provides an alternative limit not modelled here.
  • Aggregation rules across multiple businesses are not applied.
  • This is an estimate, not tax advice.

Formula version 1.0.0 · definition 1.0.0 · United States · Report a problem with this calculator

Frequently asked questions

What is a specified service trade or business?
Broadly, businesses where the principal asset is the reputation or skill of its people: health, law, accounting, consulting, financial services and similar. They lose the deduction above the threshold.
Why does income just above the threshold matter so much?
Because the phase-out is compressed into a narrow range. For a service business, a modest amount of extra income can remove the entire deduction.