Tax Tools
QBI Deduction Calculator
Estimate your Section 199A Qualified Business Income deduction for tax year 2025 or 2026. Handles the SSTB phase-out, the W-2 wage limit, and the Idaho state-tax layer. Takes about a minute.
Federal / IRS
IRS Resources
Your Numbers
Entered for context only; QBI above should already exclude this.
Only matters above the income threshold.
Optional. Leave blank if you don't track this.
Idaho conforms to federal taxable income, so the QBI deduction reduces Idaho tax as well.
Estimated QBI Deduction
$0
Section 199A pass-through deduction
Estimated Federal Tax Savings
$0
Deduction times your estimated federal marginal rate.
Estimated Idaho Tax Savings
$0
Deduction times Idaho's 5.3% flat rate.
| Calculation step | Amount |
|---|---|
| Tentative deduction (20% of QBI) | – |
| After SSTB phase-out ? | – |
| After W-2 wage limit ? | – |
| Taxable-income cap (20% of taxable income) ? | – |
| Final QBI deduction | – |
A note on this estimate: Section 199A is one of the more layered provisions in the Internal Revenue Code. This calculator covers the common path, the SSTB phase-out, the W-2 wage limit, and the overall taxable-income cap. It does not model net capital gains, REIT or PTP dividend components, aggregation elections, loss carryforwards, the new 2026 $400 minimum deduction floor, or state add-backs in non-conforming states. A conversation with your CPA turns the estimate into the real number on your return.
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