Free QBI Deduction Calculator (2026)

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The Qualified Business Income (QBI) deduction, also known as the Section 199A deduction, allows eligible self-employed individuals and small business owners to deduct up to 20% of their qualified business income from their taxes. Use our free QBI deduction calculator to estimate your 2026 deduction, navigate the complex income thresholds and SSTB phase-outs, and see exactly how much you will save on your federal income taxes.

free qbi deduction calculator

Free QBI Deduction Calculator

Estimate your 2026 Section 199A deduction and tax savings


Net profit from your pass-through business (Sole Prop, LLC, S-Corp, Partnership)

$

Includes all income sources (business, W-2, spouse, investments) minus standard/itemized deductions

$

Enter amount if you have capital gains included in your taxable income above

$

SSTBs include health, law, accounting, consulting, financial services, and performing arts.


Required if your taxable income exceeds the threshold. Enter 0 if sole prop with no employees.

$

Unadjusted basis of tangible depreciable property used in the business

$

How This Free QBI Deduction Calculator Works

Step 1: Enter Your Filing Status and Income

The QBI deduction is highly dependent on your total taxable income and filing status because the IRS applies phase-out thresholds. This free QBI deduction calculator uses 2026 projected thresholds to determine if your deduction is limited by your income level.

Step 2: Input Your Qualified Business Income (QBI)

Enter the net profit from your pass-through business. QBI generally includes your Schedule C net profit, S-Corp K-1 income, or Partnership K-1 income, minus any self-employment tax deductions, self-employed health insurance, and retirement plan contributions.

Step 3: Identify if You Are an SSTB

Specified Service Trades or Businesses (SSTBs) face strict phase-out rules once income exceeds the threshold. If you are a doctor, lawyer, accountant, consultant, or financial advisor, select “Yes” so the calculator can apply the correct SSTB reduction formulas.

Step 4: Add W-2 Wages and UBIA (If Applicable)

If your taxable income exceeds the threshold, non-SSTB deductions are limited by the W-2 wages your business pays and the unadjusted basis of qualified property (UBIA). Enter these values to ensure your deduction is calculated accurately under the Section 199A limitation rules.

Step 5: Review Your Results and Tax Savings

The calculator outputs your final allowable QBI deduction, shows exactly which limitation (if any) reduced your deduction, and estimates your federal tax savings based on your marginal tax bracket.

Frequently Asked Questions

What is the QBI deduction for 2026?

The QBI deduction allows eligible taxpayers to deduct up to 20% of their qualified business income from a pass-through entity. For 2026, the full deduction is available if your taxable income is below the projected thresholds of approximately $203,200 for single filers and $406,400 for married filing jointly. Use our free QBI deduction calculator to find your exact allowable amount.

What is a Specified Service Trade or Business (SSTB)?

An SSTB is any trade or business involving the performance of services in the fields of health, law, accounting, actuarial science, performing arts, consulting, athletics, financial services, or brokerage services. If your business is an SSTB and your income exceeds the upper phase-out limit, your QBI deduction is reduced to zero.

How does the W-2 wage limitation work?

If your taxable income exceeds the threshold, your QBI deduction cannot exceed the greater of: (1) 50% of the W-2 wages paid by your business, or (2) 25% of the W-2 wages plus 2.5% of the unadjusted basis immediately after acquisition (UBIA) of all qualified property. This limitation phases in over a $50,000 range for single filers and a $100,000 range for joint filers.

Does the QBI deduction reduce self-employment tax?

No. The QBI deduction is strictly a federal income tax deduction. It does not reduce your net earnings subject to self-employment tax (Social Security and Medicare). It is taken “below the line” on Form 1040, meaning it reduces your taxable income but not your adjusted gross income (AGI).

Can I claim the QBI deduction if I take the standard deduction?

Yes. The QBI deduction is available regardless of whether you itemize your deductions or take the standard deduction. It is calculated separately and applied after your standard or itemized deduction has already reduced your AGI to arrive at your taxable income.

Is the QBI deduction permanent?

No. The QBI deduction was created by the Tax Cuts and Jobs Act (TCJA) of 2017 and is currently scheduled to sunset (expire) after December 31, 2025, unless Congress passes legislation to extend it. If it expires, the tax code will revert to pre-2018 rules. Always consult a tax professional for the most current legislative updates.

Do S-Corp owners qualify for the QBI deduction?

Yes, S-Corp shareholders can qualify for the QBI deduction based on the pass-through income reported on their Schedule K-1. However, QBI does not include the “reasonable compensation” (W-2 salary) the S-Corp pays to the shareholder. Only the remaining profit distributions qualify as QBI. This is a key difference from sole proprietors, whose entire net profit (minus adjustments) qualifies.

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Understanding the Qualified Business Income (QBI) Deduction

The Qualified Business Income (QBI) deduction, established under Section 199A of the Internal Revenue Code by the Tax Cuts and Jobs Act (TCJA) of 2017, represents one of the most significant tax breaks available to self-employed individuals, freelancers, and small business owners. By allowing eligible taxpayers to deduct up to 20% of their qualified business income, the provision was designed to provide pass-through entities with a tax benefit comparable to the reduced 21% corporate tax rate granted to C-corporations.

For 2026, the basic premise remains straightforward: if your taxable income is below the threshold (projected at roughly $203,200 for single filers and $406,400 for married couples filing jointly), you simply calculate 20% of your QBI and deduct it from your taxable income. However, once your income exceeds these thresholds, the calculation becomes significantly more complex, introducing W-2 wage limitations, property basis limitations, and strict phase-outs for Specified Service Trades or Businesses (SSTBs). This is why using a reliable free QBI deduction calculator is essential for accurate tax planning.

The W-2 Wage and UBIA Limitations

When a non-SSTB taxpayer’s income exceeds the threshold, the IRS limits the QBI deduction to prevent high-income earners from claiming massive deductions without actually creating jobs or investing in physical assets. The deduction cannot exceed the greater of two amounts: 50% of the W-2 wages paid by the business, or 25% of the W-2 wages plus 2.5% of the unadjusted basis of qualified property (UBIA). For a solo consultant with no employees and no significant equipment, the W-2 wage limit could reduce their QBI deduction to zero once they cross the upper phase-out limit. Conversely, a manufacturing business with heavy machinery and a large payroll will easily satisfy these limitations.

The SSTB Phase-Out Rules

Specified Service Trades or Businesses (SSTBs) face the strictest rules under Section 199A. If you operate an SSTB — such as a medical practice, law firm, accounting firm, or consulting agency — and your taxable income exceeds the upper limit of the phase-in range (threshold + $50,000 for single / +$100,000 for MFJ), your QBI deduction is entirely eliminated. There is no W-2 or UBIA workaround for SSTBs at high income levels. If you are in the phase-in range, the free QBI deduction calculator will proportionally reduce your allowable deduction based on exactly how far your income exceeds the base threshold.

Strategic Planning and the 2025 Sunset

Because the QBI deduction is currently scheduled to expire at the end of 2025, 2026 tax planning requires careful attention to legislative updates. If Congress does not extend the provision, the tax code will revert to pre-TCJA rules, effectively eliminating the 20% deduction. Business owners should work closely with a CPA to maximize this deduction while it remains available, potentially by accelerating income, adjusting W-2 wages in an S-Corp, or making strategic equipment purchases to increase UBIA. For official IRS guidance on qualifying trades and calculation worksheets, refer to the IRS Section 199A QBI Deduction FAQs.

Additionally, understanding how the QBI deduction interacts with other deductions — like the self-employment tax deduction and self-employed health insurance deduction — is crucial. These “above-the-line” deductions actually reduce your QBI, which in turn slightly reduces your 20% QBI deduction. For a comprehensive overview of how pass-through income is taxed, review the IRS Qualified Business Income Deduction overview page. Running a free QBI deduction calculator before year-end ensures you understand exactly how these moving parts affect your final tax liability.

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