The QBI Deduction Explained: How to Claim Your 20% Pass-Through Tax Break
If you run a business as a sole proprietor, LLC, S corporation, or partnership, the federal government gives you a powerful tax break that many business owners either overlook or misunderstand. The Qualified Business Income (QBI) deduction—also known as the Section 199A deduction—lets eligible pass-through business owners deduct up to 20% of their qualified business income from their taxable income. That's a significant reduction that can save thousands of dollars each year.
But the QBI deduction comes with rules, income limits, phase-outs, and exceptions that can make it confusing. This guide breaks it all down so you know exactly what qualifies, how to calculate your deduction, and how to maximize what you keep.
What Is the QBI Deduction?
Introduced by the 2017 Tax Cuts and Jobs Act, the QBI deduction allows owners of pass-through businesses to deduct up to 20% of their qualified business income. Unlike a business expense deduction, this deduction applies to your personal income tax return—it reduces your taxable income even if you take the standard deduction.
The deduction was originally set to expire in 2025, but the One Big Beautiful Bill Act (passed in July 2025) made it permanent, giving business owners long-term certainty to plan around this benefit.
Who Qualifies for the QBI Deduction?
The QBI deduction is exclusively for pass-through business owners. That means:
- Sole proprietors (Schedule C filers)
- Single-member LLCs (taxed as sole proprietors)
- Partnerships and multi-member LLCs
- S corporation shareholders
- Trust and estate beneficiaries with qualifying income
C corporations do not qualify—they pay corporate income tax separately and aren't eligible for this deduction.
What Counts as Qualified Business Income?
Qualified Business Income (QBI) is the net income from your trade or business, calculated before the deduction itself. However, not all income counts:
QBI includes:
- Net profits from your business operations
- Self-employment income from your trade or business
QBI excludes:
- Capital gains and losses
- Dividend income
- Interest income (unless it's business-related)
- Income earned outside the U.S.
- Wages paid to yourself as a W-2 employee of your S corporation
- Reasonable compensation for services performed
Income Thresholds and Phase-Outs
Your eligibility for the full QBI deduction depends on your taxable income. The rules differ between regular businesses and Specified Service Trade or Businesses (SSTBs).
2025 Income Thresholds
For 2025, the phase-out begins at:
| Filing Status | Phase-Out Begins | Phase-Out Ends |
|---|---|---|
| Single / Head of Household | $197,300 | $247,300 |
| Married Filing Jointly | $394,600 | $494,600 |
If your taxable income falls below the lower threshold, you can claim the full 20% deduction regardless of business type. Above the upper threshold, the rules get more complex.
2026 Expanded Phase-Out Ranges
Starting in 2026, the phase-out range widens:
- Married Filing Jointly: Phase-out from $394,600 to $544,600 (a $150,000 range vs. the old $100,000)
- All other filers: Phase-out from the lower threshold to $75,000 above it (vs. the old $50,000)
This means more taxpayers in the phase-out zone can still claim a partial deduction.
Specified Service Trades or Businesses (SSTBs): The Big Exception
If you run a service business that relies heavily on your personal skills or reputation, you may be operating what the IRS calls a Specified Service Trade or Business (SSTB). SSTBs face additional restrictions.
SSTBs include:
- Law firms and attorneys
- Medical and dental practices
- Accounting and financial advisory firms
- Consulting businesses
- Investment management
- Athletic performance businesses
- Financial services
Not SSTBs include:
- Architects and engineers (specifically excluded from SSTB rules)
- Real estate professionals
- Insurance agents
- Contractors and tradespeople
- Restaurants and retail businesses
- Technology companies
If you're an SSTB owner whose income exceeds the upper phase-out threshold, your QBI deduction is completely eliminated. But if your income falls below the lower threshold, you get the full 20% deduction just like any other business.
W-2 Wage and Property Limitations
Once your taxable income exceeds the lower threshold (even for non-SSTB businesses), the QBI deduction may be limited based on W-2 wages and business property. Your deduction is capped at the greater of:
- 50% of W-2 wages paid by your business, or
- 25% of W-2 wages + 2.5% of the unadjusted cost of qualified depreciable business property
This limitation phases in gradually within the income range and fully applies above the upper threshold.
Example: How Wage Limitations Work
Suppose you're married filing jointly with $600,000 in taxable income and $200,000 in QBI from your non-SSTB business. Your business pays $60,000 in W-2 wages and has no significant depreciable property.
- 20% of QBI = $40,000
- 50% of W-2 wages = $30,000
Your deduction is limited to $30,000—not $40,000—because you've exceeded the income threshold and the wage test applies.
How to Calculate Your QBI Deduction
Here's a simplified step-by-step:
Step 1: Determine your business type Is it an SSTB or a regular trade or business? This affects whether you'll eventually hit a complete phase-out.
Step 2: Calculate your total taxable income This is your income after all deductions except the QBI deduction itself (including the standard or itemized deduction).
Step 3: Are you below the lower threshold? If yes, your deduction is simply 20% of QBI (or 20% of taxable income minus net capital gains, whichever is lower). Stop here.
Step 4: Apply phase-in rules If you're within the phase-out range, calculate your partial deduction. The phase-in is proportional—the closer you are to the upper threshold, the smaller the benefit.
Step 5: Apply W-2 wage/property limitations If you're above the lower threshold and own a non-SSTB, calculate both the 50% W-2 wage test and the 25% W-2 + 2.5% property test, then use the higher number as your cap.
Step 6: File Form 8995 or Form 8995-A Simple situations use Form 8995. More complex scenarios (SSTBs, multiple businesses, aggregation elections) use Form 8995-A.
The New $400 Minimum Deduction (2026)
Starting in 2026, there's a new minimum QBI deduction: if your qualified business income is at least $1,000 and you materially participate in the business, you're guaranteed at least a $400 deduction—even if SSTB phase-outs or wage limitations would otherwise reduce it to zero or near-zero.
This provision provides a floor for business owners near the top of the income range who might otherwise lose the deduction entirely.
Strategies to Maximize Your QBI Deduction
1. Elect S Corporation Status
If you operate as a sole proprietor with no employees and your income is approaching the threshold, converting to an S corporation can help. By paying yourself a reasonable W-2 salary, your business creates W-2 wages—which increases your wage limitation cap. The remaining profit passes through as a distribution, which qualifies for the QBI deduction.
2. Aggregate Multiple Businesses
If you own multiple qualifying businesses, you may be able to elect to aggregate them under Section 199A. Aggregation combines the QBI, W-2 wages, and property values from all businesses, which can significantly increase your wage/property limitation and preserve a larger deduction.
3. Invest in Qualified Property
The 2.5% property component of the limitation test rewards businesses with significant tangible assets. If you're near the threshold and own equipment, machinery, or real estate used in the business, those assets raise your deduction ceiling.
4. Manage Your Taxable Income
Since the QBI deduction eligibility hinges on taxable income (not gross income), strategies that reduce taxable income can keep you below the threshold. Consider:
- Maximizing retirement plan contributions (SEP-IRA, Solo 401k, SIMPLE IRA)
- Timing income recognition and deductions
- Increasing qualified property depreciation with Section 179 or bonus depreciation
5. Separate SSTB and Non-SSTB Activities
If your business performs both service and non-service activities, the IRS has rules about when those activities are treated as separate businesses. Proper business structure can potentially preserve a QBI deduction for the non-SSTB portion.
Common QBI Deduction Mistakes
Forgetting about the taxable income cap: The deduction can't exceed 20% of your taxable income (minus net capital gains). High deductions elsewhere can actually reduce your QBI deduction.
Not aggregating multiple businesses: Multi-entity owners who don't file an aggregation election often leave a larger deduction unclaimed because they miss the chance to combine W-2 wage bases.
Assuming SSTB owners can't claim the deduction: Professionals like doctors, lawyers, and consultants with income below the lower threshold can claim the full 20% deduction. Only those above the threshold are phased out.
Mixing up QBI and gross revenue: QBI is net income from the business, not your top-line revenue. Deducting business expenses first will reduce your QBI.
Simplify Your Business Finances
Understanding your QBI deduction is just one piece of managing your business tax picture. Accurate, up-to-date financial records are essential for calculating your QBI correctly, tracking W-2 wages, and documenting qualified property values.
Beancount.io offers plain-text accounting that gives you complete transparency and control over your financial data—making it easy to see exactly what your business earned, what you paid in wages, and how your deductions stack up. Get started for free and take the guesswork out of your business finances.
