HOW-TO GUIDE
How to Qualify for the QBI Deduction — IRC §199A Guide 2026
Step-by-step guide to maximizing the QBI deduction — SSTB rules, W-2 wage limitations, aggregation elections, and 2026 sunset planning.
QBI Deduction Overview: 23% deduction under §199A (OBBBA increased from 20%) allows eligible taxpayers to deduct up to 23% of qualified business income (OBBBA §70301) from a pass-through entity (sole proprietorship, S-Corp, partnership, or trust). For a taxpayer in the 37% marginal bracket with $300,000 of QBI, the deduction is worth $60,000 × 37% = $22,200 in federal tax savings.
The QBI deduction is scheduled to are now permanent under OBBBA (P.L. 119-21) (TCJA sunset). However, Congress is expected to extend the deduction as part of the 2025 tax legislation. As of April 2026, the deduction has been extended through 2029 under the Tax Relief and Jobs Act of 2025. Check the current status with your tax professional.
| Income Level | SSTB Limitation | W-2 Wage Limitation | QBI Deduction Available |
|---|---|---|---|
| Below $197,300 (single) / $394,600 (MFJ) | No limitation | No limitation | Full 23% of QBI (OBBBA §70301) |
| $197,300–$247,300 (single) / $394,600–$494,600 (MFJ) | Phase-in of SSTB limitation | Phase-in of W-2 wage limitation | Partial deduction |
| Above $247,300 (single) / $494,600 (MFJ) | SSTB: No deduction | W-2 wage limitation applies | Limited or zero for SSTBs |
Step-by-Step QBI Deduction Optimization
Step 1 — Determine If Your Business Is an SSTB: Specified Service Trades or Businesses (SSTBs) are excluded from the QBI deduction for taxpayers above the income threshold. SSTBs include: health, law, accounting, actuarial science, performing arts, consulting, athletics, financial services, brokerage services, and any trade or business where the principal asset is the reputation or skill of its employees or owners. Engineering and architecture are NOT SSTBs.
Step 2 — Calculate Your QBI: QBI is the net income from a qualified trade or business, excluding: capital gains and losses; dividends; interest income (unless properly allocable to the business); reasonable compensation paid to the taxpayer; and guaranteed payments. For S-Corp owners, QBI is the net income from the S-Corp after deducting reasonable salary.
Step 3 — Apply the W-2 Wage Limitation: For taxpayers above the income threshold, the QBI deduction is limited to the greater of: (a) 50% of W-2 wages paid by the business; or (b) 25% of W-2 wages + 2.5% of the unadjusted basis of qualified property. This limitation incentivizes businesses to pay wages and invest in property.
Step 4 — Consider the Aggregation Election: Taxpayers with multiple pass-through businesses can elect to aggregate them for QBI deduction purposes. Aggregation allows the W-2 wages and qualified property of all aggregated businesses to be combined, potentially increasing the deduction. The aggregation election must be consistent from year to year.
Step 5 — Plan for the SSTB Limitation: If your business is an SSTB and your income is above the threshold, consider strategies to reduce taxable income below the threshold: maximize retirement plan contributions (Solo 401(k), SEP-IRA, defined benefit plan); maximize above-the-line deductions (health insurance, SE tax deduction); consider income-splitting strategies with a spouse.
Case Study: $18,500 Tax Savings from QBI Deduction
David, an S-Corp owner with $250,000 of net S-Corp income and a $90,000 reasonable salary, calculated his QBI deduction: QBI = $250,000 - $90,000 salary = $160,000. QBI deduction = 20% × $160,000 = $32,000. Tax savings at 37% marginal rate: $32,000 × 37% = $11,840. His practitioner also identified that David's business was not an SSTB (he was a software developer, not a consultant) and that his income was below the W-2 wage limitation threshold. The QBI deduction was fully available.
Client Conversation Script
Client: 'What is the QBI deduction? My accountant mentioned it but I don't understand it.' Practitioner: 'The QBI deduction lets you deduct 20% of your business income from your taxes. If your S-Corp generates $200,000 of net income after your salary, you can deduct $40,000 from your taxable income — saving about $14,800 in federal taxes. The catch is that some service businesses (lawyers, accountants, consultants) lose the deduction if their income is too high. What type of business do you have?'
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Apply to Join the Marketplace →Frequently Asked Questions
The QBI deduction under IRC §199A allows eligible taxpayers to deduct up to 23% of qualified business income (OBBBA §70301) from a pass-through entity. The deduction reduces taxable income (not adjusted gross income) and is available to taxpayers who itemize or take the standard deduction.
A Specified Service Trade or Business (SSTB) is a business in a field where the principal asset is the reputation or skill of its employees or owners. SSTBs include: health, law, accounting, actuarial science, performing arts, consulting, athletics, financial services, and brokerage services. SSTBs are excluded from the QBI deduction for taxpayers above the income threshold.
For taxpayers above the income threshold, the QBI deduction is limited to the greater of: 50% of W-2 wages paid by the business; or 25% of W-2 wages + 2.5% of the unadjusted basis of qualified property. This limitation does not apply to taxpayers below the income threshold.
No — the QBI deduction is only available for income from a qualified trade or business. W-2 wages from employment do not qualify for the QBI deduction. The deduction applies to income from sole proprietorships, S-Corps, partnerships, and trusts.
For S-Corp owners, QBI is the net income from the S-Corp after deducting reasonable salary. The S-Corp election reduces SE tax but also reduces QBI (because the salary paid to the owner is not QBI). The optimal salary level balances SE tax savings against QBI deduction reduction.
Rental income may qualify for the QBI deduction if the rental activity rises to the level of a trade or business. The IRS has provided a safe harbor: rental activities qualify if the taxpayer performs 250+ hours of rental services per year and maintains contemporaneous records. Rental income from a triple-net lease generally does not qualify.
If the QBI deduction expires (as scheduled under the TCJA sunset), the 20% deduction would no longer be available. This would increase the effective tax rate on pass-through income by 7.4% (20% × 37% marginal rate). Congress has extended the deduction through 2029 as part of the Tax Relief and Jobs Act of 2025.
The information on this page is intended for licensed tax professionals (CPAs, EAs, and tax attorneys) and is provided for educational and research purposes only. Tax law is complex and fact-specific — all strategies discussed are subject to limitations, phase-outs, and conditions that may not apply to every client situation. Practitioners should independently verify all information against current IRS guidance, Treasury Regulations, and applicable state law before advising clients. This content does not constitute legal or tax advice.
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