What is the §199A qualified business income deduction?
Section 199A allows eligible owners of pass-through businesses — sole proprietorships, partnerships, and S-corporations — to deduct a portion of qualified business income. Above income thresholds that adjust each year, the deduction is limited by wages paid and property held, and is restricted for specified service businesses including health, law, and consulting. The thresholds are the pivot; planning happens around them.
For tax year 2025
Key points
- Section 199A lets eligible owners of sole proprietorships, partnerships, and S-corporations deduct a portion of qualified business income on their personal return.
- The One Big Beautiful Bill Act of 2025 made the qualified business income deduction permanent and adjusted the income ranges over which its limits phase in.
- Above the income thresholds, the qualified business income deduction is limited by W-2 wages the business pays and the basis of qualifying property it holds.
- Specified service trades or businesses, including health, law, accounting, and consulting, lose the deduction entirely above the upper income threshold.
- Owner compensation, income timing, and deductible retirement contributions can move taxable income relative to the thresholds and preserve the deduction.
How does the qualified business income deduction work?
The qualified business income deduction under Section 199A lets eligible owners of pass-through businesses deduct a portion of their qualified business income, which is broadly the ordinary income the business earns. Pass-through businesses are those whose profit flows to the owners' personal returns: sole proprietorships filing Schedule C, partnerships issuing a Schedule K-1, and S-corporations. The deduction is computed on Form 8995 or Form 8995-A and reduces the income on which the owner is taxed.
This rule changed. The deduction was originally scheduled to expire after 2025, and the One Big Beautiful Bill Act (P.L. 119-21, signed July 4, 2025) made it permanent while adjusting the income ranges over which its limits phase in. Because those ranges move each year and were revised by this law, confirm the current thresholds with your CPA before relying on any specific number.
What limits apply above the income thresholds?
Below the income thresholds, eligible owners generally take the deduction on their qualified business income without additional tests. Above those thresholds, two limits phase in. The deduction becomes constrained by the W-2 wages the business pays and by the unadjusted basis of qualifying property it holds, so a business with little payroll or few assets may find its deduction capped even when income is high. This is why owner compensation, staffing, and asset ownership all influence the result.
A second restriction applies to specified service trades or businesses: fields where the principal asset is the reputation or skill of the owners and employees, including health, law, accounting, actuarial science, performing arts, consulting, athletics, and financial services. For these businesses the deduction phases out entirely above the upper threshold, so many successful professionals lose it as income rises. Whether a business falls into this category is a classification question the CPA works through with the owner, not a label the owner chooses.
Who benefits from planning around the thresholds?
The thresholds are the pivot. An owner comfortably below them generally keeps the full deduction and rarely needs to do much. An owner far above them in a specified service field has lost the deduction, and planning cannot restore it. The owner who sits at or near a threshold is the one for whom planning makes a real difference, because moving taxable income across the line, or changing the wage and property figures that drive the limits, can preserve or restore a deduction that would otherwise shrink.
The levers are the timing of income and expenses, how an S-corporation owner is compensated in salary versus distributions, and deductible contributions to a retirement plan, all of which move taxable income relative to the thresholds. Because the deduction interacts with entity type, payroll, assets, and total household income, the right first step is to identify where your income sits relative to the current thresholds and plan deliberately from there.
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Related strategies
- §199AThe qualified business income deductionNo outlay
- §1366Reasonable compensation for S-corporation ownersNo outlay
- §401Solo 401(k), SEP, defined benefit and cash balance plansCapital outlay
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Sources
Related guides: high income professionals, professional services
Mena Hemaia, CPA, CIA
Chief Executive Officer, Accountack — West Palm Beach, Florida
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