The Qualified Business Income (QBI) deduction, created by Section 199A of the Internal Revenue Code, lets eligible business owners deduct up to 20% of their net business income from taxable income. For a sole proprietor netting $100,000 on Schedule C, that can mean a $20,000 reduction in taxable income — without any additional expense.
The mechanics have important constraints: income limits, a list of excluded service businesses above the threshold, and wage limitations that kick in for high earners. Overclaiming it or not claiming it at all are both common errors among self-employed owners.
IRS guidance on the QBI deduction is the authoritative reference. This guide explains how the deduction works and where it most affects your 2026 return.
Who Qualifies for the QBI Deduction
The deduction is available to owners of pass-through entities — businesses whose income flows to the owner’s personal tax return:
- Sole proprietors (Schedule C income)
- Single-member LLCs taxed as sole proprietorships
- Partnerships and multi-member LLCs (Schedule K-1 income)
- S corporations (Schedule K-1 income)
- Qualifying trusts and estates
The deduction does not apply to C corporations, W-2 employees, or hobby income that doesn’t meet the IRS definition of a trade or business.
What Counts as Qualified Business Income
QBI is your net income from a qualified trade or business conducted within the United States, after allowable deductions. It specifically excludes:
- Your own W-2 wages if you pay yourself a salary as an S-corp owner
- Capital gains and losses
- Dividends (except qualified REIT dividends)
- Interest income not tied to ordinary business activity
- Income from certain foreign sources
If your business had a net loss, that negative QBI carries forward to reduce QBI in the next tax year — it doesn’t disappear.
Income Thresholds: Three Zones
The deduction works differently depending on where your total taxable income falls.
Zone 1 — Below the threshold
For 2025, the thresholds were $197,300 for single filers and $394,600 for married filing jointly. The IRS adjusts these annually for inflation; verify the current year’s figure at irs.gov/newsroom/qualified-business-income-deduction before filing.
Below the threshold, the calculation is straightforward: 20% × QBI, capped at 20% of your overall taxable income. Most sole proprietors and small business owners fall here and claim the full deduction without restriction.
Zone 2 — Inside the phase-out range
The phase-out band runs $50,000 above the threshold for single filers ($100,000 for MFJ). Inside this range, specified service business deductions begin phasing out, and W-2 wage limitations start phasing in for other businesses.
Zone 3 — Above the phase-out range
For specified service businesses, the deduction disappears entirely. For all other businesses, the deduction is limited to the greater of:
- 50% of W-2 wages the business paid to employees, or
- 25% of W-2 wages plus 2.5% of the unadjusted basis of all qualified property held by the business
A high-income sole proprietor with no employees and no qualified property can face a limitation that eliminates the deduction above the threshold — a common planning gap for single-owner businesses.
Specified Service Trades or Businesses (SSTBs)
The IRS designates certain professions as “specified service trades or businesses” that lose the deduction once income exceeds the threshold. SSTB categories include:
- Health (physicians, therapists — generally not pharmacies or dental supply businesses)
- Law
- Accounting
- Actuarial science
- Performing arts
- Consulting
- Athletics
- Financial services and brokerage
- Investing, trading, or dealing in securities or commodities
Two notable exceptions: engineering and architecture are not SSTBs — they remain QBI-eligible regardless of income level.
The Critical Point: QBI Does Not Reduce Self-Employment Tax
This is the most common misunderstanding about Section 199A. The QBI deduction reduces income tax only — it does not touch your self-employment tax.
If you’re a sole proprietor, your self-employment tax (15.3% on the first $184,500 of net SE income in 2026, with the Medicare-only rate applying above that) is calculated on Schedule C net income before the QBI deduction. The deduction arrives later on Form 1040, reducing your taxable income — but by that point, SE tax is already calculated and fixed.
How Other Tax Moves Interact With QBI
Several strategies commonly used by self-employed owners affect your QBI directly:
- Home office deduction: Reduces Schedule C net income and therefore QBI. For owners near the phase-out threshold, this is a planning variable worth tracking.
- S-corp reasonable compensation: The W-2 salary you pay yourself as an S-corp reduces your K-1 QBI but increases the W-2 wage pool used in the limitation calculation above the threshold. The interaction requires deliberate planning to maximize the deduction.
- Retirement plan contributions: SEP-IRA and Solo 401(k) contributions reduce net SE income and QBI. See retirement plans for self-employed for how contribution limits interact with QBI.
- Section 179 and bonus depreciation: Expensing large business property purchases reduces QBI in the current year but also builds the property-basis pool used in the W-2 wage + property limitation calculation for owners above the threshold.
How to Claim the QBI Deduction
The IRS provides two forms for calculating the deduction:
- Form 8995: For taxpayers with income below the threshold, or non-SSTB owners above the threshold with straightforward W-2 wage situations.
- Form 8995-A: For multiple businesses, SSTBs, above-threshold W-2 wage and property-basis limitations, or QBI loss carryforwards from prior years.
Both forms feed into Line 13 of Form 1040, where the final deduction amount reduces your taxable income.
What This Means for Business Funding Applications
Lenders reviewing your business loan application typically use your Schedule C net income or K-1 income — the same figure the QBI deduction starts from. Business deductions (home office, depreciation, retirement contributions) reduce taxable income, which is the goal, but they also reduce the income figure lenders use to underwrite your borrowing capacity.
This is the tradeoff self-employed owners navigate: maximizing deductions for tax purposes while preserving documented income for funding applications. Understanding which deductions affect your lender-visible income and how to present the full picture — including add-backs lenders sometimes allow for depreciation — can affect your funding options.
If you’re a sole proprietor or S-corp owner considering business funding, start an application at ClearValue Lending — your documented income and business profile drive both your QBI calculation and your funding eligibility.
