A freelance web developer with $130,000 in qualified business income could potentially lower taxable income by $26,000 without extra spending, new deductions, or an entity change. That is Section 199A in action, a 20% deduction for eligible pass-through owners. Many qualifying founders have never worked out the amount correctly, and some do not know the deduction exists.
Section 199A: Coverage and Basics
The Tax Cuts and Jobs Act of 2017 created Section 199A for pass-through owners, partly offsetting the corporate tax rate reduction available to C corporations. Eligible owners may deduct up to 20% of qualified business income (QBI) from taxable income.
Section 199A generally covers:
- Sole proprietorships, Schedule C filers
- Single-member LLCs taxed as sole props
- Partnerships and multi-member LLCs
- S corporations
- Some trusts and estates
C corporations are excluded. The deduction belongs on the individual return, not the business return, and lowers taxable income rather than adjusted gross income.
The 20% Calculation
QBI is net income from the pass-through business, meaning revenue less ordinary business expenses. It excludes W-2 pay from your S corporation, investment income, capital gains, and income earned outside the United States.
The deduction uses the lower of:
- 20% of QBI from all qualifying businesses
- 20% of taxable income minus net capital gains
The second ceiling applies when taxable income is lower. With $100,000 of QBI but just $70,000 of taxable income after the standard deduction, the deduction is 20% of $70,000 ($14,000), not 20% of $100,000 ($20,000).
When taxable income is well above QBI, the first limit usually controls: QBI x 20%.
Why Service Businesses Differ
Congress created a restricted category called Specified Service Trades or Businesses (SSTBs). It includes businesses centered on the reputation or skill of their owners or employees, including health, law, accounting, actuarial science, performing arts, consulting, athletics, financial services, brokerage services, and similar businesses where that reputation or skill is the principal asset.
For an SSTB, eligibility depends on income. Below the taxable income threshold, owners receive the full 20% deduction. Above the threshold, the deduction gradually disappears.
For 2025, the SSTB phase-out began at approximately $197,300 for single filers and $394,600 for married filing jointly. It ended $50,000 above the single threshold or $100,000 above the joint threshold. A single SSTB owner above approximately $247,300 in 2025 could not claim the deduction. The thresholds are indexed for inflation and change annually.
For non-SSTB owners, higher income does not eliminate the deduction. Instead, the W-2 wage and property test limits it.
The W-2 Wage and Property Test
Once a non-SSTB owner's taxable income exceeds the same thresholds, the deduction is limited to the greater of:
- 50% of employee W-2 wages paid by the business
- 25% of W-2 wages plus 2.5% of qualified property basis
For a sole proprietor or single-person LLC without W-2 employees or meaningful depreciable property, this limit can sharply reduce or eliminate the deduction at high incomes. A consultant earning $300,000 in net profit with no employees or business property would compare 50% of $0 W-2 wages, or $0, with 25% of $0 plus 2.5% of minimal property, nearly $0. Despite significant income, that founder might receive little or no Section 199A deduction.
An S corporation election can address this limit. The owner takes a reasonable W-2 salary, creating wages for the test. It is a valid planning option, but it brings payroll taxes and added administration. The savings may or may not outweigh those costs, depending on income and business structure.
When SSTB Status Is Unclear
The SSTB list leaves gray areas. Is a software company that consults on implementation an SSTB? Is a marketing agency an SSTB when the founder's expertise drives its value? Does a bookkeeper giving financial planning advice fit another category?
IRS regulations address many edge cases, but the answer is not always clear. If your business sits near the SSTB boundary and your income approaches the phase-out thresholds, the classification can materially change the deduction. A CPA familiar with the regulations should review it.
SSTB rules do not affect every founder. When income is well below the phase-out thresholds, either classification generally produces the full 20% deduction. The issue matters most for founders with $150,000 to $250,000 of taxable income who fall within or near an SSTB category.
Claiming the Deduction
Use IRS Form 8995 for simpler cases or Form 8995-A for multiple businesses and situations near the W-2 limit. The deduction reaches Schedule A of Form 1040 as a reduction of taxable income, separate from itemized deductions. It remains available even when you take the standard deduction.
Because the calculation occurs on the individual return, business income must be reported correctly from Schedule C, Schedule K-1, or an S corporation W-2 and K-1. Mistakes in those documents flow directly into the Section 199A calculation.
Uprise users who track quarterly profit and loss can have the platform capture the QBI data for this calculation. It also estimates the Section 199A deduction from current-year profit, helping you include the benefit in quarterly tax estimates instead of waiting until filing time.
Section 199A, created by the Tax Cuts and Jobs Act, is set to expire after tax year 2025 unless Congress extends it. Legislation was actively debated when this article was written. Ask a CPA who follows current law for advice about your situation. This article explains the deduction generally and is not personalized tax guidance.