The QBI Deduction Explained: How to Get Up to 20% Off Your Business Income

What Is the QBI Deduction?

The Qualified Business Income (QBI) deduction — also called the Section 199A deduction — was created by the Tax Cuts and Jobs Act of 2017. It allows eligible self-employed individuals and owners of pass-through businesses (sole proprietorships, partnerships, S-Corps, and certain trusts) to deduct up to 20% of their qualified business income from their federal taxable income.

It's one of the most significant tax benefits enacted in decades, yet surveys consistently show that millions of eligible taxpayers either don't claim it or claim it incorrectly.

Who Qualifies for the QBI Deduction?

To qualify for the full 20% QBI deduction, you need to meet three basic conditions:

1. You have income from a "pass-through" business (not a C-Corp)
2. Your taxable income is below the threshold for your filing status
3. Your business is not a "Specified Service Trade or Business" (SSTB) — or if it is, your income is below the phase-out range

The Income Thresholds (2025)

For 2025, the QBI deduction operates in three zones based on your total taxable income:

• Full deduction (20% of QBI): Taxable income below $197,300 (single) or $394,600 (married filing jointly)
• Phase-out range: $197,300–$247,300 single / $394,600–$494,600 MFJ — for SSTBs, the deduction phases out completely; for non-SSTBs, W-2 wage limitations begin to apply
• Above the phase-out: Non-SSTB businesses can still claim a limited deduction based on W-2 wages paid and/or qualified property; SSTBs receive no deduction

What Is "Qualified Business Income"?

QBI is the net income from your qualified trade or business, calculated on a per-business basis. It includes:

• Net profit or loss from operating the business
• Deductions specifically allocable to the business

QBI does NOT include:

• W-2 wages you pay yourself from an S-Corp (your salary is not QBI — only the pass-through profit)
• Investment income (capital gains, dividends, interest not from the business)
• Reasonable compensation for S-Corp shareholders
• Guaranteed payments from partnerships

Specified Service Trades or Businesses (SSTBs)

An SSTB is a business in one of these fields: health, law, accounting, actuarial science, performing arts, consulting, athletics, financial services, brokerage services, or any business where the principal asset is the reputation or skill of one or more of its employees or owners.

If your business is an SSTB and your income is above the phase-out range, you receive no QBI deduction. If your income is below the lower threshold, you can claim the full 20% regardless of SSTB status. In the phase-out range, the SSTB deduction is reduced proportionally.

The W-2 Wage Limitation

For businesses above the income threshold (non-SSTBs), 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 immediately after acquisition

This is why S-Corp election and proper salary setup matters for high-income business owners: paying yourself a reasonable W-2 salary creates the wage base that allows you to maximize the QBI deduction even above the income thresholds.

How to Calculate Your QBI Deduction

Simple example for a business below the income threshold:

1. Net business income (QBI): $150,000
2. 20% of QBI: $30,000
3. Compare to 20% of taxable income (from all sources minus the standard deduction): if taxable income is $160,000 after deductions, 20% = $32,000
4. Your QBI deduction is the lesser of the two: $30,000
5. At a 24% tax bracket, this saves $7,200 in federal income taxes

QBI Deduction + S-Corp: The Combination That Maximizes Savings

The QBI deduction and S-Corp election work together powerfully for businesses in the $100,000–$400,000 net income range:

• S-Corp election reduces payroll taxes on distributions (saves $6,000–$20,000)
• The S-Corp pass-through profit qualifies as QBI (20% deduction reduces income tax)
• The combination can produce total tax savings of $15,000–$40,000+ annually for the right businesses

Understanding how these strategies interact is exactly the kind of proactive tax planning that a proper tax structure is designed to capture. A free consultation can model your specific numbers and show you what you're currently leaving on the table.