Understanding the Qualified Business Income Deduction (QBID)

The Qualified Business Income Deduction (QBID), also called the Section 199A deduction, is one of the most valuable tax breaks available to small business owners. If you own a sole proprietorship, partnership, S corporation, or an LLC taxed as a pass-through entity, you may be able to deduct up to 20% of your qualified business income (QBI) directly on your personal tax return.

Originally created by the Tax Cuts and Jobs Act, the deduction was set to expire after 2025. Recent legislation has made it permanent and added new taxpayer-friendly provisions starting in 2026.

What Does the QBID Cover?

The deduction generally allows eligible taxpayers to deduct up to 20% of:

• Qualified business income (QBI) from a domestic trade or business

• Qualified REIT dividends

• Qualified publicly traded partnership (PTP) income

One important point: unlike most business deductions, the QBID is not claimed by the business itself. It's claimed by you, the individual owner, on your personal tax return. It lowers your taxable income, but it does not reduce your adjusted gross income (AGI) or your self-employment tax.

What Counts as Qualified Business Income?

QBI is generally the net profit your business generates from normal operations, but it's not simply your bottom line. Several deductions reduce QBI before you apply the 20%:

• Deductible self-employment tax

• Self-employed health insurance premiums

• Contributions to qualified retirement plans (e.g., SEP-IRA, Solo 401(k))

• Unreimbursed partnership expenses

• Business interest expense

What's Not Included in QBI

Some income that flows through your business doesn't qualify. QBI specifically excludes:

• Interest income not tied to business operations

• Dividends and capital gains

• Foreign currency gains or losses

• Annuity income unrelated to the business

• W-2 wages paid to you as an S corporation shareholder

• Guaranteed payments received by partners

• Qualified REIT dividends and qualified PTP income (these get their own separate 20% deduction)

Because of these exclusions, your QBI is often lower than your reported business profit.

Income Thresholds: When It Gets More Complicated

For most taxpayers with modest income, the QBID is straightforward; you simply deduct 20% of your QBI. But once your taxable income exceeds certain thresholds, additional rules kick in.

2025 vs 2026 Thresholds

*Note: 2026 figures are estimates; IRS has not yet published official amounts

Below the threshold?

You generally get the full 20% deduction; no further calculations needed.

Above the threshold?

Two types of additional limitations begin to phase in.

The Phase-In Range

The limitations don't hit all at once, instead they phase in gradually over a range above the threshold:

• $50,000 for single and most other filers

• $100,000 for married filing jointly

For example, a married couple filing jointly starts hitting the limitations once taxable income exceeds $394,600, and the limitations are fully in effect once income reaches $494,600.

The W-2 Wage and Property Limitation

Once your taxable income is above the threshold, your QBID may be capped based on how much your business pays in wages and/or owns in business property.

Your deduction generally cannot exceed the greater of:

• 50% of W-2 wages paid by the business, or

• 25% of W-2 wages + 2.5% of the cost of qualified business property (measured at the time of purchase)

"Qualified property" means depreciable tangible assets; think equipment, machinery, or real property that are still within their depreciable life.

This limitation exists to prevent large deductions from businesses that have little payroll or capital investment.

Example

Maya runs a consulting firm as a sole proprietorship. Her business generates $300,000 in qualified business income, and her taxable income is $420,000, which is above the married filing jointly threshold of $394,600.

Her business paid $60,000 in W-2 wages and owns no qualified property.

Tentative QBID: $300,000 × 20% = $60,000

Wage limitation: 50% of $60,000 W-2 wages = $30,000

Because her taxable income puts her fully in the limitation zone, her deduction is capped at $30,000; half of what it would have been without the wage limitation.

Planning tip: Business owners in this situation sometimes increase their W-2 wages, either by hiring employees or, for S corporation owners, by paying themselves a higher salary to increase the allowable deduction.

Specified Service Trades or Businesses (SSTBs)

Congress placed extra restrictions on businesses that are primarily built around personal expertise or professional services. These are called Specified Service Trades or Businesses (SSTBs) and include:

• Health and medical services

• Law

• Accounting

• Actuarial science

• Performing arts

• Consulting

• Athletics

• Financial services and brokerage

• Investment management and securities trading

Also included are businesses where the primary asset is the personal reputation or skill of an owner or employee, though IRS regulations define this category narrowly.

How SSTB Status Affects Your Deduction

If your taxable income is below the threshold, your SSTB qualifies for the deduction just like any other business; no penalty for being in a restricted field.

If your taxable income is within the phase-in range, your deduction begins to shrink.

If your taxable income is above the phase-in range, the QBID is completely eliminated for income from the SSTB.

For 2025, the cutoffs are:

• Single filers: Deduction fully eliminated above $247,300

• Married filing jointly: Deduction fully eliminated above $494,600

What's Changing in 2026

The Deduction Is Now Permanent

The biggest change: the QBID will no longer expire. Under new legislation, it continues indefinitely and therefore, business owners can plan around it for the long term.

Wider Phase-In Range

Starting in 2026, the phase-in range expands, meaning more taxpayers will receive at least a partial deduction before limitations fully apply:

• $75,000 for single and other non-joint filers (up from $50,000)

• $150,000 for married filing jointly (up from $100,000)

New $400 Minimum Deduction

A new minimum deduction takes effect in 2026 for eligible active business owners. The QBID will be the greater of:

• $400 (indexed for inflation after 2026), or

• The amount calculated under the standard Section 199A rules

To qualify for the minimum, you must:

• Have at least $1,000 in aggregate qualified business income, and

• Materially participate in the business (using the same standards as the passive activity loss rules)

This ensures that active business owners always receive some benefit from Section 199A, even when the standard calculation would produce a very small deduction.

Key Takeaways

The QBID is one of the most powerful tax benefits available to pass-through business owners, but its value depends heavily on your situation:

• Low to moderate income? You are likely to get the full 20% deduction with no extra math required.

• Higher income? W-2 wage and property limitations may reduce your deduction, but smart planning around payroll and business structure can help.

• In a service profession? Your deduction may phase out entirely if your income is high enough.

• Planning ahead? The deduction is now permanent, with more generous rules starting in 2026.

Because the rules interact in complex ways, many taxpayers benefit from working with a tax professional to model different scenarios and make sure they're capturing the full deduction available to them.