If you own a pass-through business, one line on your tax return can quietly cut your taxable income by as much as a fifth. That line is the QBI deduction, the write-off created by Section 199A of the tax code. It lets many owners of sole proprietorships, partnerships, S-Corporations, and LLCs deduct up to 20% of their qualified business income before federal tax is calculated. This guide explains what the deduction is, who qualifies, how the income thresholds and business-type limits work, and how to plan so you capture as much of it as your facts allow.
What is the QBI deduction?
The qualified business income deduction is a federal tax break for owners of pass-through businesses. In simple terms, it allows you to deduct up to 20% of the net income your business passes through to your personal return. The deduction was introduced by the 2017 Tax Cuts and Jobs Act, and the 2025 tax law, often called the One Big Beautiful Bill Act, made it a permanent part of the code rather than a provision set to expire.
Here is why it matters. Pass-through owners report business profit on their individual returns, where it is taxed at ordinary rates. The deduction reduces the amount of that profit exposed to tax. For a business owner in a high bracket, deducting 20% of profit can translate into a meaningful reduction, though the exact benefit depends on your income, your business type, and other factors.
Who qualifies for the deduction
The deduction is available to individuals, certain trusts, and estates that receive qualified business income from a pass-through entity. That covers most small and mid-sized business owners in the United States. It does not apply to income earned as a regular employee, and it does not apply to a C-Corporation, which is taxed under its own separate rules.
Qualified business income means the net profit from a trade or business operated in the United States. It generally excludes certain items, such as capital gains and losses, dividends, and interest income that is not properly allocable to the business. Reasonable compensation paid to an S-Corporation owner and guaranteed payments to partners are also excluded from QBI, which is an important planning point we return to below.
The income thresholds that change everything
The rules are straightforward at lower income levels and more involved at higher ones. Below a taxable income threshold set each year, most owners simply take 20% of their qualified business income, with few complications. Above that threshold, two limits phase in and can reduce or eliminate the deduction depending on your type of business.
The threshold is indexed for inflation, so confirm the current figure with the IRS before you plan. For recent years, the threshold has sat near $197,000 for single filers and roughly $394,000 for joint filers. Once your taxable income moves into the phase-in range above the threshold, the calculation shifts. The 2025 law widened that phase-in range, which softens the cliff that used to catch owners just over the line.
The two limits that apply above the threshold
When your income exceeds the threshold, the QBI deduction is capped by the greater of two tests. Understanding them tells you which levers actually move your deduction:
- The W-2 wage limit. Your deduction cannot exceed 50% of the W-2 wages your business pays, calculated per qualified trade or business.
- The wage-and-property limit. Alternatively, the cap can be 25% of W-2 wages plus 2.5% of the unadjusted basis of qualified depreciable property the business holds. This version helps capital-intensive businesses that pay modest wages.
In practice, a service business that pays little in wages may find its deduction limited once income passes the threshold, while a business with a real payroll or significant equipment often preserves more of it. Because these limits reward paying wages and holding qualified property, they open the door to planning rather than closing it.
Specified service businesses face an extra hurdle
The code singles out one group for tighter treatment: the specified service trade or business, often shortened to SSTB. This category includes fields such as health, law, accounting, consulting, financial services, performing arts, and any business whose principal asset is the reputation or skill of its owners or employees.
Below the income threshold, an SSTB owner takes the full deduction like anyone else. Above it, the deduction phases out and disappears entirely once taxable income clears the top of the phase-in range. So a physician, attorney, or consultant with high household income may lose the deduction that a manufacturer or a real estate operator at the same income keeps. This distinction is one of the most misunderstood parts of Section 199A, and it is where careful planning tends to pay off most.
A worked example
Numbers make the concept concrete. Consider a married couple filing jointly. One spouse runs a non-service business, a small manufacturing operation, that produces $200,000 of qualified business income. Their total taxable income sits comfortably below the threshold. The couple deducts 20% of the $200,000, or $40,000, straight off their taxable income.
| Item | Amount |
|---|---|
| Qualified business income | $200,000 |
| QBI deduction rate | 20% |
| Deduction against taxable income | $40,000 |
| Taxable income removed by the deduction | $40,000 |
| Potential federal tax reduced | Roughly $9,000 to $14,000, subject to your bracket and circumstances |
The exact saving depends on the couple’s marginal rate and other items on the return, so treat these figures as illustrative rather than a promise. Even so, the example shows why the deduction is worth understanding before the year ends rather than after.
How to plan around the QBI deduction
Because the deduction turns on taxable income, business type, wages, and property, there are legitimate ways to position yourself to keep more of it. None of these are loopholes. They are ordinary planning choices that happen to interact with Section 199A. Consider the following, always with a professional who knows your full picture:
- Manage taxable income near the threshold. Retirement plan contributions, such as a Solo 401(k) or a defined benefit plan, lower taxable income and can pull an owner back under the threshold where the deduction is simplest.
- Mind the reasonable compensation trade-off. For an S-Corporation, wages paid to you reduce QBI but also count toward the W-2 wage limit. Setting a defensible salary is a balancing act, which is why S-Corp reasonable compensation deserves its own careful analysis.
- Consider entity structure. How you take money out of the business affects both QBI and payroll tax. Our guide on how to pay yourself as an LLC walks through the choices that feed into this deduction.
- Track wages and qualified property. If you are above the threshold, the wage-and-property limit means payroll and equipment purchases can protect part of the deduction.
- Watch the SSTB line. Service business owners near the phase-out should model the deduction early, since a modest change in income can swing it substantially.
The common thread is timing. Most of these moves must happen before the calendar year closes, which is exactly why proactive planning beats waiting until filing season.
The reasonable compensation balancing act
For S-Corporation owners, one tension sits at the center of the QBI deduction. The salary you pay yourself is not qualified business income, so a higher salary shrinks the profit eligible for the 20% deduction. Yet above the income threshold, that same salary counts toward the W-2 wage limit that caps how much deduction you can take.
The result is that there is often an optimal salary level, not simply the lowest defensible number. Set the salary too low and you may run into the wage limit above the threshold. Set it too high and you erode the QBI base. The right figure depends on your total income, your business type, and the wages the company already pays to others. This is a calculation worth running with a strategist rather than estimating, because the difference can be several thousand dollars in either direction.
Frequently asked questions
Can I take the QBI deduction if I do not itemize?
Yes. The deduction is available whether you take the standard deduction or itemize. It is calculated separately from itemized deductions and reduces your taxable income on top of whichever deduction method you use.
Does an S-Corporation owner get the deduction on their whole profit?
No. The reasonable salary paid to an owner-employee is excluded from qualified business income, so only the remaining pass-through profit counts toward the deduction. This is why the salary decision and the deduction are closely linked.
What happens to the deduction if my business is a specified service business?
Below the income threshold, an SSTB owner takes the full deduction. As income rises through the phase-in range, the deduction shrinks, and above the top of that range it is no longer available for the service business. Planning that keeps taxable income lower can preserve it in some cases.
Turn a complex rule into a planned deduction
The QBI deduction rewards owners who understand it before the year ends, not those who discover it in April. The core idea is simple, 20% of qualified business income, but the thresholds, the wage and property limits, and the service-business rules mean the number you actually capture depends on choices you make in advance. For most profitable owners, this is one of the highest-value planning items of the year, and it interacts with almost every other strategy you use.
For a clear starting point, download our free Top 5 Tax Strategies for High-Income Earners guide. When you want the full framework of more than 100 strategies, including entity design, reasonable compensation, and how they feed the QBI deduction, explore the ETS Playbook. To confirm the current thresholds and rules, review the IRS overview of the qualified business income deduction, and speak with a licensed tax professional about how the rules apply to your situation.
The strategies described here are general educational information about the U.S. tax code. Individual results vary based on income, entity structure, state law, and other factors. This is not personalized tax, legal, or financial advice. Consult a licensed tax professional before implementing any strategy.
