2026 update: The One Big Beautiful Bill Act, signed July 4, 2025, made the QBI deduction permanent. The sunset that would have ended it after 2025 is gone. The deduction rate stays at 20 percent. An earlier House proposal to raise it to 23 percent did not make the final law. Two changes take effect for the 2026 tax year: a new $400 minimum deduction for owners with at least $1,000 of qualified business income who materially participate in the business, and a wider phase-in range that lets more owners near the limits keep part of the deduction.

Understanding the Qualified Business Income Deduction (QBI)

Qualified Business Income (QBI) is a term that refers to the net amount of income, gain, deduction, and loss from any qualified trade or business. Essentially, it is the profit that a business generates from its core operations. QBI includes income from partnerships, S corporations, sole proprietorships, and certain trusts. It does not encompass items like capital gains and losses, dividends, interest income, and income earned outside the United States​.

QBI is specifically designed to exclude certain types of income to ensure that the deduction targets business operations rather than investment or passive income. For instance, wages earned as an employee, guaranteed payments to partners, and reasonable compensation to S corporation shareholder-employees are not considered QBI​.

Moreover, QBI must be derived from domestic business activities, meaning the income must be connected to business operations conducted within the United States. This ensures that the tax benefits support domestic businesses and economic activities.

What is Qualified Business Income (QBI)?

Qualified Business Income (QBI) is the net amount of income, gain, deduction, and loss from any qualified trade or business. It does not include items such as capital gains and losses, dividends, interest income, and income earned outside the U.S. The QBI deduction is available to owners of pass-through entities, such as sole proprietorships, partnerships, S corporations, and some trusts and estates.

Income Limits and Phase-Outs

For the 2026 tax year, the QBI deduction phases out for single filers with taxable income between $201,750 and $276,750 and for married couples filing jointly with income between $403,500 and $553,500. If your income exceeds these thresholds, your eligibility for the deduction is limited, especially if you are involved in a Specified Service Trade or Business (SSTB).

Specified Service Trade or Business (SSTB)

A Specified Service Trade or Business (SSTB) is a classification that affects the eligibility and amount of the Qualified Business Income (QBI) deduction for certain businesses. SSTBs include fields where the principal asset is the reputation or skill of employees or owners. These fields include health, law, accounting, actuarial science, performing arts, consulting, athletics, financial services, and investing and investment management​.

The classification is critical because if a business is designated as an SSTB and its income exceeds the QBI phase-out thresholds, the owners might not qualify for the QBI deduction. For 2026, the income thresholds are $201,750 for single filers and $403,500 for married filing jointly. For an SSTB, the deduction fully phases out once taxable income reaches $276,750 for single filers and $553,500 for married filing jointly.

However, not all businesses in related fields are considered SSTBs. For instance, architecture and engineering firms are explicitly excluded from the SSTB classification, allowing them to benefit from the QBI deduction regardless of income levels.

Additionally, the IRS has clarified that the SSTB definition does not trap businesses where income derives from the reputation or skill of employees unless specific criteria are met, such as receiving fees for endorsements or using an individual’s image or name.

Calculating the QBI Deduction

The QBI deduction is calculated as the lesser of:

• 20% of QBI
• 20% of taxable income minus net capital gains

For higher income levels, an additional limitation applies, where the deduction is limited to the lesser of:

• 50% of W-2 wages paid by the business
• 25% of W-2 wages plus 2.5% of the unadjusted basis of qualified property held by the business​

For 2026, owners with at least $1,000 of qualified business income who materially participate in the business can claim a minimum deduction of $400 even when the calculation above would otherwise drop to zero. This floor does not override the SSTB rules, so an SSTB owner above the upper threshold still gets nothing.

Maximizing Your QBI Deduction

To make the most of the Qualified Business Income (QBI) deduction, business owners should employ several strategic actions to optimize their taxable income.

1. Monitor Income Levels

Keeping your taxable income below the phase-out thresholds is critical. For the 2026 tax year, the phase-out begins at $201,750 for single filers and $403,500 for married couples filing jointly. Consider deferring income or accelerating deductions to remain below these limits. For example, making large purchases or paying for services in advance can help lower taxable income.

2. Optimize W-2 Wages

For higher-income businesses, ensuring that the business pays sufficient W-2 wages is essential. The QBI deduction for higher earners is limited to the lesser of 20% of QBI or the greater of 50% of W-2 wages or 25% of W-2 wages plus 2.5% of unadjusted basis immediately after acquisition (UBIA) of qualified property​.

3. Maximize Retirement Contributions

Contributing to self-employed retirement plans can reduce taxable income, potentially keeping you within the QBI phase-out thresholds. Plans such as SEP IRAs or Solo 401(k)s allow significant contributions, thus lowering your overall taxable income​.However, note that these contributions reduce QBI, so balance is necessary.

4. Evaluate Business Structure

Choosing the right business structure can significantly impact the QBI deduction. For instance, converting a sole proprietorship to an S corporation might optimize your QBI deduction by allowing you to pay reasonable compensation as W-2 wages, thereby meeting the wage limitation requirements.

5. Model QBI Against Bonus Depreciation

Under OBBBA, 100 percent bonus depreciation is permanent again, and it directly reduces qualified business income. A large bonus depreciation deduction pulls QBI down, and in some cases pushes it negative. For an owner sitting just above the threshold, that drop can move taxable income back under the limit and free up the full deduction, which can help owners of non-service businesses such as engineering firms. For another owner, the same deduction can wipe out QBI and waste part of the benefit. Run the QBI number with and without bonus depreciation before you finalize a return.

By carefully planning and implementing these strategies, business owners can maximize their QBI deduction and effectively reduce their taxable income. Consulting with a tax professional can further ensure that you are taking full advantage of available tax benefits.

Case Study: Maximizing QBI Deduction

Consider a married couple running a consulting firm with a combined taxable income of $440,000. Consulting is a Specified Service Trade or Business, so once their income climbs into the phase-out range they start to lose the deduction. By making strategic retirement plan contributions and managing their income, they could bring taxable income below the $403,500 threshold for 2026, restoring the full QBI deduction.

Looking Forward

The QBI deduction is now a permanent part of the tax code, so the planning question is no longer how to use it before it disappears. It is how to qualify for the largest deduction each year. For owners near the phase-out range, that means managing taxable income, wages, and entity choice on a recurring basis rather than treating it as a one-time move.

How TaxPlanIQ Can Help

Navigating complex tax strategies like the QBI deduction can be challenging. TaxPlanIQ simplifies this process by offering curated tax strategies, easy-to-understand implementation steps, and the ability to create custom-branded tax plans with just a few clicks. Sign up for a free demo of TaxPlanIQ today to see how it can help your firm grow revenue, increase client satisfaction, and streamline your tax planning services.

Frequently Asked Questions

Did OBBBA make the QBI deduction permanent?

Yes. The One Big Beautiful Bill Act made the 20 percent qualified business income deduction a permanent part of the tax code. It had been set to expire after 2025. An earlier proposal to raise the rate to 23 percent did not pass, so the deduction stays at 20 percent with no expiration date.

What are the QBI income thresholds for 2026?

For 2026, the deduction starts to phase out once taxable income passes $201,750 for single filers and $403,500 for married couples filing jointly. It fully phases out for a specified service business at $276,750 single and $553,500 joint. Below the lower threshold, the full 20 percent deduction is available regardless of the type of business.

What is the new $400 QBI minimum deduction?

Starting in 2026, owners with at least $1,000 of qualified business income who materially participate in the business can claim a minimum deduction of $400, even when the standard calculation would produce a smaller figure. The $400 and $1,000 amounts adjust for inflation after 2026. This floor does not override the rules that zero out the deduction for service businesses above the income limits.

Who does not qualify for the QBI deduction?

The owners most affected are those in a specified service trade or business: health, law, accounting, consulting, financial services, and similar fields that depend on the owner's reputation or skill. For 2026, an SSTB owner with taxable income at or below $201,750 (single) or $403,500 (joint) claims the full 20 percent. Past those figures the deduction phases down on a sliding scale, and once income reaches $276,750 (single) or $553,500 (joint) the SSTB deduction is gone completely. A non-service business owner at the same income can still qualify under the wage and property tests, so the shutout is specific to service firms.

Can an accounting firm claim the QBI deduction?

It depends on income. Accounting is a specified service trade or business, so once an accountant's taxable income rises above the 2026 upper threshold, $276,750 single or $553,500 joint, the deduction phases out to zero. Accountants under the lower threshold get the full 20 percent. This is one reason income timing and entity choice matter for firm owners.

How can business owners maximize the QBI deduction?

The goal is keeping taxable income near or below the phase-out thresholds. Common moves include retirement plan contributions, timing of income and expenses, paying adequate W-2 wages where the wage limit applies, and choosing the right entity. For owners close to the line, small changes can be the difference between a partial and a full deduction.

Does bonus depreciation affect the QBI deduction?

Yes. Bonus depreciation lowers business net income, which is the figure QBI is based on, so a large depreciation deduction can reduce the QBI deduction and sometimes erase it. For an owner near a threshold, that drop can pull taxable income low enough to restore the full deduction. The two should be modeled together.

How can accountants use QBI planning to offer advisory services?

QBI is a recurring, high-value planning conversation now that it is permanent. An accountant can project where a client lands against the phase-out thresholds, test entity changes and wage levels, and show the deduction saved in dollars. The deduction resets every year, so it supports an ongoing advisory relationship rather than a one-time fix. Software like TaxPlanIQ helps accountants apply advanced tax strategies into a tax plan, and run quarterly tax projections.