Can an S Corporation Increase Your QBI Deduction?

If you're a successful sole proprietor, you may already have heard one of the most common pieces of small-business tax advice:

"You should consider becoming an S corporation."

Usually, that conversation focuses on potentially reducing self-employment taxes. But for some higher-income business owners, there may be another significant reason to consider an S corporation: the QBI deduction.

The Qualified Business Income deduction under Section 199A can allow eligible business owners to deduct up to 20% of qualified business income. And beginning in 2026, this deduction is permanent.

However, higher-income business owners can run into limitations based on W-2 wages and qualified property. That's where operating as an S corporation can sometimes create an opportunity that doesn't exist for a sole proprietor with no employees. (refer to posts: What is the Best Structure for My Business? and S Corporation: Common Mistakes When Converting)

What Is the Section 199A QBI Deduction?

Section 199A provides many owners of pass-through businesses with a deduction of up to 20% of qualified business income.

It can apply to qualifying income from sole proprietorships, partnerships, LLCs and S corporations.

But "up to 20%" is important.

Your actual deduction depends on several factors, including your taxable income, the type of business you operate, W-2 wages paid by the business and certain qualified business property.

We've covered the broader calculation, including what happens when someone owns several companies, in How Does the QBI Deduction Work If I Own Multiple Businesses?.

For this article, we're focusing on a different question: Can changing from a sole proprietorship to an S corporation help a high-income business owner qualify for a larger QBI deduction?

Why Does Income Affect the QBI Deduction?

For 2026, the Section 199A taxable-income threshold is $201,750 for single and head-of-household taxpayers and $403,500 for married couples filing jointly.

The phase-in range then extends to $276,750 for single/head-of-household filers and $553,500 for married couples filing jointly.

Below the applicable threshold, an eligible business owner generally doesn't need W-2 wages or qualified property to support the basic 20% QBI calculation.

Once taxable income rises above the applicable range, however, those factors can become extremely important.

For a qualifying business owner above the upper end of the phase-in range, the deduction can be limited based on calculations involving:

• 50% of the W-2 wages paid by the business; or
• 25% of W-2 wages plus 2.5% of the unadjusted basis of certain qualified property.

That can create a problem for a successful sole proprietor who has no employees and owns little or no qualifying depreciable property.

What Happens If a Sole Proprietor Has No W-2 Wages?

Consider a single business owner operating as a sole proprietor.

The business generates $400,000 of net income, and the owner's taxable income is $370,000.

Because $370,000 is above the 2026 upper phase-in amount of $276,750 for a single taxpayer, the wage and property limitations apply.

Now assume the business has no employees and no qualifying property.

Despite generating $400,000 in business income, the owner doesn't have W-2 wages or qualified property available to support the regular Section 199A deduction.

Under the 2026 rules, the taxpayer may still qualify for the new statutory minimum QBI deduction of $400, assuming the applicable requirements are met.

But compare $400 with what a 20% deduction on hundreds of thousands of dollars of qualifying business income could potentially be worth.

That's where an S corporation becomes interesting.

How Can an S Corporation Help With the QBI Deduction?

An S corporation owner who performs services for the company generally must receive reasonable compensation as an employee.

In other words, the S corporation pays the owner a W-2 salary.

That salary creates something our sole proprietor didn't have:

W-2 wages.

And those wages can potentially help support the Section 199A deduction when the business owner's income is above the applicable threshold.

This doesn't mean you can simply choose whatever salary produces the biggest tax deduction. Compensation must be reasonable based on the work performed and the particular facts and circumstances.

But let's look at an example to see why this can matter.

Example: $400,000 Business Income and a $100,000 S Corp Salary

Assume the same business owner elects to operate through an S corporation and that $100,000 represents reasonable compensation for the services the owner provides.

For simplicity, we'll ignore some smaller adjustments and focus on how the strategy works.

The S corporation pays the owner a $100,000 W-2 salary.

That reduces the remaining business income to approximately $300,000.

The potential 20% QBI deduction on $300,000 is:

$60,000.

But because this taxpayer's income is above the applicable phase-in range, we also have to consider the wage limitation.

Fifty percent of the S corporation's $100,000 of W-2 wages equals:

$50,000.

In this simplified example, the wage limitation therefore reduces the potential $60,000 QBI deduction to $50,000.

There is also an overall taxable-income limitation to consider, but with $370,000 of taxable income in this example, that limitation would not reduce the $50,000 result.

Compare that with the $400 minimum deduction available in our sole-proprietor example.

That's a dramatic difference.

Does an S Corporation Also Reduce Self-Employment Taxes?

Potentially, yes—and this is why the analysis gets even more interesting.

A sole proprietor generally pays self-employment tax on qualifying net earnings from the business, subject to the applicable Social Security and Medicare rules.

An S corporation works differently.

The owner's reasonable W-2 salary is subject to payroll taxes, but qualifying S corporation distributions above that salary generally are not subject to self-employment tax.

In the example we're using, the original analysis estimates more than $19,000 in payroll-tax savings after moving from the $400,000 sole proprietorship to an S corporation paying a $100,000 reasonable salary.

Then there's the additional income-tax savings associated with increasing the QBI deduction from the $400 minimum to approximately $50,000.

At a 35% federal income-tax rate, the increased QBI deduction alone could represent more than $17,000 in additional federal income-tax savings in this simplified example.

Combined, the example produces potential annual tax savings of more than $36,000.

That's why entity selection deserves more analysis than simply asking, "Should I form an LLC?"

Does Every Sole Proprietor Save Money by Becoming an S Corporation?

No.

An S corporation isn't automatically better, and the example above should not be interpreted as suggesting that every business owner earning $400,000 should pay himself or herself exactly $100,000.

There are several variables to consider.

An S corporation creates additional costs and responsibilities, which can include:

• payroll processing;
• payroll tax filings;
• a separate business tax return;
• additional bookkeeping and accounting;
• state and local tax considerations;
• reasonable-compensation requirements; and
• additional administrative responsibilities.

Your particular business, income, other household income and tax situation determine whether the savings justify those costs.

What Is Reasonable Compensation for an S Corporation Owner?

This is one of the most important pieces of the calculation.

You cannot simply pay yourself a $20,000 salary from a highly profitable company because a smaller salary produces lower payroll taxes.

The IRS requires an S corporation shareholder who performs substantial services for the corporation to receive reasonable compensation for those services before taking non-wage distributions.

Determining reasonable compensation can involve factors such as:

• the work you perform;
• your responsibilities;
• your experience and training;
• the amount of time devoted to the business;
• what comparable businesses pay for similar work; and
• the financial circumstances of the company.

There's also an interesting balancing act with Section 199A.

A higher salary creates more W-2 wages that may help support the QBI deduction—but salary itself isn't qualified business income.

So increasing salary can simultaneously increase the wage limitation while reducing QBI.

This is exactly the kind of situation where running the numbers before making the decision matters.

What About Doctors, Lawyers, Accountants and Other Service Businesses?

There is an important limitation to this strategy.

Section 199A has special rules for what the tax code calls specified service trades or businesses (SSTBs).

This category can include businesses involving health, law, accounting, consulting, athletics, financial services, brokerage services, investing and certain other fields.

For owners of these businesses, the QBI deduction phases out as taxable income increases and can disappear above the applicable income range.

Creating W-2 wages through an S corporation does not override the SSTB income limitation.

So the strategy we're discussing is most relevant to higher-income owners of businesses that remain eligible for Section 199A after the phase-in range.

What Changed With Section 199A in 2026?

There are several reasons this strategy deserves another look in 2026.

Most importantly, Section 199A is now permanent.

The deduction had been scheduled to expire after December 31, 2025. Tax legislation enacted in 2025 eliminated that sunset.

The 2026 rules also expanded the phase-in ranges and introduced the new $400 minimum deduction for qualifying taxpayers.

For business owners considering whether the administrative cost of an S corporation is worthwhile, permanence matters.

If changing your entity structure produces meaningful annual savings, you're no longer evaluating that decision based on a tax provision that could disappear the following year.

Sole Proprietorship or S Corporation: Run the Numbers

There's no universal income level where Ken-Mar Tax would tell every business owner, "Now you need an S corporation."

Two businesses earning exactly the same amount can have very different answers because of reasonable compensation, other household income, employees, business assets, retirement contributions, state and local taxes and the nature of the business itself.

But if you're a successful sole proprietor or single-member LLC owner whose taxable income is approaching or exceeding the Section 199A thresholds, it's worth examining the numbers.

In particular, consider an S corporation analysis if:

• your business is generating substantial profit;
• you're currently reporting the business on Schedule C;
• you have few or no employees;
• the business owns little qualifying depreciable property;
• your taxable income is above the Section 199A threshold; and
• your business isn't subject to the high-income SSTB exclusion.

The question isn't simply whether an S corporation saves payroll taxes.

The better question is what happens to your entire tax return when the business becomes an S corporation.

Before You Elect S Corporation Status, Talk to Ken-Mar Tax

An S corporation can be an extremely useful tax-planning tool, but the election should follow the analysis—not the other way around.

Ken-Mar Tax can compare your current sole-proprietor tax situation with an S corporation scenario, including reasonable compensation, payroll taxes and the potential Section 199A QBI deduction.

If you're earning significantly more than you were when you originally started your business, this is especially worth revisiting. The business structure that made perfect sense when you were starting out may not be the structure that makes the most sense today.

Before changing entities, run the numbers. The potential difference can be substantial—and with Section 199A now permanent, the impact can continue year after year.