2026 Section 199A: Proprietorship or S Corporation?

If you operate your business as a proprietorship, a partnership, or an S corporation, tax code Section 199A can give you a deduction of up to 20 percent of your qualified business income. And there’s good news for business owners: the deduction is now permanent. Beginning in 2026, several changes also make the rules more favorable for some higher-income taxpayers.

For 2026, if your taxable income is $403,500 or less (married, filing jointly) or $201,750 or less (single or head of household), you generally qualify for the deduction regardless of your type of business. But once your taxable income rises above those thresholds, the calculation becomes more complicated.

The tax code essentially divides businesses into two camps. “In-favor” businesses can continue to qualify for the deduction, subject to additional limitations at higher income levels. Out-of-favor “specified service trades or businesses” (SSTBs), such as many consulting, doctors, dentists, and professional practices, face much tougher rules. For 2026, an SSTB loses the deduction entirely once taxable income exceeds $553,500 for married couples filing jointly or $276,750 for single filers.

There is, however, an important 2026 improvement. The phase-in range is now 50 percent wider—$75,000 above the threshold for single filers and $150,000 for married couples filing jointly. That means the limitations phase in more gradually and the potential deduction can survive at higher income levels than under the previous rules.

Where an S Corporation Can Help

If you are an in-favor business owner with relatively high taxable income and little or no W-2 wages or depreciable business property, operating as a proprietorship can limit your Section 199A deduction to the new $400 minimum.

An S corporation may provide a way to create the W-2 wages needed to unlock a larger deduction. The S corporation pays you a reasonable salary, and those wages can become an important part of the Section 199A calculation. This strategy applies primarily in a high earning sole proprietorship with no employees.

For example, suppose an in-favor sole proprietor has $400,000 of business income and $370,000 of taxable income in 2026. Without qualifying wages or property, the Section 199A deduction could be limited to $400.

Now suppose the business operates as an S corporation and pays the owner a reasonable $100,000 salary. The salary creates W-2 wages for purposes of the Section 199A calculation while reducing the business’s qualified business income to $300,000. Depending on the owner’s complete tax situation, that change could produce a substantially larger Section 199A deduction while potentially reducing payroll taxes.

The exact result depends on your income, reasonable compensation, business assets, filing status, and other tax factors. An S corporation is not automatically the better choice, and the additional costs and administrative requirements of operating an S corporation need to be considered.

Two Rules That Can Preserve the Deduction

If your business mixes in-favor and out-of-favor activities, two de minimis rules may help:

1. If out-of-favor receipts are less than 10 percent of gross receipts (5 percent if receipts exceed $25 million), the entire business may be treated as in favor.
2. You can operate two separate trades or businesses—one in favor and one out of favor—by maintaining separate books, invoices, and, ideally, employees for each activity.

Careful bookkeeping and a properly structured business can therefore make a significant difference in your Section 199A deduction. But the separation must reflect genuine separate business activities; simply relabeling part of a business does not create a qualifying trade or business.

Also note that the new $400 minimum deduction does not rescue a pure SSTB above the applicable income ceiling. That can make it especially important to understand whether a legitimate in-favor business activity exists and how your business should be structured.

Next Steps: Run the Numbers Before You Make a Change

The 2026 rules give some high-income business owners a new reason to examine whether a proprietorship or S corporation makes sense. But the right answer depends on more than the Section 199A deduction. Payroll taxes, reasonable compensation, accounting and payroll costs, state taxes, administrative requirements, and other tax considerations can all affect the result.

If you are considering an S corporation election or want to know how the 2026 Section 199A rules apply to your business, run the numbers with your tax professional before making the change.

If you want to discuss the Section 199A rules and how they may apply to your business, please contact TrueBlaze.