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Understanding the Qualified Business Income (QBI) Deduction

Small Business April 10, 2026

If you own a sole proprietorship, partnership, S corporation, or certain trusts, you may be eligible for a deduction based on your share of qualified business income. It's one of the more valuable — and more misunderstood — provisions available to small business owners.

The Basic Idea

In general terms, the deduction allows eligible business owners to deduct a portion of their qualified business income, reducing the amount of that income subject to tax. It applies to income passed through to your personal return rather than income earned by a traditional C corporation.

Where It Gets Complicated

The deduction phases out or becomes limited at higher income levels, and the rules differ depending on whether your business is considered a "specified service trade or business" (a category that includes many professional services). Wage and capital investment in the business can also factor into the calculation at higher income levels.

Why This Isn't a DIY Calculation

Because the rules involve your total taxable income, your business structure, and in some cases W-2 wages paid by the business, the deduction really needs to be calculated as part of your overall return rather than estimated in isolation. Getting it right can mean a meaningful difference in your tax bill.

If you think your business might qualify, bring your financials to our next planning conversation and we'll walk through what it actually means for your specific numbers.

This article is for general educational purposes only and isn't personalized tax, legal, or financial advice. Contact me to talk through how this applies to your situation.