The 20% deduction you were about to lose is now permanent. Here is what it actually saves you

If you run your business as a sole proprietor, partnership, LLC or S-corp, you have been getting a quiet 20% discount on your business profit before tax since 2018. It was booked to disappear at the end of 2025. It did not. The 2025 tax law made it permanent, so you keep it in 2026 and beyond. Here is the plain-English version: what the deduction is, what it actually saves you on real numbers, whether you get the full 20%, and the one thing it does not do that owners keep getting wrong.

The short version

Straight answer to what you searched. The qualified business income deduction, or QBI deduction (its formal name is the Section 199A deduction), lets most US small-business owners deduct up to 20% of their business profit before working out their income tax. Earn $80,000 of profit from the business, deduct roughly $16,000, and you pay tax as if you made about $64,000. It is one of the biggest breaks a small owner gets, and as of 2026 it is here to stay.

It applies to pass-through businesses: sole proprietors, partnerships, S-corporations and most LLCs, where the profit lands on your personal tax return. It does not apply to C-corporations, which pay the flat 21% company rate instead. Almost every owner-operated cafe, salon, gym and clinic is a pass-through, so this is almost certainly your break.

Why this is news: you nearly lost it

The deduction was never permanent. It came in with the 2017 tax law and was written to expire at the end of 2025. If nothing had changed, your 2026 profit would have been taxed in full, with no 20% taken off the top first.

The One Big Beautiful Bill Act, signed on 4 July 2025, killed that expiry date and locked the deduction in for good. One detail worth knowing, because it affects nobody's math but tells you how the fight went: an earlier draft would have raised the rate to 23%. That did not make the final law. The rate is 20%, same as it always was. So this is not a bigger break. It is the same break, no longer on a countdown.

What it is worth on your numbers

Make it concrete. Say your business throws off $90,000 of profit this year and your total taxable income sits comfortably under the limit (more on that limit below, but most owner-operators are under it):

• The deduction: 20% of $90,000 is $18,000 knocked off your taxable income.
• The tax saved: at a 22% marginal rate (use your own bracket, this is just to show the shape), that $18,000 deduction is worth roughly $3,960 less federal income tax.

That is real money that stays in your account every single year, not a one-off. And it is the money that would have vanished if the deduction had been allowed to expire: without it, you would be paying tax on the full $90,000.

One honest caveat so you do not over-count it: the deduction is the lower of 20% of your business profit or 20% of your total taxable income. For most owners the business profit is the binding number, so the simple "20% of profit" is what you actually get. Your accountant runs the exact figure on Form 8995.

Do you get the full 20%? One number decides

Here is the part that trips people up. Below a certain income, everyone gets the clean 20% with no strings. Above it, the rules get fussy.

That income line, for 2025, is $197,300 of taxable income if you file single and $394,600 if you file jointly (both indexed up a little each year). Sit under it and you take the full 20% of your business profit, full stop, whatever your trade and whatever you pay in wages.

Go over it and two tests kick in:

• A wages-and-property test. Your deduction gets capped by how much you pay in W-2 wages and how much you have invested in equipment and premises. This is why a higher-earning owner with staff usually still qualifies, and a higher-earning solo owner with no payroll can get squeezed.
• A "service business" catch. Certain fields the IRS singles out (medicine, law, accounting, consulting and similar) start to lose the deduction entirely above that income line. A medical or aesthetic clinic run by a practitioner can fall in here. A cafe, gym, salon or barbershop generally does not, so those owners keep the deduction even above the line, subject only to the wages-and-property test.

The takeaway for most readers: if your household taxable income is under roughly $197k single or $394k joint, none of this applies to you and you get the full 20%. If you are above it, it is worth ten minutes with your accountant to see which test you land in.

New for 2026: a $400 floor

Two smaller changes take effect for tax years starting in 2026. The phase-in range (the income band over which those tests gradually bite) got wider, to $75,000 for single filers and $150,000 for joint filers, up from $50,000 and $100,000. That is a technical softening that helps owners sitting just over the income line.

The one worth knowing if you have a small or side income: there is now a minimum deduction of $400 for anyone with at least $1,000 of profit from a business they actively work in. Say you do a bit of consulting on the side that nets $1,500. The old 20% math gave you a $300 deduction. The floor now lifts that to $400. Small, but it is yours, and it is indexed to rise with inflation after 2026.

The bit that matters for your exit

Now the thing owners get wrong. A permanent tax cut feels like it makes the business more valuable. It does not.

The QBI deduction lands on your personal tax return, not on the business's books. A buyer values your business on what it earns before your personal income tax, its seller's discretionary earnings, so your 20% deduction does nothing to the price someone will pay for the place. It fattens your take-home pay today. It does not move your multiple.

That is not a reason to shrug at it. It is a reason to be deliberate about where the saved tax goes. Spend it on yourself and in five years you will have had a nice run of smaller tax bills and a business worth exactly what it was worth before. Point it at the things that actually raise the sale price, recurring revenue, systems that cut your own hours, a second earner in the business so it does not all rest on you, and the tax break quietly compounds into a higher exit. Same dollars, very different outcome.