2026 tax year

What your profession can deduct

Schedule C is one form. The deductions that fill it are not the same for a notary and a nurse.

Most self-employment tax advice stops at the form. The form is the easy part, one page, and the same page whether you shoot weddings or drive a truck. What differs is what legitimately goes on it, and that is where the money is: a signing agent's mileage, a driver's per diem, a photographer's Section 179 gear, a minister's housing allowance that is exempt from income tax and taxable for self-employment tax at the same time.

What a deduction is actually worth

More than people expect. A business deduction comes off self-employment tax, income tax and state tax at once. And then shrinks the QBI deduction, which quietly claws back a fifth of it. In a state with no income tax, every $1,000 you legitimately deduct is worth:

Net profitTax saved per $1,000 deductedEffective
$40,000 $231 23.1%
$100,000 $305 30.5%
$200,000 $297 29.7%

The middle row is the peak, and the fall after it is real: past the Social Security wage base the self-employment part of the saving drops from 15.3% to 2.9%, and the higher income-tax bracket does not quite cover the gap. A deduction is worth most to a middling earner.

That is the federal floor, add a state income tax and every figure rises. It is also why the reverse hurts: an expense you cannot substantiate is not a small problem, because the deduction you lose was worth about a third of itself.

Deductions every business can take

Before anything trade-specific: a retirement contribution through the business, self-employed health insurance, the Augusta rule, employing your own children. These apply whatever you do, they are worth more than most of the expenses people carefully receipt, and they are the ones most often missed.

The full deductions checklist →

By profession

Two rules that catch nearly everyone

Education that qualifies you for a new trade is not deductible. Education that maintains or improves the skills of a business you already run is. The same certification is deductible for a working coach and not deductible for someone about to become one.

Money that passes through you is not yours in either direction. Deposits you collect for vendors are not income, and vendor payments you pass on are not deductions. Booking both inflates a business several times over, which matters the moment anyone looks at gross receipts.

Related

General information about how these deductions work, not tax advice. Whether a particular expense is deductible depends on facts this page does not have, check with a tax professional before claiming anything here.