Self-employed tax deductions for 2026, and what each one is worth
A deduction is worth your tax rate on it, not its face value; for the self-employed, where it is claimed decides whether it also cuts SE tax.
Tax saved by the deduction
$1,517
Each $100 of expense really costs you $70
| Self-employment tax saved | $706 |
| Federal income tax saved | $446 |
| State income tax saved | $365 |
Computed by Radif Partners from IRS documents for tax year 2026 · How we calculate · no email asked, nothing sold
Self-employed people deduct in two places, and the difference matters. Business expenses on Schedule C, such as supplies, software, advertising, insurance, travel, half of business meals, car use at 72.5 cents a mile through June 2026 and 76 cents after, a home office and equipment (with section 179 expensing up to $2,560,000 in 2026), lower profit, so they cut both self-employment tax and income tax. Deductions on Schedule 1, which are half of SE tax, health insurance premiums and contributions to a SEP IRA or solo 401(k) (up to $72,000 in total for 2026), lower income tax only. For a single filer with $60,000 of profit, a $1,000 business expense saves $231 of federal tax: $141 of SE tax and $89 of income tax, so it really costs $769. Spending money only to get a deduction always leaves you poorer.
The calculator answers one question: if I spend this amount on the business and deduct it, how much less tax do I pay? Enter profit before the expense, the expense, your filing status and state. It reruns the whole return twice and shows the difference for SE tax, federal income tax and state tax. The QBI deduction shrinks slightly with each expense, and the result includes that effect.
SEP IRA ceiling at your profit
SEP IRA maximum
$22,304
| Solo 401(k) maximum | $46,804 |
| 2026 overall cap | $72,000 |
Two kinds of deduction
Everything you claim on Schedule C comes off profit before Schedule SE sees it. A dollar there saves about 14.13 % in SE tax below the Social Security cap, plus income tax at your bracket. Deductions on Schedule 1 come after the business is done: they lower adjusted gross income but leave SE tax alone. The table shows what one $1,000 business expense is worth at different profits.
| Net profit | SE tax saved | Income tax saved | Total saved | Real cost of $1,000 |
|---|---|---|---|---|
| $30,000 | $141 | $74 | $216 | $784 |
| $60,000 | $141 | $89 | $231 | $769 |
| $90,000 | $141 | $164 | $305 | $695 |
| $150,000 | $141 | $164 | $305 | $695 |
| $250,000 | $27 | $348 | $383 | $617 |
Two things stand out. The saving never reaches the expense, and it is lumpy: a profit crossing a bracket or the Social Security base changes the value of the next dollar. That is why buying equipment in December to cut the bill rarely makes sense unless you needed it anyway.
Business expenses on Schedule C
The IRS standard is an ordinary and necessary cost of your trade. For most freelancers the list is familiar: software subscriptions, a phone and internet line in proportion to business use, advertising, a website, professional fees, contract labor, business insurance, rent for an office, supplies, and state or local licenses. Business meals are deductible at half (Schedule C instructions). Travel counts when you are away from your tax home overnight.
The car
Either keep actual costs and multiply by the business share, or use the standard rate: 72.5 cents a mile from January to June 2026 and 76 cents from July (IRS mileage rates). 8,000 business miles split evenly come to $5,940, plus parking and tolls. The mileage deduction page explains the log you need to keep.
Home office and equipment
A room used only and regularly for the business can be deducted at $5 a square foot up to 300 square feet, or by its share of real costs on Form 8829; the home office guide compares both. Computers, cameras and furniture are capital assets, but section 179 lets you expense them in the year you start using them, up to $2,560,000 for 2026, reduced once total purchases pass $4,090,000 (Rev. Proc. 2025-32). Few freelancers come anywhere near those limits.
Simplified method: square feet × $5
Deduction
$900
| Counted area (300 max) | 180 sq ft |
| SE tax saved alone | $127 |
Deductions on Schedule 1
Half of self-employment tax
Automatic once you file Schedule SE: half of the tax goes to Schedule 1, line 15. On $90,000 of profit that is $6,358. You do nothing for it, but it explains why your adjusted gross income is lower than your profit.
Health insurance
Premiums for medical, dental and qualified long-term care insurance for you, your spouse and dependents go on Schedule 1, line 17, for months when you were not eligible for an employer's subsidized plan (Form 7206 instructions). With $90,000 of profit, $6,000 of premiums lowers federal income tax by $939; SE tax does not move. See the health insurance deduction for the limits.
Retirement contributions
A SEP IRA or a solo 401(k) takes contributions that are deducted on Schedule 1, line 16. For a self-employed person the employer contribution is 20 % of net earnings after half of SE tax (Publication 560); a solo 401(k) adds an employee deferral of up to $24,500, with $8,000 more from age 50 and $11,250 at ages 60 to 63, all within $72,000 for 2026 (Notice 2025-67). At $90,000 of profit the SEP maximum is $16,728, which cuts federal tax by $1,969 this year; the money is taxed when withdrawn.
Paying other people
Money paid to subcontractors, assistants or designers is deductible as contract labor on Schedule C. It comes with a paperwork duty: for payments made after 2025, a business that pays someone $2,000 or more for services in a year files a Form 1099-NEC, and it should collect a Form W-9 first so it has the payee's taxpayer identification number (Publication 15). Without one, backup withholding at 24 % may apply. Hiring employees is a different matter, with payroll taxes of your own; the employer share of those taxes is deductible as a business expense too.
What is not deductible
Federal income tax and SE tax are not business expenses, even though half of the latter is an adjustment. Personal spending does not become deductible because it touches the business now and then; when an item serves both, such as a phone or a car, only the business share counts, and you need records showing the split. Premiums on a life insurance policy that benefits you are not deductible either (Publication 334). The QBI deduction is separate from all of this: it is figured after the others and is covered on its own page.