Quarterly estimated tax calculator
Self-employed? Get a quick estimate of your self-employment tax and what to set aside each quarter.
Estimate only — not tax advice. Figures are based on tax year 2026. Your real numbers depend on details this tool does not ask about. Please confirm with Alder & Finch Accounting before you rely on them.
What this estimate assumes (2026)
- Self-employment tax: 12.4% Social Security on net earnings up to $184,500 plus 2.9% Medicare, applied to 92.35% of your profit.
- Half of your self-employment tax and the standard deduction are subtracted before income tax is worked out.
- Not included: state and local taxes, the qualified business income deduction, itemized deductions, credits, and other income such as interest or capital gains.
Federal income tax brackets used
Single — standard deduction $16,100
| Taxable income up to | Rate |
|---|---|
| $12,400 | 10% |
| $50,400 | 12% |
| $105,700 | 22% |
| $201,775 | 24% |
| $256,225 | 32% |
| $640,600 | 35% |
| Above that | 37% |
Married filing jointly — standard deduction $32,200
| Taxable income up to | Rate |
|---|---|
| $24,800 | 10% |
| $100,800 | 12% |
| $211,400 | 22% |
| $403,550 | 24% |
| $512,450 | 32% |
| $768,700 | 35% |
| Above that | 37% |
Head of household — standard deduction $24,150
| Taxable income up to | Rate |
|---|---|
| $17,700 | 10% |
| $67,450 | 12% |
| $105,700 | 22% |
| $201,750 | 24% |
| $256,200 | 32% |
| $640,600 | 35% |
| Above that | 37% |
Demo figures for tax year 2026. The firm reviews and updates these each year.