Free tools · tax year 2026
Free tax calculators for the self-employed
Three quick calculators for contractors, freelancers and small service businesses, using the 2026 IRS figures. They run in your browser: nothing you type is sent anywhere or saved.
Mileage deduction calculator
Business miles times the 2026 IRS standard rate, with the July 1 rate change built in.
Open the calculator →Self-employment tax calculator
Social Security and Medicare on your net profit, the 2026 wage base cap, and the half you deduct.
Open the calculator →Quarterly estimated tax calculator
A rough quarterly payment from your expected profit, with the 2026 brackets and due dates.
Open the calculator →Estimates only, not tax advice. Each calculator shows the 2026 figures it uses and where they come from. Your actual tax depends on your whole return; check anything important with a tax professional.
The numbers behind the calculators
Every calculator here starts from a number you have to know: miles driven, net profit, expected income. Daily Invoice Maker keeps those numbers as you work: invoices and payments, expenses and receipts, and a mileage log. At tax time, Tax Prep sets out the Schedule C figures for you or your accountant.
Free demo: Windows, Mac and Linux, no account and no card. It covers 7 invoices, 7 customers and 7 expenses, with a watermark on PDFs. Full version $149.95 once, $59.99 for one year on one computer, or $5.95 a month.