Self-employed tax calculators

Solo 401(k) Contribution Calculator: Find the most you can put into a Solo 401(k) for 2026 as a sole proprietor or S corp owner.

SEP IRA Contribution Calculator: Work out your 2026 SEP IRA contribution from your net profit or S corp salary.

Self-Employment Tax Calculator: Calculate your 2026 self-employment tax the way Schedule SE does.

1099 Tax Calculator: Estimate the tax on your 1099 income and how much of each payment to set aside.

Quarterly Estimated Tax Calculator: Find the federal estimated payment that protects you from the underpayment penalty, and when each one is due.

DoorDash Tax Calculator: Estimate the tax on your delivery or rideshare income after the mileage deduction.

W-2 vs 1099 Calculator: Compare a salaried job and a contract for the same work after tax and benefits.

S Corp Tax Savings Calculator: See what an S corp election saves at your profit and salary, after the extra costs of running payroll.

QBI Deduction Calculator: Estimate the 20% qualified business income deduction for 2026.

Home Office Deduction Calculator: Compare the two ways to deduct a home office and see which gives you more.

Section 179 Calculator: Calculate how much equipment cost you can deduct this year under Section 179.

Employee Cost Calculator: Add up what an employee really costs beyond the wage.