Quarterly Estimated Tax Calculator
Estimate how much US self-employment and income tax to set aside each quarter, right in your browser.
Uses 2024 federal tax brackets and standard deductions (labeled constants in this page). Tax figures change every year — confirm the current-year numbers on IRS.gov before relying on any result.
Frequently asked questions
How is the self-employment tax calculated?
Self-employment tax is estimated as 15.3% of 92.35% of your net self-employment income: 12.4% for Social Security (only up to the annual wage base, which you can edit) plus 2.9% for Medicare, which has no cap. Any W-2 wages you enter also use part of the Social Security wage base. This tool produces an estimate, not tax advice.
Why do I divide the total by four?
The IRS generally expects self-employed people to pay estimated taxes in four roughly equal installments across the year. Dividing your estimated annual self-employment and income tax by four gives an approximate per-quarter payment. Actual due dates and safe-harbor rules vary, so confirm with the IRS or a tax professional.
Are the tax brackets and standard deduction up to date?
The federal brackets and standard deduction built into this tool reflect 2024 figures and are clearly labeled, and the Social Security wage base is an editable field defaulted to the 2024 value. These numbers change every year, so verify the current-year figures on IRS.gov before relying on any result. This calculator is an estimate and not a substitute for professional tax advice.