FAQ

What does this calculator estimate?

It estimates annual federal tax on untaxed income and divides that estimate into four equal quarterly payments.

Does this include self-employment tax?

Yes. The calculator estimates self-employment tax and includes the half-SE-tax deduction before federal income tax.

Does this include state taxes?

No. This tool is federal-only.

Are the tax brackets current?

This version uses 2025 federal brackets and standard deduction assumptions shown on the site.

Does this calculate IRS safe harbor rules?

No. It is a straight estimate, not a safe harbor or underpayment penalty tool.

Can this be used for freelance income?

Yes. It is especially useful for freelance and contractor income that does not have tax withheld.

Is this a filed tax result?

No. It is an informational estimate and should be verified when accuracy is material.

Why are related calculators shown here?

Related calculators help answer nearby questions such as after-tax salary, bonus tax, and 1099 vs W-2 comparisons.