About TaxWren

TaxWren is an independent website that makes free US tax calculators. It is not a tax firm, and it is not affiliated with the IRS or any state government.

What we do

We turn official tax rules into calculators that show their work. Every result lists the figures it used, where they came from and what it assumes, so you can plan ahead and know when your situation needs a professional.

We focus on the questions people ask most: how much a freelancer should set aside, what a salary is worth after tax in each state, and when quarterly payments are due.

How we keep the numbers right

• Every rate and threshold is taken from a primary source (IRS revenue procedures, the Social Security Administration and state revenue departments) and links back to it.
• Automated tests check our results against the fixed amounts printed in the IRS tax tables and against independent tax models.
• Data is updated each year when new figures are published, and every page shows when it was last checked.

The details are on our methodology and editorial policy pages.

What TaxWren is not

Our calculators give estimates for planning. They are not tax, legal or accounting advice. For decisions that matter, check with the IRS, your state or a qualified tax professional.