About Calcora

Calcora publishes free, transparent US finance calculators. Every tool is built on data sourced directly from the IRS, state revenue authorities, the Social Security Administration, and the Federal Reserve.

Our approach

Most online calculators are black boxes — you input numbers, get a result, and have to trust it. We take the opposite approach: every calculator shows the bracket math step by step, cites the official source, and displays a "last verified" date so you can see exactly when the underlying data was checked.

What we cover

Our tools span three categories: tax and income (paycheck, 1099 self-employment, bonus, capital gains), loans and mortgage (mortgage, refinance, auto, student loan, personal loan), and investing and retirement (401(k), Roth IRA, compound interest, FIRE, Social Security).

Editorial standards

We do not accept payment for favorable calculator results, biased recommendations, or content placement. Affiliate relationships, where they exist, are disclosed clearly on the relevant pages and never affect the math or the conclusions of our calculators.

Not financial advice

Calcora provides educational tools and information. We are not a registered investment advisor, tax preparer, or law firm. For decisions affecting your finances, consult a licensed CPA, CFP, or attorney.