About DollarShuffle
DollarShuffle is a set of 24 free financial calculators built to be as precise as the official rules they follow: the IRS and every state's tax formulas, federal loan program rules, and live rates from the agencies that publish them.
What we believe a calculator owes you
The real rules
Not rules of thumb: the actual withholding formulas, tax brackets, credit phase-outs and loan program limits, with the source named on every page.
The whole picture
Full schedules, charts, side-by-side comparisons and the option to import your own data or export every result as a CSV file.
Your privacy
No accounts and no sign-ups. Calculations run in your browser, imported files never leave your device, and a shareable link holds only the inputs you choose.
How we work
Every formula is checked against independent calculations and official examples, tested automatically on each change, and reviewed against its sources every June and December. The methodology page lists every data source, how often it refreshes, and the limits of what the calculators estimate, and the editorial policy explains who writes and reviews each page, how we use AI tools, and how to report an error.
DollarShuffle is operated by Aidept Solutions, LLC, a California company. Reach us at aj@aideptsolutions.com or see the contact page. DollarShuffle provides estimates for educational purposes. It is not financial, tax or legal advice. The site may show advertising, which never affects any result.