Contact

WhatIf Labo is built and maintained by a one-person team. For questions, corrections or suggestions, email:

[email protected]

Reporting a wrong number

Contribution limits, tax brackets and exemptions change every year, and the IRS, SSA and state agencies publish the new figures on their own schedules. If a tool or article doesn't match the current rule, please include:

  • The page URL
  • The number the page shows and the number you believe is right
  • A source: the IRS revenue procedure, statute, agency notice or official statistics table

We check the source, fix the page, add a unit test when the calculation changes, and update the page's "Last updated" date.

How we handle numbers

  • Named sources with years. Limits and rates cite the publishing agency (IRS, SSA, BLS, Federal Reserve, Tax Foundation for state tables) and the tax year they apply to.
  • Estimates are labeled. When there's no official figure, a default is marked as an estimate or an example. If we can't find a number, we leave it out rather than make one up.
  • Open formulas. The calculation code is on GitHub, and every calculation function has unit tests, including cases checked against known answers.

Please don't send personal financial data

The tools run in your browser, so we don't need your salary, balances or account details to answer a question. Round numbers are fine for examples. Never email a Social Security number, account number or password.

We can't give personal advice

Results come from formulas and public data. They aren't financial, tax, legal or medical advice, and we can't answer "should I do this?" for your situation. For that, a fee-only financial planner, a CPA or enrolled agent, an attorney or a doctor is the right person.

Other things

  • Tool ideas: tell us what you're trying to calculate and how you do it today.
  • Bugs: email, or open an issue on GitHub Issues with your browser and device.
  • How data is stored and how ads use cookies: see the privacy page.