Built to show the math
These tools turn common money questions into transparent scenarios. The goal is not to produce a confident-looking answer; it is to make the assumptions easy to inspect and change.
Editorial principles
Every calculator is paired with a guide, FAQ, and methodology page. Inputs and exclusions are visible. Results use measured language, and uncertainty is treated as part of the decision rather than a footnote.
Useful before persuasive
The calculator must remain useful without an ad click, referral, purchase, or email signup.
Assumptions in daylight
Methods explain formulas, timing, and exclusions so a result can be challenged or reproduced.
No guaranteed outcomes
Investment returns, refunds, home values, approvals, and savings are never promised.
Corrections matter
Material errors should be corrected promptly and the affected explanation reviewed with the calculator.
Scope
The site currently covers Coast FIRE, U.S. federal tax-refund reconciliation, and rent-versus-buy analysis. It does not manage money, prepare returns, recommend securities, approve loans, or replace a licensed professional. See the financial disclaimer before relying on any result.
Commercial independence
Future advertising or affiliate compensation may fund the site, but it must not change formulas or hide a better-fit option. Paid relationships should be disclosed before the first tracked link. Advertisers and partners do not receive calculator inputs from this page.