Editorial Policy

How we build a calculator

Every calculator on Fiscalgrove starts from a documented, first-principles formula — the same one a bank, lender, or government calculator would use — which we write out in full on the calculator's own page, not just in the code. Where a calculation depends on a statutory figure (like UK Stamp Duty bands or US PMI removal thresholds) or a widely-used lending convention (like the 28/36 DTI rule), we cite the primary source directly rather than a secondary summary.

How often we re-check figures

Statutory and government-set figures (tax bands, published average rates) are re-verified against their primary source at least every three months, and immediately after any relevant government announcement (a Budget, a rate-threshold change, and so on). Pages carrying this kind of figure show a visible "Rates verified" stamp with the date of the last check and a link to the source we checked it against.

Corrections

If a figure or explanation on Fiscalgrove turns out to be wrong or out of date, we correct it as soon as we verify the report — usually within 2 business days of being notified. Material corrections (anything that would change a calculated result) update the "Last updated" date at the top of the affected page. You can report a suspected error via our Contact page.

Independence

Fiscalgrove does not accept payment, free products, or any other consideration in exchange for favourable coverage of a specific lender, broker, or financial product. Where the site carries advertising, it is served by a third-party ad network and is not tied to editorial content or calculator outputs in any way — see ourPrivacy Policy and Cookie Policy for details on how that advertising works.