A cost calculator earns trust by being checkable. If a result looks wrong, a formula does not match what the page says, or a prefilled price no longer matches the provider’s page, please report it.
How to report
Send your report to [email protected].
For a calculator or formula problem, include
- The page URL. If you used the tool’s share button, the copied link already contains your numeric inputs, which is the easiest way to let us reproduce the result.
- The result the tool showed.
- The result you expected, and how you worked it out.
- Your browser, if the problem is about display or keyboard use.
For a price or policy problem, include
- The page URL and the statement or prefill that is wrong.
- A link to the provider’s own current page showing the correct value.
Add a reply address if you would like to hear back.
Please leave out
Seller names, phone numbers, property addresses, deal documents or account details. The tools never need them, and neither do we.
What happens next
An editor reproduces the issue against the published equations on the methodology page. A confirmed formula or validation bug is fixed in the shared calculator engine together with a new automated test for that case. A changed price is updated in the source record that feeds every page. Material corrections, meaning any change that could alter a reader’s result or decision, are listed below with the date.
Correction log
No material corrections have been recorded since this publication launched on October 16, 2026. Source checks and ordinary maintenance are listed on the relevant pages.