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Corrections policy

Card headed "About the data" with the title: Corrections policy

A site that asks you to trust its numbers owes you an account of what happens when one of them is wrong.

What counts as an error

  • A specification that does not match its cited source
  • A source that has since been updated, leaving our figure stale
  • A calculation that does not follow the formula published on the methodology page
  • A modelled value presented without its estimate tag
  • A claim in editorial text that the data does not support

What we do about it

  1. Factual errors are corrected as soon as they are confirmed, and the source date on the affected figure is updated.
  2. Corrections that change a conclusion are noted on the page itself, not silently applied. If a verdict changes because a number was wrong, the page says so.
  3. Routine updates are not corrections. A price rise or a new model year is a data refresh, and only changes the recorded date.
  4. If we cannot verify a claimed error, we say so rather than changing the figure to whichever number was most recently asserted.

Reporting one

Use the contact page. The most useful report names the page, the specific figure, and a source that contradicts it — that combination usually gets fixed the same day.