Editorial policy
How the figures here are sourced and checked, and how commercial relationships are handled.
Sources #
Tax rates, thresholds and deadlines come from HMRC and GOV.UK. Where a page states a rate, it links to the source it came from and shows the date that source was last checked.
Verification dates #
Every page carrying a rate shows when it was last checked against the source. Rates change, usually at the start of a tax year and sometimes mid-year. A page with an old check date may be out of date, and the date is shown so you can judge that yourself rather than assuming it is current.
Calculations #
All rates live in one configuration file rather than being scattered through the code, so an update happens in one place. Calculators show their full working rather than only a final figure, so you can check the logic against your own understanding.
Where a calculator deliberately leaves something out, such as Scottish Income Tax bands or student loan repayments, the page says so rather than quietly ignoring it.
Advertising and affiliate links #
The site carries advertising. Some links to accounting and invoicing software are affiliate links, meaning a commission may be paid if you sign up through them.
Two rules govern this:
- No commercial relationship changes what a calculator outputs
- Software recommendations reflect what the products actually do, and a product will be criticised where it deserves it regardless of whether it pays a commission
AI assistance #
Drafting and code on this site is produced with AI assistance. Every rate, threshold and calculation is verified against the primary source before publication, and every page is reviewed by a person before it goes live. AI is not treated as a source.
Corrections #
Errors are corrected promptly and logged publicly on the corrections page rather than edited away silently. Report one.