Corrections log
Every figure we have got wrong, with the date, the page, what it said and what it says now. Publishing our own mistakes is the only version of a trust signal that costs anything.
| Date | Page | Was | Is | Found by |
|---|---|---|---|---|
| 06 Sept 2026 | /countries/united-kingdom/ gb.income_tax.bands.ty2026 | The additional rate was applied from £112,570 of taxable income, overstating income tax on a £150,000 gross by £628.50 (£54,331.50 against £53,703). Incomes with taxable income below £112,570, including the £60,000 case the site had a test for, were unaffected. | The additional rate applies from £125,140 of taxable income. The ingest had subtracted the £12,570 personal allowance from every published band boundary. That is correct for the basic rate limit but wrong at the top, because the allowance has already tapered to zero by £125,140: GOV.UK states "You do not get a Personal Allowance on taxable income over £125,140." The bands are now read from the GOV.UK table stated on income after allowances, which needs no arithmetic. | Cross-checking our own figures against the OECD Tax Database over SDMX, which publishes the UK higher-rate threshold as £125,140 where our rules held £112,570. |
| 06 Sept 2026 | / gb.income_tax.bands.ty2026 | The homepage calculator started the additional rate at £137,710 of gross income, understating income tax by £243 at a £130,000 gross (£44,460 against £44,703). The error ran from £125,140 to £137,710 of gross and was invisible below that. | The additional rate starts at £125,140. The injector lifts each taxable-income boundary by the personal allowance so it can run against gross, but it baked in the standard £12,570 at build time instead of using the tapered allowance it already computes at runtime. By £125,140 the allowance is zero, so there was nothing to add. The boundary is now emitted as an expression in the runtime allowance, which is correct at every income. | Grepping the built homepage for the corrected £125,140 boundary after fixing the rule. It was absent, and £137,710 was there instead. |
What counts as a correction
Any published figure that was wrong: a misread band, a threshold applied to the wrong year, a rate that moved and we did not notice. Typos in prose are not corrections and do not appear here, because burying real errors in a list of them is its own kind of dishonesty.
Telling us
Point at the page and the line. The fastest thing you can send is the official clause you think we misread: the arithmetic is open on the source of record and downloadable from the open data, so a disagreement can usually be settled without either of us guessing at the other’s method. Write to [CONTACT EMAIL].