Editorial and Corrections Policy

Effective 6 September 2026

UKCalc publishes independent calculators, reference tables, and plain-English explanations of UK tax and personal-finance rules. Our purpose is to make published government figures easier to understand and calculate with. UKCalc is not HMRC and does not provide personalised advice.

Sources and verification

Rates, thresholds, allowances, and deadlines are taken from primary sources wherever possible, including GOV.UK and HMRC, Revenue Scotland, and the Welsh Revenue Authority. Important source links appear on the relevant page. Calculator changes are checked against boundary cases and representative examples in the automated test suite before deployment.

Tax-year updates

Current-year pages identify the tax year they cover. We review calculation data when official publications change and before a new tax year begins. A page's review date is changed only when its facts or calculation method have been materially checked; a routine site deployment is not treated as a content review.

Calculations and assumptions

Calculator outputs are deterministic estimates based on the inputs supplied. Each calculator describes material assumptions and exclusions. Actual payroll or tax outcomes may differ because of tax codes, pay-period rounding, benefits in kind, reliefs, multiple employments, or circumstances the calculator does not collect.

Corrections

Reports sent to hello@ukcalc.co.uk are checked against the cited primary source and the calculation code. Material errors are corrected as soon as practical. When an error could have changed a user's interpretation or result, the affected page will carry a dated correction note describing what changed. Minor spelling, formatting, or accessibility fixes may be made without a correction note.

Commercial independence

Advertising or affiliate relationships do not change calculator formulas, outputs, rankings, or editorial conclusions. Sponsored material, if introduced, will be labelled so it can be distinguished from independent editorial content.

Accountability

Content is published by the UKCalc editorial team. For a description of the project, its data sources, and its calculation process, see About UKCalc. Questions, correction requests, and source suggestions can be sent to hello@ukcalc.co.uk.