How we calculate

Every calculator follows the published rule as closely as a web form can, shows its working, and says what it leaves out.

Where the figures come from

Fees, limits and tariff amounts come from primary sources: fee orders and statutory instruments on legislation.gov.uk, GOV.UK guidance and fee tables, the Criminal Injuries Compensation Scheme 2012, Scottish Courts and Tribunals Service fee tables, and the Office of the Public Guardian in England and Wales and in Scotland. Each calculator lists its sources at the bottom of the page. The only non-official figures are the funeral cost averages, which come from SunLife’s Cost of Dying Report and are labelled as such.

All figures sit in one data file with the date each one applies from. A calculator never has a fee typed into it directly.

Dates and changes

Where a figure changed recently, the calculator uses the date you enter to pick the right one. For example, the week’s pay cap is £751 for jobs ending on or after 6 April 2026 and £719 before, and the unfair dismissal compensatory award cap is not applied to dismissals from 1 January 2027.

Rounding

Fees are shown exactly. Calculated amounts are shown to the penny where the rule produces pence (redundancy pay, for example) and otherwise to the pound. Estimates that depend on your own inputs, such as tax on a settlement, are rounded and marked as estimates.

Dates and days

Day counts use whole calendar days in UK time. The ILR calculator follows the Home Office continuous residence guidance and does not count the days you leave or return as days abroad.

Testing

The calculation code has automated tests built from worked examples, including GOV.UK’s own figures where they exist (for example the £22,530 maximum statutory redundancy payment). The tests run before every release.

When figures are checked

Figures are rechecked when a new fee order is made, in April when employment limits and many fees change, after each Statement of Changes to the Immigration Rules, and at least every three months. The “figures checked” date on each page is changed only when someone has actually rechecked them.

What the calculators do not do

They do not decide your case. A court, tribunal, the Home Office or a scheme administrator applies discretion and facts that a form cannot capture. Each calculator says what it leaves out.

Last updated 25 October 2026