Rates service

Machine-readable UK income tax, National Insurance and student loan rates for the Salary Calculator UK iOS app. Not a web page for people.

Current tax year: /rates/current.json
Permalink: /rates/2026-27.json

This host exists so that publishing a Budget change can never disturb salarycalculatorapp.co.uk. Figures are verified against gov.uk and gov.scot; the sources are listed inside the payload.