Sources
Every rule our calculators use, with its source and the date we last checked it. Generated directly from the data the calculators run on.
Tax year 2024/25
Verified 17 October 2026
| Rule | Source | Type |
|---|---|---|
| Income Tax rates and allowances | gov.uk | Official |
| Scottish Income Tax bands | gov.uk | Official |
| Employee National Insurance | gov.uk | Official |
| Self-employed National Insurance (Class 2 and 4) | gov.uk | Official |
| Student loan repayment thresholds | gov.uk | Official |
| Dividend tax rates | gov.uk | Official |
| National Minimum Wage and Living Wage | gov.uk | Official |
| Blind Person's Allowance | gov.uk | Official |
| Making Tax Digital for Income Tax | gov.uk | Official |
| Statutory Maternity, Paternity and Sick Pay | gov.uk | Official |
| Pension lump sum and annual allowances | gov.uk | Official |
| New State Pension | gov.uk | Official |
Tax year 2025/26
Verified 16 October 2026
| Rule | Source | Type |
|---|---|---|
| Income Tax rates and allowances | gov.uk | Official |
| Scottish Income Tax bands | gov.scot | Official |
| Employee National Insurance | gov.uk | Official |
| Self-employed National Insurance (Class 2 and 4) | gov.uk | Official |
| Student loan repayment thresholds | gov.uk | Official |
| Dividend tax rates | gov.uk | Official |
| National Minimum Wage and Living Wage | gov.uk | Official |
| Blind Person's Allowance | gov.uk | Official |
| Making Tax Digital for Income Tax | gov.uk | Official |
| Statutory Maternity, Paternity and Sick Pay | gov.uk | Official |
| Pension lump sum and annual allowances | gov.uk | Official |
| New State Pension | gov.uk | Official |
Tax year 2026/27
Verified 18 October 2026
| Rule | Source | Type |
|---|---|---|
| Income Tax rates and allowances | gov.uk | Official |
| Scottish Income Tax bands | gov.scot | Official |
| Employee National Insurance | gov.uk | Official |
| Self-employed National Insurance (Class 2 and 4) | gov.uk | Official |
| Student loan repayment thresholds | gov.uk | Official |
| Dividend tax rates | gov.uk | Official |
| National Minimum Wage and Living Wage | gov.uk | Official |
| Blind Person's Allowance | gov.uk | Official |
| Making Tax Digital for Income Tax | gov.uk | Official |
| Statutory Maternity, Paternity and Sick Pay | gov.uk | Official |
| Pension lump sum and annual allowances | gov.uk | Official |
| New State Pension | gov.uk | Official |
Property taxes
Verified 18 October 2026
| Tax | Source | Rates from |
|---|---|---|
| Stamp Duty Land Tax (England & NI) | GOV.UK | 2025-04-01 |
| Land and Buildings Transaction Tax (Scotland) | Revenue Scotland | 2024-12-05 |
| Land Transaction Tax (Wales) | Welsh Government | 2024-12-11 |
Market data
- Bank of England Interactive Database: Bank Rate (IUDBEDR) and quoted mortgage rates (IUMBV34, IUMBV37, IUMBV42), refreshed daily.
Our current-year figures are also checked automatically every month against these official pages. See how we keep rules up to date.