2027/28 UK Savings Interest Tax & £12,000 Cash ISA Cap Calculator
From 6 April 2027, UK tax rates on non-ISA savings interest rise by +2 percentage points across all bands to 22% (Basic), 42% (Higher), and 47% (Additional), alongside a £12,000 annual Cash ISA cap for savers under age 65 (65+ retain the full £20,000 Cash ISA limit).
| Tax Band (Non-ISA Interest Above PSA) | 2026/27 Savings Tax Rate | 2027/28 Savings Tax Rate (From Apr 2027) |
|---|---|---|
| Basic Rate (£12,571 – £50,270, £1,000 PSA) | 20% | 22% (+2% increase) |
| Higher Rate (£50,271 – £125,140, £500 PSA) | 40% | 42% (+2% increase) |
| Additional Rate (£125,140+, £0 PSA) | 45% | 47% (+2% increase) |
| Annual Cash ISA Limit (Under Age 65) | £20,000 | £12,000 Cash cap (£8,000 S&S ISA remaining) |
| Annual Cash ISA Limit (Aged 65+) | £20,000 | £20,000 full Cash ISA retained |