UK ISA Calculator 2026/27
Calculate your tax-free ISA growth, compare Cash vs Stocks & Shares ISAs, and see how ISAs can boost your savings.
Your ISA Details
£
£
Projected ISA Value
£31,696.289
Tax-free value in 10 years
£2,400
Annual contribution
£6,339.258
Tax saved
Annual Allowance Usage
2026/27 ISA allowance:£20,000
Your annual contribution:£2,400
Allowance used:12.0%
ISA Benefits Breakdown
Tax-Free Growth
✓Capital Gains Tax Free
✓Dividend Tax Free
✓Flexible Access
✓ISA vs Taxable Investment
In a taxable investment, you would pay tax on interest/dividends and capital gains. This ISA would save you approximately £6,339.258 in tax over 10 years compared to a taxable investment with the same growth.
About This Calculator
This calculator shows projected tax-free growth for UK ISAs in 2026/27. The annual allowance is £20,000. Cash ISAs typically offer 4-5% returns, while Stocks & Shares ISAs historically return 7%+ annually. Past performance doesn't guarantee future returns. ISAs are protected by the FSCS up to £85,000 per person, per provider.