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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
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Capital Gains Tax Free
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Dividend Tax Free
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Flexible Access
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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.

Maximize Your ISA

Learn more about UK ISAs and tax-efficient investing.

ISA GuideInvesting GuideTax Year Checklist