About ISA Calculator
An Individual Savings Account (ISA) allows you to save or invest money tax-free.
The current annual allowance is £20,000. Any returns (interest or capital gains) are tax-free.
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Allowance: £20,000 per tax year (2025/26).
Tax-Free Value
₹279,433
FV = P * (1 + r)^n + c * [ ((1 + r)^n - 1) / r ] * (1+r)Where:
Inputs:
Start = £0, Annual = £20k, Rate = 6%, Years = 10
Result:
Value = ~£279,432
Investing the full ISA allowance annually can lead to significant tax-free growth.