Cash ISA Calculator
Instantly calculate your tax-free interest earnings, total balance, and savings growth. Free, accurate tool for Easy Access and Fixed Rate ISAs in the UK.
Calculate Your Tax-Free Savings
Enter your initial deposit, monthly contributions, interest rate, and term to get an instant, personalised evaluation of your Cash ISA growth.
ISA Details
Enter your savings figures in GBP (£) to calculate tax-free growth
Savings Evaluation
Calculated tax-free balance and interest earned
Cash ISA Types
Common Cash ISA structures in the UK to help you choose the right savings account for your goals.
| ISA Type | Access to Funds | Interest Rate Profile | Best For |
|---|---|---|---|
| Easy Access Cash ISA | Anytime, without penalty | Variable (can go up or down) | Emergency funds or short-term savings goals |
| Fixed Rate Cash ISA | Locked for a set term (1–5 years) | Fixed and guaranteed | Maximising returns on money you won’t need soon |
| Notice Cash ISA | Requires advance notice (e.g., 30–120 days) | Usually higher than easy access | Disciplined savers wanting a balance of access and rate |
Cash ISA FAQ
Everything you need to know about Cash ISAs, allowances, and managing your tax-free savings.
A Cash Individual Savings Account (ISA) is a tax-efficient savings account available to UK residents. Any interest earned within a Cash ISA is completely free from UK Income Tax and Capital Gains Tax.
The total ISA allowance for the 2024/2025 tax year is £20,000. You can split this allowance across different types of ISAs (e.g., Cash ISA, Stocks and Shares ISA), but the total combined contributions cannot exceed £20,000.
An Easy Access Cash ISA allows you to withdraw your money at any time without penalty, though interest rates may vary. A Fixed Rate Cash ISA locks your money away for a set period (e.g., 1 to 5 years) in exchange for a guaranteed, typically higher, interest rate.
Yes. Withdrawals from a Cash ISA do not count towards your annual ISA allowance. Furthermore, many providers offer ‘flexible’ ISAs, allowing you to replace withdrawn funds within the same tax year without it affecting your £20,000 allowance.