ISA & Savings Calculators
& Guides
Make the most of your £20,000 ISA allowance. Compare account types, project compound growth and plan your savings goals. All free, no sign-up.
Most popular · ISA & Savings
ISA Calculator
Track your ISA allowance and project growth across Cash, Stocks & Shares, and Lifetime ISAs.
ISA & savings calculators
6Lifetime ISA Calculator
See the impact of the 25% government bonus on your first home or retirement savings.
Open calculatorHelp to Buy ISA Calculator
Calculate the government bonus on your Help to Buy ISA savings.
Open calculatorCompound Interest Calculator
Project how your savings grow with compound interest over time.
Open calculatorSavings Goal Calculator
Work out how long it will take to reach a savings target.
Open calculatorInvestment Return Calculator
Calculate total returns including dividends and capital growth.
Open calculatorInflation Calculator
See what a sum of money is worth in today's terms after inflation.
Open calculatorISA guides
2ISA & savings in 2026/27
Making the most of your ISA allowance
ISA allowances in 2026/27
The overall ISA subscription limit remains £20,000 per tax year. You can split this across any combination of Cash ISA, Stocks & Shares ISA, Innovative Finance ISA and Lifetime ISA, though LISA contributions (up to £4,000) count towards the £20,000 cap. Junior ISAs have a separate allowance of £9,000 per child.
ISAs are free from income tax and capital gains tax on growth inside them. Unused allowance cannot be carried forward, each allowance resets on 6 April. The most important rule: use it or lose it.
The Lifetime ISA bonus
The Lifetime ISA is particularly powerful for first-time buyers: the government adds a 25% bonus on up to £4,000 per year, meaning up to £1,000 free annually. Open one between ages 18 and 39; contribute until 50. For a first home the property must cost £450,000 or less.
The 25% withdrawal penalty applies if you withdraw for any reason other than buying a first home, turning 60, or terminal illness, it claws back the bonus plus a portion of your own savings, so plan carefully before opening a LISA if you might need the money for other purposes.
| ISA type | Annual limit | Best for |
|---|---|---|
| Cash ISA | Up to £20,000 | Short-term savings, emergency fund |
| Stocks & Shares ISA | Up to £20,000 | Long-term growth, tax-free investing |
| Lifetime ISA | Up to £4,000 | First home or retirement (under 40) |
| Innovative Finance ISA | Up to £20,000 | Peer-to-peer lending, higher risk |
| Junior ISA | Up to £9,000 | Saving for a child's future |
Common ISA questions
Can I open multiple ISAs in the same year?
Yes: since April 2024 you can open and contribute to multiple ISAs of the same type in a single tax year (for example, two different Cash ISAs). The only limit is that your combined contributions across all ISAs cannot exceed £20,000 in the tax year. The Lifetime ISA has its own £4,000 cap within the £20,000.
Do I pay tax on ISA withdrawals?
No: withdrawals from a Cash ISA or Stocks & Shares ISA are completely tax-free. The Lifetime ISA is the exception, withdraw for any reason other than buying your first home or retiring at 60+, and you pay a 25% withdrawal penalty that claws back the bonus and a slice of your own savings.
What is a Flexible ISA?
A Flexible ISA lets you withdraw money and replace it in the same tax year without the replacement using up more of your allowance. For example, if you've paid in £20,000 and withdraw £5,000, you can put the £5,000 back in the same tax year without breaching your limit. Not all ISA providers offer this, check your provider's terms. Lifetime ISAs and Junior ISAs are not flexible.
Can I inherit my spouse's ISA?
Yes: when a spouse or civil partner dies, you can inherit their ISA tax-free status through an Additional Permitted Subscription (APS). The APS allowance equals the value of the deceased's ISAs at death and is separate from your own annual allowance. You have three years from the date of death (or 180 days after estate administration) to use it.