Start by deciding when you might need the money: an easy-access account offers flexibility, while a fixed-term account may pay a higher rate but restrict withdrawals. Compare the AER, which shows the yearly interest rate including compounding, and check whether the rate is an introductory bonus or has conditions. Make sure you understand any minimum deposit, withdrawal limits and access rules, and check whether the provider is covered by the FSCS, which protects eligible savings up to its current limit if a bank fails. You can also check GOV.UK guidance on savings interest and tax, as your personal allowance depends on your circumstances.