Compare the AER, not just the headline rate, and check whether it is variable, introductory or dependent on a bonus period. Confirm the minimum deposit, withdrawal limits, notice requirements and any conditions, such as paying in regularly. Check whether the account is covered by the FSCS and whether your total deposits with the same banking licence stay within the protection limit. Finally, consider whether an ISA could be more suitable for your circumstances, and review the latest guidance on gov.uk about savings interest and tax.