PoundWise Team: Compare the AER, not just the advertised interest rate, and check whether it is variable or fixed and how often interest is paid. Look at access rules, withdrawal limits, minimum deposits, account fees and whether the rate includes a temporary introductory bonus. Check the provider’s eligibility requirements and whether your deposits are protected by the Financial Services Compensation Scheme, where applicable. It is also worth checking the provider on the FCA register and reviewing the rate after any bonus period ends.