The City regulator has launched comparative savings tables to help consumers get the best deal.
Many people's savings are languishing in poor-paying accounts
The Financial Services Authority (FSA) tables, will let consumers shop around and compare over 1,000 savings from 109 providers - about 80% of the market.
The types of accounts range from everyday deposit accounts to cash ISAs and pensioners' bonds.
The FSA already offers investments, annuities, stakeholder pensions and mortgage comparison tables.
Alan Grant, Manager of the FSA tables, said:
"There are thousands of different types of savings account and the variation in
returns available could mean a difference in returns of over 4% annually.
"The expansion of the tables to include saving products offers account holders in the UK a simple way to shop around for a new account or find a better deal."