Because you don't pay any tax on Cash ISAs, they can be a great way to make the most of your savings. The government set annual limits on the amount you can pay into a Cash ISA (also called Individual Savings Accounts), but interest rates can differ between providers, so it's important to make sure that you get the right deal.
From 6th April 2013, the maximum amount that a UK adult can pay into a Cash ISA is £5,760 per year. You can deposit up to this amount from 06/04/2013 until 05/04/2014.
However, if you don't use your full allowance in one year then you can't carry it over into the following year (ie: you lose it). Over recent years, the economic situation has meant that many product providers have dropped their interest rates significantly. If you already pay a regular monthly amount into a Cash ISA, you might find that the interest you are getting could be as low as 0.1%!
Some accounts will also allow you to transfer a lump-sum from your existing Cash ISA, without losing it's tax-free status. This could make a big difference if you have been saving regularly into a Cash ISA over a few years.
Use our handy best buy table to compare a range of cash ISA rates or select 'search all' to customise your results and compare the interest rates to other savings accounts.