Under current ISA allowance rules for the 2012/2013 tax year, UK adults can save up to £11,280 each year which will be tax-free. Up to £5,640 of your ISA allowance can be saved in a Cash ISA, with the remainder in a Stocks & Shares ISA, or you can invest your entire ISA allowance in stocks and shares.
Since 6th April 2011, the ISA limit has increased in line with inflation on an annual basis. See below for more information on your ISA allowance, or compare ISA deals in the table: