If you still haven't used your full cash ISA allowance for the 2011/12 tax year, then it's not too late, as you can apply for some accounts up until midnight on the last day, which is 5th April.
Thisismoney.co.uk illustrated just how important it is to invest your full ISA allowance each year, because someone who has been doing this since they launched in 1999 would now have amassed £40,000 with no tax to pay on any interest earned.
Once the deadline passes, however, your £5,340 allowance for this tax year will be lost if you don't make the most of it. We've put together some last minute ISA deals for you compare, from instant access to fixed rate.
The NatWest E-Cash ISA offers instant access and a competitive rate of 3.00% (or 3.50% on balances of £30,000 or more). Halifax is also offering 3% with its ISA Saver Online. You have until midnight on 5th April to open these accounts and deposit funds.
If it's a fixed rate you're looking for, the NatWest 1 Year Fixed Rate Cash ISA pays 3.00%, with a minimum deposit of £1,000.
If you want to transfer from another cash ISA provider, you can get preferential interest rates with NatWest and RBS, which are both offering 1, 2, and 3 year fixed rates of up to 4.20%.
Halifax also offers a longer term fixed rate, paying 4.50% with its 5 Year Fixed Rate Cash ISA.
See more options available with our cash ISA selections »