The overall personal limit for an Individual Savings Account (ISA) for the current tax year is £11,280 and this will increase to £11,520 for the new tax year commencing on April 6th. It’s important to note that if you are only contributing to a cash ISA then the maximum is exactly half the overall allowance – so £5,640 and £5,760 respectively. The other key point is that if you don’t use your ISA allowances for this tax year then they are lost – they can’t be ‘carried forward’ to the next tax year.