If you’re leaving it until the last minute to open a cash Isa, you may need to act before March 26 – a full ten days before the deadline. You need to use your cash Isa allowance of up to £20,000 for this tax year by April 5 – if you miss this deadline, you lose this year’s allowance. Once your money is in a cash Isa, every penny of interest ends up with you rather than the taxman. But this year you may need to open your Isa much earlier than usual because the deadline falls on Easter Sunday. But even if they let you go up to the wire, you need to open your account in time to deposit the money.

Source: Daily Mail March 18, 2026 21:34 UTC