The cut-off and start times, for the current tax year then going into the new tax year are listed below. These are the times that your current tax year allowance will expire, and the time that your new tax year allowance will become available to invest in:
Current tax year cut off time
2023/24 - ISA subscriptions/contributions - must be received by 6:30pm on the 5th April.
New tax year start
2024/25 - ISA subscriptions/contributions can only be received on the 6th April (you will not be allowed to contribute to the new tax year ISA allowance before 00:01 on the 6th April).
Please note: you can still open an ISA account/portfolio before the 6th April, ready to invest in for the new tax year for 2024/25; clients will simply have to wait for the 6th April before they can add funds to that ISA account.