Mandatory scheme pays
If the conditions are met for mandatory scheme pays, the scheme must pay the charge and reduce benefits accordingly.
To invoke this form of mandatory scheme pays, the individual must notify the scheme they wish to use ‘scheme pays’ by 31 July in the year following the tax year to which the annual allowance charge relates. It's not possible for the individual to tell the scheme before the end of the tax year in which the charge relates to. The scheme may impose an earlier deadline to give them time to process the request and pay the charge before the payment deadline.
For example, if an individual has an annual allowance tax charge for 2024/25, and meets the conditions for mandatory scheme pays, they must ensure their request is with the scheme before 31 July 2026. The scheme must then pay the charge before 14 February 2027.
This deadline will be brought forward if the individual intends to take all of their benefits or will reach age 75 in a year that they want to make use of scheme pays.
The individual needs to give the request to pay the charge from the funds to the scheme before taking benefits or reaching age 75 in these circumstances.
This will allow the scheme to make any annual allowance tax charge payments before the benefits come into payment.
Voluntary scheme pays
If the individual doesn’t meet the conditions, the scheme could (but is not obliged to) apply scheme pays on a voluntary basis.
If the scheme agrees to pay an amount of an individual’s annual allowance charge liability on a voluntary basis, the scheme is not jointly and severally liable for the tax charge and the liability for the annual allowance charge will remain with the individual. The payment made by the scheme on a voluntary basis should therefore be paid to the individual’s normal self-assessment deadline.
So, in the example above the deadline for paying the charge on a voluntary basis is brought forward to 31 January 2025.
For voluntary scheme pays, it is up to the scheme to apply whatever deadline for notification it thinks will give it enough time to process the request and pay the charge before the payment deadline.
HMRC Pensions Tax Manual - PTM056420 Annual allowance: tax charge: scheme pays: deadlines