You can ask HMRC Clearances Team to confirm the tax and NICs implications of a salary sacrifice arrangement once it is in place. However, this is not a requirement.
HMRC would want to see:
- evidence of the variation of terms and conditions (if there is a written contract)
- payslips before and after the variation
This can be emailed to the HMRC Clearances Team at hmrc.southendteam@hmrc.gsi.gov.uk.
Or sent in the post to
HMRC Clearances Team
Alexander House
21 Victoria Avenue
Southend-on-Sea
Essex
SS99 1BD