CSLM10214 | FAQs: employers questions and answers: employee leaves: t/p has left but I'm making a further payment

From HM Revenue & Customs · Collection of Student Loans Manual

Suggested answer

Make Student Loan and or Postgraduate Loan (PGL) deductions in the normal way.

Your payroll software will use the earnings figure as you would calculate for employer’s secondary Class 1A NICs to determine the pay figure for Student Loan and or PGL purposes. Provide a certificate to your ex-employee detailing the deductions that have been made.

HMRC action

None.

Notes:

1.	Student Loan and or PGL deductions as calculated above should be made on all payments made to an ex-employee provided that Class 1 NICs are also deducted.
2.	If an employee has died then payments made after death will not be subject to Student Loan and or PGL deductions.