CSLM10015 - FAQs: employers questions and answers: P45 has a 'Y' in the SL box but is for last year

Suggested answer

If there is a 'Y' in the Student Loans Box on the form P45 then you should start making deductions from the next pay-day. 

Repayment of the Student Loan and or Postgraduate Loan may continue for many years.

You can find more information about student loans on the gov.uk pages