CSLM10125 - FAQs: employers questions and answers: income exceeds threshold for 1 week only
Suggested answer
You should make Student Loan and or Postgraduate Loan deductions for any pay periods in which the borrower's earnings exceed the threshold.
Do not take account of previous earnings as the deductions are non-cumulative.
If, after the end of the year the borrower can prove that they earned less than thethreshold, a repayment of any deductions paid may be made by the Student Loans Company.