You need to inform student finance that you have left the course. If you receive a payment after the date you left, you will be asked to repay it immediately. However, the amounts you received while you were still studying on the course are repaid in the same way as a complete loan. If you are earning over the repayment threshold, deductions will start in April following your course withdrawal. The payments are taken at the same percentage as if you completed your online Master’s degree- see above.