You will start to repay your loan from the April following the date you graduate or leave your course.
You will pay 9% of anything you earn over £15,000 gross per year. For more information, see the section How Repayments are Calculated
If you have an employer you will have repayment deductions taken directly from your pay slip. For more information, see the section Repaying Through Pay As You Earn (PAYE)
If you are self employed, you will need to complete a self-assessment form and return it with any payment by 31 January following the relevant tax year. For more information, see the section Repaying Through Self Assessment