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Student loan repayment calculator
See your UK student loan repayments over time. Pick your plan, then add your balance and salary. You'll see the interest that builds up, and when the balance might clear or be written off. It's an illustration on assumptions you can change, not a Student Loans Company statement.
A UK student loan behaves more like a tax than a debt: you repay a share of what you earn over a threshold, and anything left is written off after a set number of years. This shows whether yours clears or is written off, and lets you explore what paying extra would do. A picture from your figures, not advice.
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How it works
- 1Choose your repayment plan (Plan 1, 2, 4, 5 or Postgraduate). Each has its own threshold and rules for the 2026/27 tax year.
- 2Enter your balance and your salary. Add roughly which April you were first due to repay.
- 3The calculator applies your plan's threshold and repayment rate. It adds an assumed rate of interest each year.
- 4It projects your balance forward. You see when it might clear or be written off, and the total repaid and interest along the way.
Worked example
A Plan 2 loan with a £45,000 balance and a £30,000 salary, first due to repay a few years ago, on the calculator's default assumptions. The calculator projects the repayments and interest year by year and estimates when the balance clears or is written off.
Student loans behave more like a payroll deduction than a normal debt: you repay a percentage of income above a threshold, and anything left is written off after a set period. Interest and inflation assumptions are illustrative and adjustable.
Frequently asked questions
How are UK student loan repayments worked out?
You repay a percentage of income above your plan's threshold, taken through the payroll, not a fixed monthly amount. Below the threshold you repay nothing. This calculator projects that year by year.
When is my student loan written off?
Each plan has a set period after which any remaining balance is written off. The calculator estimates whether your loan clears first or reaches the write-off point, based on your salary and assumptions.
Should I overpay my student loan?
It depends on your plan, income and how likely you are to clear the loan before it's written off. Overpaying only helps if you'd otherwise repay it in full. The calculator lets you model overpayments so you can weigh the options; it isn't advice.
Does interest make my balance grow?
Interest is added to the balance, and on some plans it can grow faster than you repay, especially early on. The calculator shows the interest accrued and the closing balance each year on your chosen assumptions.
How much do I owe on my student loan?
Your exact balance is in your online account with the Student Loans Company. Enter it here with your plan and salary, and the calculator works out your repayments from there.
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