Student loan repayments feel like a tax — 9% of everything you earn above the threshold. So should you make voluntary overpayments to clear it faster? For most borrowers the answer is no. But for some high earners on older plans, paying it off early can save thousands in interest. This guide helps you decide.
How student loan write-off works
- Plan 1: written off 25 years after the April you were first due to repay (or age 65)
- Plan 2: written off 30 years after the April you were first due to repay
- Plan 4: written off 30 years after the first April following graduation (or age 65)
- Plan 5: written off 40 years after the first April following the end of your course
Any outstanding balance at write-off is cancelled — you owe nothing more. This is the key insight: if you will not repay the full balance before write-off anyway, overpaying is just giving the government extra money.
When early repayment makes sense
Paying early is worthwhile if you will repay the loan in full through normal deductions AND the interest is accumulating faster than you can earn on that money elsewhere. This typically applies to:
- High earners (£50K+) on Plan 1 or Plan 4 with relatively small balances
- Anyone with a balance under ~£10,000 who is close to clearing it anyway
- Plan 2 borrowers earning £60K+ with balances under ~£30,000 who will clear within 15 years
When NOT to overpay
- You earn under £40,000 and have a large Plan 2 balance (£40K+) — you probably will never clear it
- You are within 5 years of write-off
- You could use the money for higher-return investments (ISAs, pension)
- You have higher-interest debt (credit cards, overdrafts)
The interest rate factor
Plan 2 interest is RPI + up to 3% (depending on income), currently around 7–8%. Plan 1 and 4 interest is the lower of RPI or the Bank of England base rate + 1%. If the interest rate on your loan exceeds what you could earn investing that money, and you will repay in full anyway, overpaying saves you the difference.
How to check your projected balance
Log into your Student Loans Company account and check your current balance and repayment history. Estimate your annual repayments using your salary: (salary − threshold) × 9%. If your balance at write-off date will still be positive, overpaying is not recommended.
See your current repayment amount
Use the income tax calculator with your student loan plan selected to see exactly how much you repay each month. For more detail on repayment thresholds, see our student loan repayments guide.