You can pay extra towards a Plan 5 loan at any time, on top of what comes out of your pay, and there is no penalty for doing so. Whether it is a good use of your money is a different question. For a lot of Plan 5 borrowers, the 40-year write-off means extra payments may never save them anything. This guide sets out the facts from GOV.UK and the questions that decide it. It is not financial advice.
Your normal repayments depend only on income. If, at your likely income over the years, those repayments would never clear the balance, then whatever is left after 40 years is cancelled. An extra £1,000 paid now then mostly reduces the amount cancelled at the end, not the amount you pay in total.
If, on the other hand, you are likely to clear the loan anyway, overpaying can shorten the term and reduce the interest you pay, much like overpaying any other debt.
Our calculator's model, with a £45,000 balance, a salary that stays the same and 4.1% interest every year, gives these outcomes for Plan 5:
| Steady salary | Total repaid over the term | Outcome |
|---|---|---|
| £30,000 | £18,000 | written off, £180,729 cancelled |
| £35,000 | £36,000 | written off, £136,946 cancelled |
| £45,000 | £72,000 | written off, £49,378 cancelled |
| £50,000 | £90,000 | written off, £5,595 cancelled |
| £60,000 | £69,085 | cleared in 22 years |
From £30,000 to £50,000 in this model, the normal repayments run for the full 40 years and a balance is written off. Paying extra would not reduce what payroll takes over those years; it would simply add to what you pay. Close to the point where the loan would only just be written off (around £50,000 here, with about £5,600 left at the end), the answer is finely balanced. At £60,000 the loan is cleared early, so an overpayment would cut the interest added. Real salaries usually rise over a career, which moves more people towards the "cleared" side, so run your own numbers with realistic pay.
When you are nearly done, the SLC may let you make your final repayments by Direct Debit so your employer does not take more than you owe. GOV.UK says it can take around four weeks for salary deductions to stop after the loan is repaid, and that the SLC will contact you in the final year to explain how to set this up. An overpayment from payroll at the end can be refunded; voluntary extra payments cannot.
Sign in to your online account to pay by debit card or set up a Direct Debit, or pay by bank transfer using your customer reference number (CRN) as the reference. GOV.UK warns that a transfer without your reference number will not be applied to your loan.
Try different salaries and balances in the calculator to see whether you are on course to clear your loan or reach write-off.
Sources: GOV.UK: make extra repayments · GOV.UK: when your loan is written off · GOV.UK: getting a refund · GOV.UK: how you repay · GOV.UK: how much you repay (interest). Checked 29 October 2026.
Last checked: 29 October 2026. Estimates only, not financial advice.
No. GOV.UK says you cannot get a refund of extra repayments.
No. There is no penalty for paying some or all of your loan off early.
It depends on whether you would clear the loan before the 40-year write-off. GOV.UK suggests checking your write-off date and speaking to a financial adviser if unsure.