ESTIMATEIllustrative estimates for the 2026/27 tax year (6 April 2026 – 5 April 2027) as of 3 November 2026 — not financial advice. Thresholds from GOV.UK; interest rates for 1 September 2026 – 31 August 2027 from the Student Loans Company. Your payslip may differ by a pound or two because payroll rounds each pay period.
Why overpaying is different from other debt
With a mortgage or credit card, paying early always saves interest. A UK student loan is different in two ways. First, repayments are linked to income, not to the balance — paying off £5,000 early does not reduce your monthly deduction by a penny. Second, whatever is left after 25, 30 or 40 years is cancelled. If you would never reach a zero balance, every extra pound you pay today is a pound that would otherwise have been written off.
Worked examples: £45,000 balance, £100 a month extra
We compared normal repayments with adding £100 a month on top, starting in April 2026, with pay rising 3% a year and RPI at 3% after this year:
| Plan and starting salary | Normal: total repaid | With £100/mo extra | Effect |
|---|
| Plan 2, £30,000 | £12,857 · written off | £48,857 · written off | costs £36,000 more |
| Plan 2, £45,000 | £77,084 · written off | £84,459 · 25 yrs | costs £7,375 more |
| Plan 2, £60,000 | £81,962 · 21 yrs | £67,428 · 15 yrs | saves £14,535 |
| Plan 2, £80,000 | £62,632 · 12 yrs | £58,312 · 9 yrs | saves £4,320 |
| Plan 5, £35,000 | £67,861 · written off | £67,270 · 27 yrs | saves £591 |
| Plan 5, £60,000 | £56,876 · 15 yrs | £53,603 · 12 yrs | saves £3,273 |
On Plan 2 at £45,000, normal repayments total about £77,084 before the remainder is written off; with the overpayment the total becomes £84,459. The pattern is that overpaying helps only where the loan would be cleared anyway — usually higher earners — and hurts where it would not.
When overpaying can make sense
- You will almost certainly clear it. High earners with modest balances, or Plan 1 graduates with a small balance left, will repay in full regardless. Overpaying then saves interest — at 4.1% to 6% in 2026/27.
- Plan 5 graduates with strong earnings prospects. The 40-year term means many Plan 5 borrowers will repay in full, so cutting the balance reduces total interest, though the RPI-only rate makes the saving modest.
- Peace of mind. Some people simply prefer to be debt-free. That is a valid choice, as long as you know the likely cost.
When it usually doesn’t
- Your income is below or close to the threshold, or you expect career breaks, part-time work or time abroad.
- Your balance is large relative to your expected earnings — common on Plan 2 with maintenance loans.
- You have expensive debts, no emergency fund, or are not getting your full employer pension match.
Better uses of the money
A student loan does not affect your credit score, but lenders do count the monthly deduction when they assess mortgage affordability — and overpaying does not change that deduction. Saving for a deposit therefore often helps a house purchase more than overpaying. Paying into a pension through salary sacrifice both earns tax relief and cuts your student loan deduction, because repayments are worked out on pay after the sacrifice. Paying off a credit card at 20% or more always beats a loan charged at 4.1% to 6%.
How to overpay if you decide to
You can make a one-off or regular voluntary payment through your Student Loans Company online account, by bank transfer or by Direct Debit. There are no early repayment charges. Make sure the payment goes to the right plan if you have more than one, and keep an eye on your balance in the final years so you do not over-repay — the SLC can switch you to Direct Debit near the end and refund anything paid after the balance hits zero (see student loan refunds).
This is general information, not financial advice. Your own outcome depends on your balance, plan and future pay.
FAQ
Is it worth paying off my student loan early?
Only if you would repay the full balance before it is written off anyway. Otherwise, overpaying increases the total you pay, because the money would never have been collected.
Does overpaying reduce my monthly student loan repayments?
No. Monthly repayments are 9% of income above your threshold, regardless of balance. Overpaying only shortens the time until the loan is cleared, if it ever is.
Should I overpay my Plan 2 student loan?
Most Plan 2 graduates are not expected to repay in full, so overpaying usually reduces the write-off rather than saving interest. High earners with smaller balances are the main exception.
Is there a penalty for paying off a student loan early?
No. You can make voluntary repayments of any amount at any time through the Student Loans Company with no early repayment charge.
Does a student loan affect getting a mortgage?
It does not appear on your credit file, but mortgage lenders take the monthly deduction into account when assessing affordability. Overpaying does not reduce that deduction unless the loan is cleared completely.
Related student loan articles
How student loan interest is calculatedRPI, the Plan 2 sliding scale and the 6% capStudent loan repayments if self-employedSelf Assessment, 31 January and mixed incomeStudent loan when moving abroadOverseas income assessment and repaymentsWhen is my student loan written off?25, 30 or 40 years — find your datePostgraduate Loan repayments6% over £21,000, on top of Plan 2 or 5Repaying two student loans at oncePlan 1 + Plan 2, Plan 2 + PostgraduateHow to get a student loan refundBonus months, low earners and overpayingStudent loan on £45,000Plan 2 £117/mo · Plan 5 £150/moStudent loan on £60,000Plan 2 £229/mo · Plan 5 £262/moStudent loan repayment calculatorAll plans, any salary
Sources
- GOV.UK, Repaying your student loan – what you pay: 2026/27 thresholds Plan 1 £26,900, Plan 2 £29,385, Plan 4 £33,795, Plan 5 £25,000, Postgraduate Loan £21,000; 9% (6% for PGL) of income above the threshold; rules for more than one plan (read 3 November 2026).
- Student Loans Company / Department for Education, Student loans interest rates and repayment threshold announcement, 10 August 2026: RPI 4.1%; Plan 1 4.1%; Plan 2 4.1%–7.1% capped at 6%; Plan 3 (Postgraduate) capped at 6%; Plan 5 4.1% (1 Sep 2026 – 31 Aug 2027); Plan 1 threshold £28,005 from 6 April 2027.
- Department for Education press release, Interest rate cap introduced to protect Plan 2 borrowers, 7 April 2026, and written ministerial statement of 13 April 2026: 6% cap for 2026/27; Plan 2 upper interest threshold £52,885 from 6 April 2026.
- Autumn Budget 2025 (26 November 2025): Plan 2 repayment threshold frozen at £29,385 for 2027/28 to 2029/30 (reported by Which?, 5 December 2025).
- Take-home pay: HMRC 2026/27 income tax and National Insurance for England, Wales and Northern Ireland (personal allowance £12,570, 8%/2% employee NI), as used on our UK salary after tax pages.