Grab the P60 or payslips for the tax year you think went wrong - any year back to 1998 counts, there's no time limit.
Payroll deducts in any month you cross the monthly limit - bonuses, overtime and part-year work all trigger deductions that the annual rules never required.
Each one is a separate refund reason the Student Loans Company accepts.
Your verdict
Yes - you can likely claim back
Refunds go back to 1998 with no time limit, and claiming is free - the SLC will check its records against yours.
Estimate, not advice - the SLC calculates the exact figure from its records. Confirm on GOV.UK.
One honest warning
A below-threshold refund goes back onto your loan balance. If you're unlikely ever to clear the loan before it's written off - true for most Plan 2 borrowers - it's effectively free money. If you're on track to repay in full, it just delays the finish line slightly. Refunds for money taken in error (too early, wrong plan, already cleared) have no downside at all.
How to claim (free, usually a few weeks)
Repayments only fall due on total annual income above your plan's threshold. Deductions in a year you stayed below it are reclaimable in full.
| Plan | Annual threshold | Rate above it |
|---|---|---|
| Plan 1 | £26,900 | 9% |
| Plan 2 | £29,385 | 9% |
| Plan 4 (Scotland) | £33,795 | 9% |
| Plan 5 | £25,000 | 9% |
| Postgraduate Loan | £21,000 | 6% |
Thresholds change each April - for a past year's check, the SLC applies that year's threshold, which may differ from the figures above.
| Check | Estimated refund | |
|---|---|---|
While you're checking - is anything else taking too much?
Student Loan Refund Checker by TaxFly — free UK tax calculators