Disclaimer

Last updated: 30 September 2026.

Not financial advice

Overpay or Invest provides general information, a modelling tool and written guides. It is not financial, tax, legal or investment advice, and nothing on this site — including the calculator, its results, the guides and any example figures — is a personal recommendation. We are not authorised or regulated by the Financial Conduct Authority. Your circumstances are unique, so please consider taking independent, regulated advice before making a large decision such as a lump-sum overpayment.

Guides and figures

• The guides summarise public information, mainly from GOV.UK and the Student Loans Company, in plain English. They can be incomplete, and they can be out of date if the rules change after a guide was written or last checked.
• Worked examples and tables use the 2026–27 thresholds and rates held on this site. They are illustrations, not a calculation of what you personally owe or will repay.
• The official rules, and your own Student Loans Company account, always take precedence. Where a guide and GOV.UK disagree, please follow GOV.UK and tell us at hello@overpayorinvest.com.
• Guides about tax, pensions, mortgages, Self Assessment, living abroad or benefits are general pointers only. Your circumstances may differ, so check with the relevant body or a qualified adviser.

Results are estimates

• The calculator is an annual approximation of a monthly repayment system, so results are directional, not exact.
• It assumes steady salary growth, no career breaks, and that the assumptions you enter (such as investment returns) hold true. Real life won’t follow them exactly.
• The rules are based on 2026–27 thresholds and interest rates. Government policy on student loans can change, including the terms of existing loans.
• It models one loan at a time.

Investing carries risk

Investments can fall as well as rise, and you can get back less than you put in. An assumed return is not a promise or a forecast. Overpaying a student loan cannot be undone: money paid in cannot be taken back.

Check your own figures

Use your loan statement or your online Student Loans Company account for your actual balance, plan type and repayment start date, and check current rules on gov.uk.

Liability

We work to keep the information accurate but do not guarantee it is complete or up to date. To the fullest extent permitted by law, we accept no liability for any loss arising from reliance on this site. Nothing here limits any liability that cannot be excluded by law.

Independence

This site is not affiliated with the Student Loans Company, the UK government or any lender or investment provider.