Should I Pay Off My Student Loan Early?

Only if you would have cleared the balance anyway. The test is simple: project your standard 9% (or 6%) deductions to the write-off date. If they clear the loan with years to spare, an overpayment shortens the term and saves interest. If they do not, the overpayment just lowers the amount that is cancelled. The table sets out the numbers that drive that test for each plan^[source].

Why Plan 2 and Plan 5 rarely clear

On a £40,000 salary, a Plan 2 graduate with £50,000 owing repays £955 a year (9% of the income above £29,385). At that salary the interest rate is 5.5%, which adds about £2,728 a year. The balance grows, and a £5,000 overpayment does not change the fact that the rest is written off after 30 years.

Plan 5 looks kinder because interest is RPI only, 4.1% at the moment, but the threshold is lower and the term is 40 years. On £35,000 with £45,000 owing you repay £900 a year against £1,845 of interest. Because the interest only tracks inflation, leaving the balance alone costs you nothing in real terms, which is the opposite of a reason to overpay.

Why Plan 1, Plan 4 and the Postgraduate Loan are different

A Plan 1 borrower on £40,000 with £8,000 left repays £1,179 a year against £328 of interest at 4.1%, so the balance clears in well under a decade. Paying it off in one go saves the remaining interest and stops the deductions immediately. The same logic applies on Plan 4 once the balance is small: on £45,000 with £15,000 owing, repayments of £1,008 a year outrun £615 of interest.

The Postgraduate Loan is the clearest case for overpaying. It carries the highest rate, 6.0% under the cap in force since 1 September 2026, the lowest threshold at £21,000, and a balance of at most £13,206 for a 2026/27 Master's. On £45,000 you repay £1,440 a year against about £792 of interest, so it does get cleared, and every pound you overpay saves interest at the highest rate you are paying. If you hold both loans, direct any overpayment here first.

One caution for Plan 1 and Plan 4 borrowers near the end of the term: if the write-off date is closer than the date your deductions would clear the balance, do not overpay. The balance is about to be cancelled.

Before the overpayment analysis, a reminder of the features that make UK student loans unlike conventional loans:

• Income-contingent repayments: you only make repayments when your income exceeds the threshold for your loan plan^[source]
• Automatic deductions: repayments are taken through PAYE or self assessment based on your income
• Set percentage: repayments are 9% of income above the threshold (6% for the Postgraduate Loan), regardless of your balance
• Eventual write-off: any remaining balance is cancelled after 25 to 40 years, depending on your plan
• Interest accrual: rates vary by plan and, on Plan 2, by income

Together these mean a student loan behaves more like a graduate tax than a loan for most borrowers. If your income never rises high enough to repay the full amount before the write-off date, you will never repay the full balance however much you borrowed.

Voluntary extra payments on a student loan are worth making in a small number of situations:

1. You're Highly Likely to Repay in Full Anyway

If your income trajectory means you will repay the full loan before the write-off date, extra payments save you money by reducing the interest that accrues over the life of the loan.

This typically applies to:

• High earners whose deductions comfortably outrun the interest every year
• Those with relatively small loan balances compared to their income
• Graduates with steep career progression early in their career
• People with Plan 1 or Postgraduate Loans, which have smaller balances

2. You're Near the Tipping Point

If you are near the break-even point where you might or might not repay in full, extra payments could tip you into the "will repay in full" category and save money over the term.

For example, if you are projected to repay 90% of your loan before the write-off date, targeted extra payments could clear the debt and stop interest accruing on the full balance for the maximum period.

3. You Have Plan 1 Loans

Plan 1 loans are more likely to justify overpayment because:

• The repayment threshold is lower (£26,900), so you start repaying at lower income levels
• Loan balances are typically smaller, because tuition fees were far lower before 2012
• More borrowers fully repay before the 25-year write-off

4. You Have Strong Psychological Reasons

Some borrowers prefer to be debt-free even when it is not the mathematically optimal choice. If student debt causes you real stress and you can afford the payment, the peace of mind may outweigh the strict financial calculation.

That is a personal choice, but make it knowing the trade-off.

For many graduates, voluntary extra payments are a poor financial decision. Here is why:

1. You Won't Repay in Full Before Write-off

If your income trajectory suggests you will not repay the full loan before the write-off date, extra payments simply reduce the amount that will be cancelled. You are paying money you would never otherwise have had to pay.

2. Better Investment Opportunities Exist

Even if you will repay in full, there may be better uses for the money if the expected return elsewhere exceeds the interest rate on your student loan.

Consider these alternatives:

• Pension contributions: tax relief at your marginal rate, plus any employer match, plus investment growth
• Stock market investments: long-term returns have historically exceeded student loan interest, with more risk
• Employer-matched savings schemes: an instant 100% return on your contribution
• Property deposit: can get you on the housing ladder sooner
• Emergency fund: financial security has real value

If your student loan interest rate is lower than the return you can reasonably expect from these alternatives, you are better off putting the money elsewhere.

3. You Have Higher-Interest Debts

If you have other debts with higher interest rates, such as credit cards, personal loans or car finance, it is almost always better to pay those off before making extra payments on your student loan.

Priority for debt repayment should typically be:

1. High-interest consumer debt (credit cards, payday loans)
2. Personal loans
3. Car loans
4. Student loans (only if you will repay in full)
5. Mortgage

4. You Might Need Financial Flexibility

Once you make a voluntary overpayment, you cannot get that money back if your circumstances change. Think twice if you might need to:

• Take a career break
• Return to education
• Start a family
• Move to a lower-paying but more fulfilling job
• Deal with unexpected expenses

Keeping the money accessible is often worth more than a slightly shorter loan term.

To decide whether overpaying is right for you, work through these four steps in order:

For most graduates with Plan 2 or Plan 5 loans, the analysis points to not making voluntary overpayments. Many borrowers would be better off investing in pensions or ISAs, or simply keeping the money.