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Student Loan Overpayment Calculator

Find out if making voluntary overpayments is financially worthwhile for your plan and income.

Your Details

Adjust the inputs and assumptions. Results update instantly.

Threshold: £27,295 | Rate: 9%

Advanced: override plan parameters
£35,000
£40,000
£100

Annual overpayment: £1,200

Assumptions

Used for Plan 1/4: lower of RPI or Base+1%.

Overpayment Analysis

Overpayments may not be financially optimal.

Your loan is projected to be written off without fully repaying under standard repayments.

Current Interest Rate

5.7%

Interest Saved

£58,136

Standard Repayment Time

30 years (to write-off)

With Overpayments

30 years (to write-off)

Time Saved

None

Why might it not be worthwhile?

If you’re unlikely to clear the balance before the write-off date, extra payments usually **increase** your lifetime payments. Overpaying makes most sense when you expect to fully repay (e.g., higher or fast-rising income).

Lifetime Paid (standard)

£20,803

Lifetime Paid (with overpay)

£56,803

Interest (standard)

£143,965

Interest (with overpay)

£85,829

Understanding Overpayments

Overpayments reduce your balance faster and can save interest, but they’re not always optimal. If you won’t clear the loan before write-off, voluntary payments usually mean paying more over your lifetime.