Student loan overpayment calculator

Calculations run in your browser.

Total payments saved by extra repayments

-£30,000.00

Student loan overpayments breakdown
Payments without overpayments	£49,192.83
Payments with overpayments	£79,192.83
Balance written off without overpayments	£125,193.94
Balance written off with overpayments	£55,894.55
With overpayments: repayment time	Not repaid before write-off

Projected student loan balance

Required onlyWith extra payments

Projection values

Projected student loan balance
Scenario	Month	Balance
Required only	0	£50,000.00
Required only	12	£52,101.83
Required only	24	£54,259.27
Required only	36	£56,474.30
Required only	48	£58,748.93
Required only	60	£61,085.32
Required only	72	£63,485.69
Required only	84	£65,952.40
Required only	96	£68,487.90
Required only	108	£71,094.76
Required only	120	£73,775.69
Required only	132	£76,533.53
Required only	144	£79,371.24
Required only	156	£82,291.94
Required only	168	£85,298.92
Required only	180	£88,395.62
Required only	192	£91,585.66
Required only	204	£94,872.84
Required only	216	£98,261.17
Required only	228	£101,754.84
Required only	240	£105,358.28
Required only	252	£109,076.16
Required only	264	£112,913.36
Required only	276	£116,875.05
Required only	288	£120,966.67
Required only	300	£125,193.94
With extra payments	0	£50,000.00
With extra payments	12	£50,868.27
With extra payments	24	£51,716.08
With extra payments	36	£52,540.68
With extra payments	48	£53,339.15
With extra payments	60	£54,108.31
With extra payments	72	£54,844.81
With extra payments	84	£55,545.01
With extra payments	96	£56,205.04
With extra payments	108	£56,820.77
With extra payments	120	£57,387.76
With extra payments	132	£57,901.26
With extra payments	144	£58,356.22
With extra payments	156	£58,747.21
With extra payments	168	£59,068.44
With extra payments	180	£59,313.75
With extra payments	192	£59,476.53
With extra payments	204	£59,549.73
With extra payments	216	£59,525.85
With extra payments	228	£59,396.85
With extra payments	240	£59,154.19
With extra payments	252	£58,788.74
With extra payments	264	£58,290.77
With extra payments	276	£57,649.91
With extra payments	288	£56,855.09
With extra payments	300	£55,894.55

A negative saving means paying more overall in this scenario. One loan, fixed current threshold and entered constant interest/growth assumptions. Write-off timing is supplied by you, not assessed. Ignores future policy, interest subsidies, payroll rounding and timing differences. Voluntary repayments are normally non-refundable and may be wasted on a balance that would be written off.

Calculation details

Projection

Each month the balance accrues interest, then the annual-threshold repayment estimate plus any extra payment is deducted, capped at the outstanding balance. Earnings grow at the entered annual rate; the current plan threshold stays fixed. The remaining balance is written off at your entered horizon.

Interpreting savings

A positive saving means total payments fall with overpayments in the scenario. A negative result means you pay more overall, often because the standard schedule would have left a balance to be written off. This ignores the investment return you could have earned on extra payments.

Limits

One UK loan only, constant entered interest and growth, no interest subsidies or future threshold/policy changes. The model approximates monthly payroll deductions and does not determine write-off eligibility. Voluntary repayments are normally non-refundable; confirm actual balance and settlement terms with SLC.

Sources

Checked 2026-10-25. Estimate only, not financial advice.

Total payments saved by extra repayments-£30,000.00