Free Calculator
Mortgage Overpayment Calculator
Find out how much you could save by overpaying your mortgage. Adjust your monthly overpayments to see how much interest you could save and how much sooner you could become mortgage-free
MORTGAGE ADVISERS UK
Mortgage overpayment calculator
See how making extra payments could reduce your mortgage interest and help you pay off your mortgage sooner.
Your current mortgage
Years
Months
What could you save?
Compare your current mortgage payments with different regular monthly overpayments.
Extra per month
£50.00
New monthly payment
£1,300.00
Interest saved
£8,970.12
Time saved
1y 5m
Estimated payoff
In 20y 1m
Extra per month
£100.00
New monthly payment
£1,350.00
Interest saved
£16,654.44
Time saved
2y 7m
Estimated payoff
In 18y 11m
Extra per month
£150.00
New monthly payment
£1,400.00
Interest saved
£23,318.41
Time saved
3y 8m
Estimated payoff
In 17y 10m
Extra per month
£200.00
New monthly payment
£1,450.00
Interest saved
£29,159.03
Time saved
4y 8m
Estimated payoff
In 16y 10m
Extra per month
£250.00
New monthly payment
£1,500.00
Interest saved
£34,322.82
Time saved
5y 6m
Estimated payoff
In 16 years
Extra per month
£500.00
New monthly payment
£1,750.00
Interest saved
£53,240.61
Time saved
8y 8m
Estimated payoff
In 12y 10m
Extra per month
£1,000.00
New monthly payment
£2,250.00
Interest saved
£73,729.16
Time saved
12y 3m
Estimated payoff
In 9y 3m
Your current mortgage projection
Estimated interest remaining: £121,901.22
Estimated time remaining: 21y 6m
Check your lender's overpayment rules
Many mortgages allow some overpayments without an early repayment charge, but limits and rules differ by product. Check your mortgage offer or ask your lender whether regular overpayments are permitted, whether an annual allowance applies, and whether overpayments reduce your term or future monthly payments.
Your lender may calculate interest daily or apply overpayments differently from this illustration. Interest-only mortgages can have additional conditions.
Want to make your mortgage work harder?
Let's look at your mortgage options and see whether overpaying, switching deals or another strategy could suit your circumstances.
Speak to Kie about your options →Important information: This calculator provides illustrative estimates only, based on the balance, interest rate, payment and term entered. It assumes a constant interest rate and that the current monthly payment continues alongside any additional overpayment. Actual savings may differ because of lender calculations, fees, rate changes, payment dates and mortgage terms. Overpayment limits and early repayment charges may apply. Interest-only mortgages require a separate plan to repay the outstanding capital. Check with your lender before making overpayments. This calculator is not a mortgage offer or personalised mortgage advice.