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Calculators
Regular overpayment

Regular overpayment calculator

See how making additional payments may assist you in paying off your mortgage faster and reducing the overall interest cost.

Your details

Outstanding mortgage balance The total amount remaining on your mortgage. You can find this on your latest mortgage statement.

Mortgage term (years) The number of full years left before your mortgage is completely repaid.

Mortgage term (months) If your remaining term includes extra months (1–11), add them here to get a precise estimate.

Current interest rate Enter the annual interest rate you’re currently paying on your mortgage. You’ll find this in your mortgage agreement or latest statement.

Regular overpayment amount The extra amount you plan to pay each month, on top of your regular payment. Overpayments can reduce the total interest you pay and shorten your mortgage term.

Your results

Interest savings The total interest you could save by regularly overpaying your mortgage.
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Term reduction (Years) The amount of years you could shave off your mortgage term by making regular overpayments.

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Term reduction (Months) The amount of months you could shave off your mortgage term by making regular overpayments.

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New mortgage payment

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Current payment Your monthly payment based on your current mortgage terms before overpayments.

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Current interest to pay

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See how overpayments could change your mortgage

Use our overpayment calculator to estimate how paying extra towards your mortgage could affect your balance, interest and remaining term.

Your result can help you see how regular or lump sum overpayments may reduce the amount of interest you pay over time. It can also show how much sooner you could repay your mortgage if your lender applies the overpayment to reduce the term.

Mortgage overpayments can be useful, but they are not always the right move. Some lenders set annual overpayment limits, and early repayment charges may apply if you pay too much during a fixed or discounted deal.

How an overpayment calculator can help

Estimate your interest savings

See how extra payments could reduce the interest charged over the life of your mortgage.

Compare payments options

Test regular overpayments and lump sums to see how each option could affect your balance and term.

Check before paying extra

Get a clearer starting point before checking overpayment limits, charges and whether paying extra fits your wider finances.

Check your mortgage options across 100+ lenders

Muttuo Mortgages can compare mortgage options across 100+ lenders, helping you review your current deal, overpayment limits, early repayment charges, rates and remortgage options before you decide.

Speak to Muttuo

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Your overpayment calculator questions answered

An overpayment calculator estimates how extra mortgage payments could affect your balance, interest and mortgage term.

It can help you see the potential difference between paying your normal monthly amount and paying more than required.

Yes, overpayments can reduce the amount of interest you pay if they lower the mortgage balance on which interest is charged.

The overall saving depends on your mortgage balance, interest rate, remaining term, overpayment amount and how your lender applies the payment.

They can, depending on how your lender treats the overpayment.

Some borrowers choose to keep monthly payments similar and reduce the mortgage term. Others may use overpayments to reduce future monthly payments. It is worth checking how your lender handles this before paying extra.

Many mortgage deals allow you to overpay up to a certain amount each year without charge.

A common limit is up to 10% of the outstanding mortgage balance per year, but this can vary by lender and product. Always check your mortgage offer or speak to your lender before making an overpayment.

Yes, you may be charged if you exceed your lender’s overpayment allowance during an early repayment charge period.

This is more common during fixed, tracker or discounted mortgage deals where early repayment charges apply.

That depends on your mortgage deal, interest rate, overpayment limits and wider financial goals.

Overpaying may reduce interest and shorten your term, while remortgaging may help you secure a better rate or change your mortgage structure. It is worth comparing both before deciding.

Your results are for guidance only

Your results are for guidance only and are based on the information you enter. They are not a mortgage offer, approval in principle or financial advice.

The actual effect of overpayments may depend on your mortgage balance, interest rate, remaining term, repayment type, lender rules and how your lender applies extra payments.

Some mortgage deals include overpayment limits or early repayment charges. You should check your mortgage offer, speak to your lender or get mortgage advice before making overpayments.

Your home may be repossessed if you do not keep up with repayments on your mortgage.