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Mortgage Calculator

Estimate monthly mortgage payments, total interest, loan amount and loan-to-value based on your property price, deposit, interest rate and mortgage term.

Enter your details

£
£
%
yrs
20%

This calculator uses the standard repayment mortgage formula and gives an estimate only. It does not include fees, insurance, or taxes.

Estimated monthly payment
£0.00
Loan amount: £0.00
Loan amount
£0.00
Total repaid
£0.00
Total interest
£0.00
Loan-to-value
0%

Mortgage breakdown

Home price £0.00
Deposit £0.00
Interest rate 0%
Term 0 years

How This Mortgage Calculator Works

This mortgage calculator helps you estimate your monthly mortgage payments based on the property price, deposit, interest rate, and mortgage term you enter.

First, the calculator works out your loan amount by subtracting your deposit from the property price. It then applies a standard repayment mortgage formula to estimate your monthly payment over the full mortgage term.

Alongside your monthly payment, the calculator also shows the total amount repaid, total interest paid, and your loan-to-value ratio. This gives you a clearer picture of both your monthly cost and the long-term cost of borrowing.

Property price The purchase price of the home you want to buy.
Deposit The upfront amount you pay yourself, reducing the mortgage you need.
Interest rate The annual rate charged by the lender on the amount you borrow.
Mortgage term The number of years over which the mortgage is repaid.
Monthly payment Your estimated regular repayment each month based on the figures entered.
Loan-to-value (LTV) The percentage of the property value that you are borrowing.
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Example Mortgage Calculations

These examples show how different property prices, deposits, interest rates, and mortgage terms can affect monthly mortgage payments. Use them as rough guides only.

£300,000 home
Deposit£60,000
Mortgage£240,000
Interest rate4.75%
Term25 years
Estimated payment: £1,368 / month
£350,000 home
Deposit£70,000
Mortgage£280,000
Interest rate4.60%
Term25 years
Estimated payment: £1,579 / month
£400,000 home
Deposit£80,000
Mortgage£320,000
Interest rate4.50%
Term30 years
Estimated payment: £1,620 / month
£500,000 home
Deposit£100,000
Mortgage£400,000
Interest rate4.70%
Term30 years
Estimated payment: £2,070 / month

Mortgage Calculator FAQs

This mortgage calculator gives an estimate based on the figures you enter. Your actual mortgage payment may differ depending on lender fees, product type, introductory rates, insurance, and other borrowing costs.
Many lenders may accept deposits from 5% of the property value, although a larger deposit can improve your LTV and may help you access better mortgage rates.
Loan-to-value, or LTV, is the percentage of the property’s value that you borrow. For example, if you buy a £300,000 home and borrow £240,000, your LTV is 80%.
You may be able to reduce your monthly mortgage payment by increasing your deposit, borrowing less, securing a lower interest rate, or extending the mortgage term.
No. This calculator focuses on mortgage repayment estimates only. It does not include lender fees, valuation fees, legal costs, stamp duty, insurance, or other purchase costs.

Related tools

House Affordability Calculator Estimate how much property you may be able to afford. Stamp Duty Calculator Estimate property tax costs for a home purchase. Mortgage Overpayment Calculator See how extra payments could cut interest and term.