UK Mortgage Calculator
Estimate monthly repayments, total interest, and total borrowing cost from your property price, deposit, term, and interest rate.
Estimated repayment
£0 / month
Based on property price, deposit, term, and interest rate
Deposit 0.0%
Mortgage amount
£0
Total interest
£0
Total repaid
£0
Loan-to-value
0.0%
| Year | Opening balance | Annual payments | Principal repaid | Interest paid | Closing balance |
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Assumptions
Estimates assume a standard repayment mortgage with a fixed interest rate over the full term and do not include fees, insurance, taxes, or future rate changes.
Most UK home loans are repayment mortgages. Each monthly payment includes interest and a portion of the amount borrowed, so your balance gradually falls over time.
Early payments usually include more interest, while later payments include more principal. That is why total interest can still be significant over long terms, even with steady payments.
Loan-to-value (LTV) is your mortgage amount as a percentage of the property price. For example, if you buy at £400,000 with an £80,000 deposit, your mortgage is £320,000 and your LTV is 80%.
Lower LTV often improves the rates available from lenders, because you are borrowing a smaller share of the property value.
A larger deposit reduces how much you need to borrow, which typically lowers monthly repayments and the total interest paid over the term.
Even small deposit increases can make a noticeable difference, especially over 25 to 35 years.
Longer terms can reduce monthly costs by spreading repayments over more years. The trade-off is usually higher total interest across the full mortgage.
Shorter terms generally cost more each month but reduce total interest and clear the debt sooner.
This calculator models repayment mortgages only. Interest-only mortgages have different risk and repayment structures because the principal is not automatically paid down during the term.
Results are based on a fixed interest rate for the full mortgage term with equal monthly repayments. In practice, most UK mortgages use a fixed rate for an initial period (typically 2 or 5 years), after which the rate reverts to the lender's standard variable rate.
The calculator does not include arrangement fees, valuation costs, solicitor fees, stamp duty, or mortgage insurance. These can add several thousand pounds to the overall cost of buying a property. Use the stamp duty calculator alongside this tool to estimate that part of the cost.
It depends on lender criteria and the product. Many buyers target at least 5% to 10%, while a larger deposit can improve rates and reduce monthly repayments.
LTV is the mortgage amount divided by property price. Lower LTV means a bigger deposit and often better mortgage pricing.
Usually yes. Extending the term spreads payments over more months, which lowers monthly cost. However, total interest is typically higher.
Total interest depends mainly on mortgage size, interest rate, and term length. This calculator estimates the full-term interest based on those inputs.
It uses standard repayment mortgage maths and gives a strong estimate. Real outcomes may differ if rates change, fees apply, or product terms differ from your assumptions.
Buying a home affects more than your mortgage payment. Use our other calculators to build the complete picture.