Mortgage Calculator
Calculate your monthly mortgage payment, total interest, and view a detailed amortisation schedule. Enter a deposit, or find the maximum you can borrow on your budget.
Mortgage Details
Enter your mortgage information.
Your Mortgage Breakdown
Monthly Payment
GBP 1,501.87
A GBP 300,000.00 mortgage at 3.5% over 25 years costs GBP 1,501.87 per month.
Total Payment
GBP 450,561.21
Total Interest
GBP 150,561.21
Balance Over Time
Amortisation Schedule (First 12 Months)
| Month | Payment | Principal | Interest | Balance |
|---|---|---|---|---|
| 1 | GBP 1,501.87 | GBP 626.87 | GBP 875.00 | GBP 299,373.13 |
| 2 | GBP 1,501.87 | GBP 628.70 | GBP 873.17 | GBP 298,744.43 |
| 3 | GBP 1,501.87 | GBP 630.53 | GBP 871.34 | GBP 298,113.90 |
| 4 | GBP 1,501.87 | GBP 632.37 | GBP 869.50 | GBP 297,481.53 |
| 5 | GBP 1,501.87 | GBP 634.22 | GBP 867.65 | GBP 296,847.31 |
| 6 | GBP 1,501.87 | GBP 636.07 | GBP 865.80 | GBP 296,211.24 |
| 7 | GBP 1,501.87 | GBP 637.92 | GBP 863.95 | GBP 295,573.32 |
| 8 | GBP 1,501.87 | GBP 639.78 | GBP 862.09 | GBP 294,933.54 |
| 9 | GBP 1,501.87 | GBP 641.65 | GBP 860.22 | GBP 294,291.89 |
| 10 | GBP 1,501.87 | GBP 643.52 | GBP 858.35 | GBP 293,648.37 |
| 11 | GBP 1,501.87 | GBP 645.40 | GBP 856.47 | GBP 293,002.98 |
| 12 | GBP 1,501.87 | GBP 647.28 | GBP 854.59 | GBP 292,355.70 |
About This Mortgage Calculator
Our mortgage calculator helps you understand the true cost of a home loan before you commit. Enter your loan amount, interest rate, and term to instantly see your monthly repayment, total interest over the full mortgage term, and the balance-over-time chart showing how your debt shrinks year by year.
The With Deposit mode is especially useful when comparing properties: enter the asking price and your deposit amount, and the calculator automatically computes the loan amount, deposit percentage, and monthly payment. The Affordability mode works backwards from your budget to show the maximum property price you can finance at current rates.
How to Use This Calculator
- 1
Choose your calculation mode
Standard calculates the monthly payment on a known mortgage amount. With Deposit lets you enter the property price and deposit to automatically calculate the loan amount. Affordability works backwards from your monthly budget to find the maximum property price you can afford.
- 2
Enter your mortgage details
Provide the loan amount (or property price and deposit), your expected annual interest rate, and the mortgage term in years. A standard UK residential mortgage runs 25 years, but terms from 10 to 40 years are available.
- 3
Review the cost breakdown
The results show your monthly payment, total amount repaid, and total interest over the full term. The balance-over-time chart shows how the outstanding mortgage shrinks year by year.
- 4
Read the amortisation schedule
The first 12 months breakdown shows exactly how each payment is split. In the early years, a large proportion goes to interest. This shifts over time as the balance reduces and more of each payment goes toward repaying the principal.