Calculators Hub
Explore tools to plan and compare
A growing collection of quick, no-login calculators to help you weigh up mortgage overpayments, investing, budgeting, and long-term planning. All run in your browser.
Mortgage
Mortgage Payment Calculator
Estimate your monthly mortgage payment and the total cost of borrowing.
Example presets
Use a preset to see a first-time buyer, higher-deposit, or interest-only example.
Estimate a mortgage payment
Enter a home price, deposit, rate, and term to get a simple monthly mortgage estimate.
Your estimated mortgage costs
Monthly mortgage payment
£1,454
A simple estimate based on your inputs.
Total amount repaid
£436,140
Over the full term, including any fee rolled into the loan.
Total interest paid
£181,140
How much of the overall cost is interest.
Loan-to-value (LTV)
85.0%
This compares the mortgage amount against the property price.
A lower LTV often means you are borrowing a smaller share of the home value.
Mortgage amount borrowed
£255,000
This is the mortgage balance before any separately paid fee.
What this means
This estimate spreads the mortgage across the full term, so each payment covers interest and repays part of the loan.
For education only — not financial advice.
Example scenario
Example scenario
This example uses numbers that are common for a first-time buyer looking at an average-priced home.
- Property price: £300,000
- Deposit: £45,000
- Mortgage rate: 4.75%
- Term: 25 years on a repayment basis
It gives you a quick feel for the monthly payment, the long-term interest cost, and how much you would actually be borrowing.
Learn the basics
How the Mortgage Payment Calculator Works
Mortgage repayments, interest-only loans, and loan-to-value
A repayment mortgage spreads the loan across the full term, so each monthly payment covers interest and also reduces the balance. Early on, a bigger share usually goes to interest, and later on more of the payment goes to the balance.
An interest-only mortgage works differently. The monthly payment only covers interest, so the original mortgage balance is still there at the end unless you have another plan to repay it.
Loan-to-value, or LTV, is another key part of the picture. It shows how much you are borrowing compared with the property price, and lenders often use it when deciding which rates to offer.
Pros vs cons
Pros
- Quick way to estimate monthly mortgage costs before speaking to a lender or broker.
- Shows the long-term interest cost as well as the monthly payment.
- Helps compare repayment and interest-only in plain English.
Cons
- Real lender deals can include extra fees, incentives, or affordability rules.
- A quoted rate today may not match the rate you can actually get.
- Interest-only looks cheaper monthly, but it does not clear the balance for you.
Glossary
- Interest-only
- A mortgage where the monthly payment covers interest, but not the original loan balance.
- Loan-to-value (LTV)
- The mortgage amount as a percentage of the property price.
Frequently asked questions
Does this tell me if I will pass affordability checks?+
No. It estimates the mortgage cost, but lenders use their own affordability rules and stress tests.
Why does adding a fee to the mortgage matter?+
Because you are borrowing the fee as well, which usually raises both the monthly payment and the total interest paid.
What is a good loan-to-value level?+
Lower LTV often means lower risk for the lender, which can sometimes unlock better mortgage rates.
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Open calculatorThese calculators are for educational purposes only and do not constitute financial advice.
They use simplified assumptions and browser-based estimates. Read the full disclaimer before making important decisions.