Cash Calculator

Mortgage Calculator

Calculate mortgage repayments with deposit, term and repayment type options. Review the full breakdown and watch the balance change on the graph.

Mortgage inputs Deposit, term, repayment type and overpayment support Use the graph and full monthly breakdown to understand the cost of the mortgage over time.

Mortgage inputs

Enter the property price, deposit, interest rate, mortgage term and repayment type. You can also add a product fee and monthly overpayments.

Mortgage summary

These results update instantly so you can see how deposit size, mortgage term and repayment type change the monthly payment and total cost.

Monthly payment£0.00Includes any monthly overpayment entered above.
Mortgage amount£0.00Property price minus deposit.
Loan-to-value0.00%Lower LTV usually means better product pricing.
Total repayable£0.00Payments across the term plus any product fee and final lump sum if applicable.
Total interest£0.00Lifetime interest paid under the current settings.
Final lump sum£0.00Shown when interest-only leaves capital unpaid at the end of the term.
Property price£0.00
Deposit amount£0.00
Deposit percentage0.00%
Mortgage amount£0.00
Repayment typeCapital repayment
Term selected0 years
Actual payoff term0 months
First month interest£0.00
First month principal£0.00
Balance after 5 years£0.00
Product fee£0.00
Monthly overpayment£0.00

Balance graph

The graph shows the mortgage balance over time. Switch between repayment types or add overpayments to see how quickly the balance changes.

The chart updates automatically as you change the mortgage settings.

Repayment breakdown

Inspect the amortisation schedule month by month, or switch to annual checkpoints if you want a shorter summary view.

PeriodPaymentInterestPrincipalBalance
Month 1£0.00£0.00£0.00£0.00
How to Use a Mortgage Calculator – Step-by-Step Guide

How to Use a Mortgage Calculator: A Complete Beginner’s Guide

A mortgage calculator is a powerful tool that helps you estimate your monthly home loan payments, total interest, and affordability. Whether you’re buying your first home or refinancing, understanding how to use a mortgage calculator can save you time and money.

What Is a Mortgage Calculator?

A mortgage calculator is an online tool that helps you estimate your monthly mortgage payments based on factors like loan amount, interest rate, loan term, and down payment.

Key Inputs You Need

  • Loan Amount: The total amount you plan to borrow.
  • Interest Rate: The annual interest rate offered by the lender.
  • Loan Term: The length of your mortgage (e.g., 15, 20, or 30 years).
  • Down Payment: The upfront amount you pay toward the home.
  • Property Taxes & Insurance: Optional but useful for accurate estimates.

Step-by-Step Guide to Using a Mortgage Calculator

1. Enter the Home Price

Start by inputting the total price of the property you’re interested in.

2. Add Your Down Payment

Enter the amount you plan to pay upfront. A higher down payment reduces your loan amount and monthly payments.

3. Input the Interest Rate

Use an estimated or quoted rate from lenders. Even small changes in interest rates can significantly impact your payments.

4. Choose the Loan Term

Select how long you’ll repay the loan. Shorter terms mean higher monthly payments but less interest overall.

5. Include Additional Costs

Add property taxes, insurance, and possibly HOA fees for a more realistic monthly estimate.

6. Review Your Results

The calculator will show your estimated monthly payment, total interest paid, and overall loan cost.

Example Calculation

If you borrow £250,000 at a 5% interest rate over 25 years, your estimated monthly payment will be calculated instantly, helping you assess affordability before committing.

Why Use a Mortgage Calculator?

  • Quickly estimate monthly payments
  • Compare different loan scenarios
  • Plan your budget effectively
  • Understand long-term interest costs

Tips for Better Results

  • Try different interest rates to see how they affect payments
  • Adjust loan terms to find the best balance
  • Include all costs for accurate budgeting
  • Use it regularly while house hunting

Common Mistakes to Avoid

  • Ignoring taxes and insurance
  • Using unrealistic interest rates
  • Not factoring in maintenance costs

Final Thoughts

Using a mortgage calculator is one of the easiest ways to understand your potential home loan. By experimenting with different inputs, you can make informed financial decisions and confidently plan your home purchase.