Mortgage repayment calculator

Estimate monthly payments and see what capital would remain due with interest-only or part-and-part borrowing.

Plan a monthly payment

Compare repayment types using your own figures

Enter a loan amount, an illustrative annual interest rate and a term to estimate a monthly payment. You can compare capital and interest, interest-only, or a mix of the two. This is payment arithmetic, not a mortgage offer or an affordability decision.

Mortgage repayment estimate

Use the mortgage amount, not the property price.

This is a rate you choose to test, not a current product quote.

The calculation assumes monthly payments across this term.

Part and part combines a repayment portion with an interest-only portion.

This assumes the rate stays the same throughout the term and uses monthly interest at one-twelfth of the annual rate. It excludes lender fees, insurance, taxes, rate changes and any overpayments. The figures stay in your browser; this tool does not send them to Count Ready.

What each result means

Capital and interest

Each modelled payment covers interest and some of the original loan. If the assumed rate and payment hold for the full term, the modelled loan balance reaches zero.

Interest-only

The modelled monthly payment covers interest alone. The full amount borrowed remains to be repaid at the end of the term, so a credible repayment plan matters.

Part and part

One portion is modelled as capital and interest; the other is interest-only. The interest-only portion remains due at the end of the term.

Use the estimate to ask better questions

Try another rate

Change the rate to see how the modelled payment moves. A live mortgage rate, product period and fees need a current lender illustration.

Check your monthly budget

Take a proposed payment to the monthly budget check. It shows a balance from your figures but does not determine what a lender may offer.

Explain how you earn

If you are self-employed, the self-employed mortgage guide explains how trading history and income evidence can affect an application.

Repayment calculator questions

Is this the payment a lender will charge?

No. It is an estimate using the figures and constant rate you enter. Your lender's illustration will set out its actual rate, payment schedule, fees and product terms.

Does a lower interest-only payment mean a cheaper mortgage?

Not necessarily. The interest-only capital remains due at the end of the term. Compare the full cost and the repayment strategy, rather than the monthly payment alone.

Can this tell me whether I qualify for a mortgage?

No. A lender assesses verified income, spending, credit commitments, deposit, property and its current criteria. If your income varies, seek advice on the evidence a lender may use.

What should I do if the estimated payment looks too high?

Review the amount, rate and term you entered, then check the full household budget. A longer term can lower a modelled monthly payment while increasing interest over time. Ask for advice before choosing a product.

From estimate to advice

Discuss the figures behind your mortgage plan

Count Ready can help you compare a realistic loan amount, term and repayment type against your circumstances and current lender criteria. Tell us if you are buying, moving or remortgaging, and whether any income is self-employed. Advice cannot guarantee acceptance.

Request a mortgage conversation