⌂Should I Buy to Let?UK property calculatorsAll calculators

Mortgage calculator

Understand the mortgage before you buy.

Calculate monthly payments and total interest, then compare the proposed loan with an illustrative lender rental-cover test.

Interest-only or repayment

Property and borrowing

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£
%
yrs
£

Illustrative lender stress test

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%

Your mortgage estimate

Payments use a constant rate for the term. Actual products and lender tests vary.

Estimated monthly payment£0Interest-only payment at the entered rate.
Mortgage amount£0
Loan to value0%
Total interest over term£0
Balance at end of term£0
Rent required under stress test£0 / month
Maximum loan supported by entered rent£0
Rental-cover headroom£0 / month
The entered rent covers the illustrative stress test.
Next: test cash flow, tax and total investment return →

How the rental stress test works

Many buy-to-let lenders assess whether rent covers stressed mortgage interest by a required percentage. This calculator uses the stress rate and interest-cover ratio you enter: required monthly rent equals the loan multiplied by the stress rate, then by the cover ratio, divided by 12.

This is only an illustration. Lenders use different rates, cover ratios, maximum LTVs and borrower criteria; some also assess personal income. Product fees, introductory periods and refinancing are not included in the payment calculation.

This educational calculator is not a mortgage offer or financial advice. Confirm affordability, product costs and underwriting criteria with an authorised mortgage adviser or lender before acting.