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Which? Mortgage Advisers are unfortunately unable to accept any new customers. We apologise for any inconvenience.
Existing customers can still contact us on 01174 566027

Read the Mortgage and Property advice from Which? to help you find the best solution for your needs or use Money Compare to find the best mortgage for you.

Buy-to-let mortgage calculator

Enter the expected rental income and (if you have it) the property value into the buy to let mortgage calculator below to get a rough idea of how much you could borrow.

To find out how much you can borrow, fill in your estimated rental income and property value below.

* required field

To find out what mortgages are available to you and exactly what your monthly payments would be speak to one of our advisers by calling the number below.

0292 267 0274

Lines are open:

  • Monday - Friday
  • Saturday - Sunday
  • Public Holidays
  • 9am - 5pm
  • Closed
  • Closed

Remember, this is only an estimate. Banks and building societies will take into account a number of different factors when calculating how much they will lend you so the actual amount you can borrow may vary considerably. Typically, they are unlikely to lend more than 75% of the overall property value and will want to see evidence that your expected rental income will cover your mortgage interest payments by at least 125%. However, you may be able to borrow more if you have other properties or collateral.

This information does not contain all of the details you need to choose a mortgage. Make sure that you read the separate key facts illustration before you make a decision and proceed with a mortgage.


Bear in mind that online calculators give a one size fits all estimate, but our impartial advisers can give you a much more accurate figure to work with.

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