Remortgaging a buy-to-let property: what to check
Remortgaging can release equity or secure a better rate, but lenders apply rental cover tests that differ from residential affordability checks.
5 min read · Updated 27 August 2026
Overview
Remortgaging can release equity or secure a better rate, but lenders apply rental cover tests that differ from residential affordability checks.
Rental cover ratio
Lenders typically want rental income to cover 125% to 145% of the mortgage payment at a stressed interest rate.
Early repayment charges
Check your current deal for exit fees before switching, since these can outweigh the savings from a lower rate.
Portfolio landlord rules
Landlords with four or more mortgaged properties face additional underwriting on the whole portfolio, not just the property being remortgaged.
Product fees vs rate
A lower rate with a higher fee is not always cheaper overall; compare the total cost over the deal period.
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This guide is general information for UK landlords and letting agents, not legal advice. Rules differ across England, Wales, Scotland and Northern Ireland, so check your local requirements or take advice before acting.