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 2 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 — check your local requirements or take advice before acting.