Second Charge Mortgage Guide (Buy-to-Let) 2026
Your complete mortgage journey — every stage, every party, every document. Select your journey below and click any stage to learn more.
Written and reviewed by Sophie Harrison · Page last reviewed 8 April 2026
What are you doing?
What type?
Second charge mortgage › The property is rented out
Click any stage to learn more
Sourcing & research
Review the market: rates, criteria, affordability.
You research lenders and products — rates, fees, LTV tiers, and criteria eligibility. Second charge mortgages sit behind your existing first charge mortgage. Fewer lenders offer these — specialist sourcing is essential. As the property is rented, the lender will assess rental coverage alongside your personal income. An affordability sense-check at this stage sets realistic expectations before any formal approach. Mortgage Compare models this for you across 40+ lenders instantly.
Not sure which? Read our broker vs going direct guide
Fact find & advice
Broker gathers your full financial picture and recommends a suitable product.
First lender consent
Your existing first-charge lender must consent to a second charge being placed.
Decision in principle (DIP)
High-level credit and affordability check with the lender.
Purpose of funds
Lender assesses the stated purpose of the second charge borrowing.
Full mortgage application (FMA)
Complete application with full property and income detail, documents uploaded.
Underwriting assessment
Offer or declineLender assesses the application. Valuation and conveyancing proceed alongside.
Application review
Underwriters verify income, credit, documents, and policy compliance.
Valuation & survey
Surveyor visits your property and reports to the lender.
Mortgage offer
Formal offer issued. References the ESIS. Can only be rescinded in limited circumstances.
Completion
Funds released. Second charge registered behind your existing mortgage.
First second-charge payment
First payment on your second charge mortgage. Your existing first mortgage payments continue separately.