A Buy to Let (BTL) mortgage is designed for people who want to purchase a property with the intention of renting it out. When you take out a Buy to Let mortgage, you become the landlord, and the people living in the property become your tenants. You can manage the property yourself or use a letting agent to handle the day‑to‑day running for a fee.
How Much Deposit Do You Need for a Buy to Let Mortgage?
Most Buy to Let mortgages require a minimum 25% deposit, which is higher than a standard residential mortgage. There are lenders who accept smaller deposits, but these usually come with higher interest rates, higher fees, and stricter criteria.
Repayment Options: Capital Repayment vs Interest‑Only
1. Capital Repayment: You repay both the capital and the interest each month. At the end of the term, you own the property outright. Monthly payments are higher, so rental profit is lower during the mortgage term.
2. Interest‑Only: You only pay the interest each month. Monthly payments are lower, so rental profit is higher during the mortgage term. At the end of the mortgage term, you must repay the full mortgage balance in one lump sum, usually by selling the property.
How Lenders Assess a Buy to Let Mortgage
Lenders assess expected rental income, property type, location, personal income, credit profile, and use a rental stress‑test calculation which differ depending on the product chosen and if you are a basic or higher rate tax payer.
Costs and Other Considerations
These include higher stamp duty, letting agent fees, landlord insurance, optional add‑ons (accidental damage, legal expenses, home emergency cover, rent guarantee), annual safety checks, maintenance, and taxation.
Tax Considerations
Rental income must be declared to HMRC. Higher‑rate taxpayers should seek advice from an expert. Properties can be owned personally or via a limited company, each with different tax implications. You should seek advice from an accountant or tax expert to find out which ownership method is right for you.
What Should You Do Next?
Research is essential. Speak to local letting agents to understand demand and rental expectations. You should also speak to an accountant or tax expert before purchasing a buy to let.
Checklist Of Who You Should Speak To?
1. A mortgage adviser such as ourselves to ensure you meet criteria
2. A tax specialist or accountant to understand the best ownership method and what income tax you will need to pay
3. A letting agent to understand the demand and management fees
Ready to Explore Becoming a Landlord?
If you’re considering a Buy to Let mortgage, we’d be happy to help you understand your options and guide you through the process. To book a consultation with an adviser, you can send us a message or call 01455 63 61 63.
Most Buy to Let mortgages are not regulated by the Financial Conduct Authority. Your home may be repossessed if you do not keep up repayments on your mortgage.
Blog written on 24/02/2026
The information contained within this blog was correct at the time of publication (24/02/2026), and is subject to change.
