A Comprehensive Guide to Buy-to-Let Mortgages and Short-Term Letting in the UK
With the rise of Airbnb and similar platforms, many property owners are now exploring ways to turn residential properties into profitable short-term lets. However, navigating the mortgage landscape can be complex when it comes to letting out your home or investment property. A frequent question from aspiring hosts is: What mortgage do you need for an Airbnb? In most cases, the answer lies in a buy-to-let mortgage, but there’s more to consider.
In this guide, we’ll unpack everything you need to know about financing an Airbnb property in the UK, including mortgage types, lender expectations, and how to stay compliant with legal and financial regulations.
A buy-to-let (BTL) mortgage is designed for people who want to purchase a property specifically to rent it out, typically on a long-term basis. These mortgages differ from standard residential mortgages in a few key ways:
Higher deposit requirements: Usually between 20% and 40%.
Interest rates: Often slightly higher than residential mortgage rates.
Affordability: Based on the property’s expected rental income rather than the borrower’s salary.
Interest-only options: Many BTL mortgages are interest-only, meaning you only pay interest each month and repay the loan at the end of the term.
However, not all BTL mortgages allow short-term letting, which is where things get complicated for Airbnb hosts.
Letting a property on Airbnb typically falls under short-term or holiday let activity. This can pose an issue if you have a traditional buy-to-let mortgage that restricts letting to Assured Shorthold Tenancies (ASTs) of six months or more.
Most standard buy-to-let lenders do not allow Airbnb-style letting without express permission. Short-term lets are considered riskier due to variable income, higher turnover of tenants, and potential for increased property wear and tear.
Some lenders now offer specialist holiday let mortgages, which are similar in structure to buy-to-let mortgages but designed to accommodate short-term or serviced accommodation.
A holiday let mortgage is a more flexible alternative if you plan to rent out your property via platforms like Airbnb or Booking.com. These mortgages are tailored for properties that will be let for short periods to tourists or business travellers.
Available for properties used specifically for short-term letting.
Income assessed based on projected holiday let income (not AST rent).
Some lenders accept part-time personal use of the property.
Often require proof of seasonal income forecasts and occupancy rates.
Holiday let mortgages tend to come with slightly stricter criteria and are not available from every lender, but they are the most compliant way to run an Airbnb business.
If you already have a BTL mortgage and want to switch to Airbnb, you must check your mortgage terms and get permission from your lender. Without this, you risk breaching your contract, which could lead to severe consequences, including mortgage recall or foreclosure.
Seek consent to let short-term: Some lenders may allow it on a temporary or conditional basis.
Remortgage to a holiday let product: Switch to a lender who supports Airbnb activity.
Switch to a commercial mortgage: If your Airbnb operation grows, a commercial mortgage may suit high-volume short lets.
Always inform your mortgage provider before changing the property’s use. Failure to do so could invalidate your mortgage and home insurance.
Airbnb hosts in the UK must also stay compliant with various planning, licensing, and tax regulations, depending on the location of the property.
London 90-day rule: In Greater London, short-term letting is limited to 90 nights per year unless you get change-of-use planning permission.
Council tax vs. business rates: If your property is available to let for over 140 days per year, it may be subject to business rates instead of council tax.
Furnished Holiday Let (FHL) tax status: If your Airbnb qualifies as an FHL, you may receive tax advantages such as:
Capital allowances
Mortgage interest relief
Business rates exemptions
Ensure your property meets FHL criteria: available for let at least 210 days/year and actually let for at least 105 days/year.
Whether you choose a buy-to-let or holiday let mortgage, lenders will assess several factors:
Property location and type – Urban flats may be less accepted than rural cottages in holiday hotspots.
Expected rental income – Lenders may use conservative estimates for short-term lets.
Your experience – Some lenders prefer borrowers with property letting or hospitality experience.
Credit history and personal finances – Despite rental income being the primary factor, your financial standing still matters.
Some top UK lenders in the holiday let space include Leeds Building Society, Tipton & Coseley, and Furness Building Society.
Higher rental income potential – Short-term lets can yield significantly more than long-term tenancies, particularly in tourist-heavy areas.
Flexibility in property usage – You can use the property for personal stays during vacant periods.
Furnished Holiday Let (FHL) tax advantages – Potential for capital allowances and mortgage interest relief if criteria are met.
Diversified income streams – Airbnb allows for flexible pricing strategies and seasonal boosts.
Not always permitted on standard buy-to-let mortgages – Most lenders restrict Airbnb-type activity.
Increased management responsibilities – Higher turnover means frequent cleaning, guest communication, and property maintenance.
Regulatory limitations – For example, London’s 90-day rule limits how often a property can be let on a short-term basis.
Potentially higher upfront costs – Holiday let mortgages may require a larger deposit and command higher interest rates.
The answer depends on your intended use. If you're letting long-term, a buy-to-let mortgage is appropriate. But for short-term lets via Airbnb, you’ll likely need a holiday let mortgage or specialist product that explicitly allows this type of activity.
Before launching your Airbnb venture, speak to an experienced mortgage broker who understands the nuances of short-term letting finance. Transparency with lenders and adherence to local regulations are critical for a smooth, profitable experience.
Standard buy-to-let mortgages rarely allow Airbnb letting.
Holiday let mortgages are the most suitable for short-term rentals.
Always check your mortgage terms and get lender consent before switching use.
Local laws (like London’s 90-day cap) and tax rules (FHL status) can significantly impact your income.
Seek professional mortgage advice to avoid missteps and ensure long-term profitability.