Understanding how different mortgage lenders treat short-term rental income has become increasingly important for property owners and investors in recent years. With the explosion in popularity of platforms like Airbnb, HomeAway, and Vrbo, an emerging segment of borrowers is generating income not through traditional long-term tenancy, but by letting out all or part of their property on a short-term basis. This trend has complicated the process of obtaining mortgages or refinancing, as not all lenders are aligned when it comes to recognising this form of income during affordability checks.

The necessity to accurately assess borrowing capacity is vital when applying for a mortgage or remortgage deal, and navigating this changing landscape can be challenging. As more people turn to flexible letting options as part of their financial model, understanding which lenders take these revenue streams into account — and how they assess them — is key to making informed housing and investment decisions.

The appeal of short-term letting

The rise of the short-term rental market has transformed the property landscape, particularly in tourist hotspots and city centres. One of the main draws of letting on a short-term basis is the potential for higher rental yields, especially during peak travel seasons. Property owners often find they can earn significantly more through short stays than by letting out properties under traditional Assured Shorthold Tenancy (AST) agreements.

Additionally, short-term lets provide flexibility: owners can choose when to rent out their property and when to use it themselves. This becomes particularly attractive to those with second homes, investors building a diversified rental portfolio, or even homeowners looking to monetise an unused spare room.

However, this type of income is inherently variable. With factors such as seasonality, location, local events, and economic conditions all influencing occupancy rates and nightly rates, it is harder to provide predictable, year-round income figures. That variability, combined with regulatory issues and the non-traditional nature of this income, makes some lenders hesitant to factor it into affordability assessments.

How mortgage lenders assess income

When a borrower applies for a mortgage, lenders are legally obliged to perform affordability checks to confirm that the applicant can meet monthly repayments under current and potential future interest rate conditions. Traditionally, this analysis involves reviewing payslips, tax returns, and any consistent and provable income sources such as pensions or long-term rental earnings via AST agreements.

Income from short-term lets poses a challenge from a lender’s risk management perspective. The unpredictability and often cash-based nature of short-let earnings can raise concerns. Therefore, how each lender evaluates such income varies dramatically. Some lenders may discount it entirely, while others may assess it, but with strict stipulations.

High street lenders versus specialist lenders

Broadly speaking, high street banks tend to be more conservative in their approach to short-term letting income. Their systems and criteria are built around standardised borrower profiles — salaried individuals, long-term rental income, and traditional employment contracts.

Within this segment, some lenders may not allow borrowers to use projected earnings from an Airbnb or similar platform as part of their mortgage application at all. Others may only consider it if there is at least 12 months of documented history showing consistent income, which must be verified through accounts, tax returns, and bank statements.

In contrast, specialist lenders and building societies have emerged as more adaptive and flexible. These institutions often work more closely with brokers and understand the nuances of non-standard earnings. As such, they tend to take a more open-minded approach to reviewing non-traditional income, including from short-term lets.

Key lenders who recognise short-term rental income

It’s important to consult an up-to-date list, as lender policies often change. However, as of the latest available guidance, certain lenders stand out in their approach toward recognising Airbnb and short-let income as part of mortgage affordability checks.

Bank of Ireland

This lender has been relatively progressive, especially when it comes to owner-occupied properties that are partly let out on a short-term basis. They may consider the income generated from platforms like Airbnb, particularly where it is supplementary to a borrower’s main income. Documentation must support this income, such as tax returns and bank statements for at least 12 months.

The lender typically requires evidence of sustainability and might reduce the amount of income accepted to reflect assumed risks or seasonal variations.

Precise Mortgages

A well-known specialist lender, Precise Mortgages has products specifically designed for landlords using short-term rental strategies. They assess affordability based on projected rental income assessments provided by qualified letting agents — either short or long-term projections.

Rather than simply looking at past income only, Precise will often accept forward-looking assessments, which is useful for new entrants to the short-let market or for newly refurbished properties.

Foundation Home Loans

Foundation Home Loans is another lender catering to the specialist buy-to-let market. Their criteria for short-term lets are relatively inclusive. They cater to limited company structures and individual landlords, and will consider Airbnb-style lets, provided the local authority permits such activity and the mortgage is on a buy-to-let basis, not a residential loan.

The key requirement is that the property must be fully managed through a professional agency. Borrowers are usually required to show evidence that the property has been operating successfully, or a letting agent’s projection that demonstrates viable rental yields.

The Mortgage Works (part of Nationwide)

The Mortgage Works, being the specialist buy-to-let arm of Nationwide, accommodates certain types of short-term letting. Though historically more conservative, they have worked to adapt their policies in recent years.

They acknowledge that the sector is changing and now allow holiday let mortgages. Income calculations are based on average weekly rents multiplied by assumed occupancy rates — generally around 30 to 35 weeks per year. This gives a conservative yet acceptable estimate of annual income.

InterBay Commercial

A division of OneSavings Bank, InterBay offers commercial and semi-commercial property lending. They are known for their flexible underwriting and work closely with brokers to structure deals tailored to complex income situations.

For Airbnb-type properties, their underwriting process typically involves both historical earnings and future letting potential. InterBay can often work with shorter trading histories, though detailed appraisals or income projections from professional agents are usually required.

Hodge Bank

Hodge has entered the short-term letting space with some innovative products targeted at both portfolio landlords and retirees looking to generate income into retirement. They are open to holiday let mortgages and consider both past income and projected income if substantiated.

They also understand the seasonal variability of holiday lets, using occupancy assumptions that reflect realistic usage, rather than overly-optimistic full-year income projections.

Bluestone Mortgages

Another flexible lender, Bluestone is known for helping borrowers with non-traditional income, including freelancers and landlords with complex structures. They adopt a broad perspective on affordability and may consider a mixture of income types, including short-term rental income, as long as it is properly documented and sustainable.

Alternatives and workarounds for borrowers

For those whose chosen lender won’t accept short-term let earnings, there are some ways around the issue. One option is to remortgage based solely on one’s salaried income or long-term rental income and only use Airbnb-style income as a supplemental source not disclosed in the affordability check. This could result in a lower loan amount, but it gets the application over the line.

Alternatively, borrowers can consider restructuring their letting arrangement. Some landlords choose to sign a fixed lease agreement with a serviced apartment management company or guaranteed rent provider, who will use the property for short stays — effectively converting short-term income into a fixed, long-term contract more appealing to traditional lenders.

Another consideration is incorporating the property within a limited company structure. Although complex, this can open up access to specialist lenders who are comfortable with corporate property management and rental income flows that don’t align to conventional patterns.

The importance of documentation

Regardless of which lender is used, one constant remains — documentation is vital. Income from short-term lets must be provable. Borrowers should keep detailed records, including:

– 12+ months of bank statements showing payments from Airbnb or other platforms
– Annual self-assessment tax returns (SA302s)
– Detailed booking calendars and rates
– Income and expense breakdowns
– Professional letting agent income projections (where applicable)
– Occupancy rates

Having a professional accountant prepare income statements or summaries based on these documents can also help strengthen an application, especially when working with lenders who rely on manual underwriting.

Regulatory and legal considerations

It’s worth mentioning that local regulations significantly influence a lender’s willingness to work with short-term let properties. For instance, in London, restrictions limit how many nights per year a property can be let on a short-term basis (currently 90 nights per calendar year unless you have specific planning permission). Landlords must be up to date with licensing requirements, insurance, and health and safety obligations.

Some lenders may withdraw mortgage offers or demand immediate repayment if a borrower uses a mortgaged property for short-term lets without obtaining prior permission or violating local planning laws.

Getting expert advice

Given the complexity of affordability checks and the wide range of lenders with differing criteria, it is strongly recommended to consult a mortgage broker – especially one specialising in landlords or buy-to-let lending. Brokers have up-to-date access to the latest lender policies and can match the borrower with a lender best suited to their particular letting strategy.

Furthermore, they can assist in gathering the necessary documentation, structuring an application for success, and navigating underwriting hurdles that self-representing applicants might struggle with.

In conclusion, while generating income through Airbnb or other platforms can be financially rewarding, leveraging this income in mortgage assessments requires careful planning, the right lender, and a robust documentation trail. The list of lenders who will recognise it is growing as the market evolves, but policies vary widely. Preparation, specialist guidance, and a clear understanding of each lender’s criteria remain essential for borrowers seeking to turn their short-term letting success into long-term financial benefits.