How Is Rental Income Used in Mortgage Applications?

On the face of it, receiving rent and using that income to support your mortgage seems fairly black and white. If the rent lands in your account each month, then it’s probably easy to assume that a mortgage lender will simply count that as additional income and move on with your application.

In practice, however, using rental income for a mortgage application is not always quite that simple.

When it comes to including property income in a mortgage application, the rent itself is only part of the picture. The lender’s affordability criteria, consistency of rental income, and the evidence to support it all play a crucial role in how much of that income is taken into account.

So, can rental income be used for a mortgage, and if so, how do lenders assess it?

In this article, we jump into all the specifics on how rental income is used in mortgage applications, what documentation is required as evidence, and the differences between residential and buy-to-let mortgage applications. Let’s begin.

What Types of Rental Income Are Considered for a Mortgage?

It is very common for rental income to be included within a residential mortgage application. However, before any rental income can be taken into account, lenders will usually want to see that the income has been received consistently over time and can be evidenced through supporting tax documentation.

Unlike employed applicants, where lenders can verify income through payslips and a P60, rental income is usually evidenced through a Self Assessment.

What does this mean in practice?

This means that lenders will request SA302 Tax Calculations and Tax Year Overviews in order to verify how much rental income has been declared. At this point, your chosen lender will apply their own criteria to assess how much rental income can be included within the overall affordability assessment.

In most cases, lenders will want to see a minimum of at least two years of tax records to demonstrate that the rental income has been received consistently and declared to HMRC.

As a general rule, most lenders will favour a longer track record before accepting rental income as part of a residential mortgage application. As such, for landlords who only have a short rental history, for example owning a buy-to-let property for less than a year, could find their mortgage options more limited.

What Documents Are Required to Prove Rental Income?

The exact documents required will depend on both the type of rental income used and the lender’s unique requirements. As a general rule, lenders will want to see clear evidence of how much income the property generates, whether that income has remained stable over time, and the property’s rental history.

This is why understanding what documents are needed to prove rental income can be an important part of preparing for a mortgage application. To help build this picture, lenders will often request a combination of documents that can be used as proof of rental income, including:

• Tenancy agreements
• Recent bank statements showing rental payments
• Tax calculations
• Tax year overviews
• Rental accounts or property income statements
• Evidence of property ownership

Ultimately, the more clearly you can demonstrate the amount of rental income being received and its stability over time, the easier it is for lenders to assess how that income can be used to support your mortgage.

How Much Rental Income Is Taken into Account by Lenders?

While the rental income itself may be evidenced through SA302 Tax Calculations and Tax Year Overviews, there is no fixed percentage or amount of rental income that every lender accepts. In practice, lenders are free to apply their own lending policies when deciding how much of that income can be used to support your application.

For example, some lenders may include 100% of the rental income declared, while others may only take a proportion of it into account as part of their affordability assessment.

The percentage of rental income accepted can vary for several reasons, including:

• The lender’s individual affordability criteria
• Your overall income and financial circumstances
• The consistency of your rental income
• The level of rental profit shown within your tax records
• Existing mortgage commitments and financial liabilities

Because every lender applies its own affordability criteria, it is entirely possible for two lenders to receive exactly the same mortgage application but arrive at different borrowing amounts.

This is one of the many reasons why comparing lenders can be a crucial factor in deciding your overall borrowing power and securing a mortgage that works best for your specific circumstances.

For those whose rental income forms a significant proportion of their overall earnings, working with a trusted mortgage broker can help to identify lenders who are most likely to accept all of your rental income to help maximise your borrowing potential.

What Tax and Expense Considerations Apply to Rental Income?

Tax and expenses can have a direct impact on the amount of rental income available to support your mortgage application. This is because the amount of rent collected each month will not always accurately reflect the total rental profit.

While a property may generate a healthy level of rent each month, expenses such as letting agent fees, maintenance and repairs, insurance, and other allowable property costs can all reduce the total rental profit.

Understanding how expenses and tax rules affect the rental profit is the reason why the amount lenders use within their affordability assessment can differ from the property’s monthly rental income.

To help demonstrate, we have created a table below that outlines some of the most common tax and expense considerations that could affect how rental income is assessed within a mortgage application.

One of the most important points for landlords to understand is that a property generating a high level of rental income will not always generate a high level of rental profit.

In practice, the costs associated with owning, maintaining, and managing a property can significantly reduce the income available once expenses have been taken into account.

Ultimately, lenders will typically base their assessment on the total rental profit that is evidenced through your tax documentation.

How Do Buy-to-Let and Residential Mortgage Applications Differ?

Buy-to-Let Mortgage Application

Affordability is primarily driven by the property’s rental income, although some lenders may also take the applicant’s personal income into account.

In addition, the type of rental property in a buy-to-let mortgage can significantly influence which mortgage products are available. For example, lenders often have different criteria for standard residential lets, HMOs, holiday lets, and other specialist properties.

Residential Mortgage Application

Affordability is primarily based on the applicant’s personal income, such as salary, self-employed income, rental income, overtime and commission in order to determine whether that individual can afford the mortgage repayments.

It is important to note that when rental income is included within a residential mortgage application, lenders will usually place a greater emphasis on the income declared through your tax calculations, rather than on the type of rental property generating it.

In simple terms, rental income rules for buy-to-let mortgages are typically influenced by both the property’s rental income and the type of property being financed. Whereas, residential mortgage applications are primarily driven by the applicant’s personal income and the rental income evidenced through their tax records.

How Can a Mortgage Adviser Help You?

Securing a rental income mortgage often involves more than simply evidencing the rent being received each month. With different lender criteria, affordability assessments, rental stress testing, and supporting documentation all influencing the outcome of an application, it can be easy to get lost in the details.

This is where working with a trusted mortgage adviser can help simplify the process.

At Boon Brokers, we provide fee-free mortgage advice and access to a wide range of UK lenders. Our advisers regularly help landlords and property owners understand lender requirements, organise supporting evidence, and identify mortgage options that reflect their rental income circumstances.

Boon Brokers can help you:

• Understand how different lenders assess rental income
• Identify whether a property is likely to meet a lender’s rental stress test
• Prepare the documentation needed to evidence rental income
• Compare mortgage options based on your property type and income profile
• Avoid common delays caused by missing information or incomplete evidence

Whether you own a single residential buy-to-let property or a larger property portfolio, contact Boon Brokers today to discuss your rental income and speak with an adviser about your mortgage options and find a lender whose criteria matches your needs.

Want to learn more about how different types of income are assessed for a mortgage?

Read our complete guide to What Proof of Income Is Needed for a Mortgage and explore how lenders assess employed income, self-employed earnings, bonuses, commission, overtime, rental income, and more.