Can First-Time Buyers Use Bonus Income for a Mortgage?

Many first-time buyers receive part of their pay through bonuses, performance incentives, or commission. When applying for a mortgage, a common question is whether this additional income can be included in affordability calculations. Understanding how lenders assess bonus income for mortgage applications can help buyers prepare their finances and documentation before applying.

Mortgage affordability assessments usually focus on stable, predictable income. However, many lenders recognise that modern pay structures often include variable elements such as annual bonuses, sales commission, or productivity incentives. As a result, bonus income for mortgage affordability may sometimes be considered, depending on how consistent the payments are and how the lender evaluates risk.

Criteria can vary significantly between lenders. Some may include a percentage of bonus income, while others may require a history of receiving similar payments over multiple years. The way bonus income is structured, documented, and evidenced can influence whether it is counted in the borrowing calculation.

This guide explains how lenders typically assess bonus income for mortgage applications, what first-time buyers should expect during affordability checks, and how variable earnings may influence borrowing limits.

Can bonus income for mortgage affordability be included?

In many cases, lenders may include bonus income for mortgage affordability, but usually only if it is consistent, well documented, and supported by a reliable payment history.

Mortgage lenders generally prioritise stable income sources such as salary when calculating affordability. Bonuses are considered variable income, meaning they may fluctuate or stop entirely. Because of this uncertainty, lenders often apply more cautious rules when assessing them. Instead of counting the full amount, they may include only a portion of the bonus or calculate an average based on past payments.

Most lenders look for a track record showing that bonus payments are regular and predictable. This often involves reviewing payslips, employment contracts, and P60 forms to confirm that bonuses have been paid consistently over time. A one-off or irregular payment is less likely to be included in the affordability calculation.

Employment stability also plays a role. Applicants who have worked for the same employer for several years and regularly receive bonuses tied to performance may find lenders more willing to consider the income. By contrast, newly received bonuses or recent job changes may make lenders more cautious when assessing affordability.

How mortgage lenders assess bonus income

Lenders typically assess bonus income by reviewing historical payments and averaging them over a set period, often one to three years.

When reviewing an application, lenders usually examine payslips and tax documents to understand how frequently bonuses are paid. If bonuses appear regularly each year, lenders may treat them as part of the applicant’s overall income profile. In many cases, they will calculate an average of the bonus amounts received across previous years to estimate a sustainable level.

Some lenders include only a percentage of the averaged bonus income. For example, they may consider 50% to 75% of the calculated average when determining borrowing capacity. This approach helps account for potential fluctuations while still recognising that the income may form a meaningful part of the applicant’s earnings.

The structure of the bonus also matters. Guaranteed bonuses written into employment contracts are sometimes treated differently from discretionary performance bonuses. Lenders generally view guaranteed payments as more reliable, while discretionary bonuses may be assessed more cautiously.

Minimum history lenders may require

Most lenders require evidence that bonus income has been received consistently for at least one or two years before including it in a mortgage affordability assessment.

This requirement helps lenders determine whether the bonus is a recurring part of income rather than a temporary or unusual payment. Applicants are often asked to provide payslips covering several months as well as annual tax summaries such as P60 forms. These documents allow lenders to confirm that bonuses were paid regularly and in similar amounts.

Some lenders may ask for employer confirmation of the bonus structure. For example, an employer might confirm that bonuses are typically paid annually based on performance or company results. This additional information can help lenders evaluate the likelihood of future payments.

If an applicant has only recently started receiving bonuses, lenders may exclude them from affordability calculations entirely. In these cases, the mortgage offer may be based solely on base salary or other stable income sources.

How bonus income can affect mortgage borrowing

If accepted by the lender, bonus income may increase the amount a first-time buyer can borrow by improving the overall affordability calculation.

Mortgage affordability is usually calculated by applying an income multiple to the borrower’s earnings while also considering monthly expenses and existing debts. When bonus income is included, even partially, it can raise the total income figure used in the lender’s calculation. This may allow applicants to access a slightly larger borrowing range.

However, lenders also run detailed affordability stress tests. These assessments consider whether borrowers could still manage payments if interest rates rise or household expenses increase. Variable income such as bonuses may be treated cautiously during these checks, meaning the impact on borrowing limits may be limited.

Because bonuses are not guaranteed, lenders may also evaluate how dependent an applicant’s finances are on this income. Applicants whose essential spending relies heavily on bonuses may face stricter affordability assessments compared with those who treat bonuses as additional earnings.

Example scenario: a first-time buyer using bonus income

A practical example can help illustrate how bonus income for mortgage affordability may be assessed during a lender’s application review.

Imagine a first-time buyer earning a base salary of £40,000 per year who also receives an annual performance bonus. Over the past three years, their bonuses were £6,000, £5,500, and £6,500. When reviewing the application, a lender may calculate the average bonus across those years, which in this case would be £6,000.

Instead of counting the full amount, the lender might include a percentage of the average bonus when calculating affordability. If 50% of the averaged bonus is accepted, this would add £3,000 to the borrower’s usable income figure. The lender would then combine this with the base salary when applying affordability calculations.

The lender would also examine supporting documents such as payslips, employment confirmation, and bank statements. They may check whether the bonuses appear regularly and whether the borrower’s monthly expenses remain manageable even if future bonuses are lower than expected.

Things first-time buyers should consider

First-time buyers relying partly on bonus income should understand that lenders may treat variable earnings cautiously during mortgage affordability assessments.

Preparing documentation early can make the process smoother. Lenders may request multiple payslips, P60 forms, and sometimes employment confirmation to verify bonus payments. Having a clear record showing consistent bonuses over several years may strengthen the application and help lenders assess income more confidently.

It can also be helpful to consider affordability without relying entirely on bonus income. Since bonuses are not guaranteed, borrowers may wish to ensure their mortgage payments remain manageable based on base salary alone or with reduced bonus amounts.

Mortgage criteria differ across lenders, and the way bonus income is assessed can vary widely. Some lenders may be more flexible with variable income than others, which is why applicants often review multiple lending criteria before applying.

Frequently Asked Questions

Do all lenders accept bonus income for a mortgage?

No. Some lenders accept bonus income as part of affordability calculations, while others may exclude it entirely. Policies vary depending on how predictable the income appears and how much documentation is available.

How many years of bonus history do lenders usually require?

Many lenders look for at least one to two years of consistent bonus payments. Some may prefer a longer history so they can calculate a more reliable average income figure.

Is 100% of bonus income counted in mortgage affordability?

Not usually. Many lenders include only a percentage of averaged bonus income, often between 50% and 75%, to account for the possibility that bonuses may vary from year to year.

Can commission income be treated the same as bonus income?

Commission and bonus income are both considered variable earnings. Lenders may assess them in a similar way, typically by reviewing payment history and averaging the income across previous years.

Can first-time buyers get a mortgage with mostly variable income?

It may be possible, but lenders generally require strong evidence of consistent earnings and employment stability. The way variable income is assessed can differ depending on lender criteria.

This guide provides general information only. Personalised mortgage advice should always come from a regulated mortgage adviser authorised by the Financial Conduct Authority.