A strong bonus can make a major difference to what you can afford, yet many high-street lenders treat it cautiously or ignore it altogether. Bonus income mortgages are designed for applicants whose earnings go beyond a basic salary, including annual performance bonuses, commission, overtime and contractual allowances.
That does not mean every pound of a bonus will automatically count. Lenders want evidence that the income is genuine, regular enough and likely to continue. The right lender can recognise the full strength of your earnings. The wrong one may assess you on basic salary alone and leave you thousands short of the mortgage you need.
What are bonus income mortgages?
A bonus income mortgage is not usually a separate mortgage product with a special rate. It is a mortgage arranged with a lender prepared to include some or all of your variable income when calculating affordability.
This matters for employees in sales, financial services, recruitment, aviation, healthcare, construction, technology and many other sectors where pay is made up of more than a monthly basic wage. A borrower earning £45,000 basic salary plus a reliable £20,000 annual bonus may have a very different borrowing position depending on how a lender assesses that £20,000.
Some lenders will use 100% of a guaranteed or long-established bonus. Others may use an average over two or three years, apply a percentage haircut, or exclude the income entirely. Criteria also change according to your deposit, credit history, job security, other commitments and the type of property you are buying.
Which types of extra income can lenders accept?
Lenders use different definitions, so the label on your payslip matters less than the detail behind it. Annual or quarterly performance bonuses are commonly considered, particularly when they have been paid consistently. Sales commission can also be accepted, although lenders often want a longer history because it can fluctuate more sharply.
Regular overtime may count where it is a normal feature of your role rather than a temporary uplift. Shift allowances, location allowances, retention payments and certain contractual payments may also be usable. For NHS staff, doctors and other healthcare professionals, additional sessions, bank work and on-call income can be relevant, but each income stream needs to be evidenced correctly.
A one-off discretionary payment is harder to use. So is a bonus received only once after changing roles, especially if there is no indication it will be repeated. That is not necessarily the end of the application. It simply means the case needs to be placed with a lender whose policy matches the evidence available.
How lenders assess bonus income
Most lenders start by looking for a track record. Two years of P60s and payslips showing regular bonus payments is often persuasive. Three years can be stronger where earnings vary, while some lenders will consider one year where the bonus is guaranteed in your employment contract or you have only recently moved employer within the same field.
They will also consider whether the income is contractual, discretionary, capped or dependent on company performance. A lender may ask for your latest payslips, P60s, bank statements, employment contract and, in some cases, an employer reference. The underwriter is trying to establish a simple point: can this income reasonably be relied upon for the life of the mortgage?
Your current year matters too. A healthy historic average may not carry much weight if recent payslips show a significant fall. Equally, an improving earnings pattern can sometimes be explained by promotion, a new commission structure or a move into a more senior role. Clear evidence and a credible explanation can change the outcome.
The averaging approach
A common method is to average bonus income over the previous two or three years. If you received £10,000, £16,000 and £20,000, a lender may use the average, the lowest year, or a proportion of the average. There is no single market rule.
This approach protects the lender against peaks that may not recur. It can be frustrating if your income is rising rapidly, but a specialist broker can identify lenders that are more willing to assess the latest figures and the reason behind the increase.
The affordability calculation still applies
Accepted income is only one part of the decision. Lenders also assess credit commitments, dependants, childcare costs, loan payments, credit card balances and household expenditure. They run affordability stress tests to check whether the mortgage remains manageable if interest rates rise.
This is why a large bonus does not always translate directly into a larger loan. Applicants with low unsecured debt and a clean credit profile will usually have more options than someone with missed payments, defaults or a recent county court judgment. However, adverse credit does not automatically rule out borrowing. It means the lender selection and presentation of the case become even more important.
Documents that make a stronger case
A mortgage application based on variable pay should be prepared properly from the start. Last-minute evidence gaps are one of the most avoidable causes of delay.
Have recent payslips available, along with P60s for the last two or three tax years. Bank statements should clearly show salary and bonus payments arriving in your account. Your employment contract is useful where it explains how bonuses are calculated, whether they are guaranteed and what conditions apply.
If your income has changed, provide the reason early. A promotion letter, revised contract or written confirmation of a new commission plan can give the underwriter confidence that a higher current income is sustainable. Do not inflate figures or assume a future bonus will count before it has been paid. Lenders work from evidence, not expectation.
When a bank says no
A decline from your bank does not prove that you cannot get a mortgage. It often means that bank’s automated affordability model does not fit your pay structure.
This is particularly common where bonus income is high relative to basic salary, commission has varied between years, you have started a new role, or you also have credit issues. An automated decision may not account for the context behind a strong application. A lender with manual underwriting may take a more complete view.
There are trade-offs. Specialist lenders can be more flexible, but their rates or fees may be higher in some circumstances. A larger deposit, lower loan amount or a period spent improving your credit file can widen your options. The best route is not always the lender that accepts the most income on paper. It is the mortgage that remains affordable and suitable for your plans.
How to improve your chances before applying
Avoid making several full mortgage applications in quick succession. Multiple hard searches can make a credit profile look pressured, especially after a recent decline. Instead, establish which lenders are likely to accept your income before an application is submitted.
Reduce unsecured borrowing where possible and keep credit card balances under control. Check that your electoral roll details, addresses and employment information are accurate across your credit records. If you are close to receiving a bonus, speak to an adviser before relying on it for a purchase, as the timing of payment and the lender’s policy can be decisive.
It also helps to be realistic about the property budget. Building in a margin can protect you if a lender accepts 50% or 75% of your variable pay rather than 100%. A smaller loan may provide better rates and more lender choice, particularly if your bonus is discretionary.
Get the right lender for your earnings
Bonus-based applications are not difficult because bonuses are unusual. They become difficult when they are put to a lender that does not understand or accept the income. The details matter: your industry, payment history, contract, credit profile and deposit can all alter the answer.
AMS Mortgages assesses complex income cases every day and can identify lenders that look beyond a basic salary. If a mainstream lender has ignored your bonus, commission or overtime, do not assume your plans have stopped. Get the case assessed properly, present the evidence clearly and let the right lender make the decision.
