How Commission Income Works for Mortgage Purposes
Commission income falls into the broader category of variable earnings that lenders assess alongside your basic salary. However, commission has its own specific characteristics that lenders take into account when evaluating your remortgage application.
From a lender's perspective, commission income is categorised broadly into two types:
Commission on top of a basic salary. This is the most common arrangement, where you receive a guaranteed base salary supplemented by commission payments based on your sales or performance. Lenders are generally comfortable with this structure because there is a guaranteed income floor, with the commission providing an uplift.
Fully commission-based or self-employed commission. If your income is entirely or predominantly commission-based, with little or no guaranteed salary, lenders will treat this more cautiously. Some may assess you similarly to a self-employed applicant, requiring more extensive documentation such as tax returns and accounts.
The way lenders calculate commission typically involves averaging your commission earnings over a period of time. Most will look at the last 12 months of commission payments, though some may examine six months or up to three years. The average figure is then used as the commission element of your income for affordability purposes.
As with other types of variable income, lenders do not always count 100 per cent of your average commission. Many apply a discount of between 25 and 50 per cent, while some more favourable lenders will accept the full average amount. This discount reflects the lender's assessment of the risk that future commission may be lower than the historical average.
Some lenders also consider the trend in your commission earnings. If your commission has been growing steadily over two or three years, some lenders may give more weight to your most recent earnings. Conversely, if commission has been declining, lenders may use a lower figure than the average to account for the downward trend.
The specific industry you work in can also influence how lenders view your commission. Industries with established commission cultures, such as estate agency, recruitment and financial services, are well understood by most lenders. More niche or unusual commission structures may require additional explanation.
Documentation You Need for Commission Income
Thorough documentation is particularly important when your income includes a commission element. Lenders need to verify not only the amounts you have earned but also that the commission structure is ongoing and sustainable.
The essential documents you should prepare include:
- Payslips - At least six months, ideally twelve, showing your basic salary and commission as separate line items. Commission should be clearly identifiable and not bundled with other payments such as expenses or allowances
- P60s - Your annual tax summaries for the last two to three years. These confirm your total annual earnings and allow the lender to see the overall contribution of commission to your income
- Employment contract - Detailing your basic salary, commission structure, targets and payment frequency. This helps the lender understand how your commission is calculated and what drives it
- Commission schedule or plan - If your employer has a formal commission plan document, this provides detailed information about the structure, rates and any caps or accelerators that apply
- Employer letter - Confirming your role, commission structure, average commission earnings and the expected continuation of the scheme. This is particularly valuable for reassuring lenders about the ongoing nature of your commission income
If your commission fluctuates significantly from month to month, providing a breakdown of monthly commission over the last one to two years can be helpful. This allows the lender to see the full range of your earnings and calculate a meaningful average.
For borrowers who are paid commission quarterly or annually rather than monthly, the standard three-month payslip request may not capture any commission payments. In these cases, providing payslips covering at least one full commission payment cycle, along with P60s, gives the lender the information they need.
It is also wise to keep records of any commission statements or reports you receive from your employer. These internal documents may not be required by the lender, but they can be useful for clarifying any questions that arise during the underwriting process.
Strategies to Maximise Commission Income for Remortgaging
Commission earners can take several proactive steps to ensure their income is fully recognised and maximised in the remortgage application process.
Build a strong track record. The longer you have been earning commission consistently, the more weight it carries with lenders. If you have recently moved into a commission-based role, consider waiting until you have at least 12 months of commission history before applying. Two years is even better for lenders who want a more established pattern.
Keep detailed records of your commission. Maintain a personal record of your monthly commission earnings alongside your payslips. This makes it easy to demonstrate your earning pattern and quickly calculate averages when needed. If there are months where commission was unusually low or high, noting the reasons can help you explain any anomalies to the lender.
Choose the right lender. Some lenders are far more generous than others in how they treat commission income. A few will count 100 per cent of your average commission with no cap, while others may only count 50 per cent or cap the commission element relative to your basic salary. A whole-of-market broker can match you with the lender that gives you the best result.
Present your commission structure clearly. If your commission scheme is complex, with multiple tiers, accelerators or different rates for different products, consider preparing a brief summary that explains how it works. This can save time during the underwriting process and prevent misunderstandings that could result in your commission being undervalued.
Time your application strategically. If your commission tends to be higher at certain times of year, applying when your recent payslips show strong commission earnings can be advantageous. While lenders look at averages, having strong recent figures sets a positive impression and may benefit you with lenders who weight recent earnings more heavily.
Reduce your debt-to-income ratio. Clearing credit card balances, personal loans and other commitments before applying frees up more of your income for mortgage affordability. For commission earners, this is particularly important because only a portion of your commission may be counted, making every pound of uncommitted income more valuable.