An income multiple is the factor a lender applies to your annual gross income to calculate the maximum amount they are willing to lend. In the UK, most mainstream lenders offer between 4 and 4.5 times your annual income, though some specialist lenders may go up to 5 or even 6 times for certain professional occupations or high earners.
For joint applications, lenders typically multiply the combined household income. So if you earn £40,000 and your partner earns £30,000, your combined income of £70,000 at a 4.5x multiple would give a maximum borrowing figure of £315,000.
While income multiples provide a useful starting point, they are not the whole picture. Lenders also conduct a detailed affordability assessment that looks at your regular outgoings, existing debts, living costs, and how you would cope if interest rates rose (the stress test). This means the actual amount you can borrow may be lower than the headline income multiple suggests, depending on your individual financial commitments.
You earn £45,000 per year. At a 4x income multiple, you could borrow up to £180,000. At 4.5x, that rises to £202,500. If you have a partner earning £35,000, your combined income is £80,000, giving maximum borrowing of £320,000 to £360,000 depending on the multiple. However, if you have significant existing debts or high living costs, the lender may offer less.
Key Points
- Most UK lenders offer 4 to 4.5 times your annual gross income
- Joint applicants can use their combined household income
- Some specialist lenders offer higher multiples (5–6x) for professionals or high earners
- The income multiple is a starting point — detailed affordability checks may reduce the actual offer
- Existing debts, childcare costs, and other outgoings reduce the amount you can borrow