Do lenders use net or gross income for borrowing capacity?

Gross or net? It is one of the most common points of confusion when people try to work out their borrowing power, and getting it wrong leads to wildly off estimates in both directions. The reality is that lenders use both, just at different stages, and understanding the sequence makes the whole thing clear.

Gross versus net, the basic difference

Gross income is what you earn before tax. Net income, or take home pay, is what lands in your account after tax and other deductions. The gap between the two can be substantial, which is exactly why mixing them up throws your borrowing estimate so far out.

What lenders start with

Lenders generally begin with your gross income as the headline figure, because that is the standard, verifiable measure across payslips and tax returns. So when you see income requirements or read about assessments, the starting point is usually the before tax number.

But they work down to your surplus

From that gross figure, a lender deducts tax, your assessed living expenses and your existing debt repayments. What is left is your surplus, the money genuinely available to service a new loan. That surplus, not the gross headline, is what really drives how much you can borrow.

Why gross alone overstates capacity

Looking only at gross income makes your capacity seem far larger than it is, because it ignores tax and the cost of living. Once tax and realistic expenses come out, the amount available for loan repayments is a good deal smaller, which is why a big salary does not always translate into a big loan.

How variable income is treated

Not all gross income is counted in full. Variable income such as overtime, bonuses and commission is often shaded, meaning a lender may count only a portion to allow for the fact it is not guaranteed. So two people with the same gross figure can be assessed differently depending on how stable their income is.

Self employed: which income figure

For self employed borrowers, lenders generally use the taxable income shown in tax returns and business financials, which is after business expenses. Some expenses may be added back, but the assessment is built on the declared figure, not your turnover, which is why keeping clean, up to date returns matters.

Why your take home feeling differs from the assessment

You might feel you have more spare cash than the lender allows, or less. That is because lenders measure expenses against a benchmark that may differ from your actual spending. The assessment is a standardised view, not a mirror of your bank statements, so it will not always match your lived experience.

How a broker reads your income

Because each lender treats gross income, variable income and expenses a little differently, a broker can read your income the way lenders will and match you to the one that assesses it most favourably. That is usually at no cost to you, since the lender pays the broker on settlement.