How Borrowing Capacity Is Actually Calculated
A lot of first-time buyers assume borrowing capacity is simply a multiple of income. In practice, lenders run a more detailed assessment, and the result can surprise people in either direction.
What lenders actually assess
- Gross income, and how stable or variable it is
- Existing debts, including credit cards and buy-now-pay-later, even if unused
- Living expenses, assessed against a benchmark, not just what you report
- The interest rate buffer lenders apply on top of the current rate, to test affordability if rates rise
Why two people on the same income can get different results
Existing debt and expense patterns matter as much as income. This is also where the choice between a fixed and a variable rate can affect what a lender is willing to approve, since some lenders assess fixed-rate applications slightly differently.
Pre-approval isn’t a guarantee
Pre-approval gives you a working figure, but final approval happens against the specific property, so a change in your circumstances or the property itself can still affect the outcome. If your borrowing capacity is close to your target price, it’s worth speaking to a broker or lender directly, such as Vista Financial Group, before you start bidding or making offers.
Where this fits in your overall plan
Understanding your ceiling before you start looking at property saves a lot of disappointment later. See our first-home buyer’s guide for how this fits into the wider process.
