When applying for a home loan, one of the first questions most borrowers ask is: "How much can I borrow?" Your borrowing capacity determines your budget and shapes your property search, but the calculation isn't as simple as multiplying your income by a set number.
Lenders assess multiple factors to determine how much they're willing to lend you. Understanding what they look at can help you strengthen your application and set realistic expectations before you start house hunting.
What Is Borrowing Capacity?
Borrowing capacity is the maximum amount a lender is willing to loan you based on your financial situation. Each lender uses their own formula, which means your borrowing capacity can vary between banks and non-bank lenders.
The assessment considers your ability to service the loan both now and if interest rates rise. Lenders apply a buffer rate (typically 2-3% above the actual interest rate) to ensure you could still afford repayments in a higher rate environment.
Key factors that affect your borrowing capacity include:
- Your income (including salary, bonuses, rental income, and other earnings)
- Your existing debts and financial commitments (credit cards, personal loans, HECS debt)
- Your living expenses and spending habits
- The number of dependents you have
- Your employment type and job stability
How Income Affects Borrowing Power
Lenders look at your gross income, but they assess it differently depending on your employment type. Permanent full-time employees typically find it easier to demonstrate stable income, while casual workers, contractors, and self-employed borrowers may need to provide additional documentation.
For self-employed borrowers, lenders usually require two years of tax returns and financial statements. They'll assess your average income over that period, which means a strong recent year might not be enough if the previous year was weaker.
- Rental income from investment properties is typically assessed at 80% of the actual rent received
- Overtime and bonuses may only be included if you can demonstrate consistent earnings over time
- Some lenders cap the amount of income they'll accept from multiple jobs
- Centrelink payments and family benefits may be included, depending on the lender
Why Your Expenses Matter More Than You Think
Your spending habits directly impact how much you can borrow. Lenders use either your actual declared expenses or a benchmark minimum (the Household Expenditure Measure or HEM), whichever is higher.
High living costs reduce your borrowing capacity because they reduce your surplus income available for loan repayments. This is why lenders scrutinize your bank statements looking at discretionary spending on dining out, entertainment, subscriptions, and regular purchases.
Getting Pre-Approval Before You Search
Before you start attending open homes, getting pre-approval gives you a clear picture of your borrowing capacity and shows sellers you're a serious buyer.
Pre-approval involves a full assessment of your financial position. The lender reviews your income, expenses, debts, and credit history, then provides conditional approval for a loan amount. This approval is typically valid for 3-6 months.
Benefits of pre-approval include knowing your budget, strengthening your negotiating position, and speeding up the formal approval process once you find a property.
Steps to improve your borrowing capacity before applying:
- Pay down existing debts, particularly high-interest credit cards and personal loans
- Reduce credit card limits even if you pay them off in full each month (lenders assess based on limits, not balances)
- Close unused credit accounts and store cards that add to your available credit
- Review your spending and demonstrate consistent savings over at least three months before applying
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