Borrowing capacity calculator.
A rough indication of what a typical lender would lend you, based on income, household, expenses and existing debts. Includes the APRA stress-test buffer.

- Combined gross income
- $300,000
- Net monthly income
- $18,273
- Estimated living costs
- $4,175
- Monthly surplus
- $13,498
- Stress-test rate
- 9.00% p.a.
This is a rough indication, not a lender pre-approval. Every lender applies its own serviceability formula, HEM tables, and shading for variable income. The number you see here is what a typical lender would land at; specific lenders can come in 10-15% above or below. For a real number against a real lender, have a chat.
How accurate this borrowing estimate is.
The number this returns is what a typical lender's serviceability formula would land at. The 50+ lenders on the OPES panel each have their own variant, and the spread between them is wider than most clients expect.
- Spread across lenders is real. The same file can be offered $850k at one lender and $1.1m at another, just on policy differences around HECS, bonuses or rental income. The owner-occupied lending page covers how the 50+ panel actually splits on capacity.
- The cheapest way to lift capacity. Cancel unused credit cards (or reduce limits), pay off small consumer loans, and avoid taking on new debt in the 6 months before applying. Each $100 of monthly debt service reduces capacity by roughly $15,000.
- Income type matters. PAYG full-time is treated most favourably. Variable bonus, commission and self-employed income gets shaded, typically 80% of bonus and a 2-year average for self-employed. The calculator assumes 100% PAYG. Once you have a capacity figure, the repayment estimator shows what the monthly looks like.
Common questions
Continue reading
- Home loan calculatorOnce you know what you can borrow, work out the monthly repayment.
- Refinance calculatorAlready have a loan — see what refinancing would save.
- Finance brokingThe 50+ lender panel and how lender selection actually works.
- Home loansOwner-occupied lending in depth.
- Stamp duty calculatorThe other upfront number to budget against deposit.
- First home buyer loansSchemes that lift effective capacity for FHBs.
Want the real capacity number?
We'll run your file across the panel and tell you which lender returns the highest capacity for your specific income type, credit profile and household. Free, no commitment.