🏦 Borrowing Power Tool
Know exactly how much you can borrow — before you start searching
Australia's lenders use complex serviceability calculations most buyers never see. Dajumo's Borrowing Capacity Calculator reverse-engineers those formulas so you shop with confidence, not guesswork.
How It Works
The lender's formula — in your hands
Australian banks assess your borrowing capacity using serviceability ratios, living expenses benchmarks (HEM), and APRA's 3% buffer. We model all of it.
01
Enter your financial picture
Income (PAYG, self-employed, rental), monthly expenses, existing debts and dependants. Takes under 3 minutes.
02
We apply bank-grade formulas
Dajumo runs your numbers through the same serviceability models the big four and second-tier lenders use, including the mandatory APRA 3% buffer.
03
See your true ceiling
Get a borrowing capacity range, the LVR you qualify for, and which lender structure suits your situation best.
04
Feed it into your deal analysis
Your borrowing capacity flows directly into Dajumo's Deal Scorer and Purchase Cost Estimator, so every number connects.
Why It Matters
Borrowing power varies by $300K+ across lenders
Most buyers walk into a single bank and accept whatever figure they're given. Dajumo shows you the full picture.
HEM Benchmarking
We compare your declared expenses against the Household Expenditure Measure lenders use — so no surprises at the bank.
Multi-Lender Modelling
ANZ, CBA, Westpac, NAB and 8 second-tier lenders modelled simultaneously. Pick the structure that maximises your capacity.
Investment-Specific Logic
Rental income inclusion rates, negative gearing impact, and portfolio debt stacking — all modelled correctly for investors.
Scenario Planning
What if you paid off your car loan? What if interest rates rose 1%? Run scenarios before you commit to anything.
FAQ
Common questions
How accurate is the borrowing capacity calculator?
Our calculator uses the same serviceability formulas as Australian lenders, including the APRA 3% buffer above the loan rate. Results are typically within 5–8% of a formal pre-approval. The full platform allows lender-by-lender comparison for greater precision.
Does this affect my credit score?
No. This is a soft calculation only — no credit check is performed. Your credit file is not touched at any point.
Can self-employed borrowers use this tool?
Yes. The full platform includes self-employed income assessment using a 2-year average of tax returns, with addbacks for depreciation and one-off expenses — the same method accountants use.
What is the APRA serviceability buffer?
Since 2021, APRA requires lenders to assess whether borrowers can still service a loan at their current rate plus 3%. So if your rate is 6.2%, you're tested at 9.2%. Our calculator automatically applies this buffer.
How is borrowing capacity different from pre-approval?
Borrowing capacity is an indicative ceiling — it's what you could theoretically borrow. Pre-approval is a conditional commitment from a specific lender after reviewing your documents. Think of our calculator as step one: understand your range, then pursue formal pre-approval with the right lender.