🏦 Borrowing Power Calculator Australia: How Much Can I Borrow?

See roughly how much a bank will lend you before you apply.

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Formula at a glance

Borrowing Power Calculator: Max loan — monthly surplus × (1 − (1 + r)^−n) ÷ r, at rate + 3%. Example: Couple on $100,000 + $60,000, 1 child → Estimated borrowing power: $845,000
How the Borrowing Power Calculator works: Max loan — monthly surplus × (1 − (1 + r)^−n) ÷ r, at rate + 3%

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📘 About the Borrowing Power Calculator Australia

Lenders work out your monthly surplus — after-tax income minus living expenses (at least a benchmark for your household), other repayments and about 3.8% of credit card limits — and check you could still pay if rates rose 3 percentage points.

Many lenders also cap total debt at about 6 times gross income. Cutting credit card limits and other debts is often the fastest way to borrow more.

🧮 Formula

Max loan
monthly surplus × (1 − (1 + r)^−n) ÷ r, at rate + 3%

✏️ Worked examples

Couple on $100,000 + $60,000, 1 child

You enter
Your income before tax100,000 $
Partner's income before tax60,000 $
Dependants1
Living expenses a month3,000 $
Other loan repayments a month0 $
Total credit card limits0 $
Home loan interest rate6%
Loan term30 years
Deposit saved100,000 $
You get
Estimated borrowing power$845,000
Property price with your deposit$945,000
Repayment at 6%$5,066 a month
Assessed at (rate + 3% buffer)9%
Monthly surplus used$6,805
Living expenses used$3,850 a month (lender minimum)

$845,000.

Single, $90,000

You enter
Your income before tax90,000 $
Partner's income before tax0 $
Dependants0
Living expenses a month2,500 $
Other loan repayments a month0 $
Total credit card limits0 $
Home loan interest rate6%
Loan term30 years
Deposit saved100,000 $
You get
Estimated borrowing power$421,000
Property price with your deposit$521,000
Repayment at 6%$2,524 a month
Assessed at (rate + 3% buffer)9%
Monthly surplus used$3,390
Living expenses used$2,500 a month

$421,000.

🧭 How to use this calculator

What you enter

  • Your income before tax ($)
  • Partner's income before tax ($)
  • Dependants
  • Living expenses a month ($)
  • Other loan repayments a month ($)
  • Total credit card limits ($)
  • Home loan interest rate (%)
  • Loan term (years)
  • Deposit saved ($)

What you get

  • Estimated borrowing power
  • Property price with your deposit
  • Repayment at 6%
  • Assessed at (rate + 3% buffer)
  • Monthly surplus used
  • Living expenses used

❓ Frequently asked questions

How much can I borrow on $100,000 salary in Australia?

Typically around $500,000–$600,000 for a single person with no debts at a 6% rate, depending on the lender and expenses.

What is the serviceability buffer?

APRA expects lenders to check you can afford repayments at least 3 percentage points above your loan rate.

Do credit cards reduce borrowing power?

Yes — lenders count the limit, not the balance, at roughly 3–3.8% a month.

What is a debt-to-income ratio?

Total debt divided by gross income. Many lenders are cautious above 6.