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Borrowing capacity calculator

There’s a difference between what you’d like to borrow and what a lender will actually approve, and that gap catches a lot of buyers out.

Our borrowing capacity calculator estimates the figure a lender is likely to land on, based on your income, expenses and financial position, so you know where you genuinely stand.

Think of it as the lender’s-eye view, alongside our Buying Power Calculator, which looks at the same question from the property price side.

How lenders actually stress-test your capacity

We cover the full list of factors that shape your borrowing power, income, expenses, debts, deposit and credit history on our Buying Power Calculator page. Here, it’s worth understanding the one thing that trips people up most: the assessment rate.

Lenders don’t just check whether you can afford repayments at today’s rate. Under guidance from the Australian Prudential Regulation Authority (APRA), they test your repayments at a buffer above it, typically a minimum of three percentage points, to make sure you’d still cope if rates rose. That’s usually why the number from one lender can look more conservative than you’d expect.

How this calculator helps

  • Shows a realistic loan amount rather than a best-case guess.
  • Highlights how sensitive your capacity is to expenses and existing debt.
  • Prepares you for the conversation about pre-approval before you have it.
  • Flags when it’s worth waiting, paying down a debt or adjusting your deposit first.

Why two lenders can give you two different answers

Every lender applies its own policy on top of the same basic inputs, which is why your capacity can genuinely vary from bank to bank.

  • Some weigh rental income, bonuses or self-employed earnings more conservatively than others.
  • Living expense benchmarks differ between lenders, and some apply a higher buffer than the regulatory minimum.
  • A lender that’s actively chasing new customers in your loan bracket may simply price more competitively at that point in time.

This is exactly where a broker earns their keep. We know which lenders tend to look more favourably on your particular situation, rather than sending you to the first one that comes to mind.

FAQs

Why did two lenders quote me different amounts?

Each applies its own serviceability policy on top of the regulatory minimum, so it’s genuinely normal to see a spread across lenders.

Does pre-approval lock in this exact amount?

It’s a strong indication, not a guarantee. Your final approval depends on the property, your finances at the time and the lender’s assessment.

How often should I get my capacity reassessed?

Any time your income, expenses or debts shift meaningfully, or if you’re planning to buy more than a few months from now.

Does the cash rate directly change this number?

Indirectly, yes. As lenders adjust their rates, your assessed repayment (and therefore your capacity) shifts too.

I'm self-employed. Does that change things?

It can. Lenders typically want a longer income history to assess self-employed applicants, so it’s worth planning a little further ahead.

Want to know what you'd actually be approved for, not just estimated for?

Book a confidential, no-obligation chat with an Apt Wealth Finance specialist.

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