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Borrowing power calculator

Enter your take-home pay, what you spend and what you owe. You'll see roughly what a lender would lend at today's rate plus the regulator's buffer. Or start from one of four Sydney households and see where they land against what homes in their suburb actually sell for.

Start from an example household

6.48% is the RBA’s average variable rate on new owner-occupier loans for August 2026, 6.23% (RBA table F6), plus the 0.25 point move on 30 September 2026.

You could borrow roughly—Turn this estimate into pre-approval →
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    The assumptions, in full

    • Assessment rate is your rate plus 3 percentage points, the serviceability buffer APRA expects lenders to apply (APRA, System Risk Outlook May 2026).
    • A 30-year principal and interest loan, with your whole monthly surplus available for it.
    • Credit card limits count at 3.8% of the limit a month, standing in for the repayment a lender assumes.
    • Your living costs are used as entered. Lenders can replace a low figure with their own benchmark, so a low entry gives an optimistic answer.
    • You enter take-home pay, so the tool doesn’t have to estimate your tax.

    Buffer assumption: www.apra.gov.au, retrieved 2026-07-16.

    Who can afford the local median?

    We made these four households up. Their prices we didn’t: each is buying at the median sale in its postcode for the March 2026 quarter from the NSW Rent and Sales Report, and take-home pay uses the ATO’s 2026–27 resident rates and the Medicare levy, ignoring offsets and HELP debt. Transfer duty comes on top of the loan, paid from savings.

    HouseholdTake-homeCould borrowLoan the median needs, before dutyRoom or gap
    First home in Hornsby$141,360$848,706$675,000$173,706 spare
    Buying alone in Epping$97,880$516,642$697,000$180,358 short
    A bigger unit in Chatswood$201,510$1,232,137$928,000$304,137 spare
    Upgrading to a Turramurra house$242,610$1,200,567$2,063,000$862,433 short

    The Hornsby couple are fine. A $675,000 loan on the $750,000 median unit sits well inside their estimate, and as first home buyers under $800,000 they pay no transfer duty.

    The Epping buyer runs into the one-income problem. On a salary of $130,000, the estimate comes to $516,642, about $180,358 short of what the $820,000 median unit needs. Clear the $450 a month car loan and cancel the $15,000 of card limits and it rises to $638,158. That’s $121,516 more, and still not enough. Closing the rest takes a bigger deposit, a guarantor, or a cheaper unit.

    The Turramurra family show the opposite problem. Their income is high, but a $3,263,000 house with $1,200,000 going in still needs $2,063,000, and the estimate stops at $1,200,567. Upgrading on the upper North Shore is usually limited by the loan, not the deposit, and loans that size are Sina’s work: the lender with the best rate is rarely the one whose rules stretch furthest.

    Why your number is lower than a repayment calculator suggests

    A lender doesn’t ask whether you can pay the loan at today’s rate. It asks whether you could at 3 points more. At 6.48% that’s 9.48%, and that one rule explains most of the gap between what you think you could repay and what a bank will lend. It’s a stress test rather than a forecast, and every bank runs it.

    What lenders do differently, and what we can’t change

    This page uses one method. Lenders each count bonuses, overtime, rent and self-employed income in their own way, and some cut the borrowing on high incomes or on loans above a set size, so the same household can get answers six figures apart. Finding the lender whose rules fit your income is most of the job. What we can’t do is talk a lender out of its expense benchmark, or make a new business income read like a salary before it has the tax returns behind it that a lender wants to see.

    We’d plan around the repayment you’re comfortable with, not the most a lender will approve, and buyers’ agents often see that differently. Ansa runs our first-home work, and the first number he asks for is the weekly repayment you’d be comfortable with on the repayment calculator, before any borrowing estimate. Duty sits on top of all of it, and the stamp duty calculator uses the same four households.

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    Borrowing power questions

    Not covered here? Call (02) 7229 7363 or send us the question, and a real broker replies within one business day.

    How do lenders work out how much I can borrow?

    They take your income after tax, subtract your living costs (or their own benchmark, if it's higher) and your other repayments, and ask what loan the money left over could repay at a rate well above today's. Every lender runs its own version, with different rules for bonuses, rent, cards and expenses, which is why the same household gets different answers.

    Why is a buffer added to the interest rate?

    APRA expects lenders to test that you could still repay if rates rose. It has set that buffer at 3 percentage points above the loan rate since 2021, so a 6.48% loan is assessed as if it cost 9.48%.

    Do credit card limits really reduce my borrowing power?

    Yes, the limit rather than the balance. Lenders assume you could use the whole limit, so a card you clear every month still counts. Cutting limits you don't use is the quickest fix there is, and on this page it's worth tens of thousands of dollars of borrowing for some of the example households.

    Is this the same as pre-approval?

    No. It's an estimate from one standard method with the assumptions printed. Pre-approval is a lender reading your documents and agreeing, with conditions, to lend. That's the number you can bid with.

    Will using this calculator affect my credit score?

    No. It runs in your browser. Nothing is sent to us or to a lender, and no credit check happens.

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