How Much Income Do You Need to Buy a House in Australia?

The honest answer starts with a definition. “Income needed” could mean the smallest salary a particular bank will approve, the income that keeps repayments below a chosen household budget, or the income needed to buy the median house without spending every available dollar. Those are different questions.

This guide answers the second one. It calculates a principal-and- interest repayment, sets that repayment to a chosen percentage of after-tax income, then works backwards through 2026–27 income tax, Medicare levy and HELP repayments to find the gross salary. It separately calculates the deposit, state transfer duty, registration fees, indicative conveyancing and inspections, and LMI where relevant.

The default planning limit is 30% of take-home pay. That is not presented as a government standard or a lender rule. It simply means that 70% of after-tax income remains before rates, insurance, maintenance, utilities and every non-housing expense. Move the slider to 25% for more headroom or 40% to test a tighter budget.

Start with the price and state, then change the deposit, mortgage rate, loan term and share of take-home pay. Choose one income or two equal take-home contributions. If one or both contributors have HELP debt, the engine includes the 2026–27 compulsory repayment when it reverses the required net income back to gross salary.

A statewide average can hide the question most buyers are actually asking, so the reference table uses the ABS median established-house transfer price for each capital city. It is a sales median, not a valuation of every home: half the houses transferred in the quarter sold below it and half above it.

These city figures should not be read as one price for an entire state. The ABS publishes separate rest-of-state series, and a buyer choosing an apartment, townhouse, regional centre or outer suburb can face a materially different price. The interactive tool accepts the actual price being considered.

The calculation is a chain. Each link is visible so a reader can replace an assumption instead of accepting a black-box “borrowing power” result.

The reverse-tax step treats each contributor as an Australian resident employee and includes the 2026–27 tax brackets, Medicare levy, LITO where applicable and the new $1,000 instant work-related deduction. It assumes no salary sacrifice, other deductions or Medicare Levy Surcharge because full-year hospital cover is held.

The result deliberately does not add rates, home insurance, repairs or owners-corporation fees to the mortgage payment. Those costs vary by property and belong in the 70% of take-home left by the default setting. If they are unusually high, reduce the mortgage-share slider so the income target leaves more room.

Search questions often name a home price rather than a city. With a 20% deposit, state duty changes the upfront cash but not the loan principal, so the income benchmark below is usable across states. A $700,000 home produces a $560,000 mortgage and about $3,412 per month at 6.15%.

The relationship is not perfectly linear once repayments are reversed through personal tax. Higher required take-home moves income through different brackets, Medicare and offsets. That is also why one person earning the entire amount needs more gross salary than two people producing equal take-home shares.

A 20% deposit on a $800,000 property is $160,000, but settlement cash can also include transfer duty, title and mortgage registration, conveyancing, inspections and adjustments for rates or strata levies. The calculator shows a low-to- high estimate internally and uses the midpoint for its headline upfront figure.

What changes below a 20% deposit

At a deposit below 20%, many lenders require Lenders Mortgage Insurance. LMI protects the lender, not the buyer. Its cost depends on the lender, insurer, loan size, LVR, occupancy and borrower details. The tool's figure is indicative and should be replaced with a lender quote.

If LMI is capitalised, it is added to the mortgage and increases both repayments and interest; it should not also be counted as cash paid at settlement. If it is paid upfront, the loan is smaller but the cash hurdle is higher. The engine keeps those paths separate.

• 20% deposit: no LMI in the model and the smallest loan, but the largest deposit target.
• 10% deposit: lower deposit cash, normally an LMI estimate, higher loan and higher repayment.
• 5% deposit: the smallest deposit but the highest leverage; an eligible government guarantee can remove LMI but does not reduce the loan or repayment.

The RBA reported an average 6.15% rate on new owner-occupier principal-and-interest loans for May 2026. That is a market average, not a quote: a buyer's rate can be higher or lower and can change before or after settlement.

APRA's prudential standard requires regulated banks to apply a serviceability buffer of at least 3 percentage points over the loan rate. At 6.15%, the minimum buffered rate is therefore 9.15%. The buffer is an assessment safeguard; it is not the rate the borrower starts paying.

MoneyToolkit recalculates the mortgage at both rates and applies the same take-home budget share to each. That makes the interest-rate sensitivity understandable, but it is still not a reproduction of a bank assessment. A lender deducts assessed living expenses and other commitments rather than simply allowing a fixed percentage of net pay.

Australia assesses individual income tax separately. A couple does not lodge one joint income-tax return or pool its tax brackets. When two people each contribute half the required take-home, each person uses their own tax-free threshold, brackets and offsets. Consequently, the combined gross salary needed is normally lower than when one person must generate all of the same household take-home.

The calculator's two-income mode equalises after-tax contributions, not gross salaries. If one contributor has HELP and the other does not, the HELP debtor needs more gross income to produce the same take-home share, so the displayed split can differ.

Real couples rarely split costs exactly 50/50. Treat this mode as a clean comparison. For an uneven household, calculate each contributor's target take-home separately with the income-tax calculator and add the results.

From 2025–26, compulsory HELP repayments use a marginal schedule. For 2026–27, repayments begin once repayment income exceeds $69,528. The amount is an additional cash outflow through the tax system, so a HELP debtor needs more gross salary to reach the same post-tax household target.

That does not mean every lender turns the repayment into the same borrowing-power reduction. Banks can model study debt commitments in different ways, and a small balance near repayment may be treated differently from a debt expected to remain for years. The article engine assumes a debt large enough that the normal compulsory repayment is not capped by the remaining balance.

State and territory first-home buyer rules mainly change transfer duty and grants. A duty exemption can reduce cash required at settlement, but it does not reduce the home price or mortgage unless the saved cash is added to the deposit. Eligibility depends on matters such as prior ownership, occupancy, property type, value, contract date and sometimes location. The interactive toggle applies the current engine rule for an eligible established-home owner-occupier; it is not an eligibility test.

The Australian Government 5% Deposit Scheme

From 1 October 2025, the expanded scheme has no income caps, no waitlist and no LMI for eligible first-home buyers with at least a 5% deposit. It still has location-specific property price caps and applications go through participating lenders. Both the purchase price and lender-assessed value must remain within the applicable cap.

The guarantee removes an LMI cost; it is not a cash grant and does not pay part of the mortgage for the buyer. A 95% loan remains a 95% loan, so its repayment and exposure to price or rate changes remain much higher than with a 20% deposit. In the tool, select the no-LMI path only after checking scheme or lender-waiver eligibility.

The calculation so far answers whether a repayment fits a chosen after-tax budget. Credit assessment is broader. APRA sets system-level guardrails, but each lender remains responsible for deciding whether a borrower can service the loan and whether the property is acceptable security.

• Income quality: base salary, probation, casual or self-employed history, overtime, bonuses, rent and other income may receive different treatment.
• Living expenses: the lender compares declared spending with its minimum benchmark and may use the higher figure.
• Other commitments: personal loans, car finance, buy-now-pay-later accounts, child support and credit-card limits can reduce capacity even when unused.
• Household facts: dependants, relationship status, housing costs and expected changes can alter the assessment.
• Loan and property: LVR, term, rate, repayment type, valuation, postcode and property type all matter.

APRA also limits each regulated bank to no more than 20% of new owner-occupier lending at debt-to-income ratios of six times or more. That is a portfolio limit, not an automatic ban on every borrower at 6× DTI. The calculator displays DTI for context without turning it into an approval decision. Its ratio includes only the modelled mortgage; a lender includes other debts when applying its DTI definition.

• Enter the actual property price and a realistic rate—not the maximum listing price or a temporary promotional rate without checking its conditions.
• Compare 5%, 10% and 20% deposits. Record both the cash-to-settlement result and the repayment; a smaller cash hurdle can create a much larger loan.
• Set the take-home share from a real household budget that includes rates, insurance, maintenance, strata where relevant and an emergency margin.
• Switch between one and two contributors and add HELP debtors. Do not treat a partner's gross salary as if Australia taxed the household jointly.
• Read the product-rate and buffered figures together. Then test at least one rate above both if the budget has little room.
• Confirm duty and first-home eligibility with the relevant revenue office, obtain an LMI or scheme assessment from a participating lender, and seek pre-approval before making an unconditional offer.

The most useful output is not one heroic maximum. It is a range: the price that leaves comfortable monthly headroom, the cash needed to settle, and the higher-rate repayment the household could absorb without depending on every assumption going right.