How Much Can I Borrow for a Car Loan? (Australian Lender Guide)

The amount you can borrow for a car loan is the maximum a lender will approve after assessing your verified income, living expenses benchmarked against the Household Expenditure Measure (HEM), existing debts and credit limits under responsible-lending rules. Most approved limits come down to your monthly surplus after a serviceability buffer, matched to a loan term of 1 to 7 years. Only a formal credit assessment confirms your true figure; online calculators are estimates only.

• What determines how much you can borrow for a car loan
• How to work out your car loan borrowing capacity
• What you'll need before you apply
• How your credit, deposit and existing debts change your limit
• Why GO2 Finance for your car loan

Last updated: 15 June 2026

Quick answer

The amount you can borrow for a car loan is the maximum a lender will approve after assessing your verified income, living expenses benchmarked against the Household Expenditure Measure (HEM), existing debts and credit limits under responsible-lending rules. Most approved limits come down to your monthly surplus after a serviceability buffer, matched to a loan term of 1 to 7 years. Only a formal credit assessment confirms your true figure; online calculators are estimates only.

Key takeaways

• Lenders must make reasonable inquiries into your finances under Chapter 3 of the NCCP Act before approving a car loan (asic.gov.au).
• ASIC's RG 209 requires lenders to verify both income and expenses; you can't just declare a low spend (asic.gov.au).
• Since Westpac's $35m penalty in 2018, lenders assess the higher of your declared expenses and the HEM benchmark (asic.gov.au).
• A serviceability buffer stress-tests repayments, so your limit is lower than a raw income multiple suggests (asic.gov.au).
• An unused credit card cuts your borrowing power because lenders count the full limit, not the balance.
• Car loan terms run 1 to 7 years; a longer term lowers repayments and can lift your maximum limit (canstar.com.au).

Most borrowing-power guides tell you lenders "look at your income and expenses" and leave it there. That's not enough to set a realistic budget. This article opens the lender's actual calculator: the HEM living-expense floor, how income gets "shaded", the serviceability buffer stress-test, and the credit-card trap that quietly slices thousands off approved limits.

I'm Brent Geihlick, Director at GO2 Finance, and I run these numbers for Australian car buyers every week. This guide is for anyone trying to set a realistic budget before applying — so you shop for the right car instead of falling in love with the wrong one. If you'd rather skip the maths, a quick chat with our team gets you a realistic figure with no credit hits.

What determines how much you can borrow for a car loan

Your car loan borrowing capacity is set by five inputs: verified income, living expenses, existing debts and credit limits, your credit profile, and the loan term and deposit you choose. Lenders combine these into a surplus-income calculation, and that surplus — not your gross salary — decides how much you can borrow for a car loan. You can browse your car loan options with that framing in mind.

None of this is optional for the lender. Under Chapter 3 of the National Consumer Credit Protection Act 2009 (NCCP Act), lenders must make reasonable inquiries into your financial situation to ensure the loan is not unsuitable (asic.gov.au). ASIC, the regulator, states it directly: "Credit licensees must comply with the responsible lending conduct obligations in Chapter 3 of the National Consumer Credit Protection Act 2009 (National Credit Act). The key concept is that credit licensees must not enter into a credit contract... if the credit contract is unsuitable for the consumer." (asic.gov.au)

Here's the part most guides skip: not all income counts equally. Lenders "shade" less reliable income types, meaning they only assess a portion of it. On an $80,000 base salary your full pay counts, but if $10,000 of that is overtime, a lender may assess only $8,000 of it. Run any estimate using that shaded figure, not your gross payslip.

Do lenders count casual income and overtime?

Casual income and overtime are counted by most lenders, but typically at a reduced rate of around 80% because the income isn't guaranteed. Steady permanent PAYG pay is counted in full. If you've held a casual role for over 12 months with consistent hours, more of it gets counted, and some lenders treat long-tenure casuals close to permanent staff.

What is the HEM benchmark in car finance?

The Household Expenditure Measure (HEM) is a statistical benchmark of minimum living costs that lenders use as a floor when assessing your expenses. If you declare $1,800 a month but HEM for your household type sets the floor at $2,400, the lender uses $2,400. Declaring frugal numbers doesn't lift your limit. This practice became industry-wide after Westpac was penalised $35 million in 2018 for relying solely on HEM rather than borrowers' declared expenses (asic.gov.au). Lenders now take the higher of your declared spend and HEM, then verify it through bank statements.

How to work out your car loan borrowing capacity

Car loan borrowing capacity is calculated by taking your shaded monthly income, subtracting living expenses and existing debt commitments, applying a serviceability buffer, then converting the surplus into a loan amount over your chosen term. Follow these steps to replicate what the lender does:

1. Total your verified monthly income. Add net income, applying shading to overtime, bonuses and casual pay.
2. Subtract your living expenses. Use realistic figures; lenders assess the higher of your declared spend and the HEM benchmark.
3. Deduct existing debt commitments. Include loan repayments and the full limit of any credit cards, not just the balance.
4. Apply the serviceability buffer. Lenders stress-test repayments at a higher interest rate to confirm you could still afford them if rates rose.
5. Convert surplus income into a loan amount. Match your affordable repayment to a term of 1 to 7 years; a longer term lowers the repayment and can raise your maximum limit (canstar.com.au).
6. Confirm with a formal assessment. Treat your estimate as a guide only — a lender's credit assessment sets your true limit.

Here's the buffer in action. Say you clear $5,500 a month, HEM-assessed expenses are $2,800, and you pay $400 on other debts. Your surplus is $2,300. A $700 monthly repayment might get stress-tested at $850. That still fits, so the loan services. If your surplus were $800, the same loan would likely fail even though the actual repayment looks affordable on paper. This verification process is required under ASIC's Regulatory Guide 209 (RG 209), which ensures new credit doesn't cause substantial hardship (asic.gov.au).

Illustrative example: Sarah earns $80,000 in a permanent PAYG role and wants a used Toyota RAV4 with a $35,000 loan over 5 years. With modest expenses and no other debts, her surplus comfortably covers the buffered repayment and she is approved for the full amount.

Can I use a car loan borrowing power calculator?

Borrowing power calculators give a useful starting estimate, but they cannot confirm your limit because they don't verify your income, shade it, or apply HEM. Only a formal credit assessment sets your true figure. Start with our car loan repayment calculator to test repayments at different amounts, then use the income assessment calculator to see how a lender is likely to view your pay.

What you'll need before you apply

A car loan application requires proof of identity, verified income, expense detail, existing debt statements and, ideally, vehicle details. Lenders cannot approve a car loan without verifying income — that's a core NCCP obligation — so gather these before you apply:

• Driver's licence or passport plus a secondary ID
• Two or three recent payslips, or tax returns if self-employed
• 90 days of bank statements showing income and living expenses
• Statements for existing loans and every credit card (limits, not just balances)
• Evidence of your deposit or trade-in value
• Vehicle details if you've found the car (make, model, price, seller)

Having this ready shortens approval from days to hours with many lenders. It also helps you compare car loan types on a like-for-like basis, because a secured loan against the car usually delivers a lower rate and a higher limit than an unsecured personal loan.

Can I get pre-approval before I start shopping?

Pre-approval is available from most lenders and gives you a confirmed budget before you visit a dealership or bid at auction. It is a conditional yes based on your verified financials, typically valid for 30 to 90 days. Shopping with pre-approval means you negotiate as a cash-equivalent buyer and never commit to a car outside your capacity.

How your credit, deposit and existing debts change your limit

Your credit score, deposit size and existing credit limits directly shift your maximum car loan up or down, often by more than your salary does. A stronger score widens lender choice and pricing; a deposit shrinks the amount you need to service; and unused credit cards quietly eat capacity in ways that catch many borrowers off guard.

Under Comprehensive Credit Reporting (CCR), lenders see your full repayment history across Equifax, Experian and Illion, not just defaults. A clean history opens more of the market. A patchy one narrows it but rarely closes it, and specialist car loans for bad credit exist for exactly that situation. If you have no credit file at all, our guide to a first car loan with no credit history covers how lenders assess thin files.

The rules are designed to protect, not exclude. Former ASIC Commissioner Peter Boxall put it this way: "The new responsible lending requirements in the National Credit Act are an important protection for consumers, but they should not be an inflexible barrier to credit for any segment of the population, and should not prevent consumers obtaining credit that they can reasonably afford." (asic.gov.au)

Borrowing habits are also shifting. As at June 2025, the Reserve Bank of Australia noted that bank fee revenue from personal lending had declined as consumers consolidated debt and changed spending habits (rba.gov.au). Lenders are responding by scrutinising existing commitments more closely, which makes the next two points worth understanding before you apply.

How much deposit do I need for a car loan?

No minimum deposit is strictly required, and strong applicants can finance 100% of the purchase price, but a 10–20% deposit lowers the loan, reduces the repayment and generally improves approval odds. On a $40,000 car, a $6,000 deposit trims roughly $120 a month off a 5-year repayment, which flows directly back into your assessed surplus.

How do existing credit cards reduce your borrowing power?

Credit cards reduce borrowing power because lenders assess the full limit as a potential debt, typically assuming a monthly commitment of around 3% of the limit regardless of the balance. A $10,000 unused card is treated as roughly $300 a month of committed spend. Over a 5-year car loan, $300 a month services around $15,000 of borrowing. One dormant card can therefore cut your maximum by five figures.

Illustrative example: James sought $40,000 for a near-new Mazda CX-5 over 7 years on shaded casual income, while holding a $10,000 unused credit card. His initial assessment came in at around $30,000. Closing the card and keeping the longer term lifted his approved limit back toward his target.

Not sure where you land? Get a realistic capacity check before you apply, so the only application on your file is one that fits. Call 0440 131 621 or send a quick enquiry.

Why GO2 Finance for your car loan

GO2 Finance is an Australia-wide broker that works out your real borrowing capacity before you shop, then matches you to the lender whose policy suits your income and credit profile. Here's what that looks like in practice:

• You deal directly with me, Brent Geihlick, and I personally review complex or non-standard car loan applications; read more about my finance broking background first.
• We quote across 50+ lenders, so shaded income or a thin credit file gets matched to the right lender rather than declined by the wrong one.
• You get an honest capacity figure before you shop, not a hopeful one after you've signed a dealer contract.
• Quotes come with no credit hits, so checking your options doesn't affect your score.
• We know which lenders shade overtime lightly, which accept casuals early, and how each one applies HEM — see how using a broker versus a bank for your car loan compares.
• There's no obligation at any stage.

What I see at GO2 Finance, time and again, is capable borrowers knocked back over something avoidable: an unused credit card they'd forgotten about, casual income shaded harder than expected, or a declared expense figure that sits below HEM and triggers extra scrutiny. Almost every one of those outcomes could have been prevented with a ten-minute file review before submission.

Want your real number? Send an online enquiry or make a short phone call to 0440 131 621 and I'll work out what you can genuinely borrow, with zero surprises.

Frequently asked questions

How much of my income can go towards a car loan?

Most lenders want your total debt repayments, including the new car loan, to fit comfortably inside the surplus remaining after HEM-benchmarked living expenses and a serviceability buffer. As a rough guide, keeping all repayments under about 30% of net income leaves adequate room for the stress test and everyday costs.

What credit score is needed to borrow $30,000 for a car?

There is no single cut-off score for a $30,000 car loan. A good Equifax score (broadly 622 and above) opens most lenders and sharper rates, while lower scores narrow the field to specialist lenders. Income, expenses and existing debts carry just as much weight as the score itself.

Does a car loan affect my mortgage borrowing power?

Yes, a car loan is an ongoing commitment that reduces the surplus income a home lender uses to calculate your capacity, so a $700 monthly car repayment can cut future mortgage borrowing power by tens of thousands. Factor any home-buying plans into your decision before setting your car loan term (asic.gov.au).

Can I get a car loan for 100% of the purchase price?

Sometimes. Strong applicants with clean credit and solid surplus income can finance the full price, and occasionally on-road costs too. A deposit still helps: it reduces the loan amount and repayments, improves approval odds, and can secure better terms on older vehicles or thinner credit files.

How do lenders calculate living expenses for a car loan?

Lenders take your declared expenses, compare them to the Household Expenditure Measure benchmark for your household type, and assess against the higher figure. They verify the numbers through bank statements, Comprehensive Credit Reporting and open banking, so under-declaring your spend does not increase your limit (asic.gov.au).

Sources

1. asic.gov.au — Responsible lending
2. asic.gov.au — Westpac admits to breaching responsible lending obligations (2018)
3. asic.gov.au — ASIC updates guidance on responsible lending obligations (2011)
4. rba.gov.au — Bank fees in Australia (May 2026 Bulletin)
5. canstar.com.au — How much can I borrow with a car loan?

About the Author

Brent Geihlick — Director, GO2 Finance

Brent Geihlick is the Director at GO2 Finance and an ASIC-registered Credit Representative (number 565185), operating under Australian Credit Representative 563274. He is a member of the Finance Brokers Association of Australasia (FBAA) and the Australian Financial Complaints Authority (AFCA, member 112294).

GO2 Finance is an Australia-wide finance broker working across a panel of 50+ lenders. The team helps consumer and business clients secure caravan, car, equipment, personal and commercial finance with no credit hits at the quote stage.

You can reach Brent directly by phone on 0440 131 621 or via the about page.

Disclaimer

This article is general information only and does not take into account your personal financial situation. Consider speaking with a licensed broker or financial adviser before making a decision.