How Lenders Calculate What You Can Borrow
Lenders assess your borrowing capacity by applying your income against your living expenses and existing debts, then stress-testing the result at a rate roughly 3 percentage points above the actual loan rate. A couple in New Lambton earning a combined $140,000 with minimal debts might expect to borrow around $700,000 to $750,000, though the final figure depends on the lender's policy, your deposit size, and how they treat certain expenses. Serviceability is recalculated every time you apply, so what you qualified for six months ago may not hold today if rates or your circumstances have shifted.
The Serviceability Buffer That Shapes Every Application
Every application is assessed at a rate higher than the one you'll actually pay. That buffer sits at 3 percentage points above the loan product rate, meaning if you're quoted a variable rate around 6%, the lender tests whether you can afford repayments at 9%. The buffer has been in place since October 2021 and applies across all banks and lenders regulated by APRA. It exists to protect borrowers from rate rises, but it also means your maximum borrowing limit is lower than it would be without the buffer. You can't negotiate the buffer away.
Income Treatment Across Employment Types
Salaried income is straightforward. Lenders take your base salary at full value, and most will include part of your overtime, allowances or bonuses if they've been consistent for at least three to six months. Self-employed income is assessed differently. Lenders typically average your last two years of tax returns, and they may add back certain deductions like depreciation. If your most recent year shows a dip, some lenders will weight the lower figure more heavily, which reduces your capacity. Borrowing capacity for sole traders and contractors hinges on what you've declared to the ATO, not what you've invoiced.
Consider a buyer who runs a small landscaping business out of New Lambton. They've earned $95,000 and $110,000 in their last two tax years after deductions. A lender using a straight average will assess income at $102,500, but if depreciation adds back another $8,000, the assessable income lifts to $110,500. That difference might increase borrowing capacity by $40,000 to $50,000, depending on other debts and expenses.
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How Your Deposit Size Affects What You Can Borrow
A larger deposit doesn't directly increase your income-based borrowing capacity, but it does reduce the amount you need to borrow and can eliminate the cost of LMI. Lenders mortgage insurance applies when your loan-to-value ratio exceeds 80 per cent. The premium can add several thousand dollars to your upfront costs or be capitalised into the loan, which increases your total debt. If you're borrowing close to your limit, adding LMI to the loan can push you over the lender's maximum and require you to find a bigger deposit or settle for a lower purchase price.
Some lenders will also adjust their serviceability policy based on your LVR. A buyer with a 10 per cent deposit might face stricter income verification or higher interest rate loadings compared to someone with 20 per cent down, even if their income and expenses are identical.
Debt-to-Income Limits That Apply From Early This Year
From February this year, lenders regulated by APRA can allocate no more than 20 per cent of new lending in each category to borrowers with a debt-to-income ratio of six times or more. That means if your total borrowing is six times your gross income or higher, you fall into a restricted pool. A household earning $120,000 with total borrowing of $720,000 or more sits at that threshold. The limit applies separately to owner-occupier and investor loans, and it doesn't affect existing borrowers, but it does mean some applicants who would have been approved under the old rules now get declined or offered a lower amount.
Bridging loans for owner-occupiers and loans for new builds are excluded from the DTI limit, which gives those buyers slightly more room. Non-bank lenders aren't subject to the DTI cap, so they remain an option for borrowers who exceed the threshold but still meet serviceability requirements.
Living Expenses and the HEM Benchmark
Lenders estimate your living expenses using either your actual declared expenses or a benchmark figure called the Household Expenditure Measure. The HEM is indexed to household size and income and is designed to reflect a modest standard of living. If your declared expenses fall below the HEM, most lenders will apply the higher HEM figure. If your actual expenses are above HEM, they'll generally use your declared amount, supported by recent bank statements.
A single borrower in New Lambton with no dependents might declare monthly living costs of $2,200, but if the HEM for that income bracket is $2,600, the lender uses $2,600. That extra $400 a month reduces borrowing capacity by around $80,000 to $100,000 depending on the loan term and interest rate. Some lenders apply HEM more strictly than others, and a few allow you to justify lower expenses with evidence, but most stick to the benchmark.
How Existing Debts Are Counted in the Calculation
Credit card limits are treated as debt even if the balance is zero. A card with a $10,000 limit reduces your borrowing capacity by around $50,000 to $60,000, because lenders assume you could draw down the full limit at any time. Personal loans, car loans and HECS debts all count as monthly commitments. HECS is calculated as a percentage of your income rather than a fixed repayment, typically around 1 per cent to 2 per cent depending on your salary.
If you're carrying multiple debts, paying them down or closing unused credit accounts before you apply can lift your capacity. Closing a $15,000 credit card limit you haven't used in two years might add $75,000 to $90,000 to your borrowing power, which can be the difference between qualifying for a property in New Lambton's median range or falling short. You can read more about how refinancing existing debts can improve your position before applying.
Why Two Lenders Give You Different Answers
Not all lenders assess income and expenses the same way. One lender might accept 80 per cent of overtime while another accepts 100 per cent. One might apply a higher HEM benchmark, while another gives you credit for lower actual spending. Investment property rental income is typically shaded by 20 per cent to account for vacancies and maintenance, but some lenders shade by 25 per cent. These differences compound, and the result is that two applicants with identical circumstances can receive offers that vary by $50,000 to $100,000 depending on which lender they approach.
That variation is why working with a broker who knows lender policy in detail makes a tangible difference. We regularly place applicants with lenders whose policy suits their income structure, rather than forcing them into a lender whose assessment method works against them.
The Role of Dependents and Childcare Costs
Lenders increase the HEM benchmark for each dependent child. A household with two children will have living expenses assessed at a higher level than a household with none, even if actual spending is similar. Some lenders allow you to offset declared childcare costs against income if those costs would cease once a child reaches school age, but that treatment isn't universal. The impact on borrowing capacity can be significant. A family with two young children might see their assessed living expenses increase by $1,200 to $1,500 a month compared to a couple without dependents, which can reduce capacity by $200,000 or more.
Rental Income and Investment Property Serviceability
If you already own an investment property and you're applying for an owner occupied home loan, lenders will include the rental income in your application but shade it to account for potential vacancies. Most lenders apply an 80 per cent shading, meaning $500 a week in rent is assessed as $400. They'll also include the full mortgage repayment on the investment loan as an ongoing commitment, assessed at the serviceability buffer rate, not the actual rate you're paying.
This treatment can create a serviceability shortfall even when the investment property is positively geared on paper. If the rental income after shading doesn't cover the stressed repayment, the gap comes off your borrowing capacity for the new loan.
Adjustments You Can Make Before You Apply
Paying down credit card balances and closing unused accounts is the most immediate lever. Consolidating short-term debts into a single personal loan with a defined end date can also help, because lenders treat a loan with 24 months remaining differently to a revolving credit facility with no end point. Increasing your deposit reduces the amount you need to borrow and can bring you under the LMI threshold or within a lender's maximum LVR band. If you're self-employed, lodging your most recent tax return before applying ensures the lender is working with current figures, and adding back non-cash deductions can lift your assessable income.
None of these changes increase your actual income, but they do improve how lenders view your application, and in a serviceability-constrained market that can mean the difference between approval and decline.
If you're weighing up what you can afford in New Lambton, we'll run your numbers through multiple lender policies and show you where you sit before you make any commitments. Call one of our team or book an appointment at a time that works for you using the link on this page.
Frequently Asked Questions
How much can I borrow for a home loan in New Lambton?
Lenders assess your borrowing capacity by applying your income against living expenses and debts, then stress-testing repayments at a rate roughly 3 percentage points above the actual loan rate. A couple earning $140,000 with minimal debts might borrow around $700,000 to $750,000, though the final amount depends on lender policy, your deposit size, and how they treat certain expenses.
What is the serviceability buffer and how does it affect my borrowing capacity?
The serviceability buffer requires lenders to assess your ability to repay at a rate 3 percentage points above the actual loan rate. If you're quoted a variable rate around 6%, the lender tests affordability at 9%. This buffer reduces your maximum borrowing limit and cannot be negotiated away.
Do credit card limits affect how much I can borrow?
Yes, credit card limits are treated as debt even with a zero balance. A $10,000 limit can reduce borrowing capacity by around $50,000 to $60,000 because lenders assume you could draw the full limit at any time. Closing unused cards before applying can significantly increase your borrowing power.
How do lenders assess self-employed income for borrowing capacity?
Lenders typically average your last two years of tax returns and may add back non-cash deductions like depreciation. If your most recent year shows lower income, some lenders weight it more heavily, reducing your capacity. Assessable income is based on what you've declared to the ATO, not what you've invoiced.
What is the debt-to-income limit that started in February this year?
From February this year, lenders regulated by APRA can allocate no more than 20 per cent of new lending to borrowers with a debt-to-income ratio of six times or more. If your total borrowing is six times your gross income or higher, you fall into a restricted pool and may face tighter approval conditions.
