Do you know what affects your borrowing capacity?

Your borrowing capacity determines how much a lender will approve for your home loan.

That figure isn't based on what you think you can afford or what the property costs. Lenders calculate it using a detailed assessment of your income, your existing debts, your living expenses, and a margin they build in to ensure you can still meet repayments if interest rates rise. The gap between what you assume you can borrow and what a lender will actually approve can be significant, particularly if you're looking at properties in Hampton East where the median price reflects the area's proximity to the bay and established character.

How Lenders Calculate What You Can Borrow

Lenders use a debt serviceability assessment to determine your borrowing capacity. This calculation takes your net income, subtracts your living expenses and any existing debt commitments, and applies a buffer to stress test your ability to repay at a higher interest rate. Most lenders add a buffer of around 3%, so even if the variable rate is lower, they assess your repayments as though the rate were higher. This buffer protects both you and the lender if rates rise.

Consider a household in Hampton East with a combined gross income of $150,000 per year. After tax, that might leave around $110,000 annually. If they have a car loan with monthly repayments of $600, childcare costs, and typical living expenses for a family of four, the lender will deduct these commitments before calculating how much they can service. With the buffer applied, that same household might find their borrowing capacity sits around $650,000 to $700,000, depending on the lender's expense methodology. That's enough to enter the market in some parts of Bayside, but may require careful consideration of property type or location within Hampton East itself.

Income Types and How They're Treated

Lenders assess different income types differently. Permanent salary and wage income receives full weighting, but other income streams are treated more conservatively. If you're self-employed or working as a contractor, most lenders will average your income over the past two financial years and may reduce it by a percentage to account for variability. Bonuses and overtime are typically calculated at 80% or require a sustained track record. Rental income from an investment property is usually assessed at 80% to account for vacancy and maintenance.

If you're applying for a home loan with mixed income sources, understanding how each component is weighted helps you prepare accurate documentation and set realistic expectations before you begin the application process.

Existing Debts and How They Reduce Your Capacity

Every debt commitment you carry reduces your borrowing capacity. Lenders don't just look at what you owe, they assess the ongoing repayment obligation. A credit card with a $10,000 limit might have a zero balance, but lenders will still factor in the potential repayment as though you'd drawn the full limit. That single card could reduce your borrowing capacity by $30,000 to $50,000 depending on the lender's calculation method.

Personal loans, car loans, Buy Now Pay Later accounts, and HELP or HECS debts all reduce what you can borrow. In our experience, buyers often underestimate the impact of these smaller commitments. Paying off a $5,000 personal loan or closing unused credit cards before you apply for a home loan can genuinely improve your borrowing capacity and bring a property within reach.

Living Expenses and the HEM Benchmark

Lenders use one of two methods to assess your living expenses: they either rely on the Household Expenditure Measure (HEM), a benchmark figure based on household size and income, or they calculate your actual declared expenses. The HEM is a standardised figure maintained by the Melbourne Institute and is intended to reflect basic living costs for Australian households. For a family of four in a higher income bracket, the HEM might sit around $3,500 to $4,000 per month.

If your actual expenses are lower than the HEM, the lender will typically still use the HEM figure. If your actual expenses are higher, the lender will use your declared amount. This creates a floor below which your living costs cannot be assessed, regardless of how frugally you live. For buyers in areas like Hampton East, where private school fees, extracurricular activities, and higher living costs are common, declared expenses often exceed the HEM and further reduce borrowing capacity.

How Interest Rate Buffers Affect Your Approval

The buffer lenders apply when stress testing your repayments has a direct impact on how much you can borrow. Even if the current variable rate on an owner occupied home loan sits around a certain level, lenders will assess your ability to repay at a rate 3% higher. This is a regulatory expectation designed to ensure you can still meet repayments if rates rise.

That buffer compresses your borrowing capacity. A household that could comfortably service a $750,000 loan at current rates might only be approved for $650,000 once the buffer is applied. The buffer is non-negotiable and applies across all lenders, though some lenders use slightly different buffers or apply them differently depending on loan features.

Loan to Value Ratio and Its Influence on Approval

Your deposit size affects not just whether you need to pay Lenders Mortgage Insurance, but also how your borrowing capacity is assessed. A higher deposit reduces the loan to value ratio, which reflects the proportion of the property value you're borrowing. A lower LVR is seen as lower risk, and some lenders will approve higher loan amounts or offer better interest rate discounts when your LVR is below 80%.

If you're purchasing in Hampton East with a 10% deposit, you'll need to factor in LMI, and your borrowing capacity may be slightly reduced depending on the lender's risk settings. Conversely, a 20% deposit removes LMI, reduces your loan amount, and may increase your borrowing capacity if the lender applies less conservative serviceability settings for lower-risk borrowers.

Strategies to Improve Borrowing Capacity Before You Apply

Reducing your debt commitments before you apply is one of the most effective ways to improve your borrowing capacity. Pay off small personal loans, close credit cards you don't use, and reduce limits on any cards you plan to keep. Each reduction increases the amount a lender will approve.

If you're self-employed, ensure your tax returns are up to date and consider speaking with a mortgage broker before lodging your next return. Maximising deductions can reduce your tax liability, but it also reduces your declared income, which directly affects your borrowing capacity. Balancing tax strategy with borrowing capacity is particularly important if you're planning to apply for a home loan within the next 12 months.

Increasing your deposit also improves your position. A larger deposit lowers your LVR, may remove the need for LMI, and can unlock access to home loan products with lower rates or more flexible features like an offset account.

Why Pre-Approval Helps You Understand Your Position

Home loan pre-approval gives you a clear picture of what you can borrow before you start looking at properties. It's not a guarantee, but it's based on a full assessment of your income, debts, and expenses, and it's valid for three to six months depending on the lender. For buyers in Hampton East, where properties can move quickly and competition is often strong, knowing your borrowing capacity in advance helps you focus on properties within your range and move confidently when the right one comes up.

Pre-approval also highlights any issues with your application early, giving you time to address them before you make an offer. If a lender identifies a debt that's reducing your capacity or an income document that's missing, you can resolve it without the pressure of an unconditional contract.

Call one of our team or book an appointment at a time that works for you to discuss your borrowing capacity and explore the home loan options available to you in Hampton East.

Frequently Asked Questions