Top tips to pass serviceability for a home loan

Your lender needs to know you can afford the loan, even if rates climb.

Serviceability assessment is how lenders decide whether you can manage repayments over the life of the loan, not just at today's interest rate. They add a buffer to the current rate, adjust your income for tax and commitments, and calculate whether you still have enough left over to meet the monthly repayment. If the numbers don't stack up, you'll either need to borrow less or strengthen your financial position before applying.

How Lenders Calculate What You Can Afford

Lenders assess your borrowing capacity by comparing your income to your expenses, then testing the result against a hypothetical rate that's higher than what you'll actually pay. Most lenders add a buffer of around 3% on top of the loan's interest rate, so if the variable rate is 6.2%, they'll assess your ability to repay at around 9.2%. This buffer accounts for possible rate rises over the life of the loan. Your gross income is adjusted for tax using the Australian Taxation Office's PAYG tables, and lenders deduct all recurring expenses including rent, credit cards, personal loans, childcare, and an allowance for general living costs. What's left over needs to cover the buffered repayment with some breathing room.

Consider a couple in Canning Vale applying for an owner occupied home loan. One earns $85,000 as a full-time warehouse supervisor, the other earns $62,000 in administration. They have a $12,000 car loan with 18 months remaining and a credit card with a $6,000 limit that they rarely use. The lender will assess the car loan at its actual repayment but treat the credit card as though it's fully drawn, adding around $180 per month to their commitments based on a 3% minimum repayment. Combined with an estimate for groceries, transport, insurance and utilities for a household of two adults and one child, their net surplus income might support a loan of $550,000 to $600,000 depending on the lender's policy. If they increase the credit card limit or take on another personal commitment before applying, that range drops.

Why Your Credit Card Limit Matters More Than Your Balance

Lenders assess your credit card at its full limit, not the amount you owe. A card with a $15,000 limit is treated as though you've drawn the entire amount and must make the minimum repayment each month, even if the actual balance is zero. Closing cards you don't need or reducing limits before you apply can lift your borrowing capacity by tens of thousands of dollars. If you're serious about maximising your approval amount, deal with your cards at least a month before lodging the application so the change appears on your credit file.

Income Types That Strengthen Your Application

Permanent employees with consistent PAYG income are the easiest to assess. Lenders use your base salary, and many will include overtime, allowances or bonuses if you can show at least three to six months of payslips proving the income is regular. Self-employed applicants need two years of tax returns, and lenders typically average your net profit after deducting business expenses and adding back depreciation. If your most recent year shows a dip in income, some lenders will use the lower figure, which can reduce what you're approved to borrow. Casual workers are assessed on a case-by-case basis, and most lenders require at least six to twelve months of continuous employment with the same employer, using an average of your earnings over that period. If you've recently moved from casual to permanent employment, update your payslips and contract before applying, as permanent status generally allows a higher assessed income.

Living Expense Benchmarks and the HEM

Most lenders use the Household Expenditure Measure, a benchmark developed by the Australian Bureau of Statistics and applied across the industry, to estimate your basic living costs. The HEM varies by household size, income level and postcode. If your declared expenses fall well below the HEM, the lender will use the HEM figure instead. You can't improve serviceability by underreporting your actual spending if it's genuinely higher than the benchmark, but you also won't be penalised for living modestly if your real expenses are lower. Lenders overlay the HEM with your actual committed expenses such as rent, school fees, childcare and other loans, so reducing discretionary spending in the months before you apply won't directly change the outcome unless it results in paying down debt or closing a credit facility.

How the Buffer Rate Protects You and the Lender

The buffer rate is set by the Australian Prudential Regulation Authority and exists to ensure you can still afford repayments if interest rates rise. It also acts as a safety margin in case your income drops or expenses increase. The buffer doesn't change the rate you'll pay on the loan, it only affects the approval calculation. Some lenders apply a floor rate, meaning they'll assess at a minimum rate regardless of how low the actual product rate falls. In our experience, borrowers who are marginal at assessment often struggle when rates do move, so passing comfortably at the buffered rate is a useful reality check, not just a regulatory hurdle.

Canning Vale Property Types and Deposit Requirements

Canning Vale includes a mix of established houses, newer estates south of Nicholson Road, and townhouses near Livingston Marketplace. Lenders don't typically change the serviceability calculation based on property type, but they do adjust the loan to value ratio and sometimes apply postcode overlays if they consider an area higher risk. Canning Vale postcodes generally don't attract lender restrictions, and most applicants can borrow up to 95% of the property value if they meet serviceability and are willing to pay Lenders Mortgage Insurance. A 10% to 20% deposit improves your position by lowering the LMI premium and sometimes unlocking rate discounts. If you're using the Australian Government 5% Deposit Scheme, the lender still assesses serviceability in the same way, but the guarantee from Housing Australia replaces the LMI cost, which can free up cash for other settlement expenses.

Debt Consolidation and Timing Your Application

Paying off a car loan or personal debt before applying can meaningfully increase how much you're approved to borrow. If you're three months away from clearing a commitment, consider whether waiting and applying with a clean slate makes more sense than applying now with reduced capacity. The same applies to new debt. Taking out a car loan or increasing a credit limit in the months before you lodge a home loan application can push you below the serviceability threshold, even if the debt itself is manageable. Lenders pull a fresh credit report at lodgement and again before settlement, so changes made after pre-approval can affect final approval if they alter your financial position.

What Happens If You Don't Meet Serviceability

If your application is declined or approved for less than you need, you have three options. You can borrow less and adjust your property search accordingly. You can improve your financial position by paying down debt, increasing your deposit, or adding a co-borrower with additional income. Or you can wait until your income increases or your commitments reduce. Reapplying with the same financial position rarely changes the outcome unless you approach a different lender with a more flexible policy, and even then, the buffer and HEM apply across the industry. We regularly see applicants strengthen their position in six to twelve months by following a clear plan, and a loan health check or borrowing capacity assessment early in the process can show you exactly where you sit and what needs to change.

Call one of our team or book an appointment at a time that works for you. We'll assess your income and commitments against current lender policies, show you what you're likely to be approved for, and outline the specific steps that will strengthen your application if you're not quite there yet.

Frequently Asked Questions