Key Takeaway

Your debt-to-income (DTI) ratio compares your monthly debt repayments to your gross monthly income and is a critical factor Australian lenders use to assess whether you can afford a home loan. Most lenders prefer a DTI below 6 (meaning your total debt does not exceed six times your annual income), though serviceability tests also consider your living expenses. A lower DTI improves your approval chances and may unlock better rates, while a high DTI can lead to rejection or require a larger deposit.

Introduction

When you apply for a home loan in Australia, lenders assess your ability to service the debt, and your debt-to-income ratio is central to that evaluation. According to ASIC MoneySmart, lenders examine your income, existing debts, and living expenses to determine how much you can safely borrow (MoneySmart, 2026). The Australian Prudential Regulation Authority (APRA) has guided lenders to maintain prudent lending standards, which means DTI is now closely monitored (APRA, 2026). Understanding and managing your DTI before you apply can be the difference between approval and rejection.

This checklist walks you through the key steps to assess your current DTI, understand how lenders view it, and take practical action to improve your position.

Understanding Your Debt-to-Income Ratio

□ Calculate your gross monthly income. Add up all income sources: salary, rental income, investment returns, and any other regular income before tax. Use your most recent payslips or tax return to confirm the figures.

□ List all monthly debt repayments. Include credit card minimum payments, personal loans, car loans, student debts (such as HELP or HECS), and any other existing home loans or investment property loans. Do not include living expenses here, only debt obligations.

□ Divide total annual debt repayments by your gross annual income. For example, if your annual income is A$100,000 and your annual debt repayments total A$24,000, your DTI is 0.24 or 24 per cent. Many lenders also express this as a multiple: if your total debt is A$400,000 and your income is A$100,000, your DTI is 4.

□ Check if your DTI is below 6. APRA guidance has led most lenders to limit lending to borrowers with a DTI above 6, though some will lend higher with strong compensating factors such as a large deposit or high income.

How Australian Lenders Assess DTI

□ Recognise that DTI is one part of serviceability. Lenders combine your DTI with a detailed assessment of your living expenses (the Household Expenditure Measure or HEM benchmark, or your declared expenses if higher), and stress-test the loan at a higher interest rate (typically 3 percentage points above the actual rate as of mid-2026).

□ Understand the DTI threshold varies by lender. Major banks and many non-bank lenders apply the DTI limit of 6, but some specialist lenders or those targeting high-income borrowers may accept higher ratios if other factors are strong.

□ Know that DTI affects loan amount, not just approval. Even if you are approved, a high DTI may reduce the maximum loan amount the lender will offer, meaning you need a larger deposit to buy the property you want.

□ Factor in credit card limits, not just balances. Lenders assess the limit on your credit cards (often assuming you could draw the full amount), not just the current balance, so unused high-limit cards can hurt your DTI and serviceability.

Steps to Improve Your DTI Before Applying

□ Pay down or close high-limit credit cards. Reducing credit card limits or closing cards you do not use immediately improves your serviceability. Contact your card issuer to request a limit reduction or cancel the card entirely.

□ Consolidate debts if it lowers monthly repayments. Moving multiple small debts into one personal loan with a lower rate can reduce your monthly repayment total, though the overall debt remains. Check that consolidation fees do not outweigh the benefit.

Read also: The Impact of Rising Interest Rates on Mortgage Borrowing Capacity in Australia

□ Avoid taking on new debt in the months before applying. A new car loan, personal loan, or increased credit card limit will worsen your DTI and may delay your application. Wait until after settlement to make large purchases on credit.

□ Increase your income or reduce irregular income volatility. If you have a second job, rental income, or investment income, ensure you can document it clearly for at least the past 6 to 12 months. Lenders may discount variable income such as bonuses or commissions.

□ Make extra repayments on existing loans. Reducing the principal on a personal loan or car loan not only lowers your debt total but also demonstrates financial discipline to the lender.

What to Check Before Lodging Your Application

□ Request a pre-approval to confirm serviceability. A pre-approval (conditional approval) from a lender gives you a clear picture of how much you can borrow based on your current DTI and expenses. This step is critical before you make an offer on a property.

□ Review your credit report for accuracy. Obtain a free credit report from a credit bureau (Equifax, Experian, or illion) and check that all debts listed are correct and up to date. Dispute any errors immediately.

□ Gather 3 to 6 months of payslips and bank statements. Lenders will verify your income and review your spending patterns. Clean up your statements by reducing discretionary spending (gambling, frequent cash withdrawals, unexplained transfers) in the months before you apply.

□ Confirm all HELP or HECS debt is disclosed. Student debt (HELP, HECS) does not appear on your credit file but is reported by the Australian Taxation Office (ATO) and will be factored into your DTI. Declare it on your application.

□ Calculate the deposit and budget for lenders mortgage insurance (LMI). If your deposit is less than 20 per cent of the property value, you will likely pay LMI, which can be added to the loan (increasing your DTI) or paid upfront. Factor this into your budget.

□ Consider using a mortgage broker. A broker can assess your DTI across multiple lenders and recommend those more likely to approve your application based on your specific circumstances (Finder, 2026). Brokers often have access to lenders with more flexible DTI policies.

Conclusion

Your debt-to-income ratio is a decisive factor in Australian home loan approval, and taking control of it before you apply can save you months of delays and improve your borrowing power. Work through this checklist to assess where you stand, reduce high-limit debts, and gather the documentation lenders require. If your DTI is above 6 or your serviceability is tight, consult a licensed mortgage broker who can guide you to lenders with policies suited to your situation. As foundational texts such as Principles of Finance explain, managing your debt relative to income is a core principle of financial capacity and creditworthiness.

General Advice Warning

The information in this article is general in nature only and does not consider your personal objectives, financial situation, or needs. Home loan eligibility, interest rates, fees, DTI limits, and serviceability criteria vary by lender, product, and your individual circumstances. Lending is subject to credit assessment and approval. You should consider obtaining personal advice from a licensed mortgage broker or financial adviser before making any decisions. This article is not personalised financial, lending, or legal advice.