What does debt-to-income ratio mean
Your debt-to-income ratio, or DTI, is the percentage of your gross monthly income that goes toward paying your regular debts. Gross income means your total earnings before tax and other deductions are taken out. Lenders use this figure to measure how comfortably you could manage a new loan repayment on top of your existing commitments.
It is a snapshot of your financial breathing room. If you earn $6,000 a month before tax and your monthly debt payments add up to $1,800, your DTI is 30 percent. That number tells a lender you already spend nearly a third of your pre-tax income on debt, before any living expenses like groceries, utilities or rent are considered.
A lower DTI tells a lender you have more income available to absorb a new mortgage or personal loan repayment. A higher DTI shows your finances are already stretched, which can make approval harder regardless of your credit score.
How is debt-to-income ratio calculated
Total monthly debt payments ÷ gross monthly income × 100. Gross income is your pay before tax, not the amount that lands in your bank account.
Start by adding up every regular debt repayment you make in a month. Then work out your gross monthly income. If you are paid fortnightly, multiply one fortnight's gross pay by 26 and divide by 12 to get the monthly figure. Divide the debt total by the income total and multiply by 100.
- Monthly rent on a Sydney flat: $2,400
- Car loan repayment: $520
- Credit card minimum payment: $150
- Personal loan for a renovation: $380
- Total monthly debt payments: $3,450
Gross annual salary of $95,000 works out to $7,917 gross per month. Dividing $3,450 by $7,917 gives 0.436, which is a DTI of 44 percent. Lenders look at the ratio before and after the new loan you are applying for, so they will add the proposed mortgage repayment to your existing debts for the final figure.
What debts are included in DTI
Lenders count recurring debt obligations, not every bill you pay. Debts with a fixed repayment schedule go into a DTI calculation, such as home loans, car loans and personal loans. Credit cards are included as well, but the lender uses the total card limit rather than the balance you carry each month.
Lenders do not count everyday living expenses and variable bills as debt. Your rent, utility bills, private health insurance, groceries and mobile phone plan stay out of the ratio. Australian lenders do not include HECS-HELP debt in DTI calculations because the repayment amount adjusts with your income through the tax system rather than being a fixed monthly commitment.
Lenders count:
- Home loan repayments, including investment property loans
- Car loan and personal loan repayments
- Credit card limits, not the current balance
- Buy now pay later account limits, treated the same way as credit cards
- Existing personal overdraft limits
- HECS-HELP debt, excluded because repayments are income-contingent
What DTI do Australian lenders look for
Most Australian banks prefer a debt-to-income ratio below 6 times your gross annual income. The Australian Prudential Regulation Authority (APRA) does not set a fixed DTI cap. Instead APRA expects lenders to have their own internal limits and to scrutinise applications with a DTI of 6 or above more closely. A loan with a ratio over 6 is not automatically refused, but the bank must apply extra checks before approval.
A lower DTI shows the lender you have breathing room in your budget. A ratio under 4 is considered comfortable by many credit assessors. Between 4 and 6, approval is common for borrowers with stable employment, a good credit history and a reasonable deposit. Above 6, the lender will typically look harder at your living expenses, the size of your deposit and whether you could still manage the repayments if interest rates rose by 3 percentage points, which is the standard serviceability buffer APRA requires.
Non-bank lenders sometimes accept a DTI higher than 6, but their interest rates tend to be higher to offset the extra risk. A lower ratio also gives you more negotiating power because the lender sees you as a safer borrower. Keeping your DTI down before you apply can widen your choice of lenders and improve the rate you are offered.
How to lower your debt-to-income ratio before applying
You improve your DTI by reducing the debts that count in the calculation or increasing the income that sits under them. Most people find a combination works best, and even small changes made a couple of months ahead can shift the percentage enough to meet a lender’s benchmark.
The figures lenders use come from your latest statements and credit report, not from a future promise. Paying down a card today helps, but waiting for the next statement cycle to show the lower balance is what actually changes the number they see.
- Pay off the smallest credit card or personal loan completely and close the account. A zero balance still counts as available credit, but a closed account removes that debt from the calculation altogether.
- Consolidate several high-interest debts into one personal loan with a lower monthly repayment, which shrinks the total monthly obligation side of the ratio.
- Pause any new buy now pay later purchases for at least three months and pay down existing BNPL balances so fewer instalments appear on your statements.
- Increase your gross income with overtime, a second job or rental income from a spare room, then gather at least two months of payslips or bank records to prove the higher figure is stable.
- Reduce credit card limits across all cards, even those with no balance, because some lenders assess a percentage of the total limit as a theoretical monthly commitment.
Does a high DTI mean automatic rejection
A high debt-to-income ratio does not always lead to an automatic rejection, but it will narrow the pool of lenders willing to consider your application. Many Australian lenders set a hard cap on DTI, often around six to seven times your gross income, and any figure above that threshold is declined outright regardless of other strengths in the file. Below the cap, a higher DTI still raises the risk rating the lender assigns, which can mean a higher interest rate or a request for a larger deposit.
Other parts of your financial picture can offset a moderately high DTI. A strong credit history, stable employment in a secure industry and a deposit of twenty per cent or more all work in your favour. Lenders also look at your actual living expenses against the Household Expenditure Measure benchmark, so a frugal spending pattern can help balance a higher debt load. If your income is likely to rise, such as a medical registrar approaching full qualification, some lenders will apply a future income model that gives you more room.
The key point is that a high DTI does not mean every door is closed. It means you are more likely to need a broker who knows which lenders apply a strict cutoff and which ones take a broader view of your circumstances.
Frequently asked questions
Is rent counted in debt-to-income ratio
No. Rent is a living expense, not a debt, so it is not included in the standard DTI calculation. Lenders do consider your overall living costs separately when they assess your borrowing capacity.
Does a HECS-HELP debt affect my DTI
Yes. Lenders treat compulsory HECS-HELP repayments as a debt obligation. They calculate the annual repayment based on your income and divide it by 12 to get a monthly figure that goes into your DTI.
Can I get a home loan with a DTI over six
It is harder but not impossible. Some non-bank lenders may consider applications with a higher DTI, especially if you have a large deposit, a strong credit history or stable employment. You will likely pay a higher interest rate.
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