How Much Existing Debt Is Too Much?
Lenders assess existing liabilities by converting your credit limits and loan balances into monthly repayments using buffered interest rates to test your overall serviceability.
How do lenders assess liabilities?
When assessing existing debt, Australian lenders focus on your total commitments rather than just your day-to-day balances. For credit cards and buy-now-pay-later facilities, banks calculate a hypothetical monthly commitment based on the total approved limit—usually around 3% of the limit per month—even if the balance is regularly paid off in full.
For existing personal, vehicle, or home loans, lenders apply an interest rate buffer or floor rate—typically adding at least 3 percentage points to the actual rate. This stress-tests your household budget to ensure you can maintain repayments if economic conditions change, which directly impacts your overall borrowing capacity and serviceability calculation.
Other liabilities such as HECS/HELP student loans, ATO debt, and overdrafts are factored in using specific regulatory guidelines or compulsory repayment thresholds. Lenders also review your credit file to confirm your repayment history and check for undisclosed debts, ensuring a comprehensive picture of your financial obligations.
Because every Australian lender treats existing debt commitments differently, policy variations can significantly alter how much you are eligible to borrow. A Lonix broker can compare lenders across the marketplace, help you manage existing limits, and structure your loan application to present your serviceability in the strongest possible light.
Related questions
- How do credit card limits affect my borrowing capacity?
- Lenders calculate repayments based on your total credit card limit rather than your actual balance. Reducing or closing unused credit card limits can immediately boost your assessed borrowing capacity.
- Does HECS/HELP debt reduce how much I can borrow?
- Yes, HECS/HELP debt reduces your take-home pay through compulsory withholding thresholds, which lowers your net income in serviceability assessments. However, it does not attract commercial interest rates or count as traditional consumer debt.
- How far back do lenders check my debt repayment history?
- Lenders typically inspect your credit file and comprehensive credit reporting history for up to 24 months, alongside recent bank statements, to verify consistent, on-time repayments across all liabilities.
- Can I consolidate my existing debt into a new home loan?
- Yes, consolidating high-interest debts into a mortgage can lower your overall monthly commitments, provided you meet the lender's loan-to-value ratio (LVR) and serviceability requirements.