Borrowing Power Calculator

Borrowing Power in Australia — What You Need to Know

In Australia, lenders assess your borrowing power using a combination of your income, expenses, existing debts, and a buffer interest rate set above the loan rate. Since 2021, the Australian Prudential Regulation Authority (APRA) has required lenders to assess home loan applications at an interest rate at least 3% above the loan's actual rate. This serviceability buffer is designed to ensure borrowers can still afford repayments if interest rates rise.

This means that even if you are applying for a loan at 6%, the bank will test whether you could afford repayments at 9%. As a result, your actual borrowing power may be lower than you expect based on the headline rate alone.

Other Australian-specific factors that affect borrowing power include:

HECS-HELP debt If you have a student loan through the HECS-HELP scheme, lenders include your repayment obligations when assessing your borrowing capacity. Even though HECS repayments are made through the tax system, they reduce your net income and therefore your borrowing power.

See how your deposit affects your home loan options with our House Affordability Calculator.

Number of dependants Australian lenders apply living expense benchmarks such as the Household Expenditure Measure (HEM) when calculating what you can afford. The more dependants you have, the higher your estimated living costs, which reduces your borrowing power.

Credit card limits In Australia, lenders assess your full credit card limit — not just your outstanding balance — as a potential liability. Even if you pay your card off in full each month, a high credit limit can reduce how much you are able to borrow. Reducing or cancelling unused credit cards before applying can help.

Employment type Lenders treat different types of income differently. Full-time permanent employees typically have the strongest borrowing power. Casual workers, self-employed individuals, and contractors may need to provide additional documentation such as two years of tax returns to demonstrate stable income.

How to Increase Your Borrowing Power in Australia

If this calculator shows a lower borrowing amount than you were hoping for, there are several practical steps you can take to improve your position before applying for a home loan.

Reduce or cancel unused credit cards As mentioned above, lenders count your full credit card limit as a liability. Cancelling cards you do not use regularly can meaningfully increase your borrowing power without affecting your day-to-day finances.

Pay down existing debts Car loans, personal loans, and buy-now-pay-later accounts all reduce your borrowing capacity. Paying these off before applying for a mortgage can significantly improve your position.

Increase your deposit A larger deposit reduces the loan amount you need to borrow. It can also help you avoid Lenders Mortgage Insurance (LMI), which applies when your deposit is less than 20% of the property value.

Use our Stamp Duty Calculator to factor in upfront purchase costs.

Apply with a co-borrower Adding a partner or co-applicant to your loan application combines both incomes, which can substantially increase your joint borrowing power.

Reduce your living expenses In the months before applying, cutting back on non-essential spending can improve how lenders view your financial habits, particularly if they request bank statements as part of their assessment.

Consider a longer loan term Spreading repayments over 30 years rather than 25 reduces your monthly repayment amount, which can increase the total amount a lender is willing to offer. Keep in mind this also increases the total interest paid over the life of the loan.

Frequently asked questions

What is borrowing power?

Borrowing power is the maximum amount a lender may be willing to lend you based on your financial situation. It is calculated using your income, living expenses, existing debts, the interest rate on the loan, and the loan term. In Australia, lenders also apply a serviceability buffer of at least 3% above the actual loan rate, as required by APRA, to ensure you could still afford repayments if rates rise.

How accurate is this borrowing power calculator?

This calculator provides a reliable estimate based on the information you enter using standard lending formulas. However, actual borrowing amounts can vary between lenders depending on their individual credit policies, risk assessments, and internal benchmarks for living expenses. Use this as a starting guide, then speak with a mortgage broker or bank for a personalised figure.

What factors affect how much I can borrow?

Your borrowing power is influenced by your gross income, monthly living expenses, existing loan and credit card repayments, HECS-HELP debt, number of dependants, the interest rate on the new loan, and your chosen loan term. In Australia, lenders also consider your employment type — permanent full-time employees typically qualify for higher amounts than casual or self-employed applicants.

Does this calculator work worldwide?

Yes, this calculator is designed for global use. You can use it with different currencies, interest rates, and loan terms.

Why is my borrowing power lower than expected?

There are several common reasons your estimate may be lower than expected. Existing debts such as car loans, personal loans, or credit card limits all reduce your capacity. Higher living expenses, a larger number of dependants, or a shorter loan term will also lower the result. In Australia, HECS-HELP debt is another factor that many borrowers overlook. Try adjusting different inputs in the calculator to see what has the biggest impact on your result.

Can I increase my borrowing power?

Yes. The most effective ways to increase your borrowing power are to pay down or close existing debts, reduce or cancel unused credit cards, save a larger deposit, apply with a co-borrower, and reduce your monthly expenses. Choosing a longer loan term can also increase your borrowing estimate, though this comes at the cost of paying more interest overall.

Does this include lender fees and taxes?

No. This calculator estimates your maximum loan amount based on your income and expenses. It does not include additional costs such as stamp duty, Lenders Mortgage Insurance (LMI), application fees, or legal costs. Use our Stamp Duty Calculator to estimate stamp duty separately, and factor in LMI if your deposit is below 20% of the property value.

Use this calculator before applying for a loan to understand your limits and avoid over-borrowing.

Does this calculator work for Australian home loans?

Yes. While this calculator works globally, it is particularly useful for Australian borrowers. You can enter your income and expenses in Australian dollars, and adjust the interest rate to reflect current Australian home loan rates.

For the most accurate result, include all existing debts and use a rate that reflects current lender offerings.

What is the difference between borrowing power and affordability?

Borrowing power is the maximum amount a lender is willing to lend you. Affordability is how much you can comfortably repay without financial stress. These two figures are not always the same. Just because a lender offers you a certain amount does not mean you should borrow the full amount. Use our House Affordability Calculator alongside this tool to get a complete picture.

Know Your Limits Before You Start House Hunting

Understanding your borrowing power before you approach a lender puts you in a much stronger negotiating position. You will know which properties are realistically within reach, what deposit you need, and how different interest rates affect your maximum loan amount.

Use this calculator as your starting point, then explore our other free tools to build a complete picture of your home buying options.