First Mortgage Australia 2026: What to Know Before You Borrow

A first mortgage is a loan secured against a property, giving the lender the primary claim to the property if the borrower defaults. This means that if you can’t meet your repayments and the property is sold, the first mortgage lender is paid back before any other creditors. Because of this priority, first mortgages generally come with lower interest rates and more favourable terms than second or subsequent mortgages.

Key Features of a First Mortgage

• Primary security: The lender has the first right to the property if repayments are not made.
• Lower rates: First mortgages typically attract lower interest rates compared to other secured loans.
• Standard for home buyers: Most owner-occupiers and residential property buyers use a first mortgage to finance their purchase.

For example, if you buy a home with a deposit and borrow the remainder from a bank or lender, that loan is your first mortgage. If you later take out another loan secured against the same property, that would be considered a second mortgage, which is subordinate to the first.

Australian mortgage lending continues to adapt to changing economic conditions and policy updates. Here are some of the key developments affecting first mortgages in 2026:

• Serviceability buffer changes: The minimum serviceability buffer—the extra interest rate lenders use to assess your ability to repay—has been adjusted, making it slightly easier for some buyers to qualify for a loan.
• Interest rate outlook: The Reserve Bank of Australia has signalled that interest rates may change during the year, which could affect both variable and fixed mortgage rates.
• Government support schemes: Some government initiatives, such as schemes allowing eligible buyers to purchase with a smaller deposit and without Lenders Mortgage Insurance (LMI), have been expanded. Eligibility criteria still apply.
• Closer scrutiny of expenses: Lenders continue to closely examine applicants’ living expenses and existing debts, reflecting ongoing cost-of-living pressures.

These changes mean that while some aspects of getting a first mortgage may be more accessible, lenders are still careful in their assessments. It’s important to stay up to date with current requirements and policies when planning your application.

If you’re preparing to apply for your first mortgage, here are some practical steps to help you improve your chances of approval and secure a loan that suits your needs:

1. Understand Your Borrowing Power

Use online calculators to estimate how much you may be able to borrow, taking into account the latest lending rules and any government schemes you may be eligible for. Remember that your borrowing power depends on your income, expenses, deposit size, and existing debts.

2. Reduce Secondary Debts

Lenders look closely at your existing debts, including credit cards and buy-now-pay-later accounts. Paying down or closing unnecessary debts before you apply can improve your application.

3. Decide Between Fixed and Variable Rates

With potential changes in interest rates on the horizon, consider whether a fixed or variable rate suits your circumstances. Fixed rates offer repayment certainty, while variable rates may provide flexibility if rates fall.

4. Check Your Eligibility for Support Schemes

If you’re a first-time buyer, investigate whether you qualify for government schemes that can help with your deposit or reduce upfront costs. State and territory governments may also offer stamp duty concessions or grants for eligible buyers.

5. Prepare Your Documentation

Lenders require detailed documentation to assess your application. Be ready to provide evidence of your income, employment, living expenses, and any financial commitments. Having your paperwork organised can speed up the approval process.

6. Consider the Property Type

The type of property you buy—such as a house, apartment, or off-the-plan purchase—can affect your loan terms and approval chances. Some properties may have additional lending restrictions or require higher deposits.

While first mortgages are the most common and generally lowest-risk way to finance property, it’s important to be aware of potential pitfalls:

• Default risk: If you can’t meet your repayments, the lender can repossess and sell your property. Always budget for possible interest rate rises and unexpected expenses.
• Break costs: Fixed-rate loans may include penalties if you repay the loan early or refinance before the end of the fixed period. Review your loan agreement for details.
• Refinancing: As market conditions change, refinancing your first mortgage can help you access better rates or tap into your home equity. However, refinancing may involve fees and a new credit assessment.

Regularly reviewing your mortgage—even if you’re already locked into a loan—can help ensure you’re getting the best deal available as new lenders and products enter the market.

What is the difference between a first and second mortgage?

A first mortgage is the primary loan secured against a property, giving the lender first claim if the borrower defaults. A second mortgage is an additional loan secured against the same property but is paid out only after the first mortgage in the event of a sale.

Can I get a first mortgage with a small deposit?

Some government schemes allow eligible buyers to secure a first mortgage with a smaller deposit, sometimes as low as 5%. However, eligibility criteria and lender requirements apply.

How do interest rate changes affect my first mortgage?

If you have a variable rate loan, your repayments may increase or decrease as interest rates change. Fixed rate loans offer stable repayments for a set period, but may include break costs if you refinance early.

What documents do I need to apply for a first mortgage?

You’ll generally need to provide proof of identity, income (such as payslips or tax returns), details of your expenses, and information about any existing debts or assets.

Securing a first mortgage is a significant financial commitment, but understanding the basics and staying informed about current lending rules can help you make confident decisions. Take the time to assess your finances, research your options, and prepare your documentation before applying. With careful planning, you can navigate the 2026 mortgage landscape and move closer to your property goals.