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5 Key Factors That Influence Home Loan Interest Rates

Last Updated: March 1, 2024
5 Key Factors That Influence Home Loan Interest Rates

Part of the great Australian dream involves owning your home – but for most people to do this, it requires securing a home loan first.  We do recommend talking with a Sunshine Coast mortgage broker who can help you secure the best possible deal.

When you apply for a home loan, the interest rate is one of the most critical factors to consider. After all, the interest rate on your home loan can substantially impact your monthly mortgage payments and the overall cost of the property you want to buy.  

Subsequently, understanding the key factors that influence home loan interest rates is essential for anyone looking to buy a home. 

In this article, we will explore the five key factors that can affect the interest rates on home loans in Australia. Once you have a handle on them, you’ll be in a better position to secure an excellent deal.


Reserve Bank of Australia (RBA) Cash Rate


Overall, the Reserve Bank of Australia (RBA) is responsible for shaping the interest rates in Australia. It does this by setting the official cash rate, which serves as the benchmark for all interest rates in the Australian financial system. The cash rate is the interest rate at which banks and other financial institutions can borrow money overnight from the RBA. 

When the RBA decides to change the cash rate, it has a ripple effect on various interest rates, including home loan rates. Here’s how it works:

RBA Rate Cuts: If the RBA decides to cut the cash rate, it becomes cheaper for banks to borrow money. As a result, they often pass on these savings to consumers by lowering the interest rates on home loans. This encourages borrowing and stimulates economic activity, such as home buying and investing. 

RBA Rate Hikes: Conversely, if the RBA raises the cash rate, banks may increase the interest rates on their home loans to maintain their profit margins. Higher interest rates can deter borrowing and slow down economic activity. 

Borrowers should closely monitor RBA announcements, as they can signal potential changes in home loan interest rates. However, it’s important to note that not all lenders follow the RBA’s lead exactly, so competitive pressures and other factors can also influence individual bank rates. To find out how rate changes could affect your repayments, click here.


Economic Conditions


The state of the Australian economy directly impacts home loan interest rates. When setting interest rates, lenders assess economic factors such as inflation, unemployment rates, and GDP growth. Here’s how these factors influence home loan rates: 

Inflation: High inflation erodes the purchasing power of money over time. To counter the effects of inflation, lenders may raise interest rates. Likewise, lenders may offer more competitive rates to attract borrowers when inflation is low. 

Unemployment: A high unemployment rate can lead to lower consumer spending and weaker economic growth. In such conditions, lenders may be more conservative and keep interest rates stable or even raise them. 

GDP Growth: Strong economic growth can lead to increased demand for loans, including home loans. In response, lenders may raise rates to manage the demand and prevent the economy from overheating. 

Ultimately, the economy’s overall health is one of the most crucial factors in determining home loan interest rates. Therefore, it pays for borrowers to stay informed about economic trends and thus make more informed decisions about their home loans.


Competition Among Lenders


Competition among financial institutions is another significant factor affecting home loan interest rates.

In Australia, numerous banks, credit unions, and non-bank lenders are vying for borrowers’ business. This competition can lead to more attractive interest rates for consumers. 

When lenders compete for customers, they often offer promotional interest rates, reduced fees, or other incentives to attract borrowers. This can work to the advantage of homebuyers, as it provides opportunities to secure a better deal. However, it’s essential for borrowers to compare offers from various lenders to find the most competitive interest rates and loan terms out there. 

Online tools and mortgage brokers can help streamline the process of comparing lenders and their offers, making it easier for borrowers to find a suitable home loan with favourable terms.


Loan-to-Value Ratio (LVR)


The loan-to-value ratio (LVR) is another influential factor that lenders consider when determining home loan interest rates. LVR is the ratio of the loan amount to the appraised value of the property. For example, if you want to buy a $400,000 home and are borrowing $320,000, your LVR would be 80%. 

Lenders generally categorise loans into different LVR bands, and their interest rates can vary significantly based on these bands. Here’s how LVR impacts interest rates: 

Low LVR: When borrowers have a low LVR (typically 80% or less), meaning they have a substantial deposit or equity in the property, lenders view them as lower risk. As a result, borrowers with low LVRs may qualify for lower interest rates. 

High LVR: Borrowers with a high LVR (typically above 80%) are seen as riskier, as they have less equity in the property. These borrowers may be charged higher interest rates or required to pay for lenders mortgage insurance (LMI) to protect the lender in case of default. 

To secure more favourable interest rates, borrowers can aim for a lower LVR by making a larger down payment or increasing their equity in the property over time.


Borrower’s Creditworthiness


A borrower’s creditworthiness is also important when it comes to the interest rate they are offered on a home loan.

Lenders assess a borrower’s creditworthiness by looking at their credit history, credit score, income, employment stability, and debt-to-income ratio. Here’s how these factors influence interest rates: 

Credit History and Score: A strong credit history and high credit score indicate responsible financial behaviour. Borrowers with excellent credit histories and scores are more likely to qualify for lower interest rates. 

Income and Employment Stability: Lenders prefer borrowers with stable employment and a steady source of income. Consistent income provides assurance that the borrower can meet their loan obligations, potentially leading to lower interest rates. 

Debt-to-income Ratio: A high debt-to-income ratio can indicate that a borrower is overleveraged. Therefore, lenders may offer higher interest rates to borrowers with a high debt load to compensate for the increased risk. 

It’s vital for potential homebuyers to maintain a healthy credit profile and financial stability to enhance their chances of securing competitive interest rates. Regularly checking and improving your credit score and paying down existing debts can help in this regard.




When it comes to securing home financing, knowledge is power, and understanding the five key factors that influence home loan interest rates can empower you to make the best financial decisions for your homeownership journey.

As mentioned, the Reserve Bank’s cash rate, economic conditions, competition among lenders, loan-to-value ratio (LVR), and your own creditworthiness all play integral roles in determining the interest rate you’ll be offered on your home loan. 

If you are about to embark on your path to homeownership or seeking to refinance an existing mortgage, remember that these factors are not static. Economic conditions change, competition among lenders evolves, and your own financial circumstances may improve over time. Subsequently, by staying informed, maintaining a strong financial profile, and shopping around for the best deals, you can position yourself to secure a home loan with favourable interest rates. Utilising the services of a mortgage broker can help, too.

Ultimately, the journey towards homeownership is significant, and the interest rate on your home loan is a critical component of that journey. But with careful consideration of these key factors and prudent financial planning, you can confidently navigate the complex world of home loan interest rates, ensuring that your investment in your dream home remains a place of comfort and a sound financial decision for years to come.