How Mortgage Interest Rates Impact Your Home Loan
When it comes to home loans, one factor stands out as a game-changer: mortgage interest rates. These rates determine how much your loan will cost over time and can influence everything from your monthly repayments to your financial plans for the future.
If you’re curious about how mortgage interest rates impact your home loan, read this article so you can make informed decisions.
What Are Mortgage Interest Rates?
Mortgage interest rates are the cost of borrowing money from a lender to buy a home. These rates are influenced by the Reserve Bank of Australia (RBA), which sets the official cash rate. This is probably why some people call them RBA interest rates, which is inaccurate. When the RBA raises or lowers this cash rate, lenders typically follow suit, adjusting their interest rates accordingly. This just shows that the cash rate influences but not directly dictates lenders’ rates. The current interest rate Australia has is the rate that the RBA has been trying to keep steady for a year, which is 4.35% (at time of publishing)
Now, there are two main types of mortgage interest rates:
- Fixed Rates – These rates remain unchanged for a set period, offering stability in your repayments.
- Variable Rates – These rates fluctuate depending on market conditions, which means your repayments can go up or down.
If you don’t know which of these two is ideal, know that some borrowers choose one or the other depending on their situation, and others choose a split loan. It’s a loan that combines the stability of fixed rates with the flexibility of variable rates.
Major Impacts of Interest Rates on Your Home Loan
- Monthly Repayments
Interest rates have a direct impact on your monthly mortgage repayments. When rates go up, so do your repayments and vice versa. A 1% increase in interest rates could add hundreds of dollars to your monthly payments and this can significantly affect your budget, particularly for a variable-rate loan. - Borrowing Power
The interest rate also determines how much you can borrow. When interest rates are low, borrowers may qualify for larger loan amounts as repayments become more affordable. However, lenders assess borrowing power based on a higher “stress-tested” rate to ensure affordability if rates rise. Conversely, high rates reduce your borrowing capacity, which can limit your options when purchasing a property. - Fixed vs. Variable Rates
Fixed rates provide stability but can be higher than variable rates when you sign the loan. Variable rates fluctuate with the market and may save money when rates are low, but they also come with unpredictability. Some lenders offer discounted or introductory variable rates, which can be beneficial in the short term. - Refinancing Opportunities
Changes in interest rates can create opportunities to refinance your loan. For instance, if you’re on a higher rate, refinancing to a lower rate could save you thousands over the life of the loan. Weigh the costs, such as break fees or application fees, before refinancing.
Broader Implications of Interest Rate Changes
Housing Market Trends
Interest rates play a significant role in the housing market. Low rates often lead to higher demand for properties, driving up prices. High rates can cool the market, making it more favourable for buyers but tougher for sellers.
Economic Stability
The RBA adjusts interest rates to manage inflation and maintain economic stability. For borrowers, understanding these changes can help you anticipate their impact on your home loan and the broader economy.
Rental Market Impact
When interest rates rise, some landlords may pass on the increased costs to tenants by raising rents. This can make renting more expensive, impacting both renters and prospective homebuyers.
Practical Tips for Managing Interest Rate Impacts

Evaluate Loan Options Regularly
Don’t just set and forget your home loan. Regularly compare rates and consider refinancing to ensure you’re getting the right deal for you. Even a small reduction in your rate can lead to significant savings.
Build a Financial Buffer
Set aside extra funds to cushion the impact of potential rate hikes. A good rule of thumb is to have three to six months’ worth of expenses saved.
Consider Fixed vs. Variable Loans Wisely
Assess your financial goals and risk tolerance when choosing between fixed and variable rates. If stability is your priority, a fixed-rate loan might be the better choice.
Utilise Offset or Redraw Facilities
Maximise the benefits of offset accounts or redraw facilities to reduce your loan’s interest costs. These tools can make a big difference, especially during periods of high rates.
Find the Right Mortgage Interest Rates for You with North Brisbane Home Loans
Mortgage interest rates impact every aspect of your home loan – from monthly repayments to long-term financial goals. By understanding how rates work and staying proactive, you can make informed decisions that protect your financial future.
Whether it’s evaluating loan options, building a financial buffer or leveraging offset accounts, North Brisbane Home Loans is here to assist. Contact us today, and we’ll help you with your home loan needs and answer your home loan questions.

Patrick Cranshaw, a Certified Mortgage Professional for over 21 years, founded North Brisbane Home Loans in 2002. His career began with ANZ Bank in New Zealand, where he progressed over 16 years to a Business Banking role in Virginia. After moving to Brisbane in 2000, Patrick led the QLD market for a home loan agency, helped set up the REMAX Real Estate Finance division, and practiced as a broker.