The Drawbacks of Interest-Only Home Loans

An interest-only home loan leads to lower monthly payments. That’s only a short-term view, though. You’ll still have to handle the principal sum at some point. Know what you’re stepping into or an interest-only loan could come back to bite you.

Is Saving Money Now Worth Losing Money in the Future?

You have several options available to you when you start looking at home loan products. Beyond choosing between variable and fixed rates loans, you also need to look at the type of repayments. Most lenders offer the option between principal and interest (P&I) and interest-only loans.
Making interest-only payments on a home loan lowers your monthly outgoings considerably. Let’s say you have a home loan of $320,000 at 6% interest. With the interest-only option, you pay just under $370 per week. Adding a principal payment on top can up that weekly figure by over $100. That makes interest-only payments sound good at first. However, these loans can cause issues later on. Here we will look at five of the major drawbacks of interest-only home loans.

Drawback #1 – The Principal

Your home loan has a principal sum. This is usually between 80% and 100% of the value of your property. As you pay off the principal, the amount of interest you pay alongside it decreases. This does not happen with an interest-only loan. Instead, all you pay is interest, which fluctuates depending on current rates. You also don’t pay any of the principal. Once the loan ends, you are still left with the full principal to pay off, despite having spent thousands of dollars on the loan.

Drawback #2 – No Equity

Failing to pay any of the principal also means you have no equity in your home unless the market price of the house increases. In essence, the lender owns just as much of the home at the end of the loan as they did at the beginning. Having no equity restricts how you borrow against the property. For example, consider your situation if you enter maternity leave. If you have no savings, you could have relied on the equity you’d built in your home to make payments. With an interest-only loan, you don’t have access to such options. This means you limit the home loan products you can apply for.

Drawback #3 – Depreciation

It is possible for your property to decrease in value during the course of your loan. The term for this is depreciation. Depreciation can come back to haunt you once an interest-only loan ends. You may find that your home is now worth less than it was when you took out the loan. This means that selling the property will no longer cover the principal. As such, you may have to sell your home and then raise more money to pay the difference.

Drawback #4 – The False Sense of Security

The lower payments of an interest-only loan could lull you into a false sense of security. You may think you have more money to spend. In reality, the money you save in weekly payments should go aside for the costs you will face later. Unfortunately, some borrowers don’t save properly. This could leave them unable to repay the home loan’s principal once the interest-only period ends. A drastic fall in living standards often follows, sometimes requiring you to sell your house.

Drawback #5 – No Fixed Rate

Let’s say you see an interest-only home loan as a short-term solution. This is generally the case for owner-occupiers. You may feel you can take advantage of the lower payments for a while before switching to a loan that allows you to pay the principal. The drawback here is that most lenders don’t offer fixed rates on interest-only loans. This means if interest rates increase, so do your weekly payments. In extreme cases, this can make an interest-only loan more costly than a fixed rate P&I loan.

The Final Word

The information in this article is general in nature. An interest-only loan could work for you in the right circumstances. Always speak to a financial advisor or mortgage broker before making a decision. If you have an investment property you can work out whether an interest-only loan is costing you more money than a principal and interest loan would using this investment property calculator. This information in this article is general only and does not take into account your individual circumstances. It should not be relied upon to make any financial decisions. UNO can’t make a recommendation until we complete an assessment of your requirements and objectives and your financial position. Interest rates, and other product information included in this article, are subject to change at any time at the complete discretion of each lender. Book a call in with UNO

5 stars for our service reviews from clients

Book Call Now

UNO home loans

Try Plans, by UNO
Mortgage calculators completely reimagined
Get Started
Considering a purchase or refinance?

Try Plans by UNO

Mortgage calculators completely reimagined
Get Started
☎️ 🚫 No cold call promise

Related Articles

TESTIMONIALS

What our customers are saying

Kealan Kelly
November 27, 2025
5 stars for our service reviews from clients
Mike and team were an absolute pleasure to work with. Super friendly and professional throughout and got us excellent rates
Read more
W S Lam Wong
November 27, 2025
5 stars for our service reviews from clients
When seeking for a loan for my unconventional lending requirements (via a trading trust), none of the Big 4 nor regular brokers could help. I'm glad I found Jesse who has a thorough understanding of my requirements and it has been a pleasant and seamless experience to have my loan organised by Jesse until settlement. A well deserved 5 stars review from me!!!
Read more
Haylee Hollings
November 26, 2025
5 stars for our service reviews from clients
Paul was amazing from the first phone call, he knew what we needed to know before we had even thought about it.. He and his team had us feeling at ease moving from Another country knowing he had us sorted and under control and in good hands. Paul will be our go to for other financial needs in the near future! Thanks again Paul and the team! Thankful kiwis!
Read more
Claire Blackall
November 26, 2025
5 stars for our service reviews from clients
Highly Recommend Paul Davey – Exceptional Mortgage Broker We worked with Paul Davey on a very complex mortgage application, and we honestly couldn’t have asked for a better broker. Paul worked incredibly hard for us from start to finish — he was patient, knowledgeable, and relentless in finding solutions when things got complicated. His communication was outstanding, always keeping us updated and making sure we understood every step of the process. It’s clear he truly cares about his clients and goes above and beyond to achieve the best outcome. We’re extremely grateful for everything Paul did for us and would recommend him without hesitation to anyone looking for a dedicated and trustworthy mortgage broker.
Read more
H Hollings
November 26, 2025
5 stars for our service reviews from clients
Paul is absolutely fantastic, he is absolutely worth reaching out to! He explains things in ways you can understand and help you get or work towards what you are wanting to achieve. You won’t regret reaching out to him and his team at all!
Read more
Owen
November 26, 2025
5 stars for our service reviews from clients
Paul and the team at UNO are excellent, very responsive with sound knowledge, highly recommend.
Read more
Katelin Organ
November 21, 2025
5 stars for our service reviews from clients
Exceptional service from Mike Parsons at UNO Mike recently assisted me with my home loan and managed the entire process with professionalism and expertise. He provided clear guidance, was an excellent communicator, and ensured everything ran smoothly from start to finish as well as obtaining the best rates. I highly recommend Mike Parsons for anyone seeking a knowledgeable and reliable home loan broker - was an excellent experience.
Read more
Alison Bliesner
November 18, 2025
5 stars for our service reviews from clients
What a fantastic team from start to finish
Read more
Ben Power
November 13, 2025
5 stars for our service reviews from clients
Jake has been fantastic to work with. He recently restructured our investment loans. With his problem-solving mindset, deep knowledge, and strategic approach, he was able to refinance all of our loans back to a major lender at a fantastic rate. While also releasing equity to fund another purchase. Jena, the senior broker support officer, was there every step of the way to support us and keep things running smoothly. Together, they made the whole process stress-free and efficient. Highly recommend the team!
Read more
Ashley Merrett
November 6, 2025
5 stars for our service reviews from clients
Highly Recommend – Exceptional First-Home Buyer Support! My wife and I recently purchased our first home and had an amazing experience working with Andrew Wyers from UNO Home Loans. As first-home buyers, we had plenty of questions, and Andrew guided us through every step with patience, clarity, and genuine care. He made the process feel simple and stress-free, ensured we were always informed, and went above and beyond to secure a great loan for us. His professionalism and communication were outstanding, and he worked seamlessly with everyone involved to keep things moving smoothly. We couldn’t be happier with the outcome and highly recommend Andrew and UNO Home Loans, especially to anyone looking for a supportive and trustworthy broker on their home-buying journey. Thank you, Andrew! 🙌
Read more
Catherine Merrett
November 6, 2025
5 stars for our service reviews from clients
My husband and I were incredibly nervous heading into the home-buying process. As first-time property investors, it felt like a monumental decision, and the learning curve seemed steep. However, Andrew Wyers and the entire team at UNO Home Loans completely changed our perspective. They made the process so much more enjoyable than we ever anticipated—it was surprisingly exhilarating! Andrew's exceptional communication was key. At moments when we felt uncertain or stressed (especially while juggling other life commitments), his guidance immediately put our minds at ease. We knew we were in safe hands with the UNO team and quickly learned to trust the process entirely, allowing us to learn along the way. Feeling guided through each step made a daunting task enjoyable, and within a matter of a couple of short months, we had achieved our goal: we were homeowners! Thank you so much to Andrew Wyers and the entire UNO Home Loans team for making this huge milestone a genuinely positive and seamless experience.
Read more
Margaret Giles
November 1, 2025
5 stars for our service reviews from clients
Due to complications arising from processes and forms required by the lender, what should have been a simple process became super complicated. UNO Home Loans dealt with everything with calm and serenity and professionalism.
Read more