Last updated: June 2026
Choosing your first home loan is exciting — but also a bit overwhelming. Should you go fixed, variable, or somewhere in between? And what’s the difference between principal-and-interest and interest-only anyway? This guide cuts through the jargon and walks you through the core loan structures available to Australian first home buyers in 2026, including how the new Home Guarantee Scheme changes from 1 October 2025 affect your options.
Key Takeaways
- Three main structures: variable (flexible), fixed (certainty), and split (best of both)
- Principal-and-interest (P&I) is almost always the right choice for first home buyers — you build equity, pay less interest over time, and qualify for government schemes
- From 1 October 2025: the Home Guarantee Scheme has unlimited places, no income caps, and higher property price caps — up to $1.5 million in Sydney
- A mortgage broker can compare hundreds of loans and match you to the right structure for your budget and goals
Understanding Home Loan Structures
When lenders talk about “loan structure,” they mean two things: how your interest rate is set, and how you repay the principal (the amount you borrowed).
The three rate structures
- Variable rate — your interest rate moves up or down in line with the lender’s decisions (which usually follow Reserve Bank of Australia cash rate changes). You get flexibility: most variable loans let you make extra repayments, redraw funds, and use an offset account.
- Fixed rate — your interest rate is locked for a set period, typically one to five years. Your repayments stay the same regardless of what the RBA does, which makes budgeting easier. The trade-off? You’ll usually face restrictions on extra repayments (often capped at $10,000–$30,000 per year) and you can’t redraw or use an offset account during the fixed term.
- Split loan — part of your loan is fixed, part is variable. For example, you might fix 50% for three years and keep the other 50% variable. You get some repayment certainty and some flexibility for extra repayments.
Principal and Interest vs Interest Only
This is the second half of loan structure, and it’s where first home buyers need to pay close attention.
Principal-and-interest (P&I)
Every repayment includes interest plus a chunk of the principal. Over time, you chip away at the loan balance and build equity in your home. This is the default structure for owner-occupiers, and it’s the only option if you’re using a government scheme like the First Home Guarantee or Help to Buy.
Example (25-year loan term, 6% interest rate):
- Loan amount: $500,000
- Monthly P&I repayment: ~$3,222
- You’ll pay the loan off completely by the end of the term
Interest-only (IO)
You only pay the interest each month; the principal stays the same. After the interest-only period ends (usually five years for owner-occupiers), the loan reverts to P&I and your repayments jump.
Same $500,000 loan at 6%:
- Monthly IO repayment: ~$2,500 (looks cheaper!)
- But after five years, you still owe $500,000, and your repayments jump to ~$3,582/month for the remaining 20 years
- Total interest over the life of the loan is much higher
(Source: Canstar)
Why P&I is the right choice for first home buyers
- You build equity from day one — the property becomes more yours with every payment
- You pay tens (or hundreds) of thousands less in interest over the loan term
- You’re eligible for every first home buyer scheme — the First Home Guarantee, Help to Buy, and state-based grants all require P&I loans
- Lenders see you as lower risk, so you’ll typically get a better interest rate
Interest-only loans are designed for investors who want to maximise tax deductions and preserve cash flow. Unless you’re buying an investment property, stick with principal-and-interest.
How the 2025/26 Home Guarantee Scheme Affects Your Loan Choice
The Australian Government’s First Home Guarantee (FHBG), part of the Home Guarantee Scheme, makes it easier to buy your first home with a smaller deposit. And from 1 October 2025, the scheme got a major upgrade.
What changed on 1 October 2025
- Unlimited places — no more annual cap; every eligible first home buyer can access the scheme
- No income caps — the old $125,000 (singles) / $200,000 (couples) limit is gone
- Higher property price caps — you can now buy a more expensive home and still qualify
New property price caps (effective 1 October 2025)
| State / Territory | Capital city / major regional | Other regional |
|---|---|---|
| New South Wales | $1,500,000 | $1,000,000 |
| Victoria | $950,000 | $850,000 |
| Queensland | $1,000,000 | $650,000 |
| Western Australia | $850,000 | $550,000 |
| South Australia | $900,000 | $500,000 |
| Tasmania | $700,000 | $650,000 |
| Northern Territory | $750,000 | $650,000 |
| Australian Capital Territory | $950,000 | N/A |
Regional centres such as the Illawarra, Newcastle, Lake Macquarie, Geelong, the Gold Coast, and the Sunshine Coast are treated as “capital city / major regional” for pricing purposes.
(Source: Housing Australia)
How the scheme works with your loan structure
You can buy with just a 5% deposit — the government guarantees the rest (up to 15%), so you avoid paying Lenders Mortgage Insurance (LMI). That can save you $10,000–$40,000+ depending on your loan size.
The scheme is compatible with:
- Variable rate loans (most popular — you get full flexibility)
- Fixed rate loans (if you prefer repayment certainty)
- Split loans (some lenders allow this)
But you must structure the loan as principal-and-interest. Interest-only is not permitted under the Home Guarantee Scheme.
If you’re a first home buyer with a 5–10% deposit, this scheme is a game-changer. Speak with a broker to confirm your eligibility and find a participating lender.
Choosing Between Variable, Fixed and Split Loans
So which rate structure is right for you? Here’s a practical breakdown.
Go variable if…
- You want the flexibility to make extra repayments whenever you have spare cash
- You’d like to use an offset account to reduce interest (every dollar in the offset acts like you’ve paid it off the loan)
- You’re comfortable with the risk that rates might rise
- You plan to sell or refinance within a few years (no break fees on variable loans)
Best for: First home buyers who value flexibility and have a bit of financial buffer.
Go fixed if…
- You’re on a tight budget and need to know exactly what you’ll pay each month
- You think interest rates will rise soon and want to lock in today’s rate
- You don’t plan to make large extra repayments
- You prefer certainty over flexibility
Best for: First home buyers who want predictable budgeting and peace of mind.
Go split if…
- You want a middle ground — some stability, some flexibility
- You’re not sure whether rates will rise or fall, so you want to hedge your bets
- You’d like to make extra repayments on part of the loan while enjoying rate certainty on the rest
Best for: First home buyers who want the best of both worlds and don’t mind slightly more admin (you’ll have two loan accounts).
What about loan term?
Most first home buyers choose a 25- or 30-year loan term. A longer term means lower monthly repayments (easier on your budget now) but more interest paid over time. A shorter term (say, 20 years) means higher repayments but you own your home sooner.
The beauty of a variable or split loan? You can always make extra repayments and effectively shorten the term without locking yourself into higher minimum repayments.
Frequently Asked Questions
Can first home buyers get interest-only loans?
Technically yes, but it’s not a good idea. Interest-only loans cost you far more over the long run, you don’t build any equity, and you won’t qualify for government schemes like the First Home Guarantee or Help to Buy. Stick with principal-and-interest unless you’re buying an investment property.
Do I need a 20% deposit to buy my first home in 2026?
No. Thanks to the First Home Guarantee, eligible buyers can purchase with as little as 5% deposit and avoid Lenders Mortgage Insurance. From 1 October 2025, there are no income caps and no limit on the number of places, so more Australians can access the scheme. If you don’t qualify or the property is above the price cap, you can still buy with 10% or 15% deposit — you’ll just pay LMI.
What’s the best loan structure for a first home buyer?
It depends on your financial situation and goals. If you value flexibility and want to pay off your loan faster, go variable. If you need budget certainty, go fixed. If you want both, go split. Every first home buyer is different — a mortgage broker can run the numbers and recommend the structure that fits your circumstances.
Can I change my loan structure later?
Yes. You can refinance from variable to fixed (or vice versa) once your current loan terms allow it. Fixed loans often have break fees if you exit early, but variable loans are usually penalty-free. Many borrowers start with a split loan and then refinance to fully variable once the fixed period ends.
How does an offset account work, and should I get one?
An offset account is a transaction account linked to your home loan. Every dollar you keep in the offset reduces the balance on which interest is calculated. For example, if you have a $500,000 loan and $20,000 in your offset, you only pay interest on $480,000. It’s one of the most powerful tools for paying off your loan faster, and it’s available on most variable loans (but not fixed). If you’re a disciplined saver, definitely get one.
Conclusion
Choosing the right loan structure is one of the most important decisions you’ll make as a first home buyer. Get it right, and you’ll save thousands in interest, pay off your home faster, and enjoy financial flexibility. Get it wrong, and you might end up locked into a loan that doesn’t suit your lifestyle or goals.
The good news? You don’t have to figure it out alone. A mortgage broker can compare hundreds of loan products, explain your options in plain English, and recommend a structure tailored to your deposit, income, and plans.
Book a free, no-obligation chat with a Your Money Home Loans broker today and find the loan structure that’s right for you.
Disclaimer
This is general information only and does not take your personal circumstances into account. Speak with a Your Money Home Loans broker for advice tailored to you.