Calculate your mortgage repayments instantly. See exactly what you'll pay weekly, fortnightly or monthly — and how to pay off your home loan faster.
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Every home loan repayment is split into principal (paying down the actual loan) and interest (the cost of borrowing). Most Australian lenders calculate interest daily on your outstanding balance and charge it monthly — so every extra dollar you pay reduces tomorrow’s interest.
In the first 5–10 years, the majority of each repayment goes to interest. On a $500,000 Australian home loan at 6%, your first monthly payment of $3,000 includes approximately $2,500 in interest and only $500 in actual debt reduction.
Over time, the balance shifts. As your principal decreases, less interest is charged and more of each payment reduces your debt. Because most Australian lenders calculate interest daily, making extra repayments early has the biggest compounding impact over the life of your loan.
Paying fortnightly instead of monthly means you make 26 payments per year — which equals 13 monthly payments instead of 12. Most Australian lenders support fortnightly repayments with no additional fees.
That one extra payment per year goes straight to reducing your principal. Because Australian lenders calculate interest daily, every dollar of principal reduction immediately lowers your daily interest charge. Over the life of a 30-year home loan, this can shave 4–5 years off your term and save tens of thousands in interest.
The best part? You don't need to earn more or sacrifice anything. You're paying the same amount per fortnight — the maths just works in your favour because there are 26 fortnights in a year, not 24. Simply call your lender or ask your broker to switch your repayment frequency.
A lower deposit means a higher Loan-to-Value Ratio, which often means a higher interest rate. In Australia, the average variable mortgage rate in 2026 sits around 5.5–6.5%. Lenders reward borrowers with 20%+ deposits with better rates because they represent lower risk.
Fixed rates give you certainty — your repayments stay the same for 1–5 years. Variable rates move with the RBA cash rate and usually offer more flexibility including offset accounts and unlimited extra repayments. Most Australian borrowers choose variable for the flexibility.
A mortgage broker compares 30+ Australian lenders to find your best rate. Going direct to your bank means you only see their products. Even a 0.3% difference in rate saves tens of thousands over the life of your home loan — which is why using a broker is one of the smartest moves a first home buyer can make.
Even 0.3% lower saves tens of thousands over 30 years. Already have a loan? Refinancing a $500K loan at 0.5% lower saves around $200/month. NestPath vetted brokers specialise in first home buyers.
Your mortgage repayment depends on three things: the loan amount, the interest rate, and the loan term. Lenders use a formula that splits each repayment into two parts — principal (paying down the actual debt) and interest (the cost of borrowing). In the early years, most of your repayment goes toward interest. Over time, more goes toward principal as the balance decreases.
For example, on a $500,000 loan at 6.0% over 30 years, your monthly repayment is approximately $2,998. In the first year, about $2,494 of each monthly payment is interest and only $504 goes toward the principal. By year 15, it flips — more goes to principal than interest.
Wondering how your repayments compare to the average Australian mortgage holder? Here's the latest data from the Reserve Bank of Australia and the Australian Bureau of Statistics, current as of December 2025.
The average new owner-occupier home loan in Australia is $736,257 (ABS, December 2025), with an average variable interest rate of 5.50% p.a. (RBA, November 2025). Over a 30-year loan term, that works out to a monthly repayment of approximately $4,180.
For first home buyers specifically, the picture is slightly different. The average first home buyer loan is $607,624 — about $129,000 less than the all-buyer average — reflecting smaller starter homes and a higher uptake of low-deposit schemes like the First Home Guarantee. At the same 5.50% rate over 30 years, that translates to a monthly repayment of around $3,449.
Average loan sizes — and therefore repayments — vary dramatically by state. Here's what an average owner-occupier mortgage looks like across Australia in 2026, based on ABS December 2025 data and a 5.50% variable rate over 30 years (principal and interest):
| State / Territory | Average loan size | Approx monthly repayment |
|---|---|---|
| NSW | $873,000 | $4,955 |
| VIC | $660,000 | $3,748 |
| QLD | $720,000 | $4,089 |
| SA | $580,000 | $3,294 |
| WA | $665,000 | $3,776 |
| TAS | $504,000 | $2,862 |
| ACT | $620,000 | $3,521 |
| NT | $481,000 | $2,732 |
| National average | $736,257 | $4,180 |
State averages calculated from ABS lending indicators (December 2025 quarter), Canstar 2026, and loans.com.au 2026 data. Use the calculator above to estimate your own repayment based on your loan size, rate, and term.
If you want to ballpark a different loan size or rate without re-running the calculator, the table below shows estimated monthly principal-and-interest repayments at common combinations.
| Loan amount | 5.0% | 5.5% | 6.0% | 6.5% |
|---|---|---|---|---|
| $400,000 | $2,147 | $2,271 | $2,398 | $2,528 |
| $500,000 | $2,684 | $2,839 | $2,998 | $3,160 |
| $600,000 | $3,221 | $3,407 | $3,597 | $3,793 |
| $700,000 | $3,758 | $3,974 | $4,197 | $4,425 |
Monthly principal & interest repayments over a 30-year term. Divide by 4.33 for weekly estimates or by 2.17 for fortnightly. Figures exclude fees, LMI and offset-account effects.
Before you search for property, check what you can actually borrow with the free borrowing power calculator and factor in stamp duty using the stamp duty calculator. If your deposit is under 20%, the LMI guide explains how Lenders Mortgage Insurance can add $10,000–$30,000 to your upfront costs.
If your monthly repayment is below your state's average, you're either borrowing less than the typical buyer, on a lower interest rate, or both. Both are good signals.
If your repayment is above the state average, that's not necessarily a problem — but it's worth checking that:
For first home buyers specifically, the typical FHB repayment of ~$3,449/month should fit within roughly $11,500/month gross household income (about $138K combined annual). If you're stretched well beyond that, the loan may be too large for your stage — talk to a broker before stress builds.
Three levers move your repayment number more than anything else:
The fortnightly trick: paying half your monthly repayment every fortnight (instead of monthly) results in 26 fortnights = effectively 13 months of repayment per calendar year. On a $700,000 loan at 5.50%, that one switch shaves 4–5 years off the loan and saves around $90,000–$110,000 in interest — without changing the dollar value of each repayment.
If your repayments are stretching the budget, these three moves are worth pricing — in this order:
For more on choosing between fixed and variable, see our home loan interest rates guide. For full mechanics on how a construction loan converts to a standard P&I home loan at completion, see our construction loans guide.
Switching from monthly to fortnightly repayments can save you thousands and shave years off your loan — without paying extra. Here's why: there are 26 fortnights in a year but only 12 months. If you pay half your monthly repayment every fortnight, you end up making 13 months of repayments per year instead of 12.
On a $500,000 loan at 6.0% over 30 years: monthly repayments take 30 years and cost $579,191 in total interest. Fortnightly repayments (half monthly) take approximately 25 years and save roughly $95,000 in interest. That's 5 years off your mortgage and almost $100,000 saved — just by paying fortnightly instead of monthly.
Even small extra repayments make a massive difference over the life of a loan. On a $500,000 loan at 6.0% over 30 years:
Most variable rate home loans allow unlimited extra repayments. Fixed rate loans may restrict extra repayments to $10,000–$20,000 per year. Check with your lender or speak to a broker about the best strategy for your loan.
One cost that doesn't show up in your repayment calculation but your lender requires before settlement: building insurance. Premiums typically run $1,200–$2,500 per year — compare home insurance a few weeks before settlement so the certificate of currency is ready when your lender asks for it.
Your interest rate is the single biggest factor in your repayment amount. A 0.5% difference on a $500,000 loan changes your monthly repayment by approximately $150 — that's $1,800 per year.
Variable rate: moves up and down with the market (influenced by the RBA cash rate). More flexible — usually allows extra repayments and offset accounts. Fixed rate: locked for 1–5 years. Certainty on repayments, but break costs if you want to switch early. Many borrowers split their loan — fix part for certainty, leave part variable for flexibility.
Not sure which is right for you? A mortgage broker compares 30+ lenders to find the best rate for your situation — get matched for free.
At 5.5% over 30 years, repayments are approximately $2,839/month, $1,310/fortnight or $655/week. Total interest over the full 30-year term is around $522,000. At 5.0% monthly repayments fall to $2,684; at 6.5% they climb to $3,160.
Yes — fortnightly is the sweet spot. You make 26 payments per year which equals 13 monthly payments instead of 12. This can save tens of thousands in interest and cut years off your loan with no extra effort. Weekly payments offer similar benefit but the difference over fortnightly is marginal.
On a $500,000 loan, dropping from 6.5% to 6.0% saves approximately $55,000 in total interest over 30 years. This is why comparing lenders through a broker matters — even a small rate difference compounds into massive savings.
Most variable rate loans allow unlimited extra repayments. Fixed rate loans often cap extra repayments at $10,000–$30,000 per year. Extra repayments go directly to reducing your principal and can dramatically shorten your loan term.
At 6.0% over 30 years, monthly repayments on a $500,000 mortgage are approximately $2,998. Fortnightly repayments would be $1,499 (but you’d pay it off 5 years faster). Use the calculator above for your exact loan amount and rate.
Four ways: refinance to a lower interest rate, extend your loan term (reduces repayments but increases total interest), switch to interest-only temporarily (not recommended long-term), or make extra repayments now to reduce the balance faster. A broker can help you find the best option.
Around $600,000 nationally, with first home buyers typically borrowing $480,000 to $550,000. At 5.5% over 30 years, a $600,000 loan has monthly repayments of approximately $3,407.
On a variable rate, your repayments increase. A 0.25% rate rise on a $500,000 loan adds approximately $75 to your monthly repayment. Lenders assess you at 3% above your actual rate (APRA serviceability buffer), so most borrowers have headroom built in.
This calculator provides estimates only and should not be relied upon for financial decisions. Actual repayments depend on your lender, loan product and individual circumstances. NestPath is not a financial adviser — seek independent advice before making financial decisions.
Free tools and guides for Australian first home buyers