$600,000 Mortgage at 4%
See exactly what you'll pay on a $600,000 home loan at 4% interest. Monthly, fortnightly, and weekly repayments with total interest and savings tips.
Last verified: 1 July 2025Monthly repayments on a $600,000 mortgage at 4% over 30 years: $2,864.49
Monthly
$2,864.49
Fortnightly
$1,322.07
Weekly
$661.04
Total cost over 30 years
$1,031,217
Principal $600,000 + Interest $431,217
Total interest paid
$431,217
72% of the loan amount
25-Year vs 30-Year Term
| 25 years | 30 years | Difference | |
|---|---|---|---|
| Monthly repayment | $3,167.02 | $2,864.49 | +$302.53/mo |
| Total interest | $350,106 | $431,217 | Save $81,111 |
| Total repaid | $950,106 | $1,031,217 | Save $81,111 |
What If Rates Change?
| Rate | Monthly | Fortnightly | vs current |
|---|---|---|---|
| 3.5% | $2,694.27 | $1,243.51 | -$170.22/mo |
| 4%(current) | $2,864.49 | $1,322.07 | — |
| 4.5% | $3,040.11 | $1,403.13 | +$175.62/mo |
| 5% | $3,220.93 | $1,486.58 | +$356.44/mo |
| 5.5% | $3,406.73 | $1,572.34 | +$542.24/mo |
Income Needed
You'd need a household income of approximately $114,580/year ($9,548/month) to comfortably afford this mortgage using the 30% rule — where no more than 30% of your gross income goes toward housing costs.
Extra Repayment Impact
Paying an extra $100/week on your $600,000 mortgage:
- Saves $108,223 in interest
- Pays off your loan 6.7 years sooner
Fortnightly vs Monthly Trick
Paying $1,432.25 fortnightly (half the monthly repayment) instead of $2,864.49 monthly means you make 26 half-payments per year — equivalent to 13 monthly payments instead of 12.
- Interest saved: $67,660
- Time saved: 4.1 years
Frequently Asked Questions
How much are repayments on a $600,000 mortgage?
At 4% over 30 years, monthly repayments on a $600,000 mortgage are $2,864.49. Fortnightly repayments are $1,322.07 and weekly repayments are $661.04.
What income do I need for a $600,000 mortgage?
Using the 30% rule (no more than 30% of gross income on housing), you would need a household income of approximately $114,580 per year to comfortably afford a $600,000 mortgage at 4%.
How much interest will I pay on $600,000 over 30 years?
At 4%, the total interest on a $600,000 mortgage over 30 years is $431,217. The total amount repaid would be $1,031,217.
What if interest rates rise above 4%?
If rates rise by 1% to 5%, monthly repayments on a $600,000 mortgage increase to $3,220.93 — an extra $356.44 per month.
Other Mortgage Amounts
Other Interest Rates
Related Tools
General information and estimates only — not financial, tax, or legal advice. Always verify with a licensed adviser or the ATO.
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