$900,000 Mortgage at 8%
See exactly what you'll pay on a $900,000 home loan at 8% interest. Monthly, fortnightly, and weekly repayments with total interest and savings tips.
Last verified: 5 May 2026Monthly repayments on a $900,000 mortgage at 8% over 30 years: $6,603.88
Monthly
$6,603.88
Fortnightly
$3,047.95
Weekly
$1,523.97
Total cost over 30 years
$2,377,397
Principal $900,000 + Interest $1,477,397
Total interest paid
$1,477,397
164% of the loan amount
25-Year vs 30-Year Term
| 25 years | 30 years | Difference | |
|---|---|---|---|
| Monthly repayment | $6,946.35 | $6,603.88 | +$342.46/mo |
| Total interest | $1,183,904 | $1,477,397 | Save $293,493 |
| Total repaid | $2,083,904 | $2,377,397 | Save $293,493 |
What If Rates Change?
| Rate | Monthly | Fortnightly | vs current |
|---|---|---|---|
| 7.5% | $6,292.93 | $2,904.43 | -$310.95/mo |
| 8%(current) | $6,603.88 | $3,047.95 | — |
| 8.5% | $6,920.22 | $3,193.95 | +$316.34/mo |
| 9% | $7,241.60 | $3,342.28 | +$637.72/mo |
| 9.5% | $7,567.69 | $3,492.78 | +$963.81/mo |
Income Needed
You'd need a household income of approximately $264,155/year ($22,013/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 $900,000 mortgage:
- Saves $354,747 in interest
- Pays off your loan 6.0 years sooner
Fortnightly vs Monthly Trick
Paying $3,301.94 fortnightly (half the monthly repayment) instead of $6,603.88 monthly means you make 26 half-payments per year — equivalent to 13 monthly payments instead of 12.
- Interest saved: $416,686
- Time saved: 7.2 years
Frequently Asked Questions
How much are repayments on a $900,000 mortgage?
At 8% over 30 years, monthly repayments on a $900,000 mortgage are $6,603.88. Fortnightly repayments are $3,047.95 and weekly repayments are $1,523.97.
What income do I need for a $900,000 mortgage?
Using the 30% rule (no more than 30% of gross income on housing), you would need a household income of approximately $264,155 per year to comfortably afford a $900,000 mortgage at 8%.
How much interest will I pay on $900,000 over 30 years?
At 8%, the total interest on a $900,000 mortgage over 30 years is $1,477,397. The total amount repaid would be $2,377,397.
What if interest rates rise above 8%?
If rates rise by 1% to 9%, monthly repayments on a $900,000 mortgage increase to $7,241.60 — an extra $637.72 per month.
Other Mortgage Amounts
Other Interest Rates
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General information and estimates only — not financial, tax, or legal advice. Always verify with a licensed adviser or the ATO.