$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: 1 July 2025

Monthly 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

$750K mortgage $800K mortgage $850K mortgage $950K mortgage $1M mortgage $1.1M mortgage

Other Interest Rates

$900,000 at 4%$900,000 at 4.5%$900,000 at 5%$900,000 at 5.5%$900,000 at 6%$900,000 at 6.5%$900,000 at 7%$900,000 at 7.5%

General information and estimates only — not financial, tax, or legal advice. Always verify with a licensed adviser or the ATO.

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