$300,000 Mortgage at 6.5%

See exactly what you'll pay on a $300,000 home loan at 6.5% interest. Monthly, fortnightly, and weekly repayments with total interest and savings tips.

Last verified: 1 July 2025

Monthly repayments on a $300,000 mortgage at 6.5% over 30 years: $1,896.20

Monthly

$1,896.20

Fortnightly

$875.17

Weekly

$437.59

Total cost over 30 years

$682,633

Principal $300,000 + Interest $382,633

Total interest paid

$382,633

128% of the loan amount

25-Year vs 30-Year Term

	25 years	30 years	Difference
Monthly repayment	$2,025.62	$1,896.20	+$129.42/mo
Total interest	$307,686	$382,633	Save $74,947
Total repaid	$607,686	$682,633	Save $74,947

What If Rates Change?

Rate	Monthly	Fortnightly	vs current
6%	$1,798.65	$830.15	-$97.55/mo
6.5%(current)	$1,896.20	$875.17	—
7%	$1,995.91	$921.19	+$99.70/mo
7.5%	$2,097.64	$968.14	+$201.44/mo
8%	$2,201.29	$1,015.98	+$305.09/mo

Income Needed

You'd need a household income of approximately $75,848/year ($6,321/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 $300,000 mortgage:

Saves $168,000 in interest
Pays off your loan 11.6 years sooner

Fortnightly vs Monthly Trick

Paying $948.10 fortnightly (half the monthly repayment) instead of $1,896.20 monthly means you make 26 half-payments per year — equivalent to 13 monthly payments instead of 12.

Interest saved: $88,122
Time saved: 5.8 years

Frequently Asked Questions

How much are repayments on a $300,000 mortgage?

At 6.5% over 30 years, monthly repayments on a $300,000 mortgage are $1,896.20. Fortnightly repayments are $875.17 and weekly repayments are $437.59.

What income do I need for a $300,000 mortgage?

Using the 30% rule (no more than 30% of gross income on housing), you would need a household income of approximately $75,848 per year to comfortably afford a $300,000 mortgage at 6.5%.

How much interest will I pay on $300,000 over 30 years?

At 6.5%, the total interest on a $300,000 mortgage over 30 years is $382,633. The total amount repaid would be $682,633.

What if interest rates rise above 6.5%?

If rates rise by 1% to 7.5%, monthly repayments on a $300,000 mortgage increase to $2,097.64 — an extra $201.44 per month.

Other Mortgage Amounts

$200K mortgage $250K mortgage $350K mortgage $400K mortgage $450K mortgage

Other Interest Rates

$300,000 at 4%$300,000 at 4.5%$300,000 at 5%$300,000 at 5.5%$300,000 at 6%$300,000 at 7%$300,000 at 7.5%$300,000 at 8%

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

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