$300,000 Mortgage at 6%

See exactly what you'll pay on a $300,000 home loan at 6% 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% over 30 years: $1,798.65

Monthly

$1,798.65

Fortnightly

$830.15

Weekly

$415.07

Total cost over 30 years

$647,515

Principal $300,000 + Interest $347,515

Total interest paid

$347,515

116% of the loan amount

25-Year vs 30-Year Term

	25 years	30 years	Difference
Monthly repayment	$1,932.90	$1,798.65	+$134.25/mo
Total interest	$279,871	$347,515	Save $67,643
Total repaid	$579,871	$647,515	Save $67,643

What If Rates Change?

Rate	Monthly	Fortnightly	vs current
5.5%	$1,703.37	$786.17	-$95.28/mo
6%(current)	$1,798.65	$830.15	—
6.5%	$1,896.20	$875.17	+$97.55/mo
7%	$1,995.91	$921.19	+$197.26/mo
7.5%	$2,097.64	$968.14	+$298.99/mo

Income Needed

You'd need a household income of approximately $71,946/year ($5,996/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 $149,545 in interest
Pays off your loan 11.4 years sooner

Fortnightly vs Monthly Trick

Paying $899.33 fortnightly (half the monthly repayment) instead of $1,798.65 monthly means you make 26 half-payments per year — equivalent to 13 monthly payments instead of 12.

Interest saved: $74,436
Time saved: 5.5 years

Frequently Asked Questions

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

At 6% over 30 years, monthly repayments on a $300,000 mortgage are $1,798.65. Fortnightly repayments are $830.15 and weekly repayments are $415.07.

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 $71,946 per year to comfortably afford a $300,000 mortgage at 6%.

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

At 6%, the total interest on a $300,000 mortgage over 30 years is $347,515. The total amount repaid would be $647,515.

What if interest rates rise above 6%?

If rates rise by 1% to 7%, monthly repayments on a $300,000 mortgage increase to $1,995.91 — an extra $197.26 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 6.5%$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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