$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: 5 May 2026Monthly 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
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.