2026-27 financial year

Mortgage repayments on $850,000

Repayments on a $850,000 loan at 6.49% over 30 years are $5,366.99 a month, $2,475.90 fortnightly, or $1,237.70 a week. Total interest over the 30 years is $1,082,116.

Term	Monthly	Fortnightly	Weekly
30 years	$5,366.99	$2,475.90	$1,237.70
25 years	$5,733.95	—	—

If rates move

How your monthly repayment would change if the average variable rate moved up or down by these amounts.

Rate	Monthly repayment	Change from today
5.49%	$4,820.87	-$546.12
5.74%	$4,954.97	-$412.02
5.99%	$5,090.72	-$276.27
6.24%	$5,228.07	-$138.92
6.49%	$5,366.99	$0.00
6.74%	$5,507.43	+$140.44
6.99%	$5,649.36	+$282.37

What the 2026 rises cost

The RBA raised the cash rate by 1.00 percentage points in 2026. At 5.49% your monthly repayment would have been $4,820.87—that is $546.12 less each month than today's 6.49%.

Income needed

A common affordability rule of thumb (not a lending rule) is that your home loan repayment should not exceed 30% of your gross monthly income. On $5,366.99 a month, you would need a gross income of $214,680 a year.

Nearby amounts

← $800,000 $900,000 → Borrowing power calculator RBA rate forecast Open in the mortgage calculator

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How this is worked out

The rate is 6.49%, the average owner-occupier variable rate as of September 2026 (Canstar).
Repayments use the standard annuity formula, with interest accruing daily over 365 days a year as in Australian practice.
The 2026 rises sum to 1.00 percentage points, assumed to be passed on in full.
The 30% income rule is an affordability rule of thumb, not a lending rule; lenders assess each borrower with their own criteria.

Estimate only, not financial or tax advice. See our methodology.

Choosing a term for a $850,000.00 loan

At the illustrative 6.49% rate, a 25-year term needs $366.96 more each month than a 30-year term. Check that difference against your budget before choosing a term. This is a scenario rate, not a current lender quote.

The comparison keeps the rate constant and excludes fees, offset balances and extra payments. A changing variable rate can alter both the repayment and total interest.

Term	Monthly repayment	Annual repayment budget
25 years	$5,733.95	$68,807.40
30 years	$5,366.99	$64,403.88

Frequently asked questions

What rate should I use for a $850,000.00 mortgage?

Use the rate offered for your loan and test alternative rates in the mortgage calculator. The worked example is a scenario, not a product recommendation or an offer of credit.

Is half the monthly repayment a true fortnightly repayment?

No. Paying half a monthly amount every fortnight produces an extra monthly equivalent over a full year. A true fortnightly schedule and that accelerated strategy should be compared separately.

Does this tell me whether a bank will approve the loan?

No. Repayment arithmetic does not assess your living expenses, other debts, deposit, lender policy or serviceability. Use the borrowing-power tool only as an additional estimate.