RBA Rate Rise on the Cards: How to Protect Your Mortgage
All four of Australia's major banks are forecasting a 25 basis point hike at the RBA's September meeting — here is what it means for your home loan.
A Rate Hike Looks Likely at Tuesday's Meeting
The Reserve Bank of Australia meets on Monday and Tuesday, 28 and 29 September, and the broad market consensus points to another rate increase. All four of Australia's major banks have aligned their forecasts, tipping a 25 basis point hike that would lift the official cash rate (OCR) from 4.35% to 4.60%. By the third week of September, futures markets had placed the probability of a September hike at more than 90%, according to Australian Broker.
If delivered, this would be the fourth rate rise this year. The RBA left rates unchanged at both its June and August meetings, using that time to gauge whether previous hikes were working their way through the economy. By September, the picture had shifted.
RBA Governor Michele Bullock said that "developments since [the August meeting] suggest that although growth in the Australian economy is slowing, some of these upside risks to inflation appear to be materialising." She added that the central bank is "thinking about where those upside risks lie and whether or not we have got tight enough policy to deliver inflation back to target."
The July consumer price index (CPI) provided little comfort to borrowers. Headline inflation came in at 3.5%, with trimmed mean sitting at 3.6% — both remain above the RBA's target band of 2% to 3%. The RBA has made it consistently clear it will not return to rate cuts until inflation is back within that band. ANZ is taking the most aggressive stance among the major banks, forecasting rate hikes at both the September and November meetings.
What a Rate Rise Means for Your Repayments
The impact is direct and immediate. When the RBA raises rates, lenders typically pass the increase through to variable-rate home loan holders within weeks. A move from 4.35% to 4.60% means higher monthly repayments and a reduction in borrowing power for anyone still looking to buy.
Mortgage demand is already reflecting the pressure. Equifax data shows Australian mortgage demand fell 14.1% year on year in August 2026 — marking a fifth consecutive month of contraction. New South Wales recorded the steepest decline of the mainland states at 15.9%, while Western Australia saw the smallest fall, down 10.4%.
First-home buyer applications fell even harder, dropping 20% year on year in August. Equifax Australia executive general manager Moses Samaha said borrowing sentiment remains subdued and warned that another rate rise could push that floor lower.
Melbourne-based broker Cara Julian of Brava Finance told Australian Broker she expects "another confidence wobble" if the hike comes through. But she does not think buyers will disappear. "Life doesn't wait around for the RBA to make their cash rate decision. People still marry, separate, have babies, move, invest and get sick of renting," she said. "What changes is the math: buyers may need to adjust their budget, suburb or expectations."
Who Feels the Pressure Most
Investors are in the crosshairs. Melbourne broker Jo Attard of Heart Financial said investors will be the segment to watch most closely. "When interest rates rise, the numbers can become much harder to make work, particularly for highly leveraged investors, or properties with relatively low rental yields." A further increase could prompt some property investors to reassess whether their holdings still stack up on a cash-flow basis — or whether to buy, hold, or sell.
First-home buyers are also acutely exposed. Bernard Desmond, CEO of Melbourne's Blank Financial, noted that for someone already stretching to enter the market, "even a relatively small reduction in borrowing capacity can make the difference between buying now, changing suburbs or having to wait." The Equifax age breakdown tells that story clearly: mortgage demand fell 21.7% among 18- to 25-year-olds and 18.1% among 26- to 35-year-olds in August, compared with just 1.7% for borrowers aged 66 and over.
What to Do Before Tuesday
Whatever the RBA decides, there are practical steps worth taking now.
First, check what your existing rate looks like compared to the market. Refinancing data offers an encouraging signal: while overall refinancing demand fell 12% year on year in August, refinancing with a different lender fell just 1.1% — the smallest decline since that measure turned negative. That suggests lender-switching is proving resilient, and for good reason: it is one of the few levers borrowers can actually pull in a rate-rising cycle.
If you have not reviewed your rate in the past 12 months, this week is a good prompt. Compare refinance options across the market, or use the refinance savings calculator to see what a lower rate could return to your pocket each month.
If you are buying, pressure-test your budget at both current rates and the forecast 4.60% by using the borrowing power calculator.
Broker Jo Attard summed up the likely mood well: when rates rise, "the immediate response would be caution." That caution is sensible. But caution paired with a clear plan is better than caution without one. Review what you have, understand what is available across lenders, and make sure your home loan is still working as hard as it can for your situation.