This article is general information only and does not constitute financial or tax advice. Consult a qualified tax professional for advice specific to your situation.
Key takeaways
- The ABS monthly CPI indicator for July 2026, released Tuesday 26 August, printed at 3.5% annual headline, down from 3.8% in June.
- The RBA's preferred trimmed mean stayed at 3.6% for a second consecutive month. All four major banks had forecast the trimmed mean would edge down to 3.5%.
- Housing was the largest contributor to annual inflation at 5.0%, with new dwellings +5.7%, rents +3.6% and electricity +6.1% as government rebates continued rolling off (ABS release, 26 August 2026).
- Automotive fuel prices rose 7.5% in July after three consecutive monthly falls, driven by higher world oil prices and the partial unwinding of the federal government's fuel excise relief measures.
- The RBA August 2026 minutes, released Tuesday 25 August, showed the Monetary Policy Board discussed raising the cash rate by 25 basis points at the 11 August meeting before opting to hold at 4.35%.
- The minutes named five upside risks: Middle East oil prices, cost pass-through, AI and data centre investment, resilient household demand and weaker productivity (Michael West Media, 25 August 2026).
- ASX interbank cash rate futures currently price a 77-88% chance of a hold on 29 September, a 17% chance of a 25 basis point hike, and a 6% chance of a cut (RBA Rate Watch, Central Bank Watch).
- The forward curve implies a year-end 2026 cash rate around 4.50%, meaning the market is still carrying half of a full 25 basis point hike in the pipeline through November and December meetings.
- A 25 basis point rise on a $600,000 investor P&I loan adds about $96 per month to the repayment. An 800,000 investor loan adds about $128 per month on P&I and $167 per month interest-only.
- Big 4 fixed rates on standard investor two-year loans now sit above 6.29%, with Westpac joining CBA, NAB and ANZ in hiking fixed rates through August. The fixed rate window is closing, not opening.
- Inflation is not forecast back to the midpoint of the RBA's 2-3% target until late 2027. All four major banks now forecast no cash rate change in 2026 and cuts starting in 2027 (Canstar, August 2026).
- Immediate action: model a 25 basis point uplift against every investor loan in the portfolio, and book the retention conversation with the current lender before 29 September rather than after.
This article is general information only. It does not consider your personal circumstances and is not tax, credit, mortgage or investment advice. Speak to a licensed mortgage broker, registered tax agent or financial adviser before acting on any of the figures below.
The print itself#
The ABS monthly CPI indicator for July 2026, released Tuesday 26 August, has annual headline inflation at 3.5% and the RBA's preferred trimmed mean at 3.6%. Headline is down from 3.8% in the twelve months to June. Trimmed mean is unchanged from 3.6% in the twelve months to June.
The gap between what economists expected and what landed is the story. All four major banks had pencilled in a trimmed mean of 3.5% for July, calling for a two-tenths deceleration on the June print. Zero of four got the number right. The trimmed mean has now held at 3.6% for two consecutive months, sitting stubbornly above the top of the RBA's 2-3% target band (Savings.com.au write-up of the CommBank, Westpac, NAB and ANZ pre-release forecasts, 26 August 2026).
The composition:
- Housing rose 5.0% annually and remained the largest single contributor to the CPI print. Within that, new dwellings rose 5.7%, rents rose 3.6% and electricity rose 6.1% as the federal energy rebate continued to unwind.
- Food and non-alcoholic beverages rose 3.2%.
- Recreation and culture rose 2.6%.
- Automotive fuel rose 7.5% in July alone, after three consecutive monthly falls, on higher world oil prices and the partial rollback of the federal government's fuel excise relief measures.
The fuel move is what drove the headline lower relative to June (fuel excise unwinding removes a temporary drag from the base), but did nothing for the underlying picture. Trimmed mean strips fuel volatility out of the reading precisely so the RBA can see the persistence of the domestic price pressure. In July, that persistence stayed put.
Why the trimmed mean matters more than the headline#
The RBA does not set the cash rate off the headline number. It sets policy off the trimmed mean, because the trimmed mean strips out the top and bottom 15% of price changes in the basket. That takes fuel, fresh produce, and any one-off government subsidy in or out, and leaves the middle 70% of the basket where domestic inflation actually lives.
When the trimmed mean prints at 3.6% for two consecutive months while the headline moves from 3.8% to 3.5%, the read is that headline is being flattered by the composition, not by the underlying disinflation trend. That is the specific pattern that keeps a Central Bank cautious.
CBA senior economist Trent Saunders wrote after the print that strong growth in advertised rents over the past year will continue to feed into the rents component of CPI on a lag, meaning the housing contribution to trimmed mean is unlikely to fall meaningfully in the September or October prints (Savings.com.au, 26 August 2026). Cotality's Q2 2026 Quarterly Rental Review has rents at 5.9% annually and the pipeline of rolled-over leases catching up to that number over the next twelve months. The mechanical read: rents inside CPI printed at 3.6% in July and are more likely to accelerate than decelerate over the balance of 2026.
What the RBA August minutes actually said#
The RBA August 2026 minutes, released Tuesday 25 August, moved the language on where the Board's risks sit. The 11 August decision to hold at 4.35% was unanimous, but the minutes make clear the Board discussed a 25 basis point hike before landing on hold. The phrasing was that monetary policy was "sufficiently restrictive" to bring inflation back to target "over a reasonable period", which gave the Board time to wait for more evidence.
The upside risks named in the minutes are worth reading directly:
- Higher oil prices if the Middle East conflict escalates. This is the fuel-and-transport channel back into CPI.
- More businesses passing higher input costs through to consumers. This is the pipeline of pass-through from producer prices into retail.
- Stronger than expected AI and data centre investment. This is the demand-side surprise that has been showing up in the GDP Q1 2026 print and the June-quarter capex data.
- Resilient household demand. This is the retail trade and consumption signal.
- Weaker productivity growth. This is the wages-versus-output-per-hour channel, which raises unit labour costs even when the WPI is only running at 3.2%.
The one downside risk explicitly named is a faster slowdown in the labour market. The July jobs print at 4.5% unemployment landed at the RBA's own end-of-2026 forecast four months early, which is precisely the signal that gives the Board room to hold and wait. But the balance in the minutes runs to the upside risks, not the downside one. Multiple wire services and market commentators read the minutes as "hawkish" (Michael West Media, 25 August 2026, Investing.com).
Overlay the 25 August minutes with the 26 August CPI print and the read is consistent: the trimmed mean has not moved, the upside risks in the Board's own reasoning have not gone away, and the September 29 meeting is now the most consequential binary event in the mortgage calendar for the balance of 2026.
What the market is actually pricing#
Two independent trackers of ASX 30-day interbank cash rate futures give slightly different reads, but both are in the same ballpark:
- RBA Rate Watch has the market-implied probability of no change at the 29 September meeting at around 88%, with the balance skewed to a hike over a cut.
- Central Bank Watch's RBA tool has the same meeting at 77% hold, 17% hike, 5.96% cut.
The forward curve is the more interesting number. It implies a year-end 2026 cash rate around 4.50%, meaning the market is still carrying half of a full 25 basis point hike in the pipeline spread across the 29 September, 4 November and 9 December meetings. All four major bank economics teams currently forecast no cash rate change in 2026 and cuts starting in the first half of 2027 (Canstar Interest Rate Forecast, August 2026). The market is pricing a modestly more hawkish path than the Big 4 economists are calling.
For an investor mortgage held on variable pricing, the base case is a hold at 4.35% into December, with a one-in-six chance the September meeting delivers a 25 basis point hike. Neither number moves the immediate repayment. Both move the pricing at which a new fixed rate can be locked, and both move the retention discount a lender will offer on a refinance conversation.
What a 25 basis point hike costs an investor loan#
The pre-tax cash flow numbers, assuming a current investor P&I carded rate of 6.44% rolling to 6.69% on a 30-year term:
| Loan balance | Current monthly P&I | Post-hike monthly P&I | Monthly increase | Annual increase |
|---|---|---|---|---|
| $400,000 | $2,510 | $2,574 | $64 | $768 |
| $600,000 | $3,764 | $3,860 | $96 | $1,152 |
| $800,000 | $5,019 | $5,147 | $128 | $1,536 |
| $1,000,000 | $6,274 | $6,434 | $160 | $1,920 |
On interest-only pricing at the same rates, the incremental bill scales roughly one and a third times: about $125 a month on a $600,000 IO investor loan, $167 a month on an $800,000 IO investor loan.
A full 50 basis point move over the balance of 2026, which is the outer edge of what the ASX futures curve implies, doubles the bill: $192 a month on a $600,000 P&I loan, $334 a month on a $1,000,000 P&I loan. That is the scenario cost of the "hike now, no cut in 2026" tail.
The important note for tax planning: the interest is deductible against rent for an income-producing property held in a personal name. A landlord on the 32.5% marginal rate claws back roughly a third of the interest cost through the depreciation and interest schedule (ATO Rental Properties guide, 2025-26 edition). At the 37% marginal rate, it is close to 40%. Post-tax, the $96 monthly gross bill on a $600,000 investor loan is closer to $60 net at the top marginal band. That is the number that matters for cash flow.
The fixed rate window is closing, not opening#
The rate-move commentary since the July CPI print has been one direction. Westpac lifted its full suite of fixed home loan and investor rates in the week to 26 August, following earlier moves from CBA, NAB and ANZ (Savings.com.au, Westpac ANZ follow CBA NAB in hiking fixed home loan rates). Standard investor two-year fixed rates on the Big 4 now sit above 6.29% on published carded rates. That is up from a 6.14% low point earlier in the year and materially above the 5.99% offers that were on the market at the March 2026 Big 4 investor fixed rate window.
The mechanical driver is the bank funding curve. Fixed rates are priced off wholesale swap rates, which have moved higher as the futures market has pushed out cuts and priced in that half-a-hike still to come. Variable rates are priced off the RBA cash rate plus a competitive margin, and the mid-2026 refinance war has kept that competitive margin tight. The gap between the best variable and best fixed on standard investor P&I has widened materially in August.
Practical read for an investor:
- Pure fixed at current pricing is locking in the high end of the current rate cycle. Historically a bad trade.
- Pure variable at current pricing keeps you exposed to the 17% chance the RBA hikes on 29 September, but preserves the option to refinance to a cut when one arrives in 2027.
- Split (part fixed, part variable) is doing more of the risk management work on new investor files this month than either pure structure. A common split for a $600,000 investor loan at current pricing is $200,000 fixed for two years and $400,000 variable, which caps the downside on 40% of the loan while retaining refinance optionality on 60%.
The one thing that is not on the table any more is a cheap two-year fixed. That window closed in March.
The property investor action list for the next 33 days#
The RBA sits again on 29 September 2026. That is 33 days from the CPI print, and it is the specific date the market is pricing the biggest binary risk against. Three actions are worth completing this week rather than waiting for the meeting itself.
1. Model the 25 basis point uplift across every investor loan. Take the current balance, the current rate, and apply the uplift on a spreadsheet. Compare the new monthly repayment against the current rent roll for the property, net of the standard operating expense stack (management, insurance, council, water, maintenance provision). If the cash flow gap opens negative, that is the number you plug with a rent-review notice on any lease inside its window.
2. Book the retention conversation before 29 September. Retention desks at the Big 4 will hold a competitive discount on a good landlord file (strong LVR, clean arrears history, verified rental income) up to a Board meeting. They tighten in the 24 hours after any hawkish decision, and materially more if the decision is a hike. The specific ask is a 20-40 basis point discount off the standard carded rate on the same product, held for the following twelve months. The lever is a live refinance quote from a broker that shows what a competitor lender will do on the same file.
3. Do the rent-review maths on any lease inside its window. The defensible band for a spring rent review sits at 4.0-4.5%, above WPI at 3.2% and below the realised market rent shown on comparable listings inside a 2 km radius. Document the comparable. Lodge the notice with the required minimum period for the state (60 days in NSW and Victoria for periodic leases, two months in Queensland). The revised rent flows into the next servicing test the bank runs on your file, which improves any subsequent refinance quote.
The reason to complete all three before 29 September is that each of them takes 24-72 hours to move through the counterparties, and every one of them is materially easier to close on the current cash rate than on a hiked one.
The soft floor and the harder ceiling#
The base case remains that the RBA holds at 4.35% on 29 September and probably through the rest of 2026, with the first cut arriving in the first or second quarter of 2027. That is what the Big 4 economics teams call. It is what the ASX futures curve carries as the modal outcome. And it is the path the RBA's own August Statement on Monetary Policy modelled explicitly, with headline CPI back inside band by mid-2027 and trimmed mean back inside band by late 2027.
The tail risks in both directions are real. On the upside, a hawkish September triggered by an August labour market surprise, a further oil shock, or a stronger than expected September quarter CPI print. On the downside, a labour market that slips through 4.7% unemployment before Christmas and forces a cut earlier than the market is pricing. Neither is the base case. Both are close enough to the base case that the investor cash flow model needs to run scenarios against both.
For a landlord holding one or two investor properties, the exposure to the September decision is small in absolute dollars and manageable through the rent-review lever. For a landlord holding a portfolio of four to ten properties with $2.5 million to $6 million in investor debt, the cash flow gap opened by even a single hike is material. It is worth $4,000-9,600 a year in extra repayments before tax, and it is worth doing the retention work now rather than the crisis-management work in October.
The Propkt portfolio tools run the rate-scenario stack across the full portfolio in a single pass and generate the rent-review comparables from the standard listing feeds. The math still works with a spreadsheet and a realestate.com.au tab, but the discipline is the same either way. Model the uplift. Do the review. Book the retention conversation. The 29 September Board meeting is 33 days away and the mortgage market is already pricing what happens after it.
Sources#
- ABS, Consumer Price Index, Australia, July 2026, media release CPI rose 3.5% in the year to July 2026, 26 August 2026
- ABS, Monthly Consumer Price Index Indicator, latest release page
- Savings.com.au, Australia's inflation eases to 3.5% in July as underlying CPI stays elevated, 26 August 2026
- Savings.com.au, Westpac, ANZ follow CBA, NAB in hiking fixed home loan rates
- Investing.com, RBA minutes show rate hike debated as inflation risks keep policy outlook on edge, 25 August 2026
- Michael West Media, Hawkish RBA minutes reveal rate rise still an option, 25 August 2026
- CommBank newsroom, Cheaper fuel cools inflation, rent and power bills still bite
- Canstar, Interest Rate Forecast and Predictions for 2026
- RBA Rate Watch, Market-implied cash rate probability tracker
- Central Bank Watch, Reserve Bank of Australia probabilities tool
- ATO, Residential rental properties, rental expenses you can claim now