Why CommBank still expects a hold
There were already signs tighter monetary policy is weighing on the economy, Yeaman said.
Growth has slowed, house prices are falling and unemployment has risen to 4.7%, from a recent low of 3.4%.
Yeaman also said the full effect of higher interest rates would take time to reach the economy and labour market, with lags of around 12 to 18 months, meaning the impact of this year's four rate increases has not yet been fully felt.
RBA Assistant Governor Christopher Kent made a similar point in a discussion with CommBank Head of Australian Economics Belinda Allen at the bank's Global Markets Conference on Monday.
"We know monetary policy operates with long and variable lags," Kent said.
The RBA's next monetary policy decision is due on 3 November.
Rate rise risk is building
While November remains a hold in CommBank's central forecast, Yeaman said the outlook beyond that had become more uncertain due to the continuing pressure on inflation.
"The 'last mile' on inflation is proving difficult," he said.
Trimmed mean inflation remains around 3.5%, and a range of longer-term forces could make inflation harder to bring down than in previous cycles, Yeaman said, pointing to weak productivity, high public demand and strong investment in areas including AI, data centres, energy, defence, transport and housing.
That investment could ultimately lift Australia's productive capacity. But in the shorter term, it is also adding demand for workers, construction, electricity and technology.
‘Neutral rate’ could be rising
Yeaman also says the neutral interest rate - an estimate of the cash rate that neither speeds up nor slows down the economy - may have risen.
CommBank's real-time estimate of the neutral rate has increased to about 3.85%, around 0.65 percentage points higher than a year ago, Yeaman said.
If neutral is higher, today's 4.60% cash rate may not be restraining the economy by as much as the headline number suggests.
The RBA’s Kent said there was no single measure that could tell the RBA exactly how tight financial conditions were.
Neutral-rate estimates were a useful starting point, but remained highly uncertain, he said.
Household spending slows
Yeaman’s outlook came as new CommBank data showed household spending has slowed during 2026.
Senior Economist Ashwin Clarke said spending growth to early October remained below the stronger rates recorded in late 2025 and early 2026.
The slowdown has paused somewhat in recent months, with spending remaining resilient despite higher interest rates and fuel prices. CommBank still expects further weakness as pressure on household incomes flows through.
The pullback is also uneven.
Spending on eating and drinking out remains resilient, and retail spending, including clothing and electronics, has broadly tracked last year's levels.
But clearer signs of weakness are emerging in housing-related spending. Storage and removalist spending is running below 2025 levels, with housing turnover now around 20% to 30% lower than a year ago. Spending on home improvements and maintenance has also started to soften, the data shows.