Key Highlights

  • Private business investment rose more than 10% over the year, with AI-related demand a recurring theme.
  • Household consumption slowed and housing credit fell, but the Board noted growth in business investment and debt.
  • The RBA sees domestic capacity pressures and weak productivity, and business activity formed part of the case for tighter financial conditions.

Much of the public debate about rate rises focuses on households, but the Reserve Bank's September statement singled out a different source of momentum: strong growth in business investment and borrowing.

When the Reserve Bank of Australia raises interest rates, the coverage that follows tends to centre on home loans. That is understandable, given how many Australians carry a mortgage. Yet one line in the Monetary Policy Board's 29 September 2026 statement points to a part of the economy that receives far less attention: "growth in business investment and debt is strong".

That observation sat alongside signs of cooling elsewhere, including falling housing prices and a noticeable drop in new housing loans. Understanding why the Board highlighted business activity helps explain why it lifted the cash rate target by 25 basis points to 4.60%, effective 30 September, even as household demand was easing.

The minutes of the 28–29 September meeting describe an economy with diverging parts. Household consumption slowed to a below-trend pace in the first half of 2026, which the minutes said was expected. On housing, the statement noted that "housing prices have fallen in most capital cities" and that "new housing loans have declined noticeably". New housing loan commitments fell sharply, led by investors.

Business was a different story. June quarter GDP was a little stronger than expected, and the minutes said the outcome was led by private business investment, which was up more than 10% over the year. The statement, in paraphrase, said output growth had slowed but was stronger than expected in the June quarter.

For a central bank trying to cool demand, this matters. If households are pulling back but businesses are expanding investment and borrowing to fund it, total spending in the economy may not be slowing as much as the household figures alone would suggest.

Where the investment is coming from

The RBA has linked part of this strength to global forces. In an August fireside chat titled "The Restrictive Stance of Monetary Policy", Assistant Governor (Financial Markets) Christopher Kent referred to "resilient global demand because of AI-related investment".

The Board's September statement, in paraphrase, listed AI-related demand pushing up technology goods prices among the upside risks to inflation, together with a broader Middle East conflict and higher global energy prices. The AI theme therefore shows up twice in the RBA's thinking: as a driver of investment activity and as a source of price pressure.

The August Statement on Monetary Policy, with forecasts finalised on 5 August before the September rate rise, projected business investment growth of 6.5% in the year to June 2026, easing to 4.3% by December 2026 and 4.2% by June 2027. The same forecasts had investment growth slowing further to 3.2% by December 2027, 1.7% by June 2028 and 0.2% by December 2028. The minutes' figure of more than 10% annual growth in private business investment came from later June quarter data, and the two series may not be defined identically, so they are best read separately. What both convey is that business investment has been a significant source of growth.

Why strong investment can add to inflation pressure

Investment is generally good for an economy's long-run capacity. In the short run, though, it adds to demand for labour, materials and equipment. When an economy is already running close to its limits, that extra demand can push up prices.

The Board's statement, in paraphrase, said capacity pressures remain. Governor Michele Bullock was direct about the source of inflation at her media conference: "Inflation is too high and has been driven by domestic capacity pressures." The minutes recorded that staff judged the underlying inflation surprise more likely reflected domestic capacity pressures than Middle East cost pass-through.

Productivity adds to the picture. The minutes said unit labour cost growth was above a level consistent with the inflation target, driven mainly by weak productivity rather than strong wages. Bullock summed it up: "The bottom line is that productivity is doing nothing." The August forecasts had labour productivity falling 0.5% over the year to June 2026 and December 2026, before recovering modestly.

In that setting, strong business borrowing and investment are part of the demand the Board judged it needed to restrain. The statement concluded that "a further tightening in financial conditions is warranted to support a return of inflation to target".

Kent said in August that "monetary policy in Australia is somewhat restrictive", explaining that "Monetary policy is considered 'restrictive' if financial conditions are restraining aggregate demand". The September minutes said financial conditions "remained somewhat restrictive", while noting the extent was uncertain.

Members also argued that the previous 4.35% cash rate might be less restrictive than two years earlier if the neutral rate had risen. Strong business investment and debt growth would be consistent with that possibility, although Kent has stressed that estimates of the neutral rate are highly uncertain.

Is business debt a stability concern?

The RBA has drawn a distinction between monetary policy and financial stability. The minutes said "financial stability considerations were not currently constraining the setting of monetary policy."

That said, the Board judged global risks more material than domestic cyclical risks, listing a global bond market adjustment, low risk premia in equity and credit markets, and AI-related debt accumulation. The October 2026 Financial Stability Review found the financial system has "a good degree of resilience", while noting global and operational vulnerabilities are growing. It said most businesses can absorb higher costs, though some sectors face tougher conditions, and that "Australian banks are well positioned to continue lending, even in a downturn."

Bullock acknowledged the impact on borrowers beyond households: "Now, I know this decision is difficult for households with a mortgage and businesses with loans".

What comes next

The Board has left the door open to further moves. The minutes said members would consider "increasing the cash rate target further if required", and the statement said "The Board will continue to do what it considers necessary to bring inflation sustainably back to target". Bullock declined to signal the path: "I'm not going to give you forward guidance."

The RBA's Financial Aggregates release, which will update the credit picture, is scheduled for 11.30 am on 30 October, though it may be delayed. September CPI is due on 28 October, and the next cash rate decision is scheduled for 2.30 pm on 3 November 2026.

The bottom line

The September rate rise was not only about households. While consumption slowed and housing credit fell, the Board noted strong growth in business investment and debt, with private business investment up more than 10% over the year and AI-related demand a recurring theme. In an economy the RBA sees as facing domestic capacity pressures and weak productivity, that business strength formed part of the case for tighter financial conditions.