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Australia’s Inflation Test

Why the Reserve Bank of Australia faced a difficult rate decision, and what the subsequent move tells us about currency, banks and households.

Sent 12 September 2026●4 min read

The decision in context

As of 12 September, the question was whether persistent inflation would push the Reserve Bank of Australia to lift its cash rate from 4.35%. A rate decision is a response to a changing economy; it is not, by itself, an investment thesis.

For Australia, the key question was whether inflation pressure would last long enough to outweigh the drag from higher borrowing costs.

The RBA’s earlier statements emphasised that the path for inflation and the labour market remained uncertain. That matters in a country where variable-rate mortgages transmit policy changes to households relatively quickly.

4.35%Cash rate before
29 September
+25bpRBA decision
29 September
4.60%New cash-rate target
29 September

Source: Reserve Bank of Australia. This decision occurred after the newsletter was sent.

29 September update

Subsequent event: On 29 September, the RBA raised the cash-rate target by 25 basis points to 4.60%. The earlier case for a possible hike is now historical context, not a pending forecast.

The move confirmed that the Board judged inflation risks serious enough to tighten further. It did not settle how long rates would stay there, or whether the economy would slow more than expected. Those are separate questions for the next data releases.

How the hike travels

HouseholdsVariable-rate borrowers face higher repayments; the effect depends on how quickly lenders reprice loans.
CurrencyA higher Australian rate can support the dollar, but global risk appetite and commodity prices also matter.
BanksMargins may initially benefit, while weaker credit demand and arrears can offset that benefit.
EquitiesValuations face pressure if bond yields rise; company earnings may move differently across sectors.

The temptation is to label the hike “good” or “bad” for the ASX. Its effects are less uniform. Exporters, importers, lenders and domestically focused businesses have different sensitivities to the Australian dollar, financing costs and consumer spending.

What to watch next

Core inflation, wage growth, retail volumes and mortgage arrears will show whether the tightening is cooling demand without breaking it. We would also watch the RBA’s language on the balance between inflation and employment. A weaker currency could complicate the inflation fight; a sharp slowdown in spending would change the risk in the other direction.

The September hike resolved one question. The more consequential one is how much demand must slow before inflation becomes durable enough for rates to stabilise.

Sources and method

  1. Reserve Bank of Australia, 29 September 2026 monetary policy decision
  2. Reserve Bank of Australia, monetary policy decisions archive

This article provides general information only and is not personal financial advice. It does not consider your objectives, financial situation or needs. Nothing here is an offer or recommendation to buy or sell a financial product. Investing involves risk, including possible loss of capital.

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