The Reserve Bank lifted the cash rate to 4.35% yesterday in an 8–1 vote, and within hours all four major banks confirmed full pass-through to variable home loan customers from 15 May. Macquarie followed with a 22 May effective date. For brokers, that creates a narrow operational window: roughly nine days for the Big Four book and just over two weeks for Macquarie clients to act before higher repayments land. The window matters less because of the 25 basis points themselves and more because of what just happened to the forecast picture — CBA, NAB, ANZ and Westpac no longer agree on where this cycle ends.

What just happened

The Monetary Policy Board lifted the cash rate target by 25 basis points to 4.35% on 5 May, the third consecutive hike of 2026. The vote was 8–1, with one member voting to hold at 4.10%. That is a sharper hawkish shift than the 5–4 split at the March meeting, and it tells the market the Board has lost patience with sticky inflation.

In her post-decision statement, Governor Michele Bullock pointed to second-round effects from cost pressures becoming “embedded” in price and wage-setting, and described the current rate as “a bit restrictive” — a phrase that gives the Board room to pause without committing to one. The RBA’s updated forecasts pencil in headline inflation peaking at 4.8% in mid-2026 and underlying inflation staying above 3% until mid-2027. The Bank’s own technical assumption now has the cash rate rising to 4.7% by the end of 2026.

Reporting from Savings.com.au confirms CBA, NAB, Westpac and ANZ all moved within hours, lifting variable home loan rates by 0.25% with an effective date of 15 May 2026. Macquarie passed through 0.25% with an effective date of 22 May.

The forecast split brokers need to read

The more interesting story for the broker channel is what the Big Four are now telling their own economics desks — and they are not telling them the same thing.

  • CBA and ANZ are calling 4.35% the likely peak for this cycle, expecting the Board to hold for the rest of 2026.
  • NAB agrees this is the peak but expects the rate to stay at 4.35% at least until mid-2027 — a longer plateau than CBA or ANZ are forecasting.
  • Westpac is the outlier, pencilling in two more 25 basis point hikes in June and August, taking the rate to 4.85%.
  • The RBA’s own forecast assumption sits at 4.7% by end-2026, sitting closer to Westpac’s view than the rest of the Big Four.

That divergence is unusual. For most of the past two cycles, the Big Four have clustered within 25 to 50 basis points of each other on terminal-rate calls. Today they are spread across a 50 basis point range, with NAB and Westpac essentially modelling different macroeconomic environments.

Why this matters for client conversations this week

The forecast split is not an academic problem. It directly changes the maths a broker presents when a client asks the question every broker is about to hear: should I fix?

If you anchor your client conversation to CBA’s peak-and-pause view, fixing now looks expensive — you’d be locking in the cycle high. If you anchor to Westpac’s call, fixing now looks defensive and prudent — you’d be hedging two more hikes. Neither view is “right” in any meaningful sense; both are reasonable inferences from the same data set.

The Best Interest Duty doesn’t require brokers to pick the winning forecast. It requires the recommendation to be defensible against a credible alternative scenario. That means the file note has to capture which macro view you discussed with the client, why that view aligned with their cash flow tolerance, and what would prompt a review. With the Big Four genuinely split, “the bank says rates have peaked” is no longer a complete answer — because another bank, on the same day, is forecasting two more hikes.

The 9-day triage window: what to do this week

For brokers managing an active variable book, the period between today and 15 May is the last cheap window before repayments tick up. A practical triage sequence:

1. Identify your stress quintile. Run a list of clients whose original servicing buffer was thin or whose income has changed since application. A 25 basis point move on a $750,000 loan adds roughly $115–$130 a month, depending on remaining term. For clients already running close to debt-to-income limits, this is the hike that pushes them into hardship territory.

2. Refinance candidates first, repricing requests second. The strongest pricing leverage right now sits with brokers who can credibly threaten to move the loan, not just request a discount. Refinancing applications submitted this week will, in many cases, be assessed at the pre-15-May rate environment depending on lender turnaround and policy.

3. Run the fixed conversation, properly. If a client asks about fixing, walk them through the genuine forecast spread — CBA peak, NAB long-plateau, Westpac more hikes — rather than reciting a single house view. Make the file note reflect the full conversation. Brokers who take the trouble to document the divergence are protecting themselves against a hindsight complaint if the cycle resolves differently to whichever view the client ultimately chose.

4. Flag your trail book before the lenders do. Every retention team at the Big Four is already preparing pre-emptive discount campaigns for the post-15-May complaint surge. If you wait for your client to receive the lender’s “here’s your new repayment” letter and a counter-offer the next day, you’re reactive. Brokers running outbound calls this week, before the rate change lands, are competing on relationship rather than price.

The compliance angle

ASIC has been clear in recent guidance that BID is not a static obligation — it travels with the broker through changing market conditions. A recommendation that was demonstrably in the client’s best interest in February, on an unhedged variable, may need to be revisited after a third consecutive hike has materially shifted the affordability picture.

That doesn’t mean every variable-rate client needs to fix or refinance. It means the file should show the broker considered the changed environment and either documented why no change was warranted or offered the client options. Aggregator audit teams are increasingly looking for this evidence of ongoing monitoring, particularly where clients have raised hardship indicators since the loan was written.

What to watch next

The June Monetary Policy Board meeting is now the most important date on the broker calendar. If the Board pauses, CBA, NAB and ANZ will be vindicated and the refinancing surge that Herron Todd White and others have flagged is likely to peak through Q3. If the Board hikes again, Westpac’s call moves into the consensus and the conversation shifts from refinancing to genuine hardship management.

The other variable to watch is non-bank lender pricing. Several non-bank specialists are still digesting the cash rate move and have not yet announced pass-through. Brokers with prime clients who can clear non-bank servicing have a short window where price differentials may be temporarily widened before non-banks reset.

The takeaway

The 25 basis points are not the news. The news is that the Big Four no longer agree on where this cycle ends, the RBA’s own forecast sits at the hawkish end of that range, and brokers have between 9 and 17 days before repayments shift before they need to have run a meaningful conversation with every client whose file is at risk. The brokers who treat this as a triage week, not a watching-the-rate-curve week, will write the difference.

Disclaimer: This article is for general information and professional development purposes only. It does not constitute legal, compliance, or financial advice. Brokers should consult their aggregator’s compliance team and, where required, seek independent legal advice regarding their obligations under the National Consumer Credit Protection Act 2009 and ASIC’s responsible lending guidelines.