The Reserve Bank has confirmed what households feared most. In its March meeting, the RBA raised the cash rate by 25 basis points to 4.10 per cent, adding fresh pressure to mortgage holders already stretched thin by cost-of-living pressures.
For a typical borrower with a $600,000 mortgage and 25 years remaining, the maths are unforgiving. According to financial analysis by Canstar, today's hike will add approximately $91 to monthly repayments. Combined with February's 25-basis-point rise, borrowers are now facing $181 in extra monthly costs compared to the start of 2026. For those with a $1 million mortgage, the pain scales sharply: $151 per month from this decision alone, or $301 when combined with February's hike.
The decision puts the RBA on a path most households dread. The Big Four banks—Commonwealth Bank, Westpac, NAB, and ANZ—now forecast another 25-basis-point increase in May, which would push the cash rate to 4.35 per cent. If that materialises, it marks the first time the RBA has hiked at three consecutive board meetings since March 2023. For a $1 million mortgage holder, back-to-back hikes would mean handing over an extra $317 a month once both take effect.
Why now? The inflation problem
The RBA's rationale centres on inflation that refuses to retreat. According to the Reserve Bank, underlying inflation is running at 3.4 per cent, well above the 2-3 per cent target. That spike has been made worse by geopolitical shocks. The war in the Middle East has sent oil prices soaring past US$100 a barrel, creating a fresh inflation shock just as the RBA thought it had momentum on its side.
Commonwealth Bank head of Australian economics Belinda Allen articulated the RBA's dilemma clearly: inflation remains stubborn despite earlier rate cuts, and the economy continues to run stronger than the RBA's speed limit. Global tensions add uncertainty, but domestic economic strength is likely to drive the board's hand. The labour market remains tight, with unemployment sitting at 4.1 per cent.
But there's a genuine counterargument
Not everyone agrees the hike was justified. Michael Dockery, leading labour economist from the Bankwest Curtin Economics Centre, argued the RBA may have acted too hastily. The oil price spike is an external shock with nothing to do with domestic demand, he noted. With an economic downturn becoming a real risk, hiking rates compounds household pain just months after February's rise.
The data back up this concern. Mortgage stress is rising across Australia's major capital cities. Domain research shows all capital cities are now in mortgage stress for entry-level houses, and Sydney, Brisbane and Adelaide face mortgage stress even for unit purchases. First-time buyers face particular pressure, especially those who entered the market with minimal equity and are now exposed to rate moves that were unimaginable when they borrowed.
Some experts in the Finder survey argued the RBA should have held firm and waited for global conditions to stabilise. The decision, they argued, risks turning a supply shock—something the RBA cannot control—into demand destruction.
The path ahead: rate hold or hike frenzy?
The question now is whether the May hike materialises as the banks predict. This depends heavily on inflation data and what the RBA learns about how today's hike works through the economy. If inflation responds quickly and global energy costs settle, the case for a May hike weakens. If prices remain sticky, the RBA faces pressure to keep tightening even as household spending shows signs of strain.
For borrowers, the mathematics offer little comfort. Every basis point adds up. The challenge is that the RBA cannot easily distinguish between inflation caused by external shocks (oil prices) and inflation driven by domestic demand. Until inflation clearly heads toward target, the RBA will lean toward tightening. The pain of rising mortgage repayments may be the price of that uncertainty.