Every RBA decision day, property investors watch the cash rate announcement, do quick mental maths on monthly repayments, and ask: "How does this end up in rents?" The honest answer is that the path is longer and noisier than the headlines make it look. Here's the chain, with the 2024-2026 cycle as a case study.

Step 1: RBA decision → variable-rate mortgages

When the cash rate moves, banks reprice variable-rate mortgages within 1-3 weeks. The pass-through is rarely 100%. In the November 2024 cut, the major banks passed through 20-22 basis points of the 25-basis-point cut on average , and they did it slowly. In the March 2026 cut, pass-through was nearer the full 25 basis points, faster, because of competitive pressure on owner-occupier lending.

For a $750,000 investor loan on variable rate, a 25-basis-point cut saves around $115/month. Over a year that's $1,380 , material, but not transformative.

Step 2: Mortgage cost → investor decision making

The key question is whether the change in mortgage cost shifts investor behaviour. The data from the last two cycles is clear: rate cuts encourage holding and acquiring; rate hikes encourage selling at the margin.

CoreLogic's 2024-2025 data shows investor listings rose 14% during the rate-hike phase and fell 9% during the cut phase. Each investor who sells removes a rental property from the market.

Step 3: Investor decision → rental supply

This is where the mechanics get interesting. When investors sell, the property often gets bought by an owner-occupier. That's one rental property gone from the market and one fewer renter household needing a property. Net effect on vacancy: usually neutral.

But when investors *can't* sell (illiquid market, capital-loss territory), they hold. And held investments need tenants. Supply stays steady, but the investor has less motivation to drop rent to fill a vacancy quickly , the holding cost has gone up.

Step 4: Supply tension → rent pricing

Rents are not set by the macro market , they're set by what the next tenant will sign for, at the inspection, this week.

If your local vacancy rate is below 1.5%, you have meaningful pricing power and a rate cut barely affects your ability to push rents.

If vacancy is between 1.5% and 3%, you're in a balanced market and most rent changes follow CPI / wage growth, not the cash rate.

If vacancy is above 3%, rate movements affect you mainly through your own holding cost, not your tenant's willingness to pay more.

What this means for your strategy

When rates are being cut (current environment, mid-2026)

  • If you're at maximum borrowing capacity: you've just gained a small margin. Use it to build buffer, not chase yield.
  • If you have spare capacity: cuts make acquisitions more affordable. The middle ring of Melbourne and the growth corridors of Brisbane look strongest on a rent-growth-vs-purchase-price basis right now.
  • Don't reduce rent based on the cut. Your tenant didn't get a pay cut.

When rates are being held (the longer pattern)

  • Focus on tenant retention. The cost of a four-week vacancy is the equivalent of three years of $20/week rent increases. Lease renewal at flat rent often beats a chase for the headline new market rent.

When rates are being raised (looking ahead, 2027+)

  • Audit your loan structure now. The fixed-vs-variable balance you choose today is locking in your exposure to the next cycle.
  • Re-check your rent against the local market quarterly, not annually. In a tightening rate environment, the difference between "asking rent" and "achievable rent" widens fast.

The bottom line

The cash rate matters less than your local vacancy rate. Your local vacancy rate matters less than how quickly you can re-lease. And how quickly you can re-lease depends on how well your property is presented, priced, and represented , which is exactly what a Portfolio Manager exists to optimise.

If you'd like a review of where your rent sits versus the achievable rent in your suburb right now, we'll run that analysis at no charge.