Perth buyers have more choice and more negotiating power, but the latest interest-rate rise increases mortgage repayments. In a representative 20 per cent deposit, 30-year principal-and-interest model, a purchase price about 2.6 per cent lower roughly offsets a 0.25 percentage-point loan-rate rise in the monthly repayment. That is a useful break-even point, not a signal that every buyer should buy now.
Perth’s market has changed quickly.
The latest realestate.com.au Home Price Report says Perth home prices fell 0.3 per cent in September. That was the sixth consecutive monthly decline and left the index 4.2 per cent below its March peak.
At the same time, REIWA says Perth has shifted from a strong seller’s market to conditions that are much more favourable for buyers. It still describes the broader market as balanced rather than a buyer’s market, and conditions vary by suburb and property type. We have also been tracking what fewer buyers and more listings mean before you make an offer.
That distinction matters. The question is not whether a Perth headline says prices are down. It is whether the change in price and competition is enough to compensate an individual buyer for higher finance costs.
What changed after the latest rate rise
The RBA raised the cash-rate target by 0.25 percentage points to 4.60 per cent. CommBank, NAB, Westpac and ANZ have all since announced a full 0.25-point increase to variable home-loan rates.
That makes the repayment effect real rather than hypothetical for borrowers whose loan rate moves with those announcements.
ANZ gives a useful scale check. It says a 0.25-point rise increases repayments on a $500,000 owner-occupier variable principal-and-interest loan by about $79 a month. Your actual change will depend on your lender, rate, loan balance and remaining term.
But the property side of the equation has changed too.
REIWA’s latest weekly data show 7,804 properties for sale in Perth, 6.7 per cent more than four weeks earlier and almost 175 per cent more than a year earlier. REIWA also says the median selling time has more than doubled over six months and around one in two houses is now selling for slightly less than asking, compared with about one in ten earlier in the year.
That does not prove that every seller will accept a large discount. It does mean buyers have more room to compare, investigate and negotiate than they had at the height of the seller’s market.
The break-even number is about 2.6 per cent
To isolate the interaction between price and interest rate, Kixstart Property used the same basic finance assumptions REIWA recently used in its rent-versus-buy analysis: a 20 per cent deposit, a 30-year principal-and-interest mortgage and a 6.24 per cent starting variable rate. We then increased the rate by the confirmed 0.25 percentage points to 6.49 per cent. For the wider ownership-cost context, see our Perth rent-versus-buy analysis.
Under those assumptions, a purchase price about 2.59 per cent lower produces roughly the same monthly mortgage repayment after the rate rise.
For a $700,000 purchase, the original $560,000 loan is about $3,444 a month at 6.24 per cent. At 6.49 per cent, the same loan is about $3,536. A price around $681,900, about $18,100 lower, brings the modeled payment back to roughly $3,444.
For an $850,000 purchase, the modeled repayment rises from about $4,182 to $4,294 if the price does not change. A price around $828,000, about $22,000 lower, roughly cancels the repayment increase.
At REIWA’s current $965,000 rolling Perth house median, the model moves from about $4,748 a month to $4,874 if the price is unchanged. A price around $940,000, approximately $25,000 lower, brings the modeled payment back to about $4,748.
What if the price falls 2, 3 or 5 per cent?
At the $965,000 example, a 2 per cent lower purchase price is not quite enough. The modeled monthly payment at 6.49 per cent remains about $29 above the original payment.
At a 3 per cent lower purchase price, it moves to about $20 below the original payment.
At a 5 per cent lower purchase price, it is about $118 below the original payment.
That makes the practical threshold easier to understand. A quarter-point rate increase is material, but it does not require a dramatic property-price fall to offset the immediate monthly repayment effect.
Do not confuse a market index with your negotiating discount
There is an important trap here.
Perth’s current home-price index is 4.2 per cent below its peak, but that does not mean you should subtract 4.2 per cent from every asking price. The peak comparison describes the broader index. Your purchase decision concerns one property today.
REIWA’s rolling 12-month Perth house median is still $965,000. That measure and the current price index can point in different directions because they use different methods and time periods.
Use recent comparable sales, the property’s condition, time on market, competing stock, seller motivation and the strength of your offer terms. The market data tell you to negotiate. They do not tell you what discount a particular seller must accept.
A lower repayment is not the whole affordability test
The 2.6 per cent figure answers one narrow question: what purchase-price reduction roughly offsets a 0.25-point rate rise in the monthly mortgage repayment under the stated assumptions?
It does not answer whether a lender will approve the loan. Higher rates can reduce assessed borrowing capacity. It also excludes stamp duty, settlement costs, rates, insurance, maintenance, strata costs where relevant, future rate moves and the value of keeping a cash reserve.
That is why this analysis should sit beside, rather than replace, Kixstart Property’s borrowing-capacity and rent-versus-buy work.
What should a Perth buyer do with this?
First, get the finance refreshed. Use the actual post-rise rate and lender assessment rather than an old pre-approval.
Second, set a property-specific value range from recent comparable sales. Do not negotiate from the asking price alone.
Third, compare the likely saving with the higher repayment. In this model, a reduction beyond about 2.6 per cent starts to outweigh the quarter-point rate rise on the monthly mortgage payment.
Fourth, keep the wider budget intact. A deal is not better if the lower price still leaves the household stretched or wipes out the reserve needed for ownership costs and repairs.
The bottom line
Perth buyers are facing two forces at once. Finance has become more expensive, while market conditions have become more negotiable.
The latest rate rise does not automatically erase the benefit of a lower purchase price. Under the assumptions tested here, the monthly repayment break-even is about a 2.6 per cent price reduction.
That is useful because Perth’s market is now giving buyers more opportunities to test price. The decision still belongs at property level: what is this home worth, what will the lender actually approve, and what payment can the household comfortably carry?
If you are looking at a Perth property and want to pressure-test the asking price against recent sales, likely renovation work and the financing assumptions behind your offer, Kixstart Property can help you structure the property side of that review before you commit.
This article provides general information only. It is not real estate, valuation, development, building, planning, legal, taxation, financial, credit or investment advice. Loan rates, lender policies, market conditions and individual circumstances vary. Obtain advice appropriate to the property, finance and circumstances before acting.