Three Markets, One Downturn: What's Driving Falling Prices in AU, NZ & UK

The property corrections in Australia, New Zealand and the UK look superficially similar: prices sliding, transaction volumes thin, sellers holding out for last year’s numbers. But the mechanics differ enough that a strategy which protects your position in Auckland could sink you in Manchester. Here is what is actually moving each market.

Australia: Serviceability, Not Oversupply

Australia’s softness is a rate story, not a supply story. The RBA cash rate sat at 4.35% through most of 2024 before cuts began in 2025, and the serviceability buffer under APRA’s guidance still adds 3 percentage points to the assessed rate. That means a borrower being assessed at roughly 9% on a 6% mortgage is borrowing meaningfully less than the sticker rate implies.

The result is a market where prices in Sydney and Melbourne drifted lower while Perth and Brisbane held firmer, driven by interstate migration and comparatively cheaper entry points. National figures mask this. A 2% CoreLogic decline nationally can hide a 6% fall in a specific Melbourne postcode and a 4% gain in a Brisbane one.

For investors, the pressure point is DSCR. If your portfolio was underwritten at a 5.5% rate and your fixed terms are rolling off onto a 6.3% variable, the coverage ratio that looked comfortable at purchase may now be under 1.2. That is the number to watch, not the headline index. Negative gearing offsets some of the pain against other income, but it does not fix a cash flow shortfall that hits monthly.

New Zealand: The Hangover From a Bigger Party

New Zealand ran harder and fell harder. Prices roughly doubled between 2015 and the late 2021 peak, then dropped around 18% from that peak nationally, with Auckland worse. The correction here was amplified by three specific policy levers that Australia and the UK did not pull in the same way.

First, the removal of interest deductibility on residential investment property, phased in from 2021, then reversed by the incoming government and restored to full deductibility from the 2025/26 tax year. Investors who bought during the non-deductible window did their sums on very different after-tax cash flow than investors buying now.

Second, the brightline test, effectively a CGT proxy on residential property, which was extended to 10 years and then cut back to 2 years from July 2024. If you are modelling a holding period, the disposal date now matters far less than it did 18 months ago.

Third, the OCR peaked at 5.5% and stayed there longer than many expected before easing began. For a market this leveraged, that duration mattered more than the peak itself.

United Kingdom: Regional Divergence and the Section 24 Legacy

The UK is not really one market. London has been flat to falling in real terms for years while the North West and parts of Scotland kept climbing. The correction bites hardest where affordability was already stretched against local wages.

The distinctive UK drag is Section 24, which since 2020 has restricted mortgage interest relief for individual landlords to a basic-rate 20% tax credit rather than a full deduction against rental income. A higher-rate landlord with a heavily mortgaged property can now be taxed on rental profit that does not exist in cash terms. As rates rose, this pushed a wave of stock into limited company (SPV) structures and pushed some highly geared individuals to sell.

Stamp duty also shifted: the 3% surcharge on additional dwellings became 5% from October 2024, adding real cost to any new acquisition.

What This Means Across a Multi-Country Portfolio

If you hold in more than one of these markets, the trap is applying a single mental model. A GBP mortgage taxed under Section 24 behaves nothing like an AUD loan with a franking-adjacent negative gearing benefit, and both differ from a NZ position where deductibility just came back.

Currency compounds this. A UK property that fell 4% in GBP may have fallen 9% for an investor measuring in AUD once the exchange rate moved. You cannot see that in a single-currency spreadsheet.

This is exactly the situation Property Insights is built for: tracking each property in its local currency, modelling the actual after-tax cash flow under each jurisdiction’s rules, and watching consolidated LVR and DSCR move as rates and valuations shift rather than discovering the problem at refinance.

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