New Zealand Households Owe $370 Billion. Most of It Is Mortgage Debt. Here Is Why That Number Matters.

New Zealand has one of the most indebted household sectors in the developed world. The numbers that came out of the Reserve Bank of New Zealand's May 2026 Financial Stability Report put the situation in sharp relief. New Zealand households collectively owe over $370 billion in debt, approximately $70,000 per person or $170,000 per household, with almost all of it being mortgage debt on residential property.

That debt-to-income ratio of around 170% is one of the highest in the OECD. For comparison, it sits well above Australia's already elevated household debt levels, and the structure of New Zealand mortgages makes it particularly sensitive to interest rate movements. Unlike Australia or the UK where many borrowers lock in longer fixed terms, the majority of New Zealand mortgages are on short fixed terms of one to two years, meaning borrowers reprice frequently as rates change.

Lower official cash rates are still easing servicing costs on housing debt, but the cushion is now thinner because wholesale rates have risen on the Middle East news. The unemployment rate ticked back to 5.3% in the March quarter and wage growth has slowed to a five-year low, which the Reserve Bank flagged as a constraint on how quickly mortgage stress can ease for borrowers who came off ultra-low fixed rates last year.

The broader context is that New Zealand's economic recovery had genuinely started before the Middle East conflict disrupted the picture. Lower interest rates in 2025 were supporting demand, and fewer borrowers were missing payments heading into this year. The energy shock has not reversed that trajectory completely, but it has slowed it.

The RBNZ's May 2026 Financial Stability Report noted that higher oil prices and broader economic impacts driven by elevated uncertainty can affect the ability of households and businesses to service debt, with transport, parts of the primary sector and chemical manufacturing being the most immediately impacted sectors.

For New Zealanders with mortgages coming up for renewal in the next twelve months, the message from the central bank is clear: the recovery is still happening, but the buffer is thinner than it looked six months ago.