PHOTO:  Kiwi Property Reports

New Zealand’s four biggest banks made a staggering:

💰 $6.5 BILLION profit in 2024

— more than the entire Deloitte Top 200 combined 💥

And with nearly all of those profits flowing back to Australian shareholders, growing numbers of Kiwis are questioning whether New Zealand’s banking system has become too powerful, too concentrated, and too heavily tied to the future of the housing market.

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The banks at the centre of the debate are:

🏦 ANZ Bank New Zealand
🏦 ASB Bank
🏦 Bank of New Zealand
🏦 Westpac New Zealand

Together, they now dominate approximately:

📊 90% of New Zealand’s banking market

and hold an estimated:

🏡 $393 billion in residential mortgages.

🇦🇺 MOST PROFITS LEAVING NEW ZEALAND

One of the biggest criticisms levelled at the banking sector is that all four major banks are Australian-owned.

That means billions of dollars in profits generated from:

✔ Kiwi mortgages
✔ Personal lending
✔ Business lending
✔ Credit card interest
✔ Banking fees

ultimately flow offshore as dividends to overseas shareholders.

Critics argue this creates a system where:

💸 New Zealand households carry the debt
while
💰 Australia receives much of the profit.

⚖️ COMMERCE COMMISSION’S “TWO-TIER OLIGOPOLY” WARNING

The concerns are not just political rhetoric.

New Zealand’s:

⚖️ Commerce Commission

previously delivered damning findings into the banking sector, describing the market as operating like a:

🚨 “Two-tier oligopoly.”

The Commission warned the market lacked strong competitive pressure, making it difficult for challenger banks to gain meaningful market share.

🏦 WHY KIWIBANK FAILED TO BECOME A TRUE CHALLENGER

For years, many hoped:

🏦 Kiwibank

would emerge as a genuine large-scale competitor capable of disrupting the major Australian-owned banks.

But despite strong public support and political backing, Kiwibank has struggled to significantly break the dominance of the big four.

Industry analysts say major barriers include:

❌ Scale
❌ Capital requirements
❌ Funding costs
❌ Technology investment
❌ Mortgage market concentration

📉 NZ’S ENTIRE HOUSING MARKET NOW TIED TO BANKING STABILITY

With nearly $400 billion in mortgages across New Zealand, the country’s economic future has become deeply tied to housing debt.

That creates enormous risk if:

📈 Interest rates rise
📉 House prices fall
💼 Unemployment increases
🏗 Construction activity weakens

because the banking system, property market and broader economy are now heavily interconnected.

🚨 MORTGAGE PRESSURE BUILDING AGAIN IN 2026

The debate comes as many Kiwi households face renewed mortgage stress in 2026.

Recent concerns include:

✔ Rising inflation expectations
✔ Higher-for-longer interest rates
✔ Flat or falling house prices
✔ Construction company collapses
✔ Slower property sales
✔ Reduced investor confidence

Many borrowers who fixed mortgages during lower-rate periods are now rolling on to significantly higher repayments.

🏗️ RECORD CONSTRUCTION INSOLVENCIES HITTING THE MARKET

At the same time, New Zealand’s building sector is facing growing financial pressure.

The market has seen rising numbers of:

🚨 Construction insolvencies
🚨 Developer failures
🚨 Delayed projects
🚨 Off-plan settlement stress

as weaker housing demand collides with elevated financing costs.

This is creating additional pressure on both homeowners and the banking sector itself.

📉 FALLING HOUSE PRICES NOW IMPACTING CONFIDENCE

After the massive Covid-era housing boom, many regions across New Zealand are still struggling to regain momentum.

Some areas — particularly Wellington — have experienced:

📉 Significant property value declines

while many homeowners remain trapped by:

❌ Negative equity
❌ Low buyer activity
❌ Tight household budgets

🧠 WHY THE BIG BANKS MATTER SO MUCH

Because the banking system is so concentrated, decisions made by just a handful of institutions now heavily influence:

🏡 House prices
🏗 Development activity
📈 Investor confidence
💰 Business lending
👨‍👩‍👧 Household spending

In many ways, critics argue the major banks now effectively help shape the direction of New Zealand’s entire economy.

🇳🇿 GROWING CALLS FOR MORE BANKING COMPETITION

The latest banking profit figures are likely to intensify calls for:

✔ Greater banking competition
✔ Stronger challenger banks
✔ More local ownership
✔ Banking reform
✔ Lower barriers to entry

Some commentators also believe New Zealand needs to reduce its extreme dependence on housing debt as the primary engine of economic growth.

👀 WHAT THIS MEANS FOR EVERYDAY KIWIS

Whether you:

🏡 Own a home
🏘 Rent a property
🏗 Build homes
💼 Run a business
📈 Invest in property

the banking system now impacts almost every part of financial life in New Zealand.

And with interest rates, affordability and economic uncertainty remaining major issues…

many experts believe the relationship between banks and housing will remain one of the country’s biggest economic debates for years to come.

🔥 THE BOTTOM LINE

New Zealand’s big four banks made $6.5 billion in profit while continuing to dominate nearly every corner of the country’s mortgage market.

💥 Australian-owned banks dominating NZ lending
💥 $393 billion in mortgages
💥 Housing market tied to banking stability
💥 Rising pressure on borrowers
💥 Growing calls for reform

And as mortgage stress, weak housing activity and economic uncertainty continue building…

🏦 More Kiwis are starting to ask who really controls New Zealand’s housing future.