The politics of 2026

Is New Zealand’s Rising Tax Burden a Temporary Aberration — or the New Normal?

2026 will be an interesting year for New Zealand. Not because the fiscal pressures we face will suddenly appear, but because a general election will force politicians — and voters — to confront choices that have been building for decades.

Is the steady rise in New Zealand’s tax burden simply the product of a tax-and-spend government? Or does it reflect deeper, structural forces that no government can easily escape? To put it more bluntly: will New Zealand ever see significant tax cuts again?

To answer that, it helps to zoom out and take a long-term view.

Measured as a share of GDP, New Zealand’s tax burden has fluctuated over time. It fell through much of the post-war era, rose during the expansion of the welfare state in the 1960s and 1970s, and peaked in the mid-1980s amid a fiscal crisis that triggered sweeping reform. The tax and economic changes of the late 1980s and early 1990s — including a broad-based GST and lower marginal income tax rates — drove the tax take down to a low point in the early 1990s.

Since then, the trend has mostly been upwards. Governments of both the left and the right have struggled to deliver sustained reductions in the overall tax burden. Periods of restraint have been followed by renewed upward pressure, leaving the tax-to-GDP ratio today close to levels seen decades ago.

The pandemic accelerated this pattern. Net core Crown debt rose sharply, and even as it stabilises, higher interest rates mean debt servicing now absorbs a permanently larger share of public revenue. That alone constrains future tax cuts.
But debt is not the main story.

Demographics Are the Real Driver

The deeper challenge is demographic — and it will dominate the 2026 election debate, whether politicians like it or not.
New Zealand’s population is ageing rapidly. Around one in six New Zealanders is now aged 65 or over. Within two decades, that figure is expected to approach one in four. The number of people aged over 85 — the group with the highest healthcare costs — will rise even faster.

This has profound fiscal consequences.

New Zealand Superannuation is universal, wage-indexed, and politically sacrosanct. As the retired population grows relative to the working-age population, the cost of maintaining this promise rises inexorably. Even without increasing generosity, simply preserving current settings will require a growing share of national income.

Health spending tells the same story. Older New Zealanders consume far more healthcare than younger cohorts, and as retirees make up a larger proportion of the population, public health spending as a percentage of GDP will rise. This is not a temporary spike caused by COVID-19; it is a structural shift baked into our demographic future.

Fewer workers, more retirees, higher spending — the arithmetic is unavoidable. Unless eligibility ages rise sharply or entitlements are cut, higher taxes become the default solution.

The Politics of 2026

This is where the 2026 election becomes pivotal.

Parties of the left are unlikely to campaign on cutting taxes overall. They may promise fairness, investment, and improved public services, but they will openly or implicitly accept a higher tax burden as the price.

What about parties of the right? They will almost certainly promise tax cuts. Some targeted relief is plausible. But meaningful, broad-based reductions are much harder to deliver.

Any centre-right government will rely heavily on older voters — the same voters most dependent on superannuation and public healthcare. Cutting the spending that drives long-term fiscal pressure would mean confronting its own electoral base. That is a difficult, perhaps impossible, political calculation.

Using economic growth to fund tax cuts sounds attractive, but New Zealand’s productivity performance over the past 15 years has been weak. Without major reforms to planning, infrastructure, energy, and labour markets, growth alone is unlikely to generate enough fiscal headroom to materially reduce taxes.

Reform or Drift?

If significant tax cuts are ever to return, they will not come from tinkering at the edges. They would require structural reform — a rebalancing of how New Zealand raises revenue and how it funds long-term commitments like superannuation and healthcare.

New Zealand already has one of the world’s most efficient consumption taxes in GST. Further reform could reduce reliance on distortionary taxes, simplify income taxes, and create a system more supportive of growth. But such reforms come with political risks, especially when short-term distributional impacts dominate public debate.

The Uncomfortable Conclusion

The hard truth is that New Zealand’s rising tax burden looks less like a temporary aberration and more like the new normal.

An ageing population, universal superannuation, rising health costs, and higher debt servicing all point in the same direction. The 2026 election will not create these pressures — but it will force voters to decide how honestly they want politicians to confront them.

The real question is no longer whether taxes will rise, but whether New Zealand can design a tax system that raises the revenue it needs while doing the least possible harm to growth, opportunity, and intergenerational fairness.
 


Disclaimer:  This newsletter is meant to be informative and engaging, hopefully not a cure for insomnia.  Please don’t take this as personalised financial advice.  Discuss your situation with an Advisor.  This is where I need to say past returns are no guarantee of future returns.