Wealth Tax Explained: Will You Have to Pay?

New Zealand does not have a wealth tax. But the idea keeps surfacing, and with a general election on 7 November 2026, it is back in the headlines. Before deciding what to think about any proposed tax, it pays to understand how a wealth tax would work, who it might affect, and why it remains so contentious.

Is New Zealand getting a wealth tax?

On the policies announced so far, you would pay a wealth tax only if your net assets outside your home exceed $10 million under the Green Party's proposal, or if your net wealth exceeds $2 million under Te Pāti Māori's. Te Pāti Māori has yet to say whether the family home counts. Even then, one of those parties would need to secure its policy in post-election negotiations. Labour's own policy is a capital gains tax on investment property. The National-led government has pledged no new taxes.

Any wealth tax would require new primary legislation, new valuation and disclosure powers for Inland Revenue, and a workable enforcement framework covering trusts, private business interests, and illiquid assets. None of this exists in the current statute book. To be implemented, a wealth tax in the next parliamentary term would need Labour to accept a policy it has so far left to its partners, so it is improbable rather than impossible. Over 10 to 20 years, an ageing population and the strain on government finances may revive broader capital tax debates, but the form any new tax takes is far from settled.

What is a wealth tax?

A wealth tax is a form of taxation based on a person's total net worth, not their income. If you have $2 million in assets and $500,000 in debt, your net worth is $1.5 million. Therefore, a wealth tax would be levied on $1.5 million. A wealth tax charges a percentage of that figure every year, usually only on the part above a threshold. If the threshold was $1 million and the tax rate 1 percent, the same person would pay 1 percent of the $500,000 above the line, or $5,000 a year. The bill rises as they grow wealthier and falls if their net worth drops.

Unlike income tax or capital gains tax, people with sufficient net worth would owe wealth taxes even without taking any action. That means there is tax to pay despite no income earned, and no assets sold. The tax applies simply because the wealth exists.

How would a wealth tax work in New Zealand?

Think of council rates. Homeowners pay an annual sum based on the assessed value of their property. A wealth tax would apply the same principle across all asset types: real estate, cash, investments, KiwiSaver balances, business interests, and other assets, less any debts owed. Unlike rates, it would look across everything a person owns and owes, including assets with no live market price to look up.

A government could choose to exempt certain asset types. Business assets, or small businesses, might be excluded to encourage entrepreneurship. KiwiSaver balances might be carved out to encourage long-term saving. Family homes might be exempt below a threshold. The design choices are political, and they determine who pays.

Most proposals include a threshold. The Green Party's 2026 policy proposes 2.5 percent a year on an individual's net assets above $10 million, with the family home exempt. Te Pāti Māori's version starts lower, at 1.5 percent on an individual's net wealth between $2 million and $5 million, rising to 2 percent up to $10 million and 2.5 percent above it.

Would you pay?

Take a couple with a mortgage-free $4 million home and $2.5 million in investments. Under the Green proposal they pay nothing: the home is exempt and the investments sit well under $10 million. Under Te Pāti Māori's bands, the result depends on who owns what. Split evenly, each partner holds $1.25 million and neither crosses the $2 million line. Held in one name, the $500,000 above the line attracts 1.5 percent, or $7,500 a year. Whether the family home counts under that proposal is one of several details the published summary leaves unexplained. If it did, and the couple owned everything equally, each partner would hold $3.25 million and pay 1.5 percent on $1.25 million, or $18,750 a year each.

Now take a founder whose company might be valued at around $12 million, who draws a modest salary and owns a $1 million home. Under the Green proposal the $2 million above the threshold attracts 2.5 percent, or $50,000 a year, from a business which may pay no dividend at all. On Te Pāti Māori's bands, leaving the home aside, the same founder faces 1.5 percent on $3 million, 2 percent on the next $5 million and 2.5 percent on the final $2 million, which comes to $195,000 a year. A private company has no ready way to determine a share price (unlike publicly traded shares in large corporations), so the first argument each year would be over what the business is worth. Holding the shares in a trust would not remove the liability under the Green plan, which attributes trust assets to the settlor or the beneficiaries. In a New Zealand context, this is where the biggest practical distortion would appear: in owner-managed companies. Paper wealth there often far exceeds distributable income, and there is no market to sell a slice into when the bill arrives.

Advantages of a wealth tax

Additional government revenue

More tax revenue could fund healthcare, infrastructure, and help reduce government debt. Treasury's 2025 Long-term Fiscal Statement projects government debt reaching 200 percent of GDP by 2065 if spending and revenue settings stay as they are. The figure projects the path rather than forecasting what any government will allow. Net core Crown debt has already risen from under 19 percent of GDP in 2018/19 to around 42 percent. Those numbers create pressure for either spending restraint or a broader tax base, regardless of which party holds office. The Greens estimate their wealth tax would raise $3.7 billion to $4.1 billion a year; what arrives would depend on valuations, avoidance and who stays, the problems Inland Revenue's own briefing dwells on.

Perceived fairness

To many, there is something unsettling about people with substantial wealth who pay comparatively little in tax. Inland Revenue's research into 311 of the country's wealthiest families put their median effective tax rate at 9.4 percent, against 20.2 percent for a middle-wealth New Zealander. The comparison counts unrealised gains in property, shares and businesses as income, so it measures wealth which has grown rather than cash which has been banked. It says more about what the tax system leaves untaxed than about anyone paying less than the law requires. Even so, figures like these create political momentum.

Disadvantages and potential issues

Lack of cash to pay it

One persistent problem with wealth taxes is liquidity. Wealth on paper is not cash in hand. To pay the tax, a person or couple might have to sell assets, which creates forced transactions at potentially unfavourable times. Inland Revenue's 2026 Long-term Insights Briefing makes the same point, and notes France's attempt to cap the liability at 75 percent of a taxpayer's income only increased the scope for avoidance.

The tax lands hardest on people with assets and no cash, and it can catch people nobody intends to disadvantage. Under any version which counted the family home, an elderly widow in Auckland who owns hers outright would look wealthy on paper, yet might not have the available cash to pay an annual wealth tax. The gap between wealth held in property and wealth you can use is far wider than most people assume.

Loopholes and avoidance

Most taxes of this nature come with exemptions, and people who are truly wealthy will respond by paying an accountant to exploit every available gap. Complex offshore structures, trust arrangements, and asset reclassification become more attractive under a wealth tax. The cost of compliance and avoidance behaviour can offset much of the expected revenue. Even moving overseas becomes a more viable option.

Capital flight and international experience

France introduced a wealth tax in 1982. One estimate, reported from the business daily Les Echos, put the number of millionaires who left the country between 2000 and 2012 at 42,000, though how much of that movement the tax caused is disputed. France abolished the tax in 2018 and now taxes only real estate.

The picture elsewhere is more mixed. Norway keeps a wealth tax of 1 percent on net wealth above NOK 1.9 million per person, rising to 1.1 percent above NOK 21.5 million, with broad disclosure requirements. The headline rate overstates the bite, because homes and shares are valued at a discount for the purpose, which is why two countries with the same nominal rate can tax the same person very differently. It raises meaningful revenue, but it also moves people. A 2025 study of Scandinavian tax records found each percentage point added to the top wealth tax rate shrinks the number of wealthy taxpayers by about 2 percent. A large share of those who leave are business owners, and their firms suffer once they have gone. Switzerland levies wealth taxes at the cantonal level, with rates varying significantly by location. Its system is often cited as functional, though it operates within a very different federal structure. Spain reintroduced a solidarity tax on large fortunes in 2022 after abolishing its earlier version, and the debate continues.

The common thread across jurisdictions is this: design matters enormously. A poorly designed wealth tax drives capital flight and avoidance. A well-designed one can raise revenue, but at administrative cost and with ongoing political friction.

Meanwhile, the countries with no wealth tax at all are collecting the people who leave. Henley & Partners projected a record 142,000 millionaires would move country in 2025. The United Arab Emirates was expected to take a net 9,800, Saudi Arabia 2,400 and Singapore 1,600, while the United Kingdom, which had just scrapped its non-domicile regime, lost a net 16,500. The same firm's 2026 ranking of how well countries compete for mobile wealth put New Zealand third in the world, behind only the United Arab Emirates and Singapore. A country with no general capital gains tax, no inheritance tax and no wealth tax is an easy place to arrive and a hard one to justify leaving. A wealth tax would trade that position away.

Inland Revenue's own briefing rates it a reasonable risk that a wealth tax would make very wealthy residents more likely to emigrate and very wealthy newcomers less likely to arrive. Budding entrepreneurs in New Zealand's tech sector, realising future success would be taxed every year it sat on paper, would have an obvious reason to build their companies in Australia, which has no wealth tax.

Administration

A wealth tax requires calculating a person's entire net worth each year. While some assets have a clear market value (such as cash, and publicly traded shares), most do not. Some others, such as a residential property, orchard, or farm, can be roughly valued by a formula or algorithm, though this is open to debate, too. Other assets are notoriously hard to value, such as privately held businesses, artwork, collectibles, and minority stakes in small and medium unlisted companies. Inland Revenue would need new valuation powers, annual disclosure requirements, and expanded dispute resolution frameworks to administer a wealth tax effectively. The burden on both the IRD and taxpayers would be substantial.

There is also the question of what happens when asset values fall. If a property and share market crash drops portfolio values significantly, would the government refund last year's wealth taxes?

Where do the parties stand?

National has pledged no new taxes, which rules out a wealth tax, a capital gains tax and an inheritance tax.

Labour has chosen a narrower path: a 28 percent capital gains tax on profit from selling investment property, residential and commercial, from 1 July 2027. The family home, farms, KiwiSaver balances, shares, businesses and inheritances are excluded, and gains are measured from an opening valuation at the start date rather than from the original purchase. Labour's tax would replace the current bright-line test, which currently applies a two-year holding period. Labour's policy carries no wealth tax and leaves inheritances untaxed.

The Green Party's 2026 plan is the 2.5 percent wealth tax above $10 million described above. It is paired with a 33 percent tax on gifts and inheritances received above $1 million, a 45 percent top income tax rate above $160,000, and a higher company tax rate for large companies. The threshold is five times the $2 million the party took into the 2023 election, and the party says the higher figure makes clear who pays.

Te Pāti Māori would tax individual net wealth in the bands described above, which the party says reach the wealthiest 3 percent. The tax sits alongside a $30,000 tax-free income threshold, a 5 percent stamp duty on residential sales and a tax on vacant houses.

The Opportunities Party proposes a land value tax instead, at 1.75 percent on urban land and 0.5 percent on rural land. Neither ACT nor New Zealand First proposes a wealth tax.

What would a wealth tax encourage?

Many of New Zealand's existing taxes are designed to influence behaviour. Heavy taxes on tobacco encourage people to quit. Taxes on alcohol encourage moderation. Fuel taxes encourage public transport, cycling, and electric vehicles.

A wealth tax would, by the same logic, discourage saving and investing. If accumulating wealth triggers an annual levy, rational people will respond by spending more and saving less. Whether a tax encouraging reduced saving and investment is in the country's long-term interests deserves a plain answer.

Does it solve the problem?

Critics of wealth taxes argue they do not substantially improve productivity, innovation, wages, or economic growth. The things which create well-paying jobs and drive an economy forwards, including modernisation, problem-solving, and taking calculated business risks, are not spurred by redistributive taxation. Proponents point to the wealth gap and the narrow tax base, arguing some form of capital taxation is necessary for a functioning society.

Inland Revenue's analysis adds a subtler objection. A wealth tax is in effect a tax on the ordinary return to capital, and it charges a poorly performing asset at the same rate as a well performing one. For the same revenue, it therefore has to be set higher than an income tax would be. The department's briefing expects a broad income tax to have important advantages over a wealth tax for that reason.

Most New Zealanders accept paying a fair share for infrastructure, emergency services, good roads, and essential public services. The question is what gets achieved with existing taxpayer funding.

It is also worth asking whether taxing the wealthy more would improve the issue most New Zealanders feel most acutely: the cost of living. A wealth tax does nothing directly to the price of groceries, rent, a mortgage or power. Any benefit to an ordinary household depends on what the extra tax revenue buys and which other taxes might change alongside it.

A wealth tax in New Zealand

Whatever your personal view, hopefully all New Zealanders will get the chance to democratically vote on any structural changes to the tax system this November.

New Zealand's fiscal outlook means some form of capital taxation may emerge over the coming decades. Treasury's own projections make the long-term pressure clear, and the IMF has listed a comprehensive capital gains tax and a land value tax among the options for widening New Zealand's tax base. Whether the instrument ends up being a CGT, a wealth tax, tighter means-testing of NZ Super, or something nobody has proposed yet, the direction of travel is worth watching. None of it is law, and nobody should restructure their affairs on the strength of an election proposal.

Joseph Darby, chief executive of Become Wealth, sees it this way:

"Winners focus on winning the game, regardless of the rules. The rules change constantly. What doesn't change is the value of building your own financial position early, making your own savings do the heavy lifting, and never focusing on external factors such as someone else's wealth, or the assumption the tax code will stay the same."

If you want to know where your own net worth would sit against each proposal, and where the cash would come from if one became law, a first conversation with our team works through it. The tax rules will change many times over your full investment journey. Through every version of them, the people who kept saving and investing finished further ahead than the people who waited for the rules to settle.