chch.live, the long read

Tax, the system, the evidence, and the 2026 argument

New Zealand taxes work and shopping hard, and wealth barely at all. This page is the whole case: the system as it is, the evidence on every instrument being argued about, what each party is actually offering, and then, separately labelled, what this site thinks of it.

How to read it. Parts 1–5 are evidence: every number carries its source and its date. Part 6 is the site’s opinion, inside a labelled box, you are meant to be able to see exactly where the facts stop and the argument starts. The short version of this page lives at /how-nz-works/tax.

1. How NZ tax works today
2. The housing–productivity link
3. The main instruments, with the evidence
4. What each party is proposing for 2026
5. What a broke country can and can’t tax
6. Conclusions, the site’s opinion

The three taxes that do the work

Of the $116.6 billion Inland Revenue collected in 2024/25: individuals' income tax paid 52%, GST 25%, company tax 17%, three taxes, 94% of the take — Inland Revenue annual report 2024/25.

Income tax is marginal, each rate applies only to the slice inside its band, never the whole income:

Annual income	Rate
$0, $15,600	10.5%
$15,601, $53,500	17.5%
$53,501, $78,100	30%
$78,101, $180,000	33%
over $180,000	39%

— thresholds from 31 July 2024: Treasury, Tax at a Glance 2024; the first threshold moves since 2010.

Around it sit the parallel rates, and the gaps between them are where the planning happens:

Vehicle	Rate	The gap it creates
Top personal rate	39%	—
Trustee income	39%	aligned to the top rate since April 2024, before that, 33%
Company	28%	11 points under the top rate
PIE funds (KiwiSaver, managed funds)	max 28%	11 points under the top rate

— Tax at a Glance 2024; IRD special report on the trust rate, April 2024; IRD, PIE income.

How income moves between them. Earn a dollar in your own name above $180,000 and the state takes 39 cents. The same dollar earned inside a company is taxed at 28 cents, and can sit there, compounding at the company rate, for as long as you don’t draw it out. Inside a trust before April 2024 it was 33 cents. The 2024 trust-rate rise to 39% exists precisely because trusts had absorbed so much shifted income after the 39% personal rate arrived in 2021, IRD’s own monitoring caught trustee income jumping as the new rate approached — IRD, aligning the trustee rate, 2024. The company gap remains, it is plugged only by the rule that taxes you again when the money finally comes out as dividends (imputation credits the 28% already paid, so a top-rate earner pays 11 more on the way out). The deferral is still worth money.

What isn’t taxed

The shorter, stranger list is what New Zealand chooses not to tax, and how unusual that choice is:

— Tax Working Group, February 2019: "unlike most other developed countries, New Zealand does not generally tax income in the form of capital gains"; OECD comparative data via OECD, Inheritance Taxation in OECD Countries, 2021. Of 38 OECD members, ~36 tax capital gains, New Zealand is the conspicuous exception alongside only a handful.

The bright-line test, the exception that proves the rule

The one corner of capital gains New Zealand does tax has a decade of policy whiplash behind it:

• October 2015, National introduces the bright-line: residential land bought and sold within 2 years is taxed as income, the family home excluded — IRD, 2015 bright-line.
• March 2018, Labour extends it to 5 years — IRD, 2018 extension.
• March 2021, extended again, to 10 years (5 for new builds) — IRD, 2021 extension.
• July 2024, the coalition cuts it back to 2 years — IRD guide IR1229, current.

What it catches: resales of investment property inside the window. What it doesn’t: anything held past two years, the family home at any point, every non-property gain, shares, businesses, art. It is a shadow of a capital gains tax on exactly one asset class, timed to catch flippers and let holders through.

What the wealthiest actually pay

In April 2023 IRD published the study the argument had always lacked. It followed 311 of the country’s wealthiest families, median net worth above $50m, across six years. On taxable income they paid about 30%, like other high earners. Measured on economic income, everything their wealth grew by, including untaxed gains, the median effective rate was 8.9% (9.4% adding GST on the comparable basis). Treasury’s matched estimate for a middle-wealth New Zealander on the same measure: 20.2% — IRD High Wealth Individuals Research Project, April 2023; Treasury AN 23/03.

The mechanism is the first half of this page: most of those families' economic income arrives as untaxed capital gains and as income retained inside companies and trusts, forms the system either doesn’t count or counts at 28 cents. The finding is not that the rich evade; it is that the base never reaches them.

Council rates, the land tax we already have, sort of

Your rates bill is the closest thing New Zealand runs to a land tax, with one crucial design fork. Every property’s rating valuation splits land value from improvement value (the buildings); their sum is capital value. Councils pick which base to rate on:

• Christchurch rates on capital value, land plus buildings, so improving your property raises the bill — CCC, setting rates.
• A minority, Nelson, Thames-Coromandel, rate on land value alone: the same rate falls on the bare site and the developed one, so holding land idle costs exactly what using it costs — Productivity Commission, Using land for housing, 2015.

Both differ from a national land tax in kind, not just degree: rates fund the council that sets them and vary street by street; a national land tax would be a single instrument set by Parliament. But the valuation machinery, the split, the three-yearly revaluation, already exists on every rates notice. The plumbing for taxing land nationally is the plumbing your council already uses.

How big the housing pile is

New Zealand’s housing stock passed $1 trillion in September 2016, hit $1.72 trillion at the end of 2021, and sits around $1.66 trillion today, roughly 3.75 times annual GDP, and about nine times the entire NZX sharemarket. Owner-occupied homes alone are 48% of everything households own, up five points since 2021, and the Reserve Bank’s own work puts land and houses at more than half of household wealth — Cotality (formerly CoreLogic NZ) housing chart packs, March 2026; Stats NZ, household net worth June 2024; RBNZ AN 2022/07.

On the other side of the ledger: 63.6% of everything the registered banks lend is secured on housing, $392 billion of $616 billion, up from 58% in 2018 — RBNZ S30 loans by sector, April 2026; RBNZ C5 sector lending, April 2026. The country’s savings, its banks' balance sheets and its tax system all lean the same way, into land.

What the economy earns per hour

While the asset pile grew, the income engine idled. New Zealand ranks 29th of 38 OECD countries on GDP per hour worked, about $68 an hour against an OECD average near $85, and roughly 40% below the average of the top half. In 1970 output per hour was close to the Scandinavian economies'; by 2022 it was 40% lower, New Zealand got richer by working more hours, not more per hour — OECD productivity data, 2023; Productivity Commission, Productivity by the numbers; MBIE/MFAT Long-term Insights Briefing 2025. In the year to June 2025 compensation of employees grew just 2.0% nominal, the wage base barely moves while the asset base compounds — Stats NZ, GDP June 2025.

Why the money flows to land

The Tax Working Group wrote the mechanism down in 2018, and nobody has seriously disputed it since: "the non-taxation of imputed income, and the absence of comprehensive taxation of capital income, give housing a relatively attractive tax treatment in practice… the tax system is likely to create a bias in household decision-making towards investment in housing, resulting in higher rates of investment in residential property and higher house prices" — TWG, Tax and Housing, March 2018. The Reserve Bank’s version is blunter: "Tax rules in NZ favour housing against other investments", leverage plus untaxed gains pushes model portfolios toward property — RBNZ AN 2022/07; Treasury lists "the skew towards (under-taxed) housing" among the causes of the country’s low capital intensity — Treasury AN 22/05.

The honest caveat: the Productivity Commission’s earlier 2012 inquiry found housing "not as tax favoured as appears widely to have been considered", the advantage then sat mostly with owner-occupiers' untaxed imputed rent. The 2019 TWG disagreed in effect, but the debate about how much tax contributes, versus supply and interest rates, is live — PC, Housing Affordability, 2012.

And land cannot answer the price signal. A factory that doubles in price does not produce twice as much; a hectare that doubles in price produces nothing extra at all. Rising house prices are not the economy growing, they are the same economy repricing.

The two experiments that proved the supply half

Auckland, 2016. The Unitary Plan upzoned about 75% of the city’s residential land. Construction responded: permits roughly doubled within five years, and a synthetic-control estimate counts about 52,200 extra dwellings consented over seven years (46% of all permits issued) — Greenaway-McGrevy & Phillips, Journal of Urban Economics 136, 2023 (the upzoning effect); Greenaway-McGrevy, Economic Modelling 160, 2026 (the 52,200 synthetic-control estimate).

Christchurch, 2011–16. The earthquakes destroyed ~11,500 dwellings; rents surged ~14% in two years, then the Land Use Recovery Plan released land and the rebuild delivered supply, and Christchurch rents stabilised and fell from 2016 while the rest of the country kept climbing — Stats NZ, Canterbury: the rebuild by the numbers, 2018. Treasury cites the city by name: same tax settings, same monetary policy, different land rules, different prices — Treasury T2020/3529.

Together the two experiments settle half the argument: supply rules move prices. What they don’t settle is the tax half, what makes land the asset everyone wants in the first place. That is Part 3.

Five taxes do the arguing in New Zealand politics. For each: what it is, the case for, the case against, and what actually happened where it was tried.

Capital gains tax

What it is. A tax on the profit when an asset is sold, usually at sale ("realisation"), usually with the family home excluded. The OECD’s February 2025 survey calls New Zealand’s regime the most limited in the OECD, and the no-CGT club just shrank again: Belgium adopted a 10% CGT from 1 January 2026 — OECD, Taxing capital gains, February 2025; Belgium FPS Finance, 2026 CGT.

For: capital income is concentrated at the top, taxing it is the most direct fix for the 8.9% problem in Part 1, and it ends the housing bias in Part 2. Against: the "lock-in" effect is real and measured, people hold assets longer to defer the tax (US estimates put the realisation response at roughly −0.7: a 1-point rate rise suppresses sales ~0.7%) — Bakija & Gentry, US state panel 1957–2007; JCT/CBO staff study, 2012. And on house prices the evidence cuts both ways: a Swiss study found higher CGT worsened price dynamics (lock-in chokes supply), while an Israeli natural experiment found exempting investors from CGT lifted their sales ~50% and lowered prices, releasing supply to first-home buyers — SNB working paper 2013-02; Syracuse CPR, 2022. The honest case for a CGT is fairness and base-broadening, cheaper houses is not a claim the evidence supports.

What happened here. The 2019 Tax Working Group split 8–3: the majority recommended a broad realisation-based CGT at full marginal rates, family home excluded by its terms of reference, worth an estimated $8.3 billion over five years, rising to ~1.2% of GDP. The minority wanted only residential rentals taxed. In April 2019 the coalition couldn’t agree (NZ First opposed) and Ardern buried it: "not because I don’t believe in it, but because I don’t believe New Zealand does" — TWG final report, February 2019; government response, April 2019. Labour’s 2026 version, a narrow property-only CGT, is in Part 4.

Land value tax

What it is. An annual levy on the unimproved value of land, the site, never the building on it. Adam Smith endorsed the principle in 1776, Henry George built a movement on it in 1879, and Milton Friedman called it "the least bad tax", because land cannot shrink, hide or leave when taxed, the tax produces no deadweight loss in theory — Friedman to the Commonwealth Club, 1978; Smith, Wealth of Nations V.2.

New Zealand has run this before. The first national land tax was 1878 (repealed within a year); Ballance’s graduated land tax arrived 1891 and moved to unimproved value in 1893, the "New Zealand model" that ran for a century until the Land Tax Abolition Act 1990 ended it from April 1992 — Land Tax Act 1878; Land Tax Abolition Act 1990. Christchurch rated on unimproved value for much of the 20th century, the tax the Georgists want is the tax this city actually used, before switching to capital value around the 1989 council amalgamation — Groves, Land Economics 1949 ("Wellington and Christchurch [rate] on un-improved value"); CCC 1996 Annual Plan (capital-value rating by then); exact switch year unverified in primary sources, certainly by 1996.

For: the cleanest efficiency case in the tax literature, the base literally cannot respond, so the tax can’t distort supply; it also falls hardest on underused land, the thing housing arguments are about. Against: it hits the asset-rich and cash-poor, farms and retirees on valuable sections, and it capitalises: buyers subtract the future tax from what they’ll pay, so land values fall, which is the point and also the pain.

What happened where it’s tried. The Danish evidence is genuinely contested, one study of a 2007 reform found the tax fully capitalised into prices; a 2024 working paper found a "precise zero" price effect with the burden shared with tenants and buyers — Høj, Jørgensen & Schou, Fiscal Studies 2018; Nielsson, Wroblewski & Yding, working paper 2024. The honest reading: land tax does reach prices, but how much is unsettled. In Pennsylvania, Pittsburgh’s split-rate tax (land ~5.77× the buildings rate) coincided with a building boom, though the landmark study itself credits land tax with only a "supporting role", and the city reverted to a single rate in 2001 after a botched reassessment, a caution about the valuations more than the tax — Oates & Schwab, National Tax Journal 1997; Plassmann & Tideman 2000 found a significant positive permit effect across PA split-rate cities.

Modelled for NZ. Westpac’s 2018 modelling estimated a 1% land tax (owner-occupiers exempt) would cut house prices ~9.5% and raise rents ~4.8%, a fair-value model, not a forecast; Cotality’s chief economist has cited external estimates of a 10–15% reduction, and Opportunity’s LVT claims the same range — Westpac, Tax and House Prices, June 2018; RNZ, Davidson on land tax estimates. Treat the range as modelled, not measured.

Wealth tax

What it is. An annual levy on net worth above a threshold, every asset, every year, whether or not it earned anything. The OECD’s 2018 report on them found the arguments strongest as a substitute for missing capital-gains and inheritance taxes, and weakest as an extra on top — OECD, The Role and Design of Net Wealth Taxes, 2018.

For: wealth inequality dwarfs income inequality, and only a wealth tax reaches it directly. Against: the record. Twelve OECD countries had net wealth taxes in 1990; the repeal list runs Austria 1994, Denmark 1997, Germany (ruled unconstitutional 1995, ceased 1997), Netherlands 2001, Finland 2006, Iceland 2006 (briefly revived 2010–14), Luxembourg 2006, Sweden 2007, France (replaced by a property-only version 2018), Ireland way back in 1978 — OECD 2018; Perret, Fiscal Studies 2021. The reasons rhyme: capital flight, narrow bases full of exemptions, valuation fights over private businesses and art, liquidity crises for the asset-rich and cash-poor, and small revenues that made repeal easy — OECD 2018, ch. 4–5.

The survivors: Switzerland (cantonal, ~0.3–1%, raises ~1% of GDP, the outlier success), Norway (~0.5–0.6% of GDP), Spain (~0.2% plus a solidarity top-up) — OECD Revenue Statistics; SSB statbank. Norway is the live experiment: rates lifted to 1.1% above NOK 20m in 2023 and valuation discounts cut, and over 30 billionaires and multimillionaires left in 2022 alone, more than the previous 13 years combined. Both sides of the result are true at once: gross wealth-tax revenue roughly doubled to ~NOK 32bn by 2024, and the top of the wealth base measurably eroded; whether the net long-run effect is positive is still argued — Guardian, April 2023; Statistics Norway, wealth tax receipts.

Raising the top income rate

What it is. The 39% rate over $180,000, in place since April 2021, forecast to raise ~$550m a year. No official evaluation of its actual yield has been published — Taxation (Income Tax Rate and Other Amendments) Act 2020; IRD OIA releases.

What the evidence says. The "elasticity of taxable income" literature finds the reliable range is roughly 0.12–0.4, and that most of the response is income relabelling, not reduced work: high earners shift income between personal, company and trust forms rather than work less or leave — Saez, Slemrod & Giertz, Journal of Economic Literature 2012. NZ estimates run higher still for the top 1%, Claus, Creedy & Teng estimated 1.3–2.2.

What happened here. New Zealand watched the relabelling live. When the 39% rate took effect in 2021, the company rate stayed 28% and the trust rate 33%, and trustee income jumped ~50% in a year, $11.4bn to $17.1bn, as imputed dividends were pushed out ahead of the new rate. When the trust rate was aligned to 39% in April 2024, trustee income spiked again, +167.5% to $40.6bn, another wave of retiming — IRD trust statistics; Beehive, Budget 2023 trustee alignment; CAB-23-SUB-0142. The lesson is mechanical: a top rate only holds where the parallel rates match. The trust gap is closed; the company gap (28%) remains , plugged only by taxing again at distribution. For comparison, Australia’s top rate is 45% plus a 2% Medicare levy, 47% effective — ATO resident rates.

Inheritance tax

What it is. A tax on transfers at death, or on the gifts that dodge it. Twenty-four of 37 surveyed OECD countries levy one: Japan tops out at 55%, the UK and US at 40% (the US exempts the first $15m from 2026; the UK’s nil band is £325,000 plus £175,000 for a home) — OECD, Inheritance Taxation in OECD Countries, 2021.

For: the only tax on wealth that arrives when the owner no longer needs it, arguably the least distorting moment to tax at all. Against: it is the most avoided tax in the catalogue, in-life gifts (the UK exempts them if the donor survives seven years), business and farm reliefs, trusts and valuation discounts cut effective rates far below statutory ones; across the OECD they raise ~0.5% of total revenue, and only Belgium, France, Japan and Korea pass 1% — OECD 2021.

What happened here. New Zealand abolished estate duty for deaths after 17 December 1992, by then it raised almost nothing, and gift duty followed in October 2011, its compliance costs outweighing its revenue — Estate Duty Abolition Act 1993 (effective 17 Dec 1992); Taxation Act 2011. The result is a small club: New Zealand taxes wealth transfers not at all, alongside Australia, Canada, Norway and a handful of others — OECD 2021.

The election is Saturday 7 November 2026 — Electoral Commission, key dates. What follows is what each party has actually published as of this page’s date, not promises repeated from 2023, not what they might say. The Treasury’s PREFU lands 29 September, and National, ACT and NZ First are holding their detailed packages until after it; the table will be updated as those land — PREFU date: Beehive.

Table last updated 18 September 2026, pre-PREFU. Sources: party policy documents linked per row; KPMG’s election policy tracker (v3, September 2026) and Deloitte’s Tax Alert series (parts one and two published) cross-checked against them.

Three notes on the table. National’s "no new taxes" pledge (23 August 2026) rules out new tax types, CGT, wealth, inheritance, gift, bank, bed taxes, but pointedly not increases to existing taxes; its income-tax announcement is deliberately post-PREFU — RNZ, 23 August 2026; party page. Labour’s CGT is the narrow version the 2019 minority wanted, property only, gains from July 2027, estimated ~$700m a year average and ring-fenced to fund three free GP visits a year ("Medicard") — Labour CGT policy, October 2025; Medicard. The Greens' estimate was already corrected once: an $800m bookkeeping error (IRD admin funding counted as revenue) dropped the claimed net from $5.9bn to $5.7bn by 2030/31 — RNZ on the correction; Green manifesto 2026.

And one absence worth naming: Opportunity (the rebranded Opportunities Party) is the only party whose package is the land-tax swap, a 1.75% urban land value tax funding a $19,400 tax-free Citizen’s Income, phased over ten years with deferrals for asset-rich-cash-poor owners; their own costing claims ~$4bn a year of headroom — Opportunity Tax Reset, May 2026; costings amended August 2026; Deloitte Tax Alert, July 2026. Every other party’s offer is a patch on the existing base; theirs is the only redesign on the table, which doesn’t make it right, but does make it the only plan that matches Part 6’s shape.

The debt track

Net core Crown debt has climbed every year since 2019, and the operating balance has been in deficit every year since 2020 — Financial Statements of the Government, each year; BEFU 2026, 28 May 2026 for forecasts:

June year	Net core Crown debt	% GDP	OBEGAL*
2019	$57.7bn	19.0%	+$7.4bn surplus
2020	$83.4bn	27.0%	−$23.1bn (COVID)
2021	$102.1bn	~30%	−$4.6bn
2022	$128.9bn	35.9%	−$9.7bn
2023	$155.3bn	39.3%	−$9.4bn
2024	$175.5bn	42.5%	−$12.9bn
2025	$182.2bn	41.8%	−$9.3bn
2026 (forecast)	$191.8bn	42.4%	−$11.9bn
2027 (forecast)	$216.5bn	45.6%	−$11.4bn
2028 (forecast peak)	$232.4bn	46.1%	−$4.3bn
2029 (forecast)	$241.4bn	45.6%	+$2.6bn

— FSG year to June 2025 for actuals; BEFU 2026 for forecasts. *OBEGAL, operating balance before gains and losses, the headline deficit measure; from 2025 the government reports OBEGALx, which also excludes ACC, the definitions changed, so the two series aren’t interchangeable. (The wider "operating balance" whipsaws with valuation gains: +$16.2bn in 2021, −$16.9bn in 2022, +$5.3bn in 2023, which is why the debate runs on OBEGAL.)

That’s the fiscal context the whole election runs inside: debt has more than tripled since 2019, the deficit doesn’t close until 2028/29 on Treasury’s numbers, and the government’s own long-run target is to hold debt inside 20–40% of GDP, a target it is currently outside — Fiscal Strategy Report, Budget 2026.

Which base is growing

Compare the two things a country can tax. The wage base: PAYE grew just 0.3% in 2024/25, the income-tax engine is nearly stalled — IRD non-departmental revenue schedule, 2024/25. The asset base: the housing stock has grown ~65% since 2016 and sits at ~3.75× GDP — Cotality chart packs. New Zealand already leans on the slow base unusually hard: income taxes are 59% of all revenue, third-highest in the OECD, and GST another 29% (third-highest again) — OECD Revenue Statistics 2025.

What a large state actually costs, the Nordic answer

The countries that run genuinely big states don’t fund them with taxes on the rich, they can’t; the rich aren’t numerous enough. They fund them with broad taxes on ordinary earners — OECD Revenue Statistics 2025, country notes:

	Tax / GDP	Income tax share of revenue	Property taxes share
Denmark	45.2%	66.6% (personal alone 57.2%)	3.9%
Sweden	41.4%	35.4%	2.0%
Norway	40.2%	51.9%	2.8%
New Zealand	32.9%	59.0%	5.9%

— OECD Revenue Statistics 2025 (2023 structure shares, 2024 tax/GDP). Denmark raises roughly a quarter of GDP from personal income tax alone; Norway’s famous wealth tax collects NOK 32bn, about 0.6% of GDP, a rounding error inside its budget.

The conclusion that follows is uncomfortable for both flanks: NZ’s tax shape is already Nordic, heavy on wages and consumption, light on wealth. What differs is the rate dial. A bigger state here would be funded mostly by the middle class, as it is there; a smaller gap to wealth taxes, as Part 3 showed, buys almost nothing.

Glossary

Where to read the primary sources

• IRD High Wealth Individuals Research Project: April 2023; the 8.9% study
• OECD, Taxing capital gains: February 2025
• OECD, The Role and Design of Net Wealth Taxes: 2018
• OECD, Inheritance Taxation in OECD Countries: 2021
• OECD Revenue Statistics 2025: the Nordic and NZ splits
• Tax Working Group final report: February 2019
• Westpac, Tax and House Prices: June 2018; the land-tax model
• Budget Economic and Fiscal Update 2026: May 2026; the debt track
• KPMG 2026 election tax tracker: v3, September 2026
• Deloitte Tax Alerts: election series
• Saez, Slemrod & Giertz on the ETI: JEL 2012

Last reviewed 18 September 2026, pre-PREFU; the party table updates as manifestos land. Sources: IRD, Treasury, Stats NZ, OECD, BEFU 2026, party policy documents, KPMG, Deloitte. Corrections: /corrections.

Last reviewed 18 September 2026. Corrections: /corrections.