After the NZ Election: When Promised Tax Changes Would Start

Written on 5 November 2026, two days before the general election, and updated on 8 November 2026 with the preliminary result. It recommends no party. The point it was written to make still holds: until an Act says otherwise, the tax law you live under after the election is the law you lived under before it.

Where the count stands

The Electoral Commission’s preliminary count has every party vote counted, and it is “not the formal declaration of results”. On it, National, ACT and New Zealand First have 67 of 131 projected seats (42 + 13 + 12), more than the 66 needed for a majority. Labour, the Greens and Te Pāti Māori have 57 (36 + 16 + 5), or 64 with Opportunity’s 7. Official results are due on 27 November 2026, and special votes can move list seats.

For the promises below, that means:

• Labour, Green, Te Pāti Māori and Opportunity proposals, including Labour’s capital gains tax, are unlikely to be legislated, because Labour is not on track to lead the next government. That would change only if the official count or coalition talks produced a different government.
• National, ACT and New Zealand First promises are still promises. No coalition agreement had been published by 8 November 2026. An agreement can keep, change or drop any of them, and whatever it contains still needs a Bill.

Nothing changes on election night

The Electoral Commission’s timetable sets out what happens after the vote:

Forming a government has no timetable of its own. Parliament’s guidance says “there is no set date by which the formation of the Government has to take place”. Until a new government is appointed the caretaker convention applies, and Inland Revenue carries on: “The IRD collects tax revenue”.

How a promise becomes tax law

1. Negotiation. Under MMP, parties usually negotiate coalition or support agreements. A policy can survive this, change or disappear. An agreement is a political commitment and changes no tax.
2. Bill and first reading. A Bill is introduced and MPs vote on it.
3. Select committee. The committee “usually has 6 months” to hear submissions and report back, which is when the public can comment on the detail.
4. Second reading, committee of the whole House, third reading. The House debates and can amend the Bill at these stages.
5. Royal assent. The Bill “shall become law” when the Governor-General assents (Constitution Act 1986, s 16).
6. Commencement. The Act comes into force on the date it states, or if it states none, the day after assent (Legislation Act 2019, s 25).

The last step is the one headlines skip. The Taxation (Budget Measures) Act 2025 received assent on 29 May 2025, but the provisions behind KiwiSaver’s April 2028 step commence on 1 April 2028.

Why 1 April matters, and when it doesn’t

The tax year runs from 1 April to 31 March, so many changes start on 1 April. KiwiSaver’s 3.5% did in 2026. The law can pick any date, though: the current bright-line rule applies to sales from 1 July 2024, and several promises below name 1 July.

When each party said its changes would start

Every row is a promise, listed in the same order as every party’s tax policy compared. After the preliminary count, the Labour, Greens, Te Pāti Māori and Opportunity rows are unlikely to be legislated; the National, ACT and New Zealand First rows depend on a coalition agreement and then a Bill.

The KiwiSaver promises are compared in every party’s KiwiSaver promise side by side.

The earliest dates are the tightest. From election day to 1 July 2027 is under eight months, and a select committee usually has 6 of them. To be law by that date, National’s 1 July 2027 KiwiSaver changes would need a coalition agreement that keeps them and then an early Bill or a shorter process. National’s policy document sets out no legislative timetable, so treat the date as an intention until a Bill states it. Labour’s 1 July 2027 CGT valuation date is unlikely to matter now that Labour is not on track to lead the next government.

What stays in force until Parliament changes it

• Income tax: rates from 10.5% to 39%, on the bands Inland Revenue publishes.
• Company tax: 28% for most companies.
• Bright-line test: residential land sold within 2 years, on the rule as it stands.
• KiwiSaver: 3.5% default and employer minimum, rising to 4% on 1 April 2028. That rise is already law and needs no election outcome to happen. See the employer rise.
• No general capital gains tax, wealth tax or land value tax. None exists until an Act creates one.

What not to do on post-election headlines

• Don’t sell a rental to beat a CGT headline. On the preliminary count Labour’s CGT is unlikely to be legislated. Even on its own terms, Labour’s document says “Not a single dollar of profit made before 1 July 2027 will be taxed”, so its design never rewarded selling first, and a sale today still faces today’s bright-line rule and selling costs.
• Don’t buy a valuation for 1 July 2027. The proposal is unlikely to be legislated, the method was never specified, and a value dated now is not a value at that date.
• Don’t change your KiwiSaver rate or apply for a suspension because of a promised rate. Decide on your budget under today’s rules.
• Don’t restructure a business, trust or portfolio around a promised rate. Rates and exemptions can change through negotiation and select committee.
• Employers: don’t change payroll settings until there is an Act and Inland Revenue guidance.

What to watch for instead

Check these in order, because each one is firmer than the last:

1. The official result on 27 November 2026, which confirms or moves the projected seats.
2. The published text of any coalition or support agreement.
3. A Bill on legislation.govt.nz, which shows the real wording.
4. The commencement section, which gives the real date.
5. Inland Revenue guidance on what to do and when.

If you already have a decision to make for other reasons, make it on today’s law, with advice where the stakes justify it. To see your pay under current rates, use the take-home pay calculator.