A plain-language guide to MMP voting, Parliament, and the structure of government - from ballot paper to Cabinet table.
April 2026When you vote in a New Zealand general election, you receive a single ballot paper split into two halves. Each vote does something completely different - one shapes who represents your local area, the other determines how Parliament is actually composed.
They look similar on the paper but work very differently.
You vote for a specific person to represent your local geographic area (your "electorate"). There are 72 general electorates and 7 Māori electorates. Whoever gets the most votes in your electorate wins that seat - simple first-past-the-post at the local level.
This determines who holds certain seats, but has limited effect on overall party composition in Parliament.
You vote for a party, not a person. This determines how many seats each party gets in total. If a party wins 30% of party votes, they get roughly 30% of Parliament's 123 seats.
This is the vote that actually shapes the composition of Parliament and therefore which parties can form a government.
To enter Parliament, a party must either win 5% or more of the party vote nationwide, or win at least one electorate seat. This stops tiny fringe parties from fragmenting Parliament - but also means a small party can enter with full proportional representation if they win a single local seat.
NZ is divided into local electorates, each electing one MP. There are two tracks.
Geographically defined areas. Every NZ voter not on the Māori roll votes in one of these. Sizes vary - rural electorates cover more land, urban ones are smaller geographically but denser.
Special seats for voters on the Māori electoral roll. Māori voters can choose to enrol on either the general or Māori roll. These seven seats overlay the general electorates nationally.
After electorate seats are allocated, remaining party seats are filled from each party's ranked list of candidates. List MPs have no local electorate - they represent the country at large. Most Cabinet ministers are List MPs.
The journey from your vote to a functioning government involves several distinct steps.
Party votes are tallied nationwide. Using the Sainte-Laguë formula (an iterative allocation method), seats are distributed proportionally. A party with 30% of party votes gets roughly 37 of Parliament's 123 seats.
Each party's electorate winners take their seats. The party vote then determines the total seats each party is entitled to - electorate wins count toward that total. List MPs are added to bring each party up to their entitled share.
Almost no single party wins 62+ seats alone. The party with the best chance of building a majority starts negotiations with potential partners. This typically takes 3–6 weeks after the election. The results - policy concessions, ministerial roles, confidence and supply commitments - are published publicly.
Once a coalition or confidence arrangement is confirmed, the Governor-General formally invites that leader to form a government. The Prime Minister appoints Cabinet. Parliament is opened by the Governor-General.
Occasionally a party wins more electorate seats than their party vote entitles them to. They keep those seats - they can't be taken away. Parliament temporarily expands beyond 123 to accommodate them. This is called an "overhang" and has happened in NZ (NZ First in 2005).
NZ has three distinct but interlocking layers: the voters who elect Parliament, Parliament which is the full chamber of all elected MPs, and the Government (a subset of Parliament) which holds executive power. Understanding which layer does what is the key to understanding how NZ politics actually works.
~3.5m eligible voters elect MPs every 3 years via MMP ballot
123 MPs from all parties. Passes laws, approves spending, holds government to account
Coalition parties holding 62+ seats. Cabinet drawn from these MPs runs the country
Leader of governing coalition. Sets direction, chairs Cabinet, represents NZ internationally
All NZ citizens and permanent residents aged 18+ can enrol and vote. Voting is not legally compulsory, but enrolment is. Voters elect Parliament every three years - they do not directly elect the Prime Minister, Cabinet, or the government. Their only formal democratic act is choosing their local MP and their preferred party.
Parliament is the full chamber - every MP elected, from every party, including the government and the opposition. It is the supreme law-making body in NZ. Parliament passes all legislation, approves the government's budget, and holds the government accountable. The government must always maintain Parliament's confidence to stay in power.
NZ has a unicameral Parliament - only one chamber. There is no Senate or upper house. The Legislative Council (NZ's old upper house) was abolished in 1951, making NZ's Parliament unusually streamlined: a bill passed by a simple majority becomes law without a second chamber reviewing it.
The government is the subset of Parliament's MPs who form the ruling coalition - in NZ currently National, ACT, and NZ First. They hold a majority of seats, which means they can pass legislation and survive confidence votes. The government is not separate from Parliament - its ministers are MPs who sit in Parliament while simultaneously running their departments.
This fusion of executive and legislature is the defining feature of a parliamentary system. The government must always maintain Parliament's confidence. If it loses a confidence vote, it must either resign or call a snap election.
Cabinet is the inner decision-making body of the government - typically around 20 senior MPs who each hold one or more ministerial portfolios (Finance, Health, Education, etc.). Cabinet meets weekly, usually on Mondays. Decisions made in Cabinet are binding on all ministers - Cabinet collective responsibility means ministers must publicly support Cabinet decisions even if they disagreed privately.
Not all government MPs are in Cabinet. There are also Ministers outside Cabinet (junior ministers with specific portfolios) and Parliamentary Under-Secretaries (supporting senior ministers). Coalition parties negotiate which portfolios each party holds - ACT and NZ First typically secure specific ministerial roles as part of their coalition deal.
The PM is the head of government - but not a directly elected position. They become PM because they lead the party (or coalition) that commands a parliamentary majority. The Governor-General formally appoints them. The PM chairs Cabinet, sets the government's strategic direction, and represents NZ internationally.
The phrase "first among equals" matters: the PM is constitutionally a Cabinet minister like the others, not a president-style figure above them. Their power rests on maintaining the confidence of their coalition partners. A PM who loses the support of their own caucus or coalition partners can be removed without any public vote.
The Governor-General is the King's representative in NZ, appointed on the PM's advice. The role is almost entirely ceremonial: they formally appoint the PM, open and dissolve Parliament, sign bills into law (Royal Assent), and grant honours. In practice they act on the advice of the elected government in all but exceptional constitutional circumstances.
The GG holds reserve powers - theoretical authority to refuse to sign a bill, dissolve Parliament, or appoint a PM without clear parliamentary support. These have not been exercised in modern NZ. They exist as a backstop against constitutional breakdown, not as a check on day-to-day governance. The current GG is Dame Cindy Kiro.
Three concepts that explain most of what you read in NZ political news.
A smaller party can support a government without being in it. They agree to vote for the government in confidence votes and on budgets, in exchange for policy wins or influence. They don't hold ministerial positions. This is common in NZ - it gives small parties influence while keeping their independence.
Any MP can move a motion of no confidence in the government. If it passes - meaning more than half of Parliament votes against the government - the PM must either resign or advise the GG to call an election. This is the ultimate check Parliament has over the executive.
All Cabinet ministers must publicly support Cabinet decisions, even if they argued against them in the room. If a minister can't support a decision, they must resign. This keeps government messaging consistent and prevents ministers from publicly undermining their own government's policies.
NZ has one of the shortest electoral cycles in the world. Governments must go to an election every three years - there's no mechanism to extend it (unlike the UK's five-year maximum). This creates constant electoral pressure and means policy must show results quickly.
Parliament operates through committees of MPs that examine specific bills and policy areas in depth. Committees include members from all parties, including opposition. They call experts, take public submissions, and recommend amendments. This is where much of the real scrutiny of legislation happens - not the floor debates.
Unlike the UK (House of Lords), Australia (Senate), or the US (Senate), NZ has no second chamber. A bill passed by a majority in Parliament becomes law. This makes NZ's system fast but means there is less revision and fewer checks on majority governments. The courts and the media do more of this work in NZ.