Willis vs Sepuloni: The Tax Debate Defining the 2026 Campaign

Finance Minister Nicola Willis and Labour deputy leader Carmel Sepuloni faced off on RNZ's Morning Report on 18 August 2026, in a tax-policy debate that drew the main dividing lines of the 2026 election: Labour's proposed capital gains tax, a scrapped streaming levy, and National's attempt to link Labour to the Greens' tax agenda.

Willis pushed two lines of attack. The first targeted Labour's fiscal credibility, accusing the party of having a "hidden bill" it cannot fund and "unfunded promises" that would leave it short of cash. The second sought to tie Labour to the Greens' tax wishlist, with Willis naming Greens co-leader Chlöe Swarbrick as the designer of options including an inheritance tax, an asset tax, a gift tax, an increase to the corporate tax rate, and an increase to the top personal tax rate. (RNZ)

Sepuloni drew a firm line. None of those options are Labour policies, she said. Labour's only tax policy is a capital gains tax (CGT), which the party says will affect only one in 10 people. A CGT taxes the profit made when someone sells an asset — in this case, commercial or residential investment property. The proposal, announced in Hipkins's State of the Nation address in February 2026, would impose a 28 per cent tax on that profit, taking effect from 1 July 2027. It would not apply to the family home. (Labour Party; National Party research)

Willis rejected the one-in-10 framing as "ludicrous," arguing that landlords would likely pass the costs onto tenants. She has previously made the point in Parliament that Labour's CGT would tax a renter's home but not an owner-occupier's. Willis also noted that Labour leader Chris Hipkins had promised there would be no capital gains tax under Labour, a position he has since reversed. (RNZ; Nicola Willis MP, Facebook)

The streaming levy provided the debate's sharpest flashpoint. A streaming levy is a charge on services like Netflix or Disney+, similar to the levy that funds local content on traditional television. Hipkins ruled out such a levy on Monday, and Labour subsequently withdrew a member's bill in the ballot that would have imposed one. (A member's bill is a bill drawn by ballot from a pool proposed by individual MPs, not necessarily part of the government's programme.) The coalition government had separately been looking at a streaming levy but decided not to pursue it. (RNZ)

Labour blamed an "administrative oversight" for the mixed messaging and confirmed it will not campaign on a streaming levy. Sepuloni said member's bills are not necessarily part of an election campaign offering and that the streaming levy bill was an oversight that had been removed. Willis said National ruled out a streaming levy because "the last thing New Zealanders need is higher charges for their weekly costs." (RNZ)

Tax has been a live battleground in Parliament throughout 2026. During a sitting on 28 May, the Speaker reminded the House that the bill under consideration was a taxation bill, not a general budget debate opportunity. On 29 July, an answer to a question in the House listed tax measures including a wealth tax, inheritance tax, land tax, gift tax, company tax hike, personal tax hike, and new property taxes. The government's own targeted tax changes, announced on 24 March and effective 1 April, increased the in-work tax credit by $50 a week, which it said would provide support for families. (Hansard, 28 May 2026; Hansard, 29 July 2026; Hansard, 24 March 2026; Hansard, 1 April 2026)

National's messaging has been coordinated across caucus. MP Scott Simpson posted on 19 June that Labour has a "hidden bill" with no plan for how it will pay for it, while also noting that Labour had warned Willis before the 2023 election that her tax cut promises were unaffordable and would force borrowing. That 2023 critique is on the record: Labour's fiscal plan during the campaign stated it was not the time for additional taxes or unfunded tax cuts, which it said would add to inflation and take money from public services. (Scott Simpson MP, Facebook; RNZ, September 2023)

Sepuloni's counter-attack was pointed. She said National was trying to divert attention from its own internal ructions. Willis offered what she called the "plain and simple" version of the Chris Penk saga: Penk mounted an unsuccessful leadership challenge and resigned from Parliament. (RNZ)

The broader picture is that this Morning Report exchange crystallised the campaign's tax architecture in a way that will recur through to polling day. National is running on cost-of-living messaging, coalition discipline, and the claim that Labour's spending commitments are unfunded. Labour is running on a single targeted tax, a CGT narrow enough to affect a fraction of sellers, and healthcare spending funded by it. The Greens' broader tax menu, which Willis raised deliberately, is the contested territory between them. Whether Labour can maintain separation from it in voters' minds is the question this debate opened without resolving.