The Green Party has corrected a Greens tax policy error after an $800m policy error was found in its New Zealand tax policy costings, with co-leader Chlöe Swarbrick saying it was a “typo”. The issue emerged in recent policy documents and was acknowledged publicly by the party.

What was corrected and how it was described

The party amended the figures after the mistake was identified, framing it as a drafting error rather than a substantive change. Swarbrick’s description of the error as a “typo” aimed to downplay the scale of the miscalculation, but the $800m figure is significant in any fiscal plan.

While the Greens have not shifted their overall tax proposal, the correction changes how the numbers add up and invites questions about the internal checks applied before release. In a tight economic debate, even one large error can affect perceptions of competence.

Why the mistake matters for credibility

For voters weighing competing economic plans, a high-profile correction can undercut trust, especially when opposition parties are quick to challenge policy detail. The Greens are seeking to position themselves as credible fiscal managers, and clarity over costings is central to that claim.

The episode highlights how small drafting slips can carry large political consequences, and reinforces the importance of transparent, accurate figures in public policy debates.