The United States has imposed a 12.5 percent tariff on New Zealand exports, replacing the previous 10 percent rate, as part of a new tariff regime covering 60 trading partners. The tariffs take effect after 4pm on the Friday following the announcement, according to RNZ.

The move brings to a close a process that began in February 2026, when a temporary 10 percent import surcharge was put in place for 150 days. The White House described that surcharge as a response to what it called "fundamental international payments problems." It was a stopgap measure after the US Supreme Court ruled the earlier "Liberation Day" tariffs illegal, leaving a temporary rate in place while a new regime was developed.

In March 2026, the Office of the United States Trade Representative (USTR) launched what are known as Section 301 investigations into 60 trading partners, focused on forced labour. Section 301 is the US legal mechanism that allows USTR to investigate and respond to foreign trade practices it considers unfair. Hearings were held on 28 April 2026, and New Zealand was among the economies examined. USTR released its findings and proposed action in June 2026, initially proposing a 10 percent rate of additional duties. The final regime applies 12.5 percent additional duties on 45 of the 60 investigated economies, with rates across the group ranging from 10 to 12.5 percent, as Reuters reported.

US Trade Representative Jamieson Greer stated the new tariffs were designed to combat imports made with forced labour. New Zealand has previously rejected the US claim that its exports involve forced labour, a position that has not shifted with the imposition of the final rate.

The trajectory from proposal to imposition was notably fast. USTR proposed a 10 percent rate in its June findings; the final New Zealand rate landed at 12.5 percent. The section of the USTR report covering New Zealand's inclusion has not been matched by any public evidence of forced-labour violations in New Zealand supply chains, and the Government's rejection of the premise stands on the record. The gap between the proposed 10 percent rate in June and the 12.5 percent final rate applied to New Zealand has not been publicly explained by USTR. New Zealand falls into the higher tier alongside 44 other economies, rather than the lower 10 percent tier applicable to the remaining 15 investigated partners.

The bilateral trade relationship gives a sense of the stakes. US goods and services trade with New Zealand totalled an estimated US$16.6 billion in 2024, according to USTR figures. The tariff applies to New Zealand exports entering the US market, and the rate increase from 10 to 12.5 percent adds cost at the border for exporters already navigating the temporary surcharge period.

The legal framework matters here. The forced-labour framing places these tariffs on a different statutory footing from the earlier "Liberation Day" measures that the Supreme Court struck down. Whether this Section 301 basis proves more legally durable than the previous regime is an open question, but the investigations followed a formal process: initiation, public hearings, findings, and proposed action, all documented across USTR releases from March through June 2026.

For New Zealand exporters and trade officials, the immediate challenge is practical. The 12.5 percent rate applies across the board rather than targeting specific sectors or products, and it takes effect within days of the announcement. The Government's rejection of the forced-labour premise has not altered the outcome. The broader context here is one of transition: with the 150-day temporary surcharge period announced in February now giving way to this permanent Section 301 regime, the policy setting has shifted from interim to structural. Absent a bilateral resolution or legal challenge, New Zealand exports to the United States will carry the higher rate for the foreseeable future.