Rotterdam: The steel melt and pour rule took effect on 1 October 2026, and every importer of steel into the EU must now declare the country where the metal was first melted and poured. Implementing Regulation (EU) 2026/1963 sets the requirement, and a Mill Test Certificate that names the country and the heat number must back each customs declaration, as PwC explains.

The rule targets a familiar loophole. A producer can melt steel in one country, roll it in a second and ship it from a third, so the export country on a customs form says little about the origin of the metal. The melt and pour declaration lets customs officers see where the steel really started.

That data matters because trade defence depends on origin. Since 1 July 2026 the EU steel overcapacity regulation has applied tariff-rate quotas about half the size of the 2024 volumes, and it raises the duty on out-of-quota imports from 25% to 50%. Exporters can try to dodge the higher duty by hiding origin, so the melt and pour country gives enforcement a firmer base.

Provisional safeguards sit beside the melt and pour rule as another layer. Under Implementing Regulation (EU) 2026/2133, the EU imposed measures on grain-oriented electrical steel and on laminations and cores for transformers on 18 September 2026. They apply from 25 September for 155 days, until 26 February 2027, with minimum price thresholds of €2,800 to €3,400 per tonne within quotas and €3,500 per tonne above them.

The carbon border mechanism points in the same direction as the melt and pour rule. The Carbon Border Adjustment Mechanism has applied in full since 1 January 2026 and covers 569 products, including iron and steel, and the Commission has proposed to extend it to 749 products from 1 January 2028. Parliament and the Council want to go further, and trilogue talks later this year will settle the final list.

Importers should not wait for the last date to adopt the melt and pour routine. From 1 October 2027, alternative evidence such as invoices and delivery notes will count only as a complement to the certificate, so buyers need to collect mill certificates from suppliers now. Customs brokers also need to align each declaration with the heat number printed on the document.

The Dutch statistics office has described the wider pattern. Its CBS analysis notes that the old safeguard reached its maximum duration of eight years in June 2026, and the new regime replaced it in July. Guidance on declarations appears on the Commission’s taxation and customs site.

For importers, forwarders and customs brokers, the melt and pour rule is now a daily compliance task. Check supplier certificates, match every declaration to the heat number and track Commission guidance as it appears. The first months will show whether origin data can finally catch the circumvention that quotas alone could not stop.