ForestryBrief Tools

US Lumber Tariff Stacking Calculator

Calculate the total US import duty on softwood lumber. Stacks Section 232, Canadian AD/CVD, Merchandise Processing Fee, and Harbor Maintenance Fee by origin country and producer.

Shipment details

Declared customs value (USD)

Origin country

Canadian producer

Producer (6th Admin Review rates)

Product type

Is this product covered by Section 232?

Duty breakdown

Sources & notes: Section 232 rates from White House Proclamation (Sep 29 & Dec 2025). Canadian AD/CVD from 6th Administrative Review (Dept. of Commerce). EU/Japan capped at 15% total per Section 232 amendment. UK capped at 10% total. MPF = 0.3464% (min $31.67, max $614.35). HMF = 0.125% on imports arriving by vessel. Section 122 (10%, Feb 2026) exempts products already under Section 232.

Disclaimer: This is an educational estimate. Actual duty depends on HTS classification, ruling-level detail, and current administrative review. Consult a licensed customs broker for binding calculations.

This tool accompanies ForestryBrief Professional #9 — The Atlantic Is Shrinking.