In-Depth Guide
Understanding US Import Tariffs in 2025–2026
The scale of US tariff changes in 2025–2026 has no modern precedent. In roughly 18 months, the US went from average import tariffs of 2–3% to peak rates of 145% on Chinese goods, then back down to approximately 30% through a negotiated trade truce — while simultaneously imposing and partially reversing tariffs on dozens of other trading partners. For businesses that import goods, understanding the current landscape is not optional.
How CIF Valuation Works — and Why It Matters
Import tariffs are not applied to the product price alone. They apply to the CIF value — Cost, Insurance, and Freight — the full value of the shipment including shipping and insurance. A $5,000 product shipped with $400 in freight carries a $5,400 dutiable value. At 30%, the tariff bill is $1,620, not $1,500. For air freight shipments where shipping represents 20–30% of product value, this distinction is significant. Landed cost calculations that use only product cost will consistently underestimate the real tariff burden.
The Section 301 Stacking Problem
The 30% China tariff rate following the May 2026 trade truce is the base reciprocal rate. Pre-existing Section 301 tariffs dating to 2018 — ranging from 7.5% to 25% by product category — stack on top of the base rate. Many consumer goods from China carry effective all-in tariff rates of 35–48%. The Harmonized Tariff Schedule (HTS) code for your specific product determines which rate applies. A customs broker can confirm the stacked rate for your exact goods before you commit to a supplier.
The USMCA Advantage
Mexico and Canada remain the clearest beneficiaries of the tariff environment — not because they face no tariffs, but because goods qualifying under USMCA rules of origin face 0% duty. The key is "rules of origin": goods must be substantially produced in North America to qualify. A product assembled in Mexico from Chinese components may not qualify. A product designed and manufactured in Mexico with locally sourced materials typically does. For companies evaluating supply chain shifts, the USMCA calculation is one of the most valuable analyses available.
Planning for Tariff Uncertainty
The lesson from 2025–2026 is that tariff policy can move faster than supply chains can adapt. Companies that diversified toward Vietnam, India, and Mexico between 2018 and 2024 were significantly better positioned when the April 2025 escalation hit. The calculator above models landed cost at current rates. Running a sensitivity analysis — calculating at both current and elevated hypothetical rates — gives a more resilient picture of supplier economics. The 90-day duration of the current US-China truce means the landscape could shift again before year end.
Customs Broker Fees
Broker fees ($100–$300 per shipment for standard commercial entries) are a fixed cost that affects small orders disproportionately. A $500 product from China with a 30% tariff and $150 broker fee has an effective overhead rate far above the stated tariff percentage. High-frequency importers often negotiate bond arrangements and per-entry fees that reduce this burden for repeat shipments.