HTS Chapter 31 — Fertilizers Tariff Rates (2026)

HTS Chapter 31 covers fertilizers, encompassing a wide range of products that enter the United States under various tariff classifications. Encompasses animal and vegetable fertilizers, chemical fertilizers including nitrogen, phosphate, and potassium compounds used in agriculture. The average MFN (Most Favored Nation) duty rate for products in this chapter is 0%. Many products in this chapter enter duty-free at the base MFN level. In addition to MFN rates, most non-EU imports face the 10% Section 122 tariff (effective February 24, 2026; scheduled to sunset approximately July 24, 2026). EU-origin goods instead fall under the EU-US trade deal's 15% all-inclusive ceiling (effective July 1, 2026) — MFN does not stack on top, and goods with MFN rates of 15% or higher pay MFN only. Chinese imports in this chapter face additional Section 301 tariffs ranging from 7.5% to 100%, depending on the specific product classification. Common products in this chapter include Urea, Ammonium nitrate, Diammonium phosphate, Potash (potassium chloride), NPK blended fertilizers, Superphosphates, Organic fertilizers. Related HTS chapters include Chapter 28, Chapter 38, which cover similar or complementary product categories.