Navigate tariffs with confidence

About the tariff simulator

Flexport’s free US import duty & tariff calculator helps you calculate customs fees, taxes, and duties instantly for imports from 195+ countries. Our customers rely on real-time duty rates updated daily by licensed customs brokers. Simply enter your HTS code and origin country to see exactly what U.S. Customs will charge—including all applicable tariffs and special program rates.

Comprehensive Import Duty & Customs Fee Calculations

Our HTS code lookup tool provides accurate import tax calculations with complete transparency. Whether you’re calculating duties for electronics, apparel, machinery, or any commodity, our calculator covers all 99 HTS chapters and delivers instant results.

• Real-time duty rates for Section 301 (China tariffs), Section 232 (steel/aluminum), and reciprocal tariffs—updated daily with the latest Federal Register notices and presidential proclamations
• Country comparison tool showing duty rates from alternative sourcing countries, helping you optimize your supply chain and reduce import costs
• Preferential trade program flags for USMCA, DR-CAFTA, KRFTA, GSP, and other free trade agreements that can reduce your duties to 0%
• Clear breakdown of import fees including ad valorem duties, specific rates, compound rates, and customs processing fees—all in plain English
• Date-specific calculations with automatic adjustment for entry date and date of loading, ensuring you see the exact duty rate that will apply when your shipment clears customs
• Section 232 steel & aluminum calculator with precise calculations based on declared percentage of metal content for derivative products
• Special program indicators (SPI) automatically surfaced—such as code “P” for DR-CAFTA or “S” for USMCA—so you never miss duty savings opportunities

Why Our Customers Trust This Calculator

Unlike generic import duty calculators, Flexport’s tool is backed by real operational expertise. We’re a licensed customs broker handling thousands of import clearances daily, and our calculator reflects the official data from the U.S. government as published in the Federal Register. With daily updates, comprehensive, HTS coverage, and calculations verified by licensed professionals, you can trust our duty estimates for budgeting, compliance, landed cost analysis, and supply chain decisions.

Tariff Simulator Philosophy

The tariff simulator is designed for trade compliance professionals who work with HTS codes. The search functionality uses official HTS classification language rather than common product names. For example, searching for “computers” won’t yield results because they’re classified as “Automated Data Processing Machines” under heading 8471 in the Harmonized Tariff Schedule.

All duty rates and tariff information in this customs duty calculator come exclusively from official government sources. We only incorporate data from Federal Register Notices, Executive Orders, and Customs and Border Protection (CBP) guidance documents. Information from social media, press conferences, or news media is never included until officially published by the relevant agencies.

The calculator automatically applies or removes special program codes, tariff exclusions, and duty rates based on your input parameters—including dates, country of origin, and product classification. As you modify these inputs, the tool dynamically updates to reflect the applicable CBP rules and regulations for your specific import scenario.