Data sources, monitoring, and review process behind every estimate.
1
Data Pipeline
Base duty rates sourced directly from USITC Harmonized Tariff Schedule (General rates of duty, Column 1).
Section 301 China tariffs mapped to Lists 1-4A per USTR proclamations and Federal Register notices.
Section 232 duties on steel/aluminum (50%), autos (25%), copper (50%), semiconductors (25%), and timber (10-25%) applied per Chapter 99 subheadings. Pharmaceuticals: 100% in effect from Jul 31, 2026 for companies named in Annex III to Proclamation 11020, and for all other importers from Sep 29, 2026.
Section 122 global 10% surcharge per Trade Act of 1974, collected Feb 24 to Jul 23, 2026. It expired by operation of law on Jul 24, 2026 and is no longer collected, so it is excluded from current figures and retained only for historical entries and refund tracking.
Section 301 forced labor duties of 10% to 12.5% across 60 economies (CBP CSMS #69326983), effective Jul 24, 2026, including the net-of-MFN ceiling, the Section 232 carve-out, and USMCA, CAFTA-DR and listed-product exemptions.
IEEPA / Reciprocal tariffs tracked historically - struck down by Supreme Court on Feb 20, 2026.
2
Real-Time Policy Intelligence
Automated Federal Register monitoring for tariff-related actions from USTR, BIS, CBP, and ITC.
Human review and approval before policy changes are reflected in calculations.
Public changelog published with citations to official source documents.
Official Data Sources
Disclaimer: This calculator provides duty estimates for planning purposes only. Actual duties may vary based on CBP classification rulings, valuation adjustments, AD/CVD orders, and other factors. Gateway Lines is not a licensed customs broker. Please always seek guidance and advice from a licensed customs broker for official determinations.
Policy intelligence reviewed by Gateway trade compliance team
Frequently Asked Questions
Common questions about US import tariffs and duties
Can I compare tariff rates across multiple countries?
Yes. Calculate the same HTS code for different countries of origin to compare applicable base duty, Section 301 and Section 232 measures, and estimated import fees. The Section 122 surcharge expired July 24, 2026 and is excluded from current calculations. Use the country comparison view or "Compare alternatives" after calculating; exemptions and trade-agreement eligibility depend on your product and its origin.
Is this good for enterprise importers?
Yes. Gateway is built for both individual importers and enterprise compliance teams. Enterprise features include 30,000+ HTS code coverage, API access for embedding tariff intelligence in your own ERP/TMS, bulk classification, real-time tariff change alerts, audit-grade exportable reports, and dedicated support. Free for individual use; talk to sales for volume API access and enterprise SLAs.
What is Section 301 tariff?
Section 301 tariffs are additional duties on Chinese-origin goods under the Trade Act of 1974, charged on top of the standard MFN rate. They cover thousands of products across USTR Lists 1 through 4A, and rates have increased over time on strategic sectors such as electric vehicles, semiconductors, batteries, and medical goods. Because USTR updates these rates periodically, Gateway shows the exact list and current rate for your specific product.
What is Section 232 tariff?
Section 232 tariffs are national security duties under the Trade Expansion Act of 1962, covering steel, aluminum, copper, automobiles and parts, timber and wood furniture, semiconductors, and pharmaceuticals. Rates and country exemptions change as new proclamations and trade agreements take effect, and several partners have negotiated reduced rates. Gateway displays the current rate for your specific product and country of origin.
How do I find my HTS code?
Use Gateway's intelligent search to describe your product in plain English. Our AI matches your description to the correct HTS classification from our database of 30,000+ codes validated against USITC HTS 2026.
Is the tariff calculator free?
Yes, Gateway Tariff Calculator is completely free. Search HTS codes, calculate Section 301 and Section 232 tariffs, compare sourcing countries, and get AI-powered explanations at no cost.
How accurate is this calculator?
Gateway combines USITC base duty rates with applicable trade measures, including Section 301 and Section 232, and links to official sources from CBP, USTR and the Federal Register. Expired Section 122 duties are excluded from current calculations. Results are estimates: classification, origin, exclusions and exporter-specific AD/CVD treatment can change what you owe. Verify the entry details with your customs broker.
What is the Section 122 tariff?
Section 122 of the Trade Act of 1974 was used for a temporary 10% import surcharge beginning February 24, 2026. That surcharge expired July 24, 2026 and is no longer included in current Gateway calculations. Other applicable duties, including Section 301 and Section 232 measures, must still be checked for the product and origin. See the Section 122 page for the dated policy history.
What happened to the IEEPA tariffs?
The Supreme Court struck down IEEPA-based tariffs in 2026, including the reciprocal tariffs and the fentanyl and trafficking tariffs on Canada, Mexico, and China. The administration replaced them with a temporary Section 122 surcharge under the Trade Act of 1974. Duties paid under the former IEEPA tariffs may be refundable through CBP, and Gateway reflects the rates CBP currently enforces.
