Tariff Policy & Law

Import Duty

Import Duty A tax collected by a government on imports to raise revenue, protect domestic industries, or as a form of trade policy. Import duties are charged at the point of entry and can vary widely based on the product and its country of origin.

Also Known As:Import Tariff, Customs Duty, Import Tax
Last Updated:April 2025

Latest Update (March 2025)

The U.S. Customs and Border Protection has announced new electronic filing requirements for all import entries, aiming to streamline duty payment and eliminate paper processing by 2026.

Read More on CBP.gov

What It Means

Import duties are taxes that a government collects on goods that enter its country from abroad. These taxes are usually paid by the importer and are collected by customs officials at ports of entry before goods can legally enter the country.

Common Types of Import Duties

The U.S. uses several different types of import duties, which serve different purposes:

Regular (MFN) Duties

  • Most Favored Nation (MFN) rates - Standard duty rates applied to imports from WTO members
  • Preferential rates - Lower or zero duties under free trade agreements (USMCA, etc.)

Typical rates: 0-10% for most industrial goods, higher for agricultural products

Special Duties

  • Anti-dumping duties - Applied to products sold below fair market value
  • Countervailing duties - Offset foreign government subsidies
  • Section 301/232 tariffs - Address unfair trade practices or national security concerns

Typical rates: 10-200+% depending on the case and product

The Import Duty Process

1

Classification

The importer or their customs broker determines the correct HTS code for the imported product. This code determines the applicable duty rate.

2

Valuation

The customs value of the goods is determined, typically based on the transaction value (the price actually paid or payable for the goods).

3

Entry Filing

The importer files an entry with U.S. Customs and Border Protection (CBP), typically through a customs broker, declaring the goods and their value.

4

Duty Calculation & Payment

CBP calculates duties owed based on the classification, value, and origin of the goods. The importer pays these duties along with any fees.

5

Release & Post-Entry

After duties are paid, CBP releases the goods. Later, CBP may conduct post-entry audits to verify compliance with import laws.

Additional Import Fees

In addition to duties, imports into the United States are subject to various fees:

Merchandise Processing Fee (MPF)

  • Rate: 0.3464% of import value
  • Minimum: $27.23 per entry
  • Maximum: $538.40 per entry
  • Purpose: Covers CBP processing costs

Harbor Maintenance Fee (HMF)

  • Rate: 0.125% of import value
  • Applies to: Waterborne imports only
  • Minimum: No minimum
  • Purpose: Funds harbor maintenance and dredging

Important note: Even "duty-free" imports are still subject to these fees. The only true "fee-free" imports are personal shipments under the de minimis threshold ($800 as of 2025).

Historical Timeline

1789

First Tariff Act

The first U.S. import duties were established, raising 87% of federal revenue

1930

Smoot-Hawley Tariff Act

Raised import duties to historically high levels (≈59% on average)

1934

Reciprocal Trade Agreements Act

Began the movement toward lower tariffs through bilateral agreements

1947

GATT Established

U.S. joined the General Agreement on Tariffs and Trade, leading to lower duties

1988

Harmonized System Adopted

U.S. implemented the Harmonized Tariff Schedule, standardizing classifications

1994

Uruguay Round Agreements

WTO formation and further duty reductions on industrial products

2018-2023

New Tariffs Implemented

Section 301 and 232 tariffs significantly increased duties on many imports

Real-World Example

Import Scenario: Electronics from Japan

Let's walk through a practical example of import duties for a shipment of consumer electronics from Japan to the United States.

Step-by-Step Import Duty Calculation

Shipment Details

USD Values
Product: Wireless headphones
HTS Code: 8518.30.2000
Duty Rate: 4.9% (MFN rate)
Invoice Value: $100,000
International Shipping: $5,000
Insurance: $2,000

Duty and Fee Calculations

Step 1: Determine Customs Value
Invoice Value: $100,000
+ International Shipping: $5,000
+ Insurance: $2,000
Total Customs Value: $107,000

Customs value for duty calculation includes the product price, international shipping, and insurance.

Step 2: Calculate Import Duties
Customs Value: $107,000
× Duty Rate: 4.9%
Import Duty: $5,243
Step 3: Calculate Additional Fees
Merchandise Processing Fee (0.3464%): $370.65

$107,000 × 0.3464% = $370.65 (below maximum of $538.40)

Harbor Maintenance Fee (0.125%): $133.75

$107,000 × 0.125% = $133.75

Total Import Costs
Import Duty: $5,243.00
Merchandise Processing Fee: $370.65
Harbor Maintenance Fee: $133.75
Total Duties and Fees: $5,747.40

This represents approximately 5.37% of the customs value.

Alternative Scenarios

Let's compare how the import duties would differ under alternative scenarios:

Free Trade Agreement

If imported from Mexico (USMCA):

  • Duty Rate: 0%
  • Import Duty: $0
  • Fees Only: $504.40
Section 301 Tariffs

If imported from China:

  • Regular Duty: 4.9%
  • + Section 301: 25%
  • Total Cost: $32,004.40
De Minimis Shipments

If split into small packages:

  • Section 321: No duties on shipments under $800
  • Restriction: Must be legitimate separate shipments
  • Warning: Intentional splitting is illegal

This comparison illustrates how significantly the country of origin and applicable trade policies can affect the total import cost. Smart sourcing decisions can lead to substantial duty savings.

Calculate Import Duties and Fees

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Need help with import duties compliance?

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Frequently Asked Questions

To determine the correct duty rate, you need to: 1) Find the proper HTS code for your product in the Harmonized Tariff Schedule of the United States, 2) Determine the country of origin, 3) Check if any preferential rates apply based on free trade agreements, and 4) Verify if any special duties apply (antidumping, countervailing, or Section 301/232 tariffs). The U.S. International Trade Commission maintains the official HTS database online, but many importers use customs brokers to ensure accurate classification and duty assessment.

Yes, several legal strategies can help reduce import duties: 1) Source from countries with preferential trade agreements or GSP benefits, 2) Use duty drawback to recover duties paid on imported goods that are later exported, 3) Utilize Foreign Trade Zones for manufacturing, storage, or manipulation of goods prior to formal entry, 4) Take advantage of tariff engineering by designing products to meet lower-duty HTS classifications, and 5) File for duty exclusions when available for special tariffs. However, all strategies must be implemented properly and legally - misclassification or false claims of origin constitute customs fraud.

If CBP discovers that you've underpaid import duties, even unintentionally, they can issue a bill for the additional duties owed plus interest. For entries less than five years old, CBP can conduct post-entry audits and collect any underpaid duties. In cases of negligence or fraud, CBP may also impose significant penalties ranging from 2-4 times the duty amount for negligence and up to the domestic value of the merchandise for fraud. Willful violations can also lead to criminal prosecution. It's always best to voluntarily disclose and correct errors when discovered.

Yes, import duties can change with little notice. This creates significant risk for importers with long lead times. The most common scenarios for duty changes are: 1) Implementation of new Section 301 or 232 tariffs, 2) New antidumping or countervailing duty orders, 3) Expiration of trade preference programs, or 4) Changes in product classification rulings. To manage this risk, some importers use flexible supply chains, include tariff increase clauses in contracts, or obtain binding rulings from CBP to lock in classifications. However, even binding rulings don't protect against new special tariffs imposed for trade policy reasons.

While import duties, sales tax, and VAT are all forms of taxation, they differ in several key ways: 1) Import duties are charged only on imported goods, while sales tax/VAT applies to most goods sold domestically, 2) Import duties are typically charged to the importer at the border before goods enter commerce, while sales tax is collected from the end consumer at point of sale, 3) Import duty rates vary by product classification and country of origin, while sales tax/VAT rates generally apply uniformly to all taxable goods, and 4) Import duties often serve policy goals like protecting domestic industries, while sales tax/VAT primarily generates government revenue.

Key Facts

Legal BasisHarmonized Tariff Schedule of the U.S. (HTSUS)
Administering AgencyU.S. Customs and Border Protection (CBP)
Average U.S. Import Duty2.0% (trade-weighted average)
Collection PointPorts of entry (sea, air, land borders)
Annual RevenueApproximately $85 billion (FY 2023)