Customs Duty Calculator
How Customs Duty Works
Customs duty is a tax imposed by a government on goods crossing its international border, calculated as a percentage of the goods' declared value. When a shipment crosses an international border, the importing country's customs authority assesses duties and taxes based on the type of goods, their declared value, and their country of origin. The purpose of customs duties is twofold: they generate government revenue, and they protect domestic industries from foreign competition by making imported goods more expensive.
Every person or business that imports goods into a country is potentially liable for customs duties. For consumer purchases, this includes items bought from overseas online retailers, goods carried in luggage when returning from travel, and gifts received from abroad. For businesses, duties apply to raw materials, components, finished goods for resale, and equipment imported for commercial use. The importer of record, typically the buyer or their appointed customs broker, is legally responsible for paying all applicable duties and taxes before goods are released from customs control.
Customs duty applies whenever the value of imported goods exceeds the destination country's de minimis threshold and the goods are not covered by a specific exemption or free trade agreement. In the United States, the de minimis threshold is $800, meaning shipments valued below this amount generally enter duty-free. However, recent policy changes have restricted de minimis eligibility for goods from certain countries. Most countries calculate duty on the CIF value (Cost, Insurance, and Freight), which includes the product price plus shipping and insurance costs, though the US typically uses the FOB (Free on Board) transaction value.
2026 US Tariff Landscape
The United States tariff environment has undergone dramatic changes in recent years. As of 2026, US tariff rates are at their highest levels in decades, driven by a combination of Section 301 tariffs targeting unfair trade practices, Section 122 executive tariffs applied broadly across trading partners, and sector-specific duties on steel, aluminum, and other strategic goods. The average effective tariff rate on US imports has risen substantially from the pre-2018 average of around 1.5%.
China-origin goods face some of the steepest tariffs. Combined Section 301 and baseline tariffs push the effective rate on many Chinese imports to approximately 44% or higher, depending on the product category. Categories such as electric vehicles, semiconductors, solar panels, and critical minerals from China face even higher rates. These tariffs have fundamentally reshaped global supply chains, with many businesses shifting sourcing to Vietnam, India, Mexico, and other countries to reduce duty exposure.
The economic impact on American households is significant. Multiple economic analyses estimate that current tariff levels cost the average US household between $1,500 and $3,800 per year in higher prices, depending on spending patterns and how much of the tariff cost retailers pass through to consumers. Categories most affected include electronics, clothing and footwear, furniture, toys, and automotive parts. Businesses face even larger impacts through higher input costs for manufacturing and increased prices on imported equipment and supplies.
Key Customs and Tariff Terms
| Term | Definition |
|---|---|
| Customs Duty | A tax imposed on goods when they are transported across international borders, based on the product type and value. |
| Tariff | A schedule of duty rates applied to categories of imported goods. Often used interchangeably with "duty" but technically refers to the rate structure. |
| HS Code | Harmonized System code, a standardized 6-to-10 digit number used internationally to classify traded products and determine applicable duty rates. |
| De Minimis | The threshold value below which imported goods are exempt from customs duties and taxes. Currently $800 in the US, though eligibility has been restricted for certain countries. |
| Country of Origin | The country where goods were manufactured or substantially transformed. Determines which tariff rates and trade agreements apply. |
| Section 301 | A provision of the US Trade Act allowing tariffs in response to unfair foreign trade practices. Used extensively against Chinese imports since 2018. |
| Section 122 | A provision of the Trade Act allowing the president to impose temporary tariffs of up to 15% for 150 days to address balance-of-payments issues, used for broad-based executive tariffs. |
| CIF Value | Cost, Insurance, and Freight — the total value of goods including shipping and insurance to the destination port. Used by most countries as the basis for duty calculation. |
| FOB Value | Free on Board — the value of goods at the point of loading, excluding international shipping and insurance. Used by the US as the primary dutiable value. |
Tariff Rates by Country and Category
Tariff rates vary dramatically depending on the product category and the country of origin. The table below shows representative effective tariff rates for goods entering the United States from major trading partners as of 2026. Actual rates depend on the specific HS code classification.
| Category | China | EU | Mexico/Canada (USMCA) | Vietnam |
|---|---|---|---|---|
| Consumer Electronics | 25-44% | 0-3.5% | 0% | 0-5% |
| Clothing & Textiles | 27-44% | 12-16% | 0% | 12-20% |
| Auto Parts | 27.5-44% | 2.5% | 0% | 2.5-5% |
| Steel & Aluminum | 25% + Section 232 | 25% Section 232 | 25% Section 232 | 25% Section 232 |
| Furniture | 25-44% | 0-2.5% | 0% | 0-5% |
| Food & Agriculture | 25-44% | 0-20% | 0% (most items) | 0-10% |
Practical Examples of Customs Duty
Importing Electronics from China
A business imports $10,000 worth of consumer electronics (laptops) from China. The base MFN duty rate for laptops under HS code 8471 is 0%, but Section 301 tariffs add 25%, bringing the effective rate to 25%. The customs duty would be $2,500 on the FOB value. If the business ships via ocean freight at $800 with $200 insurance, the total landed cost before any additional fees is $13,500. For electronics not covered by Section 301 List 1-4, the rate could be lower, making HS code classification critically important.
Importing Clothing from Vietnam
A retailer imports $5,000 worth of cotton shirts from Vietnam. Cotton apparel typically carries a base MFN duty rate of 16.5-19.7% depending on the exact classification. On a $5,000 FOB shipment, the duty would be approximately $825 to $985. Shipping and insurance of $600 are excluded from the US duty calculation since the US uses FOB valuation. However, if the same goods were imported into the EU, duty would be assessed on the CIF value of $5,600, resulting in a higher duty amount. Businesses sourcing from Vietnam often benefit from lower total landed costs compared to China despite similar base duty rates, because Section 301 tariffs do not apply.
Importing Auto Parts from Mexico
An auto repair shop imports $8,000 worth of brake components from Mexico. Under the USMCA free trade agreement, qualifying auto parts manufactured in Mexico enter the US duty-free, provided they meet the agreement's rules of origin requirements. The importer must maintain a USMCA certificate of origin documenting that the parts contain sufficient North American content. Without USMCA qualification, the standard MFN duty rate of 2.5% would apply, costing $200. For parts that incorporate Chinese components, origin determination becomes more complex and may affect USMCA eligibility.
How to Minimize Customs Duty Costs
Leverage free trade agreements. The US has FTAs with 20 countries, including USMCA with Canada and Mexico, and bilateral agreements with Australia, South Korea, Singapore, and others. Goods qualifying under these agreements often enter at reduced or zero duty rates. Proper documentation of origin is essential to claim preferential treatment.
Classify products accurately. HS code classification directly determines the duty rate. A product classified under one code might face 0% duty while a similar product under a different code faces 15%. Work with a licensed customs broker or request a binding ruling from CBP to ensure you are using the most advantageous correct classification.
Use Foreign Trade Zones (FTZs). FTZs are designated areas within the US where goods can be imported, stored, and processed without immediately paying customs duties. Businesses that manufacture in FTZs can import components duty-free and pay duty only on the finished product when it enters US commerce, often at a lower rate than the component rates.
Consider duty drawback programs. If you import goods and then re-export them (either in the same form or as part of a manufactured product), you can claim a refund of up to 99% of the duties paid through the US duty drawback program. This is particularly valuable for manufacturers that export a significant portion of their production.
Review your supply chain. With tariff rates varying dramatically by country of origin, shifting sourcing to countries with lower tariff exposure can produce significant savings. Many businesses have diversified away from China-centric supply chains to countries like Vietnam, India, Bangladesh, and Mexico to reduce duty costs while maintaining product quality.
Frequently Asked Questions
How do I find the correct HS code and duty rate for my product?
Every imported product is classified under a Harmonized System (HS) code, a standardized six-to-ten digit number used worldwide. In the United States, use the USITC Harmonized Tariff Schedule search tool to look up codes and corresponding duty rates. The EU uses the TARIC database, and most other countries publish their tariff schedules online through their customs authority. If you are unsure which code applies, you can request a binding ruling from US Customs and Border Protection, which provides a legally binding classification decision. Working with a licensed customs broker can also help ensure accurate classification and avoid costly misclassification penalties.
What is the difference between CIF and FOB value for customs purposes?
CIF (Cost, Insurance, and Freight) includes the product price plus shipping and insurance costs to the destination port. FOB (Free on Board) includes only the product price and costs up to the point of loading at the origin port. Most countries, including the EU, Australia, and Canada, calculate customs duties on the CIF value. The United States is an exception and generally assesses duties on the FOB transaction value, meaning shipping and insurance are excluded from the dutiable amount. This distinction matters because it directly affects how much duty you owe. Use our freight class calculator to help estimate your shipping costs.
What is the de minimis threshold and how does it work?
The de minimis threshold is the value below which imported goods are exempt from customs duties and taxes. In the United States, the threshold is $800 per person per day, one of the highest in the world. Canada's threshold is CAD 20 for duties and CAD 40 for taxes. The EU sets it at 150 euros for customs duties. However, recent policy changes in the US have reduced or suspended de minimis eligibility for goods from certain countries, particularly China, so it is important to check current rules before assuming an exemption applies. Many e-commerce platforms now collect estimated duties at checkout to avoid surprises upon delivery.
Who pays customs duties — the buyer or the seller?
Responsibility depends on the Incoterms agreed between buyer and seller. Under DDP (Delivered Duty Paid), the seller handles all import duties and taxes. Under DAP (Delivered at Place) or EXW (Ex Works), the buyer is responsible. Most international consumer e-commerce orders ship under DAP terms, meaning the buyer pays duties upon delivery. Business-to-business shipments often negotiate specific Incoterms in their contracts. Regardless of Incoterms, the importer of record is legally liable to the customs authority for unpaid duties, which is why using a customs broker is recommended for high-value commercial shipments.
How do Section 301 and Section 122 tariffs affect what I pay?
Section 301 tariffs are imposed by the US Trade Representative to address unfair trade practices by a specific country. The most significant Section 301 tariffs target Chinese goods, with rates reaching 25% on thousands of product categories including electronics, machinery, furniture, and consumer goods. Section 122 tariffs are imposed by executive order under the Trade Act and have been used to apply broad-based tariffs on imports from multiple countries simultaneously. These tariffs stack on top of normal MFN duty rates, so a product with a 5% base duty and a 25% Section 301 tariff would face a combined 30% rate. Checking for applicable special tariffs is essential before importing.
Can free trade agreements reduce or eliminate customs duties?
Yes, free trade agreements (FTAs) can significantly reduce or completely eliminate customs duties on qualifying goods. The United States-Mexico-Canada Agreement (USMCA) allows duty-free treatment for most goods traded between the US, Canada, and Mexico, provided they meet rules of origin requirements. Similarly, the EU has FTAs with dozens of countries. To claim preferential rates, importers must provide a certificate of origin or origin declaration proving the goods qualify under the agreement's rules of origin. Failure to properly document origin can result in full duty rates plus penalties. Use our currency converter to calculate costs in your local currency.