Free Customs Duty & Import Tax Calculator

How is customs duty calculated?

Customs duty is calculated as a percentage of the customs value (typically CIF — cost + insurance + freight). The rate depends on the HS code of the product, the country of origin, and the destination country. Some products also attract additional duties like anti-dumping or countervailing measures.

What is the difference between customs duty and VAT?

Customs duty is levied by the importing country on the value of imported goods. VAT (or GST in some countries) is a consumption tax applied on top of the customs value plus duty. Both must be paid before goods are released from customs.

How do I calculate import duty from China to the US?

To calculate import duty from China to the US: (1) Find your 10-digit HTS code. (2) Check the applicable Section 301 tariff rate (7.5–25% depending on the product list) and add the flat 10% Section 122 surcharge. (3) Multiply by the customs value (FOB or CIF depending on the rule). Zentria Flow's calculator handles all Section 301 lists automatically — enter your HS code, select China as origin and United States as destination, and you get the full duty + VAT breakdown instantly.

What is import duty from Vietnam to the US?

Most Vietnamese goods enter the US at MFN (Most Favoured Nation) rates, which range from 0% to 32% depending on the HS code. Unlike China, Vietnamese goods are generally not subject to Section 301 tariffs, making Vietnam a popular sourcing alternative. Enter your specific HS code in Zentria Flow to get the exact rate for your product.

How do I use an HS code to calculate duty?

Enter your 6-digit (or longer) HS code in the Zentria Flow duty calculator, select the origin and destination country, and enter the shipment value. The calculator looks up the applicable MFN duty rate, any preferential FTA rate, anti-dumping duties, VAT, and other charges — then shows your total landed cost in seconds.

What is a landed cost?

Landed cost is the total cost of a product once it has arrived at the buyer's destination — including purchase price, freight, insurance, customs duty, VAT, broker fees, and any other import charges. It's the true cost of importing.

What is an HS code?

A Harmonized System (HS) code is a standardized numerical classification system for goods used by customs authorities worldwide. The first 6 digits are universal; countries may add additional digits for more specificity. HS codes determine the applicable duty rate for every imported product.

Is this calculator free?

Yes. You get 3 free calculations per day with no account required. For unlimited analyses, saved history, Document AI, and CFO-grade PDF exports, Zentria Flow Growth starts at $49/month.