Customs Duty Calculator
Estimate the customs duty payable on an import. Enter goods value, freight, insurance and the duty rate to see the customs (CIF or FOB) value and duty due.
Updated 2026-06-14 · Free · No sign-up · Runs privately in your browser
Show the formula & steps
How the Customs Duty Calculator Works
When you import goods, the government charges customs duty based on the declared value of the shipment and the duty rate for that product. This calculator estimates the customs value and the duty payable. Enter the goods value, freight, insurance, and the duty rate, then choose whether duty is charged on the CIF value (goods + freight + insurance) or the FOB value (goods only).
The Formula
Customs value (CIF) = goods + freight + insurance Customs value (FOB) = goods value only Duty = customs value × duty rate %
Most of the world — the EU, UK, India and others — uses CIF. The United States, Canada and Australia generally use FOB, so international shipping and insurance are not part of the dutiable value.
Worked Example
Importing $1,000 of goods with $120 freight, $20 insurance, at a 6.5% duty rate on a CIF basis:
- Customs value = 1,000 + 120 + 20 = $1,140
- Duty = 1,140 × 6.5% = $74.10
- Goods + duty = 1,000 + 74.10 = $1,074.10
On a FOB basis the customs value would be just $1,000, giving $65.00 of duty.
What Affects the Duty Rate
| Factor | Effect on duty |
|---|---|
| HS tariff code | Sets the base rate for the product |
| Country of origin | Trade deals can cut or zero the rate |
| Customs value basis | CIF raises the base vs FOB |
| Anti-dumping / safeguard | Can add extra duty on top |
Duty is only one part of the bill — import VAT or GST and clearance fees are added afterward. Always confirm the exact rate against the destination country’s official tariff before you ship.
Frequently asked questions
How is customs duty calculated?+
Customs duty is the customs value of your goods multiplied by the duty rate for that product. In most countries the customs value is the CIF value, meaning the cost of the goods plus freight and insurance to the border. The duty rate depends on the product's HS tariff code and the country of origin.
What is CIF value?+
CIF stands for Cost, Insurance and Freight. It is the value of the goods plus the cost of shipping and insuring them up to the importing country's border. Most countries, including the EU, UK and India, assess customs duty on the CIF value rather than the goods value alone.
Do all countries use CIF for duty?+
No. The United States, Canada and Australia generally assess duty on the FOB value, which is the goods value at the port of export and excludes international freight and insurance. This calculator lets you choose CIF or FOB so the customs value matches your country's rules.
How do I find the duty rate for my product?+
Each product has a Harmonized System (HS) tariff code, and each code has a duty rate in the importing country's tariff schedule. Look up the HS code for your goods, then check the official customs tariff for the destination country and any trade-agreement preference that may reduce the rate.
Is customs duty the only import charge?+
No. Beyond duty you usually also pay import VAT, GST or sales tax, which is calculated on the customs value plus the duty, and sometimes excise taxes, processing fees or a broker fee. Use an import tax calculator to estimate the full landed cost.