business ToolUpdated 2026-09-20

Customs Duty & Import Tax Calculator

Avoid surprise import fees. Calculate estimated customs duties and import sales tax/VAT on internationally shipped packages based on product value, freight costs, and tariff rates.

Formula & Mathematical Methodology

CIF = Value + Shipping; Duty = CIF × Duty%; VAT = (CIF + Duty) × VAT%

Most international customs authorities assess duties on the CIF value (Cost, Insurance, Freight). Sales tax or VAT is then levied on the combined CIF value plus customs duty.

Step-by-Step Worked Example

Scenario: $350 item, $45 shipping, 6.5% customs duty, 20% import VAT.

1. Calculate CIF customs value: $350 + $45 = $395.00.

2. Calculate customs duty: $395.00 × 6.5% = $25.68.

3. Calculate tax base: $395.00 + $25.68 = $420.68.

4. Calculate import VAT: $420.68 × 20% = $84.14.

5. Total import duties and taxes: $25.68 + $84.14 = $109.82.

6. Total landed cost: $395.00 + $109.82 = $504.82.

Final Calculated Result: $504.82 Total Landed Cost ($109.82 Fees)

Frequently Asked Questions

What is a de minimis threshold?

A de minimis threshold is the minimum monetary value below which imported shipments are exempt from customs duties and taxes (e.g. $800 in the United States, £135 in the UK).