Import Duty Estimate Calculator accuracy and testing

Formula source

• Dutiable value = customs value + freight + insurance. Duty = dutiable value x duty rate. Tax/VAT = (dutiable value + duty) x tax rate. Landed cost = dutiable value + duty + tax/VAT + brokerage + processing + other fees.

Test cases

Known limitations

• This page documents the checked-in calculator logic and does not certify results for every real-world edge case.
• Use the result as a planning estimate unless the calculator page states a stricter purpose.

Assumptions

• Duty and tax rates are entered by the user and are not verified against customs schedules.
• Tax or VAT is applied to customs value plus freight, insurance, and duty in this planning model.
• Brokerage, processing, and other fees are treated as fixed shipment-level costs.
• This is a planning estimate only, not customs, tax, or legal advice.

Unit handling

• Customs Value accepts values in $.
• Freight Cost accepts values in $.
• Insurance Cost accepts values in $.
• Duty Rate accepts values in %.
• Tax / VAT Rate accepts values in %.
• Brokerage Fee accepts values in $.
• Processing Fee accepts values in $.
• Other Import Fees accepts values in $.
• Estimated Landed Cost is displayed as currency.
• Estimated Duty is displayed as currency.
• Estimated Tax / VAT is displayed as currency.
• Duty, Tax, and Fees is displayed as currency.

Rounding rules

• Number displays use up to 2 decimal places in the calculator UI.
• Currency outputs are displayed with standard US dollar formatting.
• Input precision follows configured step values where provided.

Version history

Change log