Use the customs value and rate confirmed for this entry
Enter the dutiable customs value in USD, then enter the effective ad valorem rate that applies to the product, country of origin and entry date. Customs value is not automatically the same as the supplier’s invoice total, CIF amount or the business’s landed cost. CBP valuation can require transaction-specific additions and exclusions. Confirm the value with your broker and supporting documents.
A combined rate may include multiple applicable ad valorem measures that have already been verified. Do not add a second tariff layer unless a broker or official entry instruction confirms that it applies. Specific or compound duties cannot be represented by one percentage.
Formula and checked example
Estimated duty = confirmed dutiable customs value × effective duty rate. The calculator rounds the duty once to the nearest cent. Value plus estimated duty adds the rounded duty back to customs value; it is a simple subtotal, not a complete amount due at release.
For a hypothetical entry with $10,000 of confirmed dutiable value and a verified 15% effective rate, the estimate is $10,000 × 0.15 = $1,500.00. Value plus estimated duty is $11,500.00. The 15% is an example input only and is not a rate recommendation for any product or origin.
What this estimate leaves out
The result excludes Merchandise Processing Fee, Harbor Maintenance Fee, excise taxes, VAT/GST, broker and port charges, freight, insurance, storage, carrier charges, AD/CVD, quotas and specific duties. It does not predict eligibility for a preference program or resolve Chapter 99 measures. The separate Cross-Border Landed Cost Calculator models broader shipment and per-unit planning costs using user assumptions.
Use the current USITC Harmonized Tariff Schedule and CBP guidance to research a classification and applicable rate, then ask a broker to confirm the entry facts. CBP says the duty rate depends on classification and facts provided; it can issue binding rulings for specific cases.
A practical review before using the result
1. Confirm the product’s US HTS classification and origin with your broker or authoritative trade records. 2. Check the tariff schedule and any additional measures effective on the entry date. 3. Confirm the dutiable customs value and currency conversion. 4. Enter the verified effective rate and customs value, then compare this multiplication with the broker’s entry estimate.
If the source documents give a per-unit, specific or compound duty, use the source’s line calculation instead of treating it as a percentage. Keep rate evidence and its effective date with your shipment records.