Customs Value for US Imports: What Goes Into the Duty Base
Customs value is the base that makes duty estimates meaningful. If the value basis is wrong, the calculator output can look precise but still mislead the quote.
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Value basis
Keep the supplier invoice value, assists, discounts, and freight terms visible in the quote record.
Use consistent currency and note the exchange-rate source when conversion is required.
Do not mix product cost, freight, insurance, and local handling without labeling the duty base.
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Calculator impact
Duty, MPF, and landed cost all depend on clean value inputs.
When value assumptions are uncertain, show a range instead of presenting one number as final.
Next review step
Continue with product context
Estimates are for planning only. Confirm final classification and rates with a licensed customs broker or the relevant customs authority.
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