Use one formula before you compare suppliers
A practical planning formula is:
Landed cost = ex-factory cost + origin charges + freight + insurance + import duty and tax + destination charges + risk reserve
The formula is not a customs ruling and it does not replace a broker’s classification work. It is a decision model. Its job is to make hidden cost visible early enough that a team can change the price, pack size, route, order quantity or launch market before cash is committed.
The graphic above is illustrative, not a market quote. The percentages and amounts will change with product class, origin, destination, route, volume, service level, currency and the responsibilities agreed with the seller or buyer.
Separate cost from responsibility
Two shipments can have a similar physical cost and a very different commercial risk. Document the named place, the delivery term, who arranges transport, who provides customs information, who pays duties and taxes, and where the risk transfers. ICC’s Incoterms rules provide a common language for these responsibilities; they do not replace the sales contract, customs advice or local tax advice.
When comparing supplier quotes, put the delivery basis in the first column. “$20 per unit” is not comparable if one quote is ex works, one is delivered to a port and one includes delivery to a named warehouse. Write the term and place next to the number every time.
Model the variables that actually move margin
- Chargeable size: volumetric weight, carton dimensions and pallet utilization can move freight more than unit price.
- Classification: product description, material and tariff classification affect duty treatment; confirm the classification with a qualified customs professional.
- Currency: record the quote currency, conversion date and a sensitivity range for foreign-exchange movement.
- Minimums: separate one-off documentation, customs, inspection and handling fees from per-unit cost.
- Returns and claims: add a visible reserve for reverse logistics, damage, rework or uncollected shipments instead of treating them as surprises.
Run three scenarios, not one forecast
Build a base case, a delayed or expensive-freight case, and a volume case. In each scenario, show landed cost, gross margin, cash tied up, transit time and the break-even order quantity. A small table that exposes the sensitivity is more useful than a precise-looking single number.
For a new product, also model the first shipment separately from the repeat shipment. Samples, tooling, compliance checks, low-volume freight and launch packaging can make the first run unusually expensive. If those costs are spread invisibly across the entire product forecast, the team will not know whether the margin improved because the business improved or because the model averaged away the setup cost.
The pre-launch checklist
- Write the product description and expected classification in plain language.
- Collect carton dimensions, weights, pack quantities and the intended shipping mode.
- Ask for every quote on the same delivery basis and named place.
- Separate recurring, one-time and risk-based costs in the model.
- Have a customs or trade specialist verify assumptions before the first commercial shipment.
If the model cannot show who pays, when the cost appears and what can change it, it is not yet a landed-cost model.
Use the official ICC reference for the current Incoterms framework and obtain product- and country-specific customs advice before relying on a duty, tax or classification assumption.