Goods are ordered in one exchange rate world and arrive in another. Currency movement between purchase order, shipment, and duty assessment changes every layer of landed cost, and margins planned at order time quietly expire.
The goods are priced at the rate when the order was placed or invoiced. Freight and insurance may bill later at their own dates. Duty is assessed on a customs value converted at the rate customs prescribes for the entry date or period, which the importer does not choose. Each layer can use a different rate without anyone making an error.
That layering is why simple order date math fails. A finance team tracking one blended rate per shipment will always be slightly wrong everywhere, while a model that tracks the rate basis per cost layer can explain its variances instead of just reporting them.
Product cost is usually the largest layer, so a currency move against the buying currency raises the biggest number in the stack. But duty multiplies the effect, because duty is charged on a value that has already moved, and percentage based fees ride on top of both.
The pain concentrates in fixed price sales. Goods sold forward at a set price, especially to wholesale customers or through marketplaces with repricing friction, cannot pass the movement on. The swing comes straight out of margin, one shipment at a time, often below the threshold anyone reviews weekly.
Brands that buy currency forward or build a rate buffer into standard costs are not being conservative. They are deciding in advance who absorbs the swing: the plan or the month end surprise. Either choice can be right. Drifting into the surprise by default is the only wrong one.
Whichever approach is chosen, the landed cost model should carry it visibly: the planning rate, the hedge rate where one exists, and the actual rate per layer. Variance reporting that separates price, volume, and currency effects lets a team fix buying and pricing instead of arguing about arithmetic.
Suppliers may quote in your currency, in theirs, or with adjustment clauses tied to a rate band. Each option puts the swing somewhere specific, and suppliers charge for the risk they carry, visibly or inside the price. There is no free version, only a chosen one.
Renegotiate the currency terms when volumes change the balance. A brand that grew from occasional orders to a core program has the leverage to ask for banded pricing or shared movement terms, and the savings usually beat another round of haggling over unit price.
Shorten the gap where you can: faster order to ship cycles and quicker entry after arrival leave less time for rates to wander. Where the gap cannot shrink, price reviews tied to rate movement thresholds keep small swings from accumulating into a quarterly margin story.
Above all, revalue in transit inventory honestly. Stock on the water at last month rate is a comforting fiction. Knowing the true replacement cost of what you hold is what makes the next pricing and buying decisions real ones.
Keep reading: How do subscription orders change landed cost planning?, When does expedited air freight actually protect landed cost margin?, and How should landed cost handle warehousing and 3PL storage fees? cover the nearby cases in this series.
Because its cost layers settle at different times: goods at order or invoice, freight when billed, and duty on a customs value converted at the rate prescribed for entry. Each layer can legitimately use a different rate.
Duty is charged on the customs value, so when currency movement raises that value in local terms, the duty amount rises too, even at an unchanged rate. The swing compounds through the cost stack.
Not necessarily, but every importer should decide deliberately. Hedging, rate buffers in standard costs, or accepting the swing are all valid. The mistake is letting the swing arrive as an unplanned surprise in month end margins.
Variance reporting that separates currency from price and volume effects, with planning, hedge, and actual rates shown per cost layer. That separation turns arguments about numbers into decisions about buying and pricing.