Define what landed cost includes
Landed cost should end at a documented point: arrival at port, customs release, delivery to a warehouse or availability for sale. A complete warehouse-delivered view may include supplier price, origin transport, export documents, international freight, insurance, duty, import tax that cannot be recovered, brokerage, port or terminal charges, destination transport, inspection and inbound handling.
Do not include recoverable tax as a permanent cost, but do model its cash timing separately. Likewise, purchasing overhead and warehouse rent may matter for net profit without belonging in a shipment-level landed-cost comparison. A written boundary makes supplier and route comparisons consistent.
Match freight to its chargeable unit
Parcel and air freight commonly compare actual weight with dimensional or volumetric weight and charge the greater value. The divisor, measurement unit, rounding step and treatment of multiple packages come from the carrier or forwarder tariff. Use packed external dimensions, not product dimensions, and preserve each carton when a carrier rounds packages separately.
Ocean freight planning often begins with cubic metres and payload, but a rectangular container-load estimate is not a loading plan. Door opening, pallets, bracing, weight distribution, dangerous-goods segregation and operational gaps reduce usable capacity. Confirm the final plan with the forwarder and loading team.
Treat duty and import tax as rule-driven inputs
Duty depends on classification, origin, destination, customs value and trade measures. The commercial product name alone is not enough to establish a tariff code. Prefer a ruling or qualified customs advice for material imports. The calculator should accept a confirmed rate; it should not claim to determine classification or legal eligibility.
Import tax may use a base that includes customs value, duty and selected transport charges. Recoverability depends on registration and local rules. Keep duty, recoverable tax and non-recoverable tax on separate lines so margin and cash-flow views can use the appropriate treatment.
Allocate shipment cost to sellable units
A shipment can allocate shared cost by units, product value, weight, volume or another causal driver. Unit allocation is simple but can distort a mixed shipment containing products with very different freight usage or value. Use weight or volume for freight when appropriate, value for ad valorem insurance or duty, and document any manual allocation.
Use expected sellable units rather than shipped units when routine damage, loss or quality rejection is material. Keep the allowance visible and reconcile it with actual receiving results. Hiding expected loss inside a general surcharge makes it difficult to improve supplier packaging or carrier performance.
Worked shipment example
Assume 1,000 units cost 12 USD each. International freight is 2,400 USD, insurance and origin charges are 350 USD, duty is 5% of the applicable 12,000 USD customs value, and brokerage plus destination delivery is 650 USD. Before import tax, shipment landed cost is 16,000 USD: 12,000 product value, 2,750 transport and origin charges, 600 duty and 650 destination charges.
If receiving expects 2% damage, 980 units absorb the cost and estimated cost per sellable unit is about 16.33 USD, not 16.00 USD. Recoverable import tax should appear in a cash requirement view but not in permanent unit cost. Final invoices may also add storage, examination or demurrage, which should be recorded as variance rather than silently changing the original estimate.
Reconcile quote, entry and invoice
After delivery, compare the forwarder quote, carrier invoice, customs entry, tax record, warehouse receipt and actual sellable quantity. Classify differences as rate, volume, weight, classification, delay, damage or missing-charge variance. Updating future assumptions from this reconciliation is more reliable than applying an arbitrary contingency percentage forever.
- Keep quoted and actual chargeable weight side by side.
- Separate recoverable tax from permanent cost.
- Record the allocation driver for every shared charge.