Ask most importers what their product costs and they'll give you a landed cost number. FOB price plus freight plus duty plus customs broker fees — maybe drayage if they're thorough. That number gets entered into a spreadsheet, a margin gets calculated against it, and a buying decision gets made.
The problem is that landed cost is not the cost of selling a product. It's the cost of owning it — sitting in a warehouse, unavailable to anyone, generating no revenue. The cost of actually getting it to a customer and converting it to cash is higher. Sometimes meaningfully higher. And the difference between those two numbers is where more margin gets lost than most importers ever account for.
What Landed Cost Actually Measures
Landed cost measures the cost of moving a product from the factory to your warehouse. It includes everything required to get the goods across an ocean, through customs, off a truck, and into inventory:
- FOB price per unit
- Ocean or air freight per unit
- Customs duty per unit
- Customs broker fees per unit
- Drayage from port to warehouse per unit
At that point the product is in your warehouse and the landed cost calculation stops. But the costs don't.
What Fully Loaded Cost Actually Measures
Fully loaded cost measures the cost of moving a product from your warehouse to a paying customer. It adds three more layers on top of landed cost:
Warehouse handling costs — the fees your 3PL or internal warehouse charges to receive the shipment, put inventory away, pick individual units when an order is placed, pack them, apply retailer-required labels, and prepare the outbound shipment. These costs exist on every order regardless of whether you're shipping to a retailer or a DTC customer. They're in your 3PL contract. They're predictable. And they're almost universally absent from the cost models importers use to make buying decisions.
Storage costs — the ongoing cost of holding inventory while you wait for it to sell. Storage fees accrue daily or monthly, typically charged per cubic foot or per carton. A product that sits in a warehouse for four months before selling has accumulated four months of storage cost that never appears in the landed cost number. A product that moves in two weeks has accumulated almost none. The average of these two is not zero — and for importers managing seasonal products or slow-moving SKUs, storage cost is a significant and systematically ignored element of true product cost.
Outbound freight to the customer — the cost of shipping the product from your warehouse to the retailer's distribution center or the end consumer's door. For importers selling on pickup terms — where the customer arranges their own freight — this cost is zero. For importers paying freight to retail DCs or shipping DTC orders via parcel carriers, this is a real cost that varies by destination, by carrier, by shipment size, and by the terms negotiated with the carrier. It can range from negligible to significant depending on the category and the customer.
Why the Gap Between the Two Numbers Matters
The gap between landed cost and fully loaded cost is not a fixed number. It varies by product, by customer, by season, and by how long inventory sits before it sells. A small, light product with fast turns and a pickup customer might have a gap of a few percent. A large, heavy product with slow turns and a customer requiring freight delivery to a distant distribution center might have a gap of 15-20% of FOB cost or more.
When you make a buying decision at landed cost and the true cost of selling is fully loaded cost, you are systematically overstating your margin on every product in your line. The overstatement is not random — it's directional and consistent. Every GO decision made at landed cost that would be a NO-GO at fully loaded cost is a program that will underperform its margin expectation from the moment the purchase order is placed.
This is not a theoretical problem. It's the mechanism behind most of the margin surprises that show up at the end of a season — the programs that looked fine at the buy but came in below expectation when the books were closed. The landed cost was right. The fully loaded cost was never calculated.
The Storage Cost Problem Specifically
Storage cost deserves particular attention because it's the most variable and least tracked element of fully loaded cost.
A product that was bought with a 35% margin at landed cost and turns in 45 days has a very different fully loaded margin than the same product that turns in 180 days. The 45-day product accumulates minimal storage cost. The 180-day product has accumulated four months of warehouse fees that erode the margin progressively while the inventory sits. If that margin erosion isn't visible in real time — if no one is tracking storage cost per SKU as inventory ages — the damage is only discovered after the fact.
The importers who manage this well treat storage cost as a running cost that accrues against each SKU from the day it arrives in the warehouse. They know, at any given moment, what each product's true fully loaded cost is — not what it was when it arrived, but what it is today, after the weeks or months of storage it has accumulated. That real-time view is what allows them to make rational decisions about pricing, promotions, and when a product has crossed the line from slow-moving to genuinely problematic.
Building the Right Cost Model
The fully loaded cost model starts with landed cost and adds three structured layers: warehouse inbound and outbound handling, storage cost based on how long inventory is expected to turn, and outbound freight based on the specific customer's shipping terms.
None of these numbers are unknowable. Warehouse handling fees are in the 3PL contract. Storage rates are in the 3PL contract. Carrier rates are negotiated and fixed for a period. The only variable is how long inventory will sit — which is an estimate based on historical turns, seasonal patterns, and the size of the buy relative to expected demand.
The importers who build this model and use it consistently make better buying decisions than those who don't. Not because they have better instincts or better suppliers — but because they're making decisions against the right number.
How large is the gap between your landed cost and your fully loaded cost on your highest-volume SKU — and when did you first calculate it? We'd like to hear what the number revealed about how you were thinking about margin.