Ask an importer what a product costs them, and most will quote the factory price plus freight, maybe plus duty. That number is wrong — usually by enough to distort real decisions. Products that look profitable aren’t; the “expensive” supplier is sometimes the cheap one; and the damage hides because nobody ever reconciles the estimate against what the shipment truly cost.
A proper landed cost model isn’t complicated. It just has more lines than people want it to have. Here they are.
Line 1: Product cost — at the exchange rate you’ll actually pay
The FOB or EXW price is the obvious starting point, but even here there’s a trap: currency. Chinese suppliers price in USD but think in RMB, and you likely bank in euros or another currency. Between the day you agree the price, the day you pay the 30% deposit, and the day — five or six weeks later — you pay the 70% balance, exchange rates move. On a $20,000 order, a few percent of currency drift between deposit and balance is real money that never appears on any invoice; it just shows up in your bank account as a worse rate than you budgeted. Model the product cost at a conservative rate, not the friendliest one you’ve seen recently, and remember the balance payment is exposed for the whole production lead time.
Line 2: Freight — allocated the right way across a mixed container
Freight is a known number. What importers get wrong is the allocation. If your container holds ten SKUs and you spread the freight cost across them by value, you’re subsidizing the bulky products with the dense ones. Garden tools cube out — they fill a container’s volume long before its weight limit — so the honest method is to allocate freight by volume (CBM) per SKU, not by value or by piece count. A rake that occupies twenty times the space of a pruning shear should carry twenty times the freight. Allocate by value and your bulky items look artificially profitable while your compact items look worse than they are — and you’ll make range decisions backwards.
Line 3: Duty and import VAT — on the right value, at the right rate
Duty is charged on the customs value (broadly, goods plus freight and insurance, depending on your jurisdiction and shipping term), at the rate set by the product’s HS code. Three practical points. First, the HS code drives the rate, so a misclassified product is a silently wrong cost model. Second, trade agreements change the answer — a Serbian importer with a valid China–Serbia certificate of origin may pay a preferential rate or nothing, while the same goods without the certificate pay the full tariff; that document is worth actual percentage points of cost. Third, import VAT is usually cash-flow rather than cost if you reclaim it, but it still has to be financed at the border — which belongs in the next line.
Read More: Negotiating with a Chinese Factory like a Pro
Line 4: The cost of your capital
This is the line nearly everyone skips. Your money leaves in two pieces — the deposit at order, the balance at shipment — and the goods don’t turn back into cash until they’ve crossed the ocean, cleared customs, reached your warehouse and sold through. That’s easily three to five months from deposit to revenue on a sea shipment. Money tied up for a third of a year has a cost, whether it’s the interest on a credit line or the return that capital could have earned elsewhere. At any realistic rate, that’s another low-single-digit percentage on the order value. Small on paper; decisive when you’re comparing a local wholesaler (pay on delivery, sell next week) against direct import (pay months ahead). The comparison is only honest if capital cost is in the model.
Line 5: The defect and warranty allowance
No shipment is perfect. Even a passed inspection at AQL 2.5 means some percentage of units may be defective, and on top of that come transit damage and warranty returns from the field. If you sell 2,000 units and 2% are unsellable or come back, the remaining 98% have to carry their cost. Build a defect allowance into the per-unit model — 1–3% depending on the product and your quality history — and let actual data adjust it over time. This line is also where quality pays for itself visibly: a slightly dearer product with half the defect rate can be cheaper on a landed basis than the bargain that keeps coming back.
Line 6: The small print — the costs that arrive after the quote
Port and handling fees, customs brokerage, demurrage and detention risk if clearance runs slow, inland delivery to your warehouse, and inspection fees if you QC before shipment (you should — it’s cheap insurance on everything above). Individually minor; collectively another real line. The discipline is simple: after each shipment, reconcile every actual invoice against the model and update the numbers. Two or three cycles of that and your model stops being an estimate and becomes your real cost of goods.
Read More: What is Export Paperwork? And Why These Documents Matter
A worked example: how the cheap quote loses
Take one SKU, simplified. Supplier A quotes $2.60; Supplier B quotes $2.95 for a heavier-spec version of the same tool. On the quote sheet, A wins by 12%.
Now run the model. Both carry the same freight per unit — say $0.40 allocated by volume — and the same duty; call it 5% where it applies. Capital cost adds roughly 2% to each. But Supplier A’s product, on your own returns history, runs a 4% defect-and-return rate; Supplier B’s runs 1%. Spread across sellable units, A’s allowance adds about $0.11 per unit and B’s about $0.03. Add a failed-inspection re-check on A’s last order and the rework delay that pushed part of the shipment past the season’s start — a cost that never appears on any line but lands squarely on revenue.
By the time every line is filled in, the 12% gap has narrowed to low single digits — before counting the season risk — and the “expensive” supplier is the better buy. That is the entire point of the model: the quote is one line out of six, and it’s frequently not the line that decides.
The takeaway
Landed cost isn’t a formula you run once; it’s a discipline. Allocate freight by volume, respect the HS code and the certificate of origin, price your capital, budget for defects, and reconcile against reality after every container. Do that and your range decisions, supplier comparisons and retail pricing all stand on real numbers instead of a quote sheet.
We built a free Landed Cost Calculator that runs this model for you — plug in your product cost, volume, route and duty rate and see the true per-unit figure. And if you want the cost breakdown on a specific product from our range, ask; we’d rather you buy on the real number than the headline one.
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