I've watched importers negotiate for weeks to save $0.50 per unit on FOB, then lose $4.50 per unit on logistics they didn't understand.

They know their shell cost to the penny. They can recite their wheel specs from memory. But ask them what their landed cost is after freight, duty, demurrage, and inland trucking — and they give you a number that's off by 8–15%.

Here's where that 8–15% goes.

The Landed Cost Reality

Let's take a concrete example. You order 1,000 carry-on suitcases, FOB Shanghai at $28/unit. Total: $28,000. Here's what happens next:

The difference between best case and worst case is $11,990. That's 43% of your entire FOB order value. And here's the uncomfortable part: almost all of that variance is preventable.

The Four Costs Nobody Budgets For

1. Demurrage and Detention — The Budget Killer

You have typically 4–7 free days to pick up your container from the port. After that, demurrage kicks in at $100–200/day. Miss a customs document, have a trucking delay, or get flagged for inspection — and suddenly you're paying $2,000 in fees that weren't in anyone's spreadsheet.

How to prevent: Have your customs broker and trucking company lined up before the vessel departs Shanghai. Not when it arrives at LA/Long Beach. The clock starts the moment the container is discharged. Every hour between discharge and pickup that you spend 'figuring out logistics' is billable.

2. Customs Examination — Random, Expensive, and Under-Budgeted

About 3–5% of containers get flagged for CBP examination. If yours is one of them, you're looking at $800–1,200 for the exam itself, plus 3–7 days of storage during the exam, plus the demurrage that accrues while you wait.

How to prevent: You can't prevent the exam, but you can prevent the cascade. Accurate HTS classification, complete commercial invoice, and consistent declared values reduce your flag rate. More importantly, budget $1,200 per container as a contingency line item. If it doesn't get flagged, you keep the money. If it does, you're not scrambling.

3. General Average — The One That Sounds Made Up But Isn't

If a vessel has a major incident (fire, grounding, container collapse), the shipping line can declare 'General Average.' Every cargo owner on that vessel must contribute to the cost of saving the ship — proportionally to their cargo value. Even if your container is fine.

This is rare (maybe once or twice a year globally). But when it happens, the cost can be staggering. You'll be asked to post a bond (often 20–30% of your cargo value) to get your goods released. Without marine insurance, you pay this yourself. With insurance, your insurer handles it.

How to prevent: Marine insurance. It costs 0.3–0.5% of CIF value. For a $30,000 shipment, that's $90–150. It's the cheapest catastrophic risk insurance you'll ever buy.

4. HTS Classification Errors — The Retroactive Bill

Luggage is classified under HTS 4202. But within 4202, the duty rate varies dramatically depending on the outer surface material. Plastic/PC luggage might be 6.5%. Textile-covered luggage can be 17.6%. Aluminum could be 20%. Get it wrong, and CBP will send you a bill for the difference — retroactively, on every shipment you've ever made under that classification.

How to prevent: Get a binding ruling from CBP on your exact product before your first shipment. It takes 30–60 days, costs nothing to file, and eliminates classification risk permanently. Every experienced importer does this. Every inexperienced importer learns about it the hard way.

The Logistics Budget Rule

Here's the formula I give every new importer:

Landed cost budget = FOB x 1.25 (for planning purposes, to the US East Coast).

If your actual landed cost comes in at FOB x 1.18, you're under budget. If it comes in at FOB x 1.22, you're right on target. If you budgeted FOB x 1.10, you're going to have an uncomfortable conversation with your accountant.

The 25% multiplier covers freight, duty, insurance, port charges, inland trucking, and a 3–5% contingency buffer. It won't cover a CBP exam, demurrage, or general average — those need separate contingency lines.

The Incoterm That Changes Everything

If you're buying FOB, you own the risk from the moment the container crosses the ship's rail in Shanghai. If you're buying CIF, the seller arranges insurance and freight — but you still own the risk from arrival at the destination port.

For first-time importers, I actually recommend EXW or FCA — not because it's cheaper, but because it forces you to build your own logistics relationships. You'll pay more on your first shipment. You'll save exponentially more on every shipment after that because you'll understand the chain.

The worst Incoterm for a beginner is CIF with no logistics experience. It looks like the seller is handling everything. In reality, they're handling the cheapest possible version of everything — cheapest freight forwarder, minimum insurance, slowest routing. You get what they pay for, not what you need.