How international shipping actually works

Choosing the mode

Sea, air or road is not a preference. It is arithmetic between value, urgency and volume.

Sea freight is the default for anything that is not urgent and not extremely valuable relative to its size. It is the cheapest per unit of volume and the slowest, and on long-haul routes the difference between a good routing and a poor one is measured in weeks rather than days.

Air freight earns its cost in two situations: genuinely time-critical cargo, and goods whose value is high enough that the freight is a small percentage of the invoice. It is also worth pricing when a sea shipment would sit against a delay, a seasonal requirement or a production deadline — the comparison people forget is not air versus sea, but air versus sea plus the cost of being late.

Road freight covers Europe, and handles the first and last mile everywhere else. It is often the part of the journey that is planned last and causes the most avoidable friction.

FCL or LCL

A full container is not automatically the more expensive option. Below roughly 18 CBM, groupage is usually the sensible answer, and above it a full container generally wins — but that threshold is a starting point for a conversation, not a rule. Enough shipments come in under it and still make sense as FCL that the volume alone should not decide it.

What matters more than the threshold is what groupage does to your timings. An LCL shipment has to be deconsolidated at destination before it can be released, and door to door that typically adds around a week compared to a full container carrying the same goods. If the delivery date is tight, that week is often the difference — and it is invisible if you compare only the port-to-port transit times in the quote.

Transit times, honestly

Quoted transit times describe the sea leg in good conditions. The number you should plan against is the door-to-door one, and it is built from three parts.

Component	What to expect
Direct service	The fastest option, where one exists on your route. On long-haul lanes, direct and indirect can differ by several weeks.
Transhipment	Any service that changes vessel adds time, and adds a point where the shipment can be delayed rather than merely slowed.
Local handling	Add a few days on top of the port-to-port figure for collection, delivery and release — before customs.

On a long-haul route, a direct service and a badly routed transhipment can differ by close to a month on the same lane. That is why the cheapest quote is not always the cheapest shipment.

Then there is customs, which is the genuinely unpredictable part. Clearance requirements vary by destination and commodity, and if the goods are selected for inspection the timeline is no longer yours. That is not a reason to panic — it is a reason to build a margin into the promise you make your customer.

As a working rule, I add five to seven days on top of whatever the forwarder gives me before I commit to a date with the end customer. It is not pessimism. It is the difference between a shipment that arrives quietly and one that generates a week of phone calls, and it costs nothing to build in at the start.

What the price is actually made of

The single most common misunderstanding is treating the ocean or air freight rate as the cost of the shipment. It is one line among several, and it is often not the line that produces the surprise.

The costs that catch people out are almost always at destination: port charges, loading and unloading, the customs operation itself, and any inspection that follows. None of these are hidden — they are simply not in the freight quote, and an exporter who has never imported into that country has no reason to expect them.

As for the freight rate itself: it moves with the state of the world. Capacity, fuel, congestion and geopolitics set the level, and no logistics operator controls any of them. What can be controlled is everything around the rate — the routing, the timing, the container type, whether the paperwork is ready. In practice that is where the savings actually come from.

Incoterms

This is where I see the most confusion, and it is not confined to exporters and importers — plenty of forwarders handle Incoterms carelessly too. The result is that a term ends up on an invoice as a label, rather than as what it actually is: a division of costs and obligations between seller and buyer.

The clearest illustration is the difference between EXW and FCA.

Under EXW the goods are made available at your premises and everything after that is the buyer's problem. Under FCA you undertake to deliver the goods to a named place — a specific warehouse or terminal. That is a real obligation, and it involves a leg of local transport that you are paying for.

Which leads to the point that gets missed: an FCA price must be higher than an EXW price for the same goods, because it includes something EXW does not. Selling FCA at your EXW price means you are absorbing a transport cost you never accounted for.

Two habits prevent almost all of this. Name the place precisely: FCA on its own means nothing, FCA followed by a specific address means something. And check that the price on the invoice matches the term you have agreed — if you change the term during a negotiation, the price has to move with it.

Documents

Three documents travel with almost every international shipment:

• Commercial invoice
• Packing list
• Packing declaration, where the destination requires it

Depending on the commodity and the destination, more will be needed — certificates of origin, treatment certificates, product-specific documentation. Timber packaging generally has to meet the ISPM 15 standard; plastic packaging avoids the question altogether.

Here is the part worth internalising: the documents are rarely the problem. The speed is. Suppliers are slow to produce them, paperwork arrives after the goods have shipped, and a gap that would have taken five minutes to fix in the factory becomes a hold at the border. Chasing documents while production is still running is unglamorous, repetitive work, and it prevents more problems than any other single activity in this job.

Customs and inspections

An inspection sounds dramatic and usually is not. The authority indicates what intervention is required, a site is nominated where it can be carried out, the work is done, and if everything is in order the goods are released straight afterwards.

The cost varies enormously depending on what is involved, which is precisely why it cannot be quoted in advance. The time cost is more predictable than the money cost, and both are much easier to absorb if nobody has promised the end customer an exact delivery date.

Destination requirements

Every destination has its own rules, and some have seasonal ones — periods during the year when certain goods must be treated before shipping, for example. These requirements are published, stable and entirely manageable. They only become expensive when they are discovered after the goods have sailed.

The three things exporters discover too late

1. A missing document. Something required at destination was never requested from the supplier.
2. An incomplete document. It exists, but a reference, a declaration or a link to the consignment is absent, which makes it worthless at the border.
3. An import or export requirement nobody checked. A treatment, a certificate, a registration on the buyer's side.

All three share a shape: they are cheap to fix before the goods move and expensive afterwards. Nothing in that list requires special expertise to avoid. It requires someone to check, early, every time.

Is international shipping complicated?

Less than its reputation suggests. The requirements on most routes are not numerous — they are unforgiving about sequence. Almost everything that goes wrong goes wrong because a decision was taken in the wrong order: booking before classifying the goods, loading before treating them, producing documents after departure rather than before.

Understand the process once and it stops being complicated. That is the whole job.

This page describes how shipments work in general terms. Requirements vary by destination, commodity and season, and official rules always take precedence. Confirm the details of your specific consignment before shipping.