How Many Shipping Containers Are Lost at Sea?

Around 1,478 shipping containers were lost at sea in 2025, out of roughly 280 million transported worldwide. That works out at about 0.0005 percent of all containers shipped, or fewer than one in every 100,000. The figure moves around from year to year, but the long-term picture is the same: losing a container overboard is genuinely rare.

This guide looks at how many containers are lost each year, why the number jumps about, what actually causes losses, and what happens to a container once it goes over the side.

How Many Containers Are Lost at Sea Each Year?

The most reliable figures come from the World Shipping Council, which has surveyed its member companies every year since 2011. Those members carry more than 90 percent of the world’s container traffic, so their data gives a sound industry-wide estimate.

Their most recent report put losses at 1,478 containers in 2025, up from 576 in 2024. Set against the roughly 280 million containers moved by sea each year, even the higher figure is a very small fraction of the total. The numbers rise and fall year to year, but across the long run, losses have consistently stayed a tiny proportion of everything shipped.

Why the Number Jumps About So Much

One year can look very different from the next, and the reason is that a single bad incident can dominate the whole total. In 2025, the loss of one vessel off the coast of India accounted for around 640 containers on its own, roughly 43 percent of the entire year’s losses.

That is why the annual figure is not a smooth trend. Most of the time, losses are low. Then one major storm or one serious vessel casualty can push a single year well above the recent average, as happened in 2025. It tells you more about a handful of isolated events than about a decline in day-to-day safety.

Why Are Containers Lost at Sea?

Containers end up overboard for a small number of well-understood reasons:

• Severe weather and rough seas. By far the biggest factor. Heavy swells, particularly in the North Atlantic and North Pacific, can cause a ship to roll violently and shift its load.
• Cargo shift and stack collapse. In rough conditions, stacks of containers can move, lean or collapse, taking others over the side with them.
• Fire. Onboard fires, sometimes linked to mis-declared or hazardous cargo, can lead to containers being lost or damaged.
• Major vessel incidents. Groundings, collisions and, in the worst cases, the loss of an entire ship account for the largest single-event totals.

• Improperly packed or overweight containers, and cargo that has not been secured correctly inside the box, can make all of these worse.

What Happens to a Container That Goes Overboard?

Most containers that fall overboard sink fairly quickly, though some can float for a time before going under, which is why they are treated as a hazard to navigation. Recovery is difficult, but it does happen: 128 containers were recovered in 2025, the highest figure since the World Shipping Council began tracking recoveries.

The rules around this tightened recently. From 1 January 2026, new international requirements under the SOLAS convention mean all containers lost or seen drifting at sea must be reported, with flag states passing the numbers to the International Maritime Organization. The aim is faster recovery and safer seas.

How Rare Is It, Really?

It is worth keeping the numbers in perspective. With around 280 million container journeys a year and roughly 1,478 lost, the loss rate sits at about 0.0005 percent. The overwhelming majority of containers complete their journey without incident, which is exactly what the global supply chain depends on.

The reason losses stay so low comes down to how containers are built and handled. Every unit is made to the same ISO standards, with strong corner castings that lock them together and let them be stacked and secured in a predictable way. Combined with modern lashing systems and weather routing, that engineering keeps the vast majority of boxes exactly where they should be, even on the largest ships. You can see just how many a single vessel handles in our guide to how many containers a ship can carry.

Built to Survive the Journey

The same toughness that helps a container survive years at sea is what makes it so useful on dry land. The units we supply are the same robust steel boxes, built to last and to weather the elements. We stock new-build and used containers across Sunderland, the North East, Teesside, Scotland and the Borders. Get in touch to find the right one for you.

Frequently Asked Questions

How many shipping containers are lost at sea each year?

According to the World Shipping Council, around 1,478 containers were lost at sea in 2025, up from 576 in 2024. Against roughly 280 million containers transported each year, that is about 0.0005 percent, so losses remain very rare despite year-to-year swings.

Why are containers lost at sea?

The main cause is severe weather and rough seas, which can make a ship roll and its container stacks shift or collapse. Fire, major vessel incidents such as groundings, and poorly packed or badly secured cargo are the other significant factors.

What percentage of containers are lost at sea?

Only about 0.0005 percent of the roughly 280 million containers shipped each year are lost, which is fewer than one in every 100,000. The overwhelming majority of containers reach their destination without any problem.

What happens to a container lost at sea?

Most containers sink fairly quickly, though some float for a while and are treated as a hazard to shipping. A small number are recovered, 128 in 2025, and from January 2026 new international rules require all lost or drifting containers to be reported.

Are container losses at sea increasing?

Not as a long-term trend. The 2025 total was higher than the previous two years, but that was driven largely by one major vessel loss rather than a general decline in safety. Across the long run, losses remain a very small and fairly stable fraction of global container traffic.