How Many Shipping Containers Are Lost at Sea Every Year?
Shipping containers are transported across the world’s oceans every day, carrying everything from electronics and clothing to machinery, food products and industrial equipment. With millions of containers moving around the world, one question often comes up: how many shipping containers are lost at sea every year?
According to the latest World Shipping Council (WSC) report, an estimated 1,478 shipping containers were lost at sea in 2025, compared with 576 in 2024. Around 280 million containers were transported globally during 2025, meaning the containers lost represented approximately 0.0005% of all containers transported.
Although the number can vary considerably from one year to another, containers lost at sea represent a very small proportion of global container transportation.
In this guide, we explain how many containers are lost each year, why containers fall overboard, what happens after a container is lost and how the shipping industry is working to reduce these incidents.
How Many Shipping Containers Are Lost at Sea Every Year?
The number of containers lost at sea changes from year to year because major storms, vessel incidents, fires and other individual events can significantly affect the annual total.
The latest WSC data provides a useful picture of the recent trend.
Shipping Containers Lost at Sea: Recent Statistics
| Year | Estimated Containers Lost |
|---|---|
| 2022 | 661 |
| 2023 | 221 |
| 2024 | 576 |
| 2025 | 1,478 |
The 2025 figure was substantially higher than the previous two years. However, the WSC notes that yearly totals can be strongly influenced by individual large-scale incidents. One incident in 2025 accounted for approximately 640 containers, or about 43% of the year’s total.
What Percentage of Containers Are Lost at Sea?
In 2025, approximately 280 million containers were transported globally and an estimated 1,478 were lost.
That works out to approximately 0.0005% of containers transported.
In other words, the overwhelming majority of containers transported by sea reach their destination without being lost overboard.
Why Are Shipping Containers Lost at Sea?
There isn’t one single reason why containers fall into the ocean.
Container losses can occur when several factors combine, including severe weather, large waves, vessel movement, cargo problems and equipment failures.
1. Severe Weather and Large Waves
Extreme weather is one of the major contributors to container losses.
Large ocean swells and powerful storms can cause ships to roll, pitch and experience significant forces. When a vessel encounters particularly challenging conditions, containers and their securing systems can be placed under considerable stress.
Rough Seas Can Create Extreme Forces
A container ship can carry thousands of containers stacked in multiple rows and tiers.
During heavy weather, the vessel can move significantly from side to side and from bow to stern. These movements place additional forces on containers and the equipment used to secure them.
2. Container Lashing Problems
Containers carried on deck are secured using specialized equipment, including twist locks, lashing rods and other securing systems.
If cargo is improperly secured, damaged equipment is involved or securing arrangements are compromised, containers can become vulnerable during severe vessel movement.
Why Proper Container Securing Matters
The safe transportation of containers depends on appropriate stowage and securing procedures.
The International Maritime Organization (IMO) notes that containers lost overboard can present hazards to navigation, other vessels and the marine environment.
3. Cargo That Is Incorrectly Packed
The condition of the cargo inside a container also matters.
Cargo needs to be properly packed and secured so that it does not shift excessively during transportation.
Cargo Movement Can Affect Container Stability
If cargo moves inside a container, it can change the forces acting on the container and contribute to problems with the overall cargo securing arrangement.
For this reason, proper cargo packing is an important part of container shipping safety.
4. Shipboard Fires
Fire incidents can also contribute to container losses.
A fire aboard a container ship can damage cargo, containers and securing systems and may require emergency measures.
The WSC identified fire-related incidents as one of the contributors to container losses in 2025.
5. Vessel Incidents
Groundings, collisions, structural problems and other serious vessel incidents can result in containers being damaged or going overboard.
In some cases, a large number of containers can be lost during a single incident.
How Many Containers Can a Cargo Ship Carry?
Modern container ships can carry enormous quantities of cargo.
According to the IMO, the largest container ships can carry more than 24,000 containers.
Why Container Ships Carry So Many Containers
Containerization allows cargo to be standardized and transferred efficiently between ships, trucks and trains.
A single ship can therefore transport thousands of containers during one voyage.
What Happens When One Container Falls Overboard?
When a container goes overboard, the consequences depend on its contents, location, weather conditions and whether it sinks, floats or remains partially submerged.
Some containers may eventually sink, while others can remain afloat for some time.
What Happens to Containers Lost at Sea?
A container lost overboard does not necessarily disappear immediately beneath the waves.
Its behavior depends on factors such as:
- Container condition
- Cargo weight
- Cargo type
- Water conditions
- Damage sustained during the incident
- Whether the container remains sealed
- Buoyancy of the cargo
Do Lost Shipping Containers Float?
Some containers can float temporarily, particularly when air remains trapped inside or when the contents provide buoyancy.
Other containers may sink relatively quickly.
Why Floating Containers Are Dangerous
A drifting container can become a navigation hazard for ships, fishing vessels and smaller recreational boats.
The IMO specifically identifies containers lost overboard as a potential hazard to navigation and marine safety.
What Happens When a Shipping Container Is Reported Lost?
Reporting a lost container is important because authorities and maritime organizations need to know about potential hazards.
Mandatory Reporting of Lost Containers
International requirements have been strengthened to improve the reporting of containers lost overboard.
The WSC reports that mandatory international reporting requirements came into force on January 1, 2026, requiring the reporting of containers lost at sea and containers observed drifting at sea.
Why Better Reporting Matters
Accurate reporting can help authorities:
- Warn other vessels
- Identify navigation hazards
- Coordinate recovery operations
- Monitor environmental risks
- Improve future safety measures
- Build better statistics about container losses
Are Shipping Container Losses Increasing?
The answer depends on the time period being considered.
Annual container losses can fluctuate considerably because a single major incident can dramatically change the yearly total.
Understanding the Long-Term Trend
The WSC’s historical data shows substantial variation between years.
The WSC reported a 10-year average of 1,274 containers lost annually in its 2025 report covering losses through 2024.
The 2025 total of 1,478 was above that earlier 10-year average, but the annual number should not be interpreted without considering individual incidents and the enormous number of containers transported globally.
Why One Year Can Look Very Different From Another
For example, only 221 containers were estimated to have been lost in 2023, while 1,478 were estimated to have been lost in 2025.
This illustrates why it is better to examine multiple years rather than using a single year’s figure to describe the entire container shipping industry.
How Does the Shipping Industry Prevent Container Losses?
Shipping companies, regulators and industry organizations continue to work on reducing container losses.
Improved Cargo Securing
Proper cargo packing and securing procedures are essential.
Containers need to be packed appropriately, while containers carried on deck must be secured according to applicable requirements.
Better Weather Planning
Weather forecasting allows vessel operators to identify potentially dangerous conditions and make operational decisions accordingly.
Route Planning and Severe Weather
Ships can sometimes alter their routes or adjust their operations when severe weather is expected.
This can reduce exposure to particularly dangerous conditions, although ocean voyages will always involve weather and sea-state risks.
Improved Container Safety Standards
International organizations continue to review container safety, cargo securing practices and reporting requirements.
The WSC has also supported research and industry projects designed to identify the causes of container losses and develop measures to reduce them.
How Many Shipping Containers Are Lost at Sea Compared With the Number Transported?
Looking at the percentage gives useful context.
In 2025:
- Approximately 280 million containers were transported globally.
- Approximately 1,478 containers were lost at sea.
- The estimated loss rate was approximately 0.0005%.
Why the Percentage Is Important
A headline about more than a thousand containers being lost can sound significant.
However, that number needs to be compared with the enormous volume of global container transportation.
The Majority of Containers Reach Their Destination
The vast majority of containers transported internationally arrive at their intended destination.
Container shipping remains one of the primary methods of moving goods around the world, connecting manufacturers, exporters, importers, retailers and consumers.
What Happens to Recovered Shipping Containers?
Not every container lost overboard remains permanently lost.
Recovery operations can sometimes locate containers or cargo following an incident.
Container Recovery
The WSC reported that 128 containers were recovered in 2025, the highest recovery figure recorded since it began collecting recovery data in 2023.
Can a Recovered Container Be Used Again?
That depends entirely on its condition.
A container recovered from the sea may have significant structural damage, corrosion, contamination or water damage.
It should therefore be professionally inspected before being considered for any future use.
What Does This Mean for People Buying Shipping Containers?
If you’re purchasing a shipping container for storage, construction or another project, the statistics about containers lost at sea provide useful background about the demanding environment these units are designed for.
However, not every used shipping container has the same condition or history.
Inspect the Container Before Buying
When buying a used container, consider checking:
- Doors and door seals
- Roof condition
- Flooring
- Corner castings
- Side panels
- Rust
- Previous repairs
- Structural condition
- Evidence of water penetration
For more information, read our Sea Container – The Complete Guide to Buying the Right Shipping Container.
Choose a Container Based on Your Intended Use
A container intended for general storage may have different requirements from one being converted into an office or home.
If you’re considering a container home, our guide How to Build a Sea Container Home: A Complete Step-by-Step Guide covers foundations, insulation, structural modifications, utilities and other important considerations.
How Much Does a Shipping Container Cost?
If you’re interested in purchasing a container after learning about the global shipping industry, price is naturally another important consideration.
Container prices depend on factors including:
- Size
- Condition
- Grade
- Container type
- Location
- Availability
- Delivery requirements
- Modifications
For a detailed breakdown, read our How Much Does a Shipping Container Cost? 2026 Price Guide.
Why Delivery Costs Matter
The advertised container price is not always the final amount you will pay.
Delivery can depend on distance, road access, unloading requirements and site conditions.
Calculate the Total Cost
Before purchasing, consider:
Total Cost = Container Price + Delivery + Site Preparation + Modifications + Applicable Fees
This gives you a more realistic picture of your overall investment.
Frequently Asked Questions About Containers Lost at Sea
How many shipping containers are lost at sea every year?
The number varies significantly from year to year. The latest WSC estimate says 1,478 containers were lost at sea in 2025, compared with 576 in 2024 and 221 in 2023.
How many containers were lost at sea in 2025?
An estimated 1,478 containers were lost at sea in 2025 out of approximately 280 million transported globally.
What causes shipping containers to fall into the ocean?
Major contributing factors include severe weather and ocean conditions, cargo and securing problems, fires and vessel incidents. The relative importance of these factors can vary between individual incidents and years.
Are shipping containers lost at sea dangerous?
Yes. Containers lost overboard can create hazards for navigation and maritime safety and can also present environmental risks depending on their contents and location.
Do all containers lost at sea sink?
No. Some containers can float for a period of time, while others may sink depending on their condition and cargo.
Can lost shipping containers be recovered?
Some can be recovered. The WSC reported 128 recovered containers in 2025.
How many containers can the world’s largest ships carry?
The largest container ships can carry more than 24,000 containers, according to the IMO.
Has container safety improved?
The historical data shows substantial variation, but the WSC has reported that recent losses remain well below some earlier historical levels. The industry continues to develop safety measures, reporting requirements and cargo-screening initiatives.
Final Thoughts: How Many Shipping Containers Are Lost at Sea Every Year?
So, how many shipping containers are lost at sea every year?
The answer changes every year.
The latest available World Shipping Council estimate reports 1,478 containers lost at sea in 2025, out of approximately 280 million containers transported worldwide. That’s approximately 0.0005% of global container movements.
While individual incidents can cause large spikes in annual losses, the number of containers lost remains extremely small compared with the enormous volume of global container transportation.
Understanding these statistics also highlights why proper cargo packing, container securing, weather planning, reporting and maritime safety standards are important.
If you’re looking to purchase a shipping container for storage, business use or a construction project, explore our complete sea container buying guide, learn how much shipping containers cost, or discover how to build a sea container home.