If you are a business owner, an online seller, or anyone who needs to move goods across borders, understanding sea freight is essential. It is the backbone of global trade, carrying over 80 percent of the world’s merchandise by volume. Sea freight is the most cost-effective option for large, heavy, or non-urgent shipments, but it requires careful planning. This guide explains what sea freight is, the different service types, how costs are calculated, transit times, and the step-by-step shipping process. Whether you are shipping furniture from Vietnam or electronics from China, these insights will help you make informed decisions and avoid common pitfalls.
Introduction
Sea freight (or ocean freight) is the transportation of goods via ships across oceans and seas. Unlike air freight, which prioritizes speed, sea freight focuses on capacity and cost efficiency. Goods are loaded into standardized containers—20-foot (TEU) or 40-foot (FEU)—that can be transferred between ships, trucks, and trains. Sea freight is ideal for bulk commodities, finished products, and anything that does not require urgent delivery. Understanding the options—Full Container Load (FCL), Less Than Container Load (LCL), and Roll-on/Roll-off (RoRo)—helps you choose the right service for your cargo size, budget, and timeline.
What Are the Key Types of Sea Freight Services?
Full Container Load (FCL)
FCL means you rent an entire container exclusively for your cargo. This is the best choice if you have enough goods to fill at least half a 20-foot container (about 15 cubic meters). For example, a furniture brand shipping 500 chairs that occupy 20 cubic meters would use FCL. Benefits include lower per-unit cost, reduced risk of damage (since your goods are not mixed with others), and faster transit because the container moves directly from origin to destination without consolidation delays.
Less Than Container Load (LCL)
LCL is for smaller shipments that do not fill a whole container. Your cargo is combined with other shippers’ goods in one container. This works well for startups or smaller orders—for instance, 500 small gadgets taking up 5 cubic meters. The downside: LCL takes longer because the freight forwarder must consolidate multiple shipments at the origin and deconsolidate at the destination. There is also a slightly higher risk of damage when goods are packed together.
Roll-on/Roll-off (RoRo)
RoRo is used for vehicles (cars, trucks, buses) and large machinery that can be driven onto the ship. A car dealership importing 20 SUVs from Japan would use RoRo. The process is simple: vehicles are driven onto the ship, secured, and driven off at the destination. RoRo is often cheaper than container shipping for vehicles and avoids the need for specialized loading equipment.
How Is Sea Freight Cost Calculated?
Sea freight costs vary based on container size, route, and additional fees. Here is a breakdown of key components:
| Cost Component | Description | Average Cost Example (20ft container, China to USA) |
|---|---|---|
| Ocean Freight Charge | Main cost to ship the container | $800–$1,200 |
| Terminal Handling Fee (THC) | Port loading/unloading fees | $200–$300 |
| Documentation Fee | Bill of lading, customs forms | $50–$100 |
| Insurance | Optional cargo coverage | 0.5–1% of cargo value |
| Customs Duties | Import taxes | 2–10% of cargo value |
A real example: a toy seller shipped a 20ft container of toys valued at $20,000 from Shenzhen to New York. Total cost: $1,000 ocean freight + $250 THC + $75 documentation + $100 insurance (0.5%) + $1,000 customs duties (5%) = $2,425.
Pro tip: Book in advance to avoid peak seasons like Chinese New Year or pre-holiday rushes. A reliable freight forwarder can negotiate better rates and help you understand all fees upfront.
How Long Does Sea Freight Take?
Sea freight is slower than air freight, but transit times are predictable for major routes. Typical times (as of 2025):
- China (Shenzhen) to USA (Los Angeles): 18–22 days
- China (Shanghai) to Europe (Rotterdam): 28–35 days
- USA (New York) to India (Mumbai): 25–30 days
- Australia (Sydney) to Japan (Tokyo): 10–14 days
Delays can occur due to storms, port congestion, or customs holds. Ask your forwarder for a transit estimate that includes buffer days.
What Is the Step-by-Step Shipping Process?
Step 1: Choose a Freight Forwarder
A good forwarder handles paperwork, booking, and logistics. Look for one with experience in your industry—for example, if you ship food, they should know about temperature-controlled containers.
Step 2: Decide on Service Type (FCL/LCL/RoRo)
Based on your cargo size and urgency, select the appropriate service.
Step 3: Prepare Your Cargo
Pack securely. For LCL, use pallets to prevent damage. Label each package with contact info and destination address.
Step 4: Complete Documentation
Key documents include:
- Bill of Lading (BoL) : Contract between you and the carrier.
- Commercial Invoice: Value of goods for customs.
- Packing List: Quantity, weight, dimensions of each item.
Step 5: Cargo Pickup & Port Delivery
The forwarder arranges pickup from your supplier and delivery to the origin port.
Step 6: Ocean Shipping
Your cargo is loaded onto the vessel. Track it online using the BoL number.
Step 7: Customs Clearance & Delivery
At the destination port, the forwarder clears customs and arranges final delivery to your warehouse or store.
What Are Common Challenges and How Do You Solve Them?
Cargo Damage
Poor packing is the main cause. Use sturdy boxes, bubble wrap for fragile items, and pallets for LCL. Buy cargo insurance to cover losses.
Delays
Storms, port congestion, and paperwork errors cause delays. Book early, double-check all documents, and choose a forwarder with a reliable track record.
Customs Issues
Missing documents or incorrect product descriptions can hold up cargo. Work with a forwarder who knows local customs rules and provide accurate information on all forms.
Sourcing Agent Perspective
As a sourcing agent, I advise clients to treat sea freight as a strategic part of their supply chain. For large, non-urgent orders, FCL is almost always the most cost-effective. I recommend booking at least two months in advance during peak seasons to secure space and rates. For smaller businesses, LCL offers flexibility but requires a forwarder experienced in consolidation to avoid excessive handling. I also emphasize the importance of accurate documentation—errors on the commercial invoice or packing list are the most common cause of customs delays. By planning ahead and partnering with a reliable forwarder, you can minimize costs and ensure your goods arrive on time.
Conclusion
Sea freight is the most economical way to ship large, heavy, or non-urgent goods internationally. Understanding the differences between FCL, LCL, and RoRo helps you match the service to your cargo. Costs include ocean freight, terminal handling, documentation, insurance, and customs duties. Transit times range from 10 to 35 days depending on the route. The shipping process involves choosing a forwarder, preparing cargo, completing documentation, and managing customs clearance. Common challenges like damage, delays, and customs issues can be mitigated with proper packing, advance booking, and accurate paperwork. By mastering these fundamentals, you can use sea freight to grow your business efficiently.
FAQ
Is sea freight better than air freight?
It depends. Sea freight is cheaper for large, bulky shipments but slower. Air freight is faster and better for small, urgent items like medical supplies or high-value electronics.
Do I need a freight forwarder for sea freight?
It is not required, but highly recommended. Forwarders handle complex paperwork, port logistics, and customs clearance. They also often get better carrier rates than individual shippers.
What is the maximum weight for a sea freight container?
A 20ft container typically holds up to 28,000 kg of cargo. A 40ft container holds up to 26,000 kg (due to size restrictions). Check with your carrier for exact limits.
Can I ship perishable goods via sea freight?
Yes. Use refrigerated containers (reefers) that maintain a set temperature. Choose a carrier with reefers and experienced handlers for food or pharmaceuticals.
How do I track my sea freight shipment?
Most carriers provide online tracking using your Bill of Lading (BoL) number. Your freight forwarder can also send regular status updates.
Import Products From China with Yigu Sourcing
Sourcing products from China is only half the process; getting them to your destination safely and cost-effectively is the other half. At Yigu Sourcing, we help businesses not only find reliable manufacturers but also navigate sea freight logistics. We coordinate with trusted freight forwarders to manage container bookings, documentation, and customs clearance. Whether you need FCL for large orders or LCL for smaller shipments, we ensure your cargo moves efficiently from factory to port to your warehouse. Let us help you simplify your supply chain so you can focus on growing your business.