Your Guide to Navigating Demurrage and Detention Like a Pro
If you ship cargo internationally, you’ve likely come across the terms “demurrage” and “detention” on your invoices and thought, “What are these fees, and why are they so high?” You are not alone. Even experienced shippers struggle with understanding when these charges apply and how to avoid them.
At Southern Star Navigation, we regularly help clients who were blindsided by these charges simply because no one ever explained the timing rules clearly. This guide will break it down, offer real-world examples, and give you current insights based on the latest Federal Maritime Commission (FMC) regulations.
What’s the Difference Between Demurrage and Detention?
These two charges both come from delays, but they happen in different places during the shipping process.
- Demurrage happens inside the terminal, usually when a container sits too long and exceeds its free time at the port. This can occur for either an import or an export shipment.
- Detention happens outside the terminal and is a result of the container exceeding its free time prior to returning back to the carrier’s possession.
(Note: These simplified analogies are intended for general understanding and do not represent full regulatory definitions under 46 CFR § 541.)
Export vs. Import Timing Breakdown
Export Process
- Pick up an empty container
- Load it at your facility
- Return it full to the terminal
- Wait for it to be loaded on a vessel
If it takes too long to return the full container, that’s detention. If it sits too long at the terminal before loading, that’s demurrage.
Import Process
- Container is unloaded from the vessel at the port
- You arrange pick-up and move it to your warehouse
- You unload your cargo
- Return the empty container
If you don’t move the container out of the terminal fast enough, that’s demurrage. If you delay returning the empty container, that’s detention.
Common Causes of These Fees
Most of the time, these fees happen because something causes a delay. Some things are out of your control, but others can be planned for. Common triggers include:
- Port congestion
- Chassis or equipment shortages
- Delays in customs clearance
- No available appointments
- Missing or incomplete documents
- Unclear communication between partners
- Weather or labor-related slowdowns
We work with clients to get ahead of these issues before they turn into surprise charges.
How Much Do These Fees Cost in 2025?
There is no standard fee. Your cost depends on:
- Port or inland terminal used
- Carrier terms
- Container type
- Contracted vs. public rate
Most carriers offer 3 to 10 free days. After that, daily charges typically range from $75 to over $300 per container per day, depending on the carrier, container type, location, and service contract terms. In some situations, fees can be even higher. Inland Point Intermodal (IPI) moves may sometimes offer more free time, but this is not guaranteed. Some carriers count calendar days, which include weekends, while others count only working days.
*Not all carriers or ports offer the same amount of free time so it’s important to check your carrier’s public tariff and contract terms before your shipment moves.
The FMC Final Rule: Your Rights as a Shipper
On May 28, 2024, the Federal Maritime Commission’s Final Rule on Demurrage and Detention Billing Practices took full effect. It gives importers and exporters stronger protections and greater transparency.
Clear Billing: Invoices must include specific required information. According to the FMC’s Final Rule, any invoice for demurrage or detention must clearly show:
• Container number
• Bill of lading number
• Invoice issue date
• Allowed free time
• Start and end dates of the charge
• Applicable rule, tariff, or service contract clause
• Contact information for disputes
If any required field is missing, the billing party forfeits the right to collect the fee under FMC regulations.
Invoice Timing Requirements: The billing party must issue the invoice within 30 calendar days from when the charge stops accruing. This ensures timely billing and gives you clarity. Late invoices may be considered invalid under the rule.
Dispute Window: You have at least 30 calendar days from the date the invoice is issued to request a waiver, refund, or mitigation of charges. The billing party must respond within 30 calendar days. Failure to allow this window or failure to respond is a violation of FMC rules.
The FMC has already fined major carriers for violating these regulations, including charging for containers that could not be picked up or returned.
No Dual Billing Allowed: Under the FMC’s Final Rule, carriers and NVOCCs are prohibited from issuing demurrage or detention invoices to multiple parties at the same time. Only one billed party is allowed per invoice. This protection helps eliminate confusion over who owes what and prevents duplicate charges.
What to Do When You Can’t Return Containers on Time
Sometimes it’s not your fault. You can’t return a container if:
- The terminal has no available appointments
- The depot is full and won’t accept empties
- The terminal only accepts returns tied to a dual transaction
Here’s what you should do:
- Take screenshots of booking systems that show no availability
- Document all attempts to return the container
- Ask for alternate return depots
- Request waivers in writing
- File a formal dispute if needed, citing the FMC rule
7 Tips to Avoid or Reduce These Fees
- Don’t guess your free time. Look it up before your container hits the port.
- Clear customs ahead of time when possible.
- Stay updated on port and terminal conditions.
- Don’t cut it too close. Leave extra time for unexpected delays.
- Use live tracking tools to monitor everything in real time.
- Negotiate better terms if you ship regularly.
- Use off-site storage yards as a backup if your facility is at maximum capacity.
At Southern Star Navigation, we help clients build strategies around these steps and make sure they’re prepared long before a fee hits the invoice.
Who Pays: Clearing the Confusion
Even on door delivery or carrier haulage moves, you may still be responsible for detention or demurrage. Responsibility depends on:
- Who arranged the trucking
- Contract terms
- Which party had control over the container
The FMC clarified that charges must only apply to parties who had the ability to avoid the delay. If that’s not you, you shouldn’t be billed. We help clients clarify these roles before shipments move.
New Legal Update – September 2025
On September 23, 2025, the U.S. Court of Appeals for the D.C. Circuit struck down a key portion of the FMC’s 2024 rule. In World Shipping Council v. Federal Maritime Commission (Case No. 24‑1088), the court ruled that ocean carriers can bill motor carriers under carrier haulage agreements.
Originally, the FMC’s rule prohibited billing motor carriers in those cases. But the court found that inconsistent, since consignees without contracts could still be billed. The court deemed the restriction arbitrary and capricious because the FMC failed to justify treating motor carriers differently from consignees when applying its contractual relationship principle.
✅ What remains enforceable under the rule:
- 30-day invoice deadlines
- 30-day dispute windows
- Required invoice details
- Dispute resolution procedures
- Prohibition on dual billing
❗ What’s changed:
- Ocean carriers may now bill truckers with haulage contracts again.
Takeaway: Trucking companies and shippers should review who is contractually responsible for demurrage and detention charges in each move. Update your agreements and SOPs now to avoid confusion or disputes.
Reference:
Full court decision – World Shipping Council v. FMC (D.C. Cir. 2025)
Why This Matters More Right Now
With tariffs, blank sailings, and capacity limits still affecting the global market, demurrage and detention remain one of the few costs you can actually control.
Being proactive with your container timeline, your appointments, and your documentation is no longer optional. It’s how you stay competitive.
How Southern Star Navigation Helps You Stay Ahead
We’re not just a logistics provider. We act like your in-house support team. We’ll dig into the details with you. We’ll help build a plan that avoids unnecessary charges. And if a fee shows up that doesn’t make sense, we’ll work with you to get it sorted out.
We provide tailored, flexible logistics support with a deep understanding of the current regulatory environment.
Whether it’s your first international shipment or your thousandth, we can help you:
- Stay on schedule
- Reduce Risk
- Resolve charges before they spiral
If you’ve been burned by detention or demurrage, or you just want to ship smarter going forward, give us a call.
Southern Star Navigation 📞 833-782-7628 Ext. 1