Direct AnswerDemurrage is charged when a carrier's container sits inside the port/terminal beyond its free time. Detention is charged when you keep the container outside the terminal (e.g., at your warehouse) beyond free time. Storage is a fee for goods or boxes dwelling in a warehouse/terminal. All three accrue daily and escalate — knowing your free-time windows and returning empties on time prevents them.
Key Takeaways
- Demurrage = container in port past free time.
- Detention = container out of port past free time.
- Storage = goods/box in warehouse past free time.
- Free time differs by carrier, port, and equipment.
- Per-day rates escalate the longer you hold.
- Plan pickup and empty return early to stay inside free time.
- Negotiate free time or use bonded/near-port storage if delays are likely.
Demurrage vs Detention vs Storage
| Aspect |
Demurrage |
Detention |
Storage |
| Where |
Inside port/terminal |
Outside terminal (your site) |
Warehouse / terminal yard |
| Trigger |
Box not cleared/cleared late in port |
Box not returned after free use |
Goods/box dwell beyond free period |
| Who controls |
Terminal / carrier |
Importer / trucker |
Warehouse / terminal |
| How to avoid |
Clear customs fast, pick up early |
Return empty on time |
Pre-clear, move goods out promptly |
| Cost pattern |
Daily, escalating |
Daily, escalating |
Daily, often lower but cumulative |
Decision Framework: Stay Inside Free Time
- Know your free time at destination (carrier + terminal).
- Schedule pickup promptly after arrival/cleared.
- Return the empty container on time to the right depot.
- Pre-clear customs to avoid terminal dwell.
- Monitor container dwell daily during the window.
- Request a free-time extension if a delay is unavoidable.
- Use near-port or bonded storage if you must hold goods.
Common Mistakes Importers Make
- Confusing demurrage and detention — they are triggered in different places.
- Missing the free-time window because nobody tracked the clock.
- Slow customs clearance leaving boxes in the terminal.
- Late empty-container return after unloading.
- Not monitoring dwell until the invoice arrives.
- Ignoring escalating tariffs that compound daily.
- No contingency for trucker or weather delays.
- Assuming free time is standard across carriers/ports.
FAQ — 12 Questions Overseas Buyers Actually Ask
What is the difference between demurrage and detention?
Demurrage is for a container sitting in the port/terminal past free time; detention is for keeping the container outside the terminal (e.g., at your warehouse) past free time.What is a storage charge?
A fee for goods or containers dwelling in a warehouse or terminal yard beyond the allowed free period.What is free time?
The number of days a carrier/terminal allows a container to sit (in port or with you) without charge, after which demurrage/detention begins.How much are these fees?
They are per-day and escalate; rates vary by carrier, port, equipment, and how late you are. Always confirm the tariff upfront.Who pays demurrage?
Usually the importer/beneficial cargo owner, unless a contract or forwarder error shifts liability.How do I avoid demurrage?
Clear customs quickly, pick up the container early, and keep communication tight with your forwarder and trucker.How do I avoid detention?
Unload promptly and return the empty container to the designated depot before free time expires.Can free time be extended?
Sometimes, by request and often for a fee or as a concession during disruptions — ask before the window closes.What causes storage fees?
Goods left in a warehouse/terminal beyond free days, often due to delayed pickup, clearance, or delivery instructions.What is per diem vs demurrage?
Per diem is a daily equipment-use charge (often synonymous with detention in practice); demurrage is specifically port/terminal dwell.Who is liable if the delay is the carrier's?
If the carrier/terminal caused the delay, charges may be waived or reallocated — document the cause and raise it promptly.How do I dispute these charges?
Provide evidence (arrival, clearance, return timestamps) and the tariff applied; route the dispute through your forwarder quickly.
Sources & References
- Carrier demurrage/detention tariffs — published per port/equipment.
- Terminal operator rules — free-time and storage policies.
- Incoterms 2020 — who bears delay-related costs.
Author: Batong Global Operations Team — Batong Global (batongls.com) monitors container dwell and free time across major lanes to keep importers clear of penalty charges. （建议替换具名专家 + 经验简介。） ---
Free-time penalties are avoidable with tight coordination. Let Batong Global track your containers and keep you inside free time from arrival to empty return.
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