Finance term
Demurrage
Also known as: port storage fee, container demurrage, detention fees
Definition
Demurrage is the fee charged by port terminals and ocean carriers when a shipper or consignee fails to pick up or return shipping containers within the terminal's free-time window (typically 3-7 days). Demurrage accrues daily and can escalate rapidly — often $150-$500+ per container per day. The FMC (Federal Maritime Commission) governs demurrage and detention practices. See fmc.gov for FMC demurrage rule 46 CFR Part 545 and ftc.gov for FTC supply chain oversight.
Detailed explanation
Demurrage is a port and ocean shipping charge triggered when cargo or containers remain at a terminal beyond the free-time period. In international trade, the terms 'demurrage' and 'detention' are often confused but are distinct:
- **Demurrage:** Charges for containers sitting at the port terminal past the free-time window. The terminal is occupying valuable real estate; demurrage compensates the terminal and carrier for that occupancy. Accrues from the moment free time expires until the container is picked up or returned. - **Detention:** Charges for containers that have been removed from the terminal but are not returned to the carrier's depot within the allowed free period. Detention compensates the carrier for equipment unavailability. - **Per diem:** A related charge for daily use of the carrier's container or chassis, typically for inland moves.
**Free time:** Carriers and terminals offer a contractual free-time window — typically 3-7 calendar days for imports, 3-5 days for exports — during which no demurrage or detention accrues. Free time begins when the terminal notifies the consignee that the cargo is available (the 'Last Free Day' notice). Once free time expires, charges begin.
**FMC demurrage regulation:** The Federal Maritime Commission (FMC) finalized Interpretive Rule on Demurrage and Detention (46 CFR Part 545, Rule 18-04) in 2020, establishing that demurrage and detention billing practices must be fair, reasonable, and not unreasonably restrictive. The FMC's 2024 Ocean Shipping Reform Act implementation rules (per OSRA 2022) further require carriers to publish clear demurrage and detention policies, provide dispute resolution access, and not charge demurrage when port/terminal inefficiencies prevent pickup. See fmc.gov for current FMC rules.
**Business impact:** For importers, demurrage is a direct cash cost that can reach tens of thousands of dollars per container on delayed port congestion events (e.g., the 2021-2022 U.S. port congestion crisis). For exporters, detention accrues when containers are loaded but not returned to the carrier on time. Businesses must account for demurrage exposure in their landed cost calculations and working capital planning.
**Demurrage and trade finance:** In letters of credit and documentary collections, demurrage fees can accrue before documents are released — particularly when banking delays slow document processing. Importers using trade finance instruments must ensure banking document turnaround is faster than the terminal's free-time window or pay demurrage from their own cash flow.
◈ Worked example
- Demurrage escalation: An importer's 3 containers arrive at a Los Angeles terminal on Monday. Free time: 4 calendar days (through Thursday). Due to customs examination delay, the importer cannot pick up until the following Monday. Demurrage rate: $250/container/day. Demurrage per container = 3 days × $250 = $750. Total demurrage for 3 containers = $2,250. On peak congestion days, demurrage rates may exceed $500/day/container.
- FMC dispute: An importer receives a $15,000 demurrage bill but argues that the terminal was inaccessible due to a chassis shortage within the terminal's control during the demurrage period. Under FMC Rule 46 CFR Part 545, demurrage should not be charged when terminal/carrier actions (not shipper actions) prevent container pickup. The importer files an FMC complaint at fmc.gov to dispute the charges.
- Demurrage in working capital planning: A small apparel importer receives 10 containers per month. Average demurrage risk: $1,500/container if customs holds occur (3% hold rate × $500/day × 10 days average hold). Expected annual demurrage reserve: 10 containers × 12 months × 3% × $5,000/container = $18,000/year. This is a line item in the importer's working capital budget.
Common questions
The most-asked questions about Demurrage — answered straightforwardly.
What is the difference between demurrage and detention in shipping? +
Demurrage is charged when a container sits at the port terminal past the free-time window — the fee compensates the terminal for occupied space. Detention is charged when a container has been removed from the terminal (by the importer or trucker) but is not returned to the carrier's depot within the allowed free period — the fee compensates the carrier for unavailable equipment. Both can accrue on the same shipment: demurrage before pickup, detention after pickup but before container return. The FMC's demurrage and detention rules (fmc.gov, 46 CFR Part 545) govern both.
Can demurrage charges be negotiated or disputed? +
Yes. The FMC's Ocean Shipping Reform Act (OSRA 2022) implementation rules require carriers and terminals to have accessible dispute resolution processes for demurrage and detention charges. Grounds for dispute: charges during periods when terminal congestion or carrier equipment shortages prevented pickup; incorrect free-time calculation; charges after consignee notified carrier of readiness but carrier failed to provide chassis/equipment; billing errors. File disputes promptly — many carriers have 30-day dispute windows. See fmc.gov for FMC complaint process.
How does demurrage affect business cash flow and financing? +
Demurrage is an unpredictable, high-velocity cash cost for importers. During port congestion events, demurrage can reach $10,000-$50,000+ per container for extended holds. For businesses financing inventory purchases through import lines of credit or trade finance, demurrage adds to the effective landed cost of goods — reducing margins on the affected inventory. Businesses should build demurrage reserves into working capital planning and ensure their banking arrangements (letters of credit, documentary collections) allow for fast document turnaround to minimize free-time exposure. Apply at ClearValue Lending to explore trade finance and working capital options.
Further reading
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