The one-paragraph takeaway
Container overtime charges come down to one sentence: the box is rented, and the terminal charges by the day. A full container left inside the terminal past its demurrage free time accrues demurrage (often discussed alongside terminal storage); once the full box is picked up, keeping it out past the detention free time before returning the empty accrues detention. The two can stack and escalate daily — in peak season, hundreds of dollars per container per day — and in abandonment cases can exceed the cargo value within months. Three gates keep you safe: negotiate enough free time at booking, clear customs early with clean documents, and track pickup and empty-return dates after arrival. This guide covers concepts → calculation → liability → carrier benchmarks → root causes → prevention and disputes → a pre-booking checklist.
1. First, Tell Demurrage, Detention and Storage Apart
Many disputes start with mixed-up terms — a client waves a terminal storage invoice asking why the "detention" is so high, when the two bills come from different parties. Look at the three states of a container:
| Charge | When it applies | Charged by | Basis |
|---|---|---|---|
| Demurrage | Full box inside the terminal: not picked up within the demurrage free time after discharge | Carrier (some ports: terminal bills storage separately) | Per container × day, full state |
| Storage | Cargo/container occupies terminal yard beyond free storage days | Terminal / depot | Per container or CBM × day |
| Detention | Full box already picked up: empty not returned within the detention free time | Carrier | Per container × day, equipment use |
- Memory rule: box still inside the terminal past free time → demurrage; box taken out and not returned → detention. Carriers often bill "D&D" together on one invoice, so always check the date ranges and status descriptions on the line items.
- Per diem simply means "per day" — a per diem line can be either demurrage or detention. Verify before paying.
- Why these charges exist: containers are carrier assets and terminal space is scarce. Free time is effectively a complimentary rental window; beyond it, tiered per diem rates compensate the asset owner for the loss of use.
Overtime charges are only part of the destination bill — D/O fees, DTHC, clearance fees and more are itemized in Destination Port Clearance & DDU/DAP Charges Explained.
2. How the Fees Are Calculated: Start Dates, Free Time and Tiered Rates
2.1 The timeline
An FCL import runs through four milestones that define the two free-time windows:
| Milestone | Event | What it triggers |
|---|---|---|
| T0 | Vessel berths; full container discharged (D/O available) | Demurrage free time starts (some carriers count from the "available for pickup" date) |
| T0 + free days | Full box still not picked up | Demurrage starts accruing, tiered per day |
| T1 | Full container gates out of the terminal | Demurrage stops; detention free time starts |
| T1 + free days | Empty not yet returned to the carrier's designated depot | Detention starts accruing until the empty is returned |
Counting rules matter: at most ports, weekends and holidays count as billable days in both free and chargeable periods; only some ports or carriers have calendar-day vs working-day distinctions. Whether day one is the discharge day itself also varies — a classic dispute point, so get your agent to confirm it in writing at booking.
2.2 Tiered rates: the longer you overstay, the more each day costs
D&D tariffs are almost always tiered and escalating, with peak-season surcharges on top. The table below shows typical industry magnitudes (indicative only) — the carrier's current tariff always governs:
| Period | 20GP (indicative) | 40GP / 40HQ (indicative) |
|---|---|---|
| First 4 days (within free time) | 0 | 0 |
| Chargeable days 1–5 | ~USD 50–75/day | ~USD 75–120/day |
| Chargeable days 6–10 | ~USD 75–120/day | ~USD 120–200/day |
| Day 11 onwards | ~USD 120–180/day | ~USD 200–300+/day |
2.3 A worked example: the cost of a 10-day delay
A 40HQ into a North European base port: 5 days demurrage free time, 5 days detention free time. Paperwork problems keep the full box in the terminal 6 extra days, and slow unloading delays the empty return by another 4 days:
- Demurrage: 6 days at escalating tiers (say 100/130/160 USD) ≈ USD 700–800
- Detention: 4 days at escalating tiers ≈ USD 400–500
- Total overtime cost above USD 1,100 — before any terminal storage or warehouse charges that may run in parallel.
In an abandonment scenario the meter runs for months, and the total exceeding the cargo value is not unusual — which is why the worst ending of runaway D&D is cargo abandonment and destination disposal (see destination clearance and abandonment risk).
3. Who Pays: Incoterms vs Who the Carrier Actually Bills
"Who should pay" and "who receives the invoice" are often different questions — the second-biggest source of D&D disputes.
| Term / scenario | Theoretical liability | Practical risk |
|---|---|---|
| FOB / CFR / CIF | Cost and risk pass to the buyer on shipment; destination D&D is the consignee's | With freight collect, or if the consignee refuses to pay, the carrier can pursue the shipper under the B/L contract and tariff |
| DAP (formerly DDU) | Buyer handles import clearance and pickup; buyer-caused delays are the buyer's | If the seller's documentation errors caused the clearance delay, liability can swing back to the seller |
| DDP | Seller runs the whole journey; D&D effectively lands on the seller | Quote DDP with destination free time and clearance timelines priced in, or overtime fees will eat the margin |
| Cargo abandonment | — | Carrier recovers demurrage, storage and disposal costs from the B/L shipper; totals often exceed cargo value |
Key insight: Incoterms allocate costs between buyer and seller only — they do not bind the carrier. The carrier bills according to the bill of lading and the prepaid/collect arrangement. FOB export never means "destination problems are not my problem" — cargo control (original/to-order B/L vs telex release) is the real firewall. See Bill of Lading Types Explained.
4. Carrier Free-Time Benchmarks (2026)
Each carrier sets free time by trade lane, equipment type and contract tier, and revises it often. The ranges below are indicative, for sanity-checking quotes — your booking confirmation and the carrier's current tariff always govern:
| Carrier | Demurrage free time (typical) | Detention free time (typical) | Notes |
|---|---|---|---|
| Maersk | 2–7 days | 2–7 days | Online free-time lookup and extension requests on most trades |
| MSC | 3–7 days | 3–7 days | Combined D&D offered on some trades |
| CMA CGM | 3–7 days | 3–7 days | Can shorten on hot lanes in peak season |
| COSCO Shipping | 3–10 days | 3–7 days | Longer free time negotiable for contract customers |
| Hapag-Lloyd | 3–7 days | 3–7 days | Paid free-time extensions on some trades |
| ONE | 3–7 days | 3–5 days | Longer free time on some US services |
| Evergreen | 3–7 days | 3–7 days | — |
| ZIM | 3–5 days | 3–5 days | Premium US express services have separate rules |
- US imports tend to carry longer free time (4–10 days demurrage is common) but higher per diem rates and exam rates; congestion in peak season quietly shortens the usable days.
- US regulatory note: under the Ocean Shipping Reform Act of 2022, the FMC's rule on demurrage and detention billing (effective May 2024) requires that invoices go to the consignee or shipper on the bill of lading, itemize the charges, and follow a defined dispute process with response timelines. If you receive a US-lane D&D invoice, check the billed party and the itemization against these requirements.
- Demurrage and detention free time usually run separately; a few carriers offer combined D&D — one total allowance from discharge to empty return — which suits inland deliveries. Ask at booking.
5. Six Root Causes of Overtime Charges
| Cause | Typical scenario | Fix (section) |
|---|---|---|
| 1. Clearance delays | Missing documents, classification or valuation disputes, consignee lacks import credentials | 6.1 Pre-file with clean documents |
| 2. Documentation / B/L issues | Original B/L not arrived, freight unpaid so no D/O, manifest mismatches | 6.2 Control the paper trail |
| 3. Customs exams | Exam queues and inspection eat the free days | 6.3 Exam-scenario buffers |
| 4. Consignee's own issues | No warehouse space, changed sales plan, payment dispute | 6.4 Pre-arrival confirmation |
| 5. Peak congestion | Terminal congestion, trucker shortage, hard-to-book pickup appointments | 6.5 Buffer at booking |
| 6. Abandonment | Buyer insolvent, balance unpaid, market price collapse | 6.6 Act fast, limit losses |
6. How to Avoid Them: Six Lines of Defense, Plus Disputes
6.1 Negotiate enough free time at booking
Big volumes, inland delivery points and slow-clearance destinations (US Midwest, European base ports) should have extended free time (e.g. 14/21 days) or combined D&D requested at booking and written into the confirmation. Negotiating beforehand is a commercial conversation; appealing afterwards is a legal one — an order of magnitude harder.
6.2 Accurate documents, originals first
As soon as the vessel sails, reconcile the B/L, invoice, packing list and certificate of origin. On lanes that need originals, count backwards from the courier tracking number so the paperwork beats the vessel. Manifest (AMS/ENS/AFR) error penalties and correction flows are covered in Export Booking End-to-End: AMS/ENS/AFR Explained.
6.3 Support pre-clearance at destination
Most countries accept pre-arrival filing (US ISF, EU ICS2). Well-documented cargo can clear while the vessel is still at sea, exchange the D/O and pick up almost immediately after berthing. The full flow is in the six-step destination clearance guide.
6.4 Sync with the consignee before arrival
Five to seven days before arrival, confirm three things with the consignee or destination agent: documents ready, duty funds ready, warehouse and trucker booked. Any hesitation on any item is your early-warning signal.
6.5 Buffer for exams and congestion
For exam-prone cargo (HS classification, origin, IP-related), budget free time on a worst case of "one week in exam". In peak season at hot ports, lock in truckers and pickup appointments early so the cargo isn't released but stranded.
6.6 Abandonment signals: decide within free time
At the first sign of refusal to take delivery, evaluate resale, return or compliant disposal — every day of hesitation costs hundreds of dollars. Cost recovery and cargo-control tools are covered in abandonment risk control.
6.7 Already billed? How to dispute
Don't pay a D&D invoice reflexively. Four steps: ① verify the billed days against the arrival notice and gate-out/gate-in records, stripping free time and calendar-rule errors; ② verify the rates against the carrier's published tariff, including whether peak surcharges were properly announced; ③ attribute the cause — carrier/terminal faults, customs exams and force majeure usually qualify for waiver mechanisms, while your own clearance delays rarely do; ④ dispute in writing through your booking agent within the invoice dispute window (US lanes fall under the FMC dispute process), with evidence attached. Success depends heavily on records, so make a habit of archiving arrival notices and gate records.
7. Pre-Booking and Pre-Shipment Checklist
At booking
- □ Demurrage / detention free days written into the booking confirmation; extension or combined D&D requested where needed
- □ Destination D&D tariff (tiers and peak surcharges) obtained from carrier/forwarder
- □ Exam-prone cargo buffered on a worst-case free-time basis
Documents and consignee
- □ B/L, invoice, packing list and origin certificate consistent; courier timeline for originals confirmed
- □ Consignee import credentials (EIN/EORI/Bond) and funds for duties verified
- □ Release method (original / telex / seaway) chosen based on buyer credit
After arrival
- □ D/O exchange, duty payment and trucking confirmed with consignee 5–7 days before arrival
- □ Arrival notices, exam notices and gate records archived (dispute evidence)
- □ Abandonment playbook (resale/return/disposal) triggered at the first refusal signal, before free time expires
8. What Mighty Shipping Can Do for You
- Free-time negotiation: leverage contract relationships with major carriers to secure extended or combined free time for regular shippers.
- Destination monitoring: milestone tracking from arrival, pickup and empty-return schedules synced with consignees, overtime risk flagged early.
- Invoice audit and disputes: verify days and rates before payment; file waivers for charges outside your control.
- Abandonment response: resale, return and disposal options compared and executed, keeping losses inside the free window.
- DDP cost control: door-to-door quotes that bake in free time and clearance timelines so overtime fees never ambush the margin.
Worried your destination free time won't be enough?
Send us the destination port, commodity, container type and expected clearance cycle. Our ops team will reply with free-time recommendations, a D&D cost estimate and a destination monitoring plan — before you ship, not after the bill.
Get AdviceFAQ
What is the difference between demurrage and detention?
Demurrage applies when a full container stays in the terminal past its free time without pickup; detention applies after pickup, when the empty box isn't returned within the free window. Both can hit the same shipment and escalate daily.
How many free days do I get, and when does free time start?
Typically 3–7 days each, with some US services at 10+; your booking confirmation governs. Demurrage usually starts at discharge (or availability); detention runs from gate-out to empty return. Weekends and holidays count at most ports.
Under FOB/CIF, can the shipper be billed for destination D&D?
Incoterms put the cost on the buyer, but carriers bill per the B/L: freight collect or a refusing consignee can leave the shipper liable. Assess the buyer's pickup capability and control cargo with original or to-order B/Ls.
Can demurrage and detention be disputed?
Yes — carrier or terminal errors, customs exams and force majeure usually qualify for waivers. Verify days and rates, attribute the cause, then dispute in writing through your booking agent with evidence. Self-caused clearance delays are rarely waived.
What is combined demurrage/detention?
One total free-time allowance from discharge to empty return instead of separate windows — more flexible for inland points and slow-clearance destinations. Ask whether your trade lane supports it and fix it in the booking confirmation.
If the consignee abandons the cargo, who pays?
The B/L shipper is party to the contract of carriage; carriers typically recover demurrage, storage and disposal costs from the shipper, often exceeding cargo value. Mitigate with cargo control, payment up front, contract clauses and fast disposal decisions.
References and Further Reading
- Carrier demurrage & detention tariffs and free-time rules (current published versions prevail)
- US Federal Maritime Commission (FMC) rule on D&D billing (OSRA 2022 implementing regulations)
- ICC Incoterms 2020 rules
- Related content from Mighty Shipping: Destination Port Clearance & DDU/DAP Charges, DDP Shipping Guide, Incoterms 2020 Explained, Bill of Lading Types, AMS/ENS/AFR Manifest Filing, Ocean Freight, Warehousing & Trucking
Disclaimer: This article is a general introduction to container overtime charges (demurrage, detention, storage). Free-time and rate ranges shown are indicative industry magnitudes; actual days, rates and counting rules follow each carrier's and terminal's current published terms and your booking confirmation. Regulations change frequently — verify against the latest official sources before making business decisions.