The biggest cost risk of peak season 2026 is not the freight rate spike. It’s demurrage and detention charges at the congested ports absorbing rerouted Hormuz cargo, where one delayed container can cost three to seven times more than the rate increase everyone is panicking about. Daily transpacific rates jumped from $1,000 to $1,800 per FEU after the June 1 rate increases, and that number is on every forwarder’s screen. The bigger bill arrives later, on an invoice nobody priced.
Why are demurrage and detention charges spiking in 2026?
The Strait of Hormuz has been closed to container traffic since early March 2026. Maersk, MSC, CMA CGM, and Hapag-Lloyd all suspended transits and redrew their networks. The cargo didn’t disappear. It now discharges at the ports just outside the strait: Khor Fakkan, Sohar, Salalah, and further out at Mundra, Nhava Sheva, and Colombo.
Those ports were never built for that volume. Xeneta’s congestion data shows Khor Fakkan locked at 100% congestion for more than ten days, Mundra departure delays up 72% (roughly eleven extra days), and arrival delays at Mundra reaching 49 days.
“Forty-nine days. That’s not a delay anymore. That’s a season.”
— Pauline Van Ostaeyen, The Dockflow Dispatch
Two definitions, because they get mixed up constantly. Demurrage is the terminal charge: your container sits at the port past its free time and you pay per day. Detention is the equipment charge: you picked the box up but kept the carrier’s container too long before returning it. Free time, the grace period before either clock starts, typically runs three to seven days depending on carrier, port, and contract.
And the clock starts at discharge, not at pickup. The moment the container comes off the vessel, free time starts counting, weekends included at most ports.
How much can one delayed container cost in demurrage?
Take one 40ft container arriving at Mundra right now. Worst case from the Xeneta data, it’s 49 days late. With seven days of free time, that leaves roughly 42 chargeable days. The 2026 industry benchmark guides put daily rates at major ports between $150 and $300 per container, with escalation tiers after the first few days.
That’s our own math based on those published ranges, and it lands between $6,300 and $12,600. For one box. Against the $1,800 rate spike, the hidden bill is 3.5 to 7 times bigger than the visible one.
Stack the full bill for a Gulf-linked shipment this month: roughly $3,200 base rate to the US West Coast (the late-May weekly average), $1,000 in peak season surcharge on a 40ft box, $1,500 or more in war risk surcharge if the routing touches the corridor, and the demurrage and detention exposure on top. Together they can double or triple the base rate, and only the base rate was on the quote your customer compared you on.
“You win the business on the visible number. You lose the margin on the invisible ones.”
— Michiel Gabriëls, The Dockflow Dispatch
The freight rate is the taxi fare you agreed upfront. Demurrage and detention is the meter that keeps running in traffic. Everyone negotiated the fare hard this month, and right now the traffic jam is 49 days long. Nobody is watching the meter.
Why do freight forwarders end up holding the demurrage bill?
Because the clock measures elapsed time, not fault. At the congested Gulf gateways (Khor Fakkan, Jeddah, Sohar, the eastern UAE ports), carrier advisories confirm charges start accruing from day five to seven of free time even when the terminal itself is the bottleneck. The box physically cannot move. The clock still runs.
The invoice also arrives late by design: it can only be issued after the box is picked up or returned, weeks after the routing decision that caused it. And it lands with the forwarder, who holds the carrier contract, pays first, and then tries to recover the money from the customer. On margins of a few hundred euros per box, one unrecovered detention invoice can wipe out the margin on ten shipments.
The scale is not small. The US Federal Maritime Commission tracked detention and demurrage billing at nine major carriers between April 2020 and March 2025: $15.4 billion. That was before this crisis. Xeneta’s chief analyst Peter Sand put the current situation bluntly: “No cargo owner is insulated from financial or operational risk.” That includes the forwarder in Antwerp who thinks Hormuz is far away: Xeneta already shows elevated dwell times at Colombo, Nhava Sheva, and Singapore.
What can freight forwarders do about demurrage exposure right now?
Five moves, all doable this week. None of them require the strait to reopen.
- Map your exposure today. List every container routed through Khor Fakkan, Sohar, Salalah, Mundra, Nhava Sheva, or Colombo. Pull the free time terms per carrier per port; they all differ. One ops person, two hours, one spreadsheet: container number, carrier, discharge port, ETA, free time days, daily rate after free time. Sort by exposure. Then assign the clock to someone by name. Rates have an owner. The clock usually doesn’t.
- Price the clock, not just the rate. Cap quote validity at June 30: contract shippers’ protection from emergency fuel surcharges expires July 1, and the new surcharges will be higher. Add detention risk language to every Gulf-linked quote. Four sentences: this routing transships at a congested port, free time is seven days, beyond that detention applies at cost at this daily rate, and we’ll flag you before it starts. No legal department needed.
- Pre-book inland transport at the discharge port. Fast onward movement is the only lever that actually stops the meter. If your box lands at Khor Fakkan instead of Dubai, the truck or feeder needs to be arranged before arrival, not after. That requires knowing the actual discharge port the moment it changes, which is a container tracking problem before it’s a trucking problem.
- Tell your customer before the invoice does. The forwarder who calls in June about detention exposure looks prepared. The one who forwards a surprise invoice in August looks asleep. Shippers don’t leave forwarders over a hard conversation. They leave over surprises.
- Track daily and dispute with data. This one deserves its own section.
How does the FMC rule change demurrage disputes in 2026?
The FMC’s detention and demurrage billing rule is fully operational in 2026. This is the first contract cycle where forwarders can challenge a charge with regulatory backing. Invoices on US trades must state the dates free time started and ended, within set timelines, and an invoice that doesn’t meet the requirements is one you can push back on. Most forwarders still don’t check. They just pay.
A winning dispute is timestamps: proof of when the container was actually discharged and when it was actually available for pickup. If the invoice says free time started Monday and your data proves the box wasn’t available until Friday, that’s money back. The rule covers US trades, but the playbook works everywhere. A carrier facing a dispute backed by clean timestamped data settles differently than one facing an angry email.
This is where tooling earns its keep. Tracking free time across thirty carriers and a dozen ports by hand is exactly the work that should be automated. Dockflow, a container tracking platform for freight forwarders, does this with automated demurrage tracking: it follows free time per carrier per port and alerts your team before charges start, with the timestamped milestone data that wins disputes. Gaurav Sethi, CEO of Intercont Freight Liners, put the manual alternative in perspective: “Before Dockflow, we needed 2 full-time employees to continuously monitor our shipments in transit.”
The takeaways
- The rate spike is the visible bill; demurrage and detention at congested ports is the hidden one, and per container it can be several times bigger.
- The clock runs on elapsed time, not fault, so the forwarders who map exposure, price detention risk, and pre-book inland moves this month will keep their margins.
- Timestamped tracking data now wins disputes under the FMC rule, which makes daily demurrage tracking a margin decision, not an admin task.
Everything you need already exists. The free time terms are in your contracts and the congestion data is public. If you’d rather not run the clock on a spreadsheet, book a demo and we’ll show you what automated free-time tracking looks like on your own lanes.
Frequently asked questions
What is the difference between demurrage and detention?
Demurrage is charged when a container stays at the terminal past its free time. Detention is charged when you keep the carrier’s container too long after pickup, before returning the empty. Both accrue per day and escalate the longer the box sits.
When does demurrage free time start counting?
At discharge, the moment the container comes off the vessel, not at pickup or arrival notice. Weekends count at most ports, so a terminal that takes four days to release a box has already used four of your free days.
How much are demurrage charges per day in 2026?
Industry benchmark guides for 2026 put major ports at $150 to $300 per container per day, with escalation tiers after the first few days of overstay. Exact rates depend on the carrier, the port, and your contract terms.
Can you dispute a demurrage invoice?
Yes. Under the FMC billing rule, fully operational in 2026, invoices on US trades must state when free time started and ended, within set timelines. If your tracking data proves the container wasn’t available when the invoice claims, you have grounds to dispute, and non-compliant invoices can be challenged outright.
