Detention and demurrage at the Port of Melbourne quietly drain margin from importers every single week. Most of these charges are avoidable. The two terms get used interchangeably, but they cover different parts of the process, attract different fees, and require different fixes. This guide explains what each charge means, how much you can expect to pay, and seven practical steps to keep your charges close to zero.
Detention vs demurrage: the quick answer
Demurrage is charged by the shipping line when your full container sits inside the terminal beyond its free time. Detention is charged when you keep the empty container outside the terminal beyond its allocated free time after delivery to your premises.
Demurrage clocks tick while the container is at the wharf. Detention clocks tick while the container is on the road, at your warehouse, or sitting empty in your yard waiting for return. Both are billed by the shipping line and both stack up daily.
What free time looks like at the Port of Melbourne
Free time varies by shipping line, container type and trade lane. As a general rule, importers can expect:
- Three to seven calendar days of demurrage free time at the terminal after vessel discharge.
- Three to ten calendar days of detention free time once the container is collected from the terminal.
- Reefer containers typically receive shorter free time (often two to four days) because of the cost of powered storage.
Check your bill of lading and the relevant shipping line’s terms. Free time on combined detention and demurrage contracts (often called “D&D”) works differently again and is worth requesting in writing before each shipment.
What you actually pay when the clock runs out
Fees escalate sharply after the first day of overrun. Indicative ranges for the Port of Melbourne in 2026 sit around:
- Demurrage day 1 to 3 over free time: AUD 100 to 200 per TEU per day.
- Demurrage day 4 to 7 over free time: AUD 200 to 350 per TEU per day.
- Demurrage beyond day 7: AUD 350 to 600+ per TEU per day.
- Detention day 1 to 3: AUD 80 to 150 per TEU per day.
- Detention day 4 to 7: AUD 150 to 280 per TEU per day.
- Detention beyond day 7: AUD 280 to 500+ per TEU per day.
A single 40-foot reefer that sits an extra ten days beyond combined free time can easily cost between AUD 8,000 and AUD 12,000 in stacked fees. For a regular importer moving 20+ containers a month, even small process improvements pay back fast.
Why importers get hit with these fees
Most detention and demurrage charges trace back to one of seven causes:
- Late or incomplete customs clearance documents.
- DAFF biosecurity holds and treatment delays (especially during BMSB season).
- Insufficient warehouse capacity to receive the container on the planned day.
- Equipment shortages (forklifts, side loaders) at the destination site.
- VBS slot availability at the terminal pushing collection out by days.
- Empty container return depot closures or quota restrictions.
- Poor coordination between freight forwarder, customs broker and transport provider.
The pattern is consistent: charges accrue when communication breaks down between the parties handling the container. Importers who use multiple uncoordinated providers carry more risk than importers running through a single integrated chain.
Seven practical ways to reduce detention and demurrage
Each of the following actions, done consistently, will measurably reduce your annual exposure.
1. Pre-clear before the vessel berths
Submit your import declarations and DAFF entries before the vessel arrives, not after. Pre-clearing means your container is ready for release the moment it is discharged. The first two days of free time are wasted if your broker is still waiting on documents from your supplier.
2. Book VBS slots early
Vehicle Booking System (VBS) slots at DP World, Patrick and VICT terminals fill quickly during peak periods. Have your transport provider lodge VBS bookings the moment containers are listed for collection. Late VBS bookings push pickup out by 24 to 72 hours and accelerate the demurrage clock.
3. Confirm warehouse readiness before collection
There is no point pulling a container off the wharf if your warehouse cannot devan it that day. Empty containers parked in your yard waiting to be unpacked accrue detention charges by the day. Align collection day with available unpack capacity.
4. Use a one-roof logistics provider where possible
When transport, fumigation, warehousing and dehire all sit with a single provider on a single site, the container never waits for a handover between companies. This is the structural fix to most detention and demurrage problems. It removes the gaps where charges accrue.
5. Plan for biosecurity holds during BMSB season
Between 1 September and 30 April, expect random and targeted DAFF interventions on cargo from BMSB risk countries. Build an extra three to five days of buffer into your delivery commitments during this window, and use a DAFF-approved facility that can perform onshore treatment without re-transporting the container.
6. Negotiate free time on high-volume contracts
If you ship more than 50 containers a year on one trade lane, negotiate extended detention and demurrage free time with your shipping line at contract renewal. Many lines will agree to seven to ten extra days for committed-volume customers, which absorbs almost all routine delays.
7. Track and audit charges every month
Detention and demurrage invoices contain errors. Charges are sometimes applied for days when the terminal was closed, when public holidays should have paused the clock, or when collection was attempted but VBS slots were unavailable. Audit every invoice and challenge anything that does not align with terminal records. Recoveries of 10 to 20 per cent on disputed lines are common.
How Datts Logistics helps importers stay ahead of these charges
Datts operates from a single Laverton North site that combines wharf cartage, DAFF-approved fumigation, container unpack, warehousing and dehire. Containers move from the Port of Melbourne to our depot, through any required biosecurity treatment, into storage and back out to the empty depot under one operational team.
That single point of control removes the most common cause of detention and demurrage charges, which is the gap between providers. Our drivers manage VBS bookings, our biosecurity team handles DAFF holds on the same pad, and our warehouse receives the container as soon as it clears. The container does not wait.
Frequently asked questions
Demurrage is the charge for keeping a full container at the wharf beyond free time. Detention is the charge for keeping the empty container outside the wharf beyond free time after delivery. Both are billed by the shipping line.
Most importers receive three to seven days of demurrage free time and three to ten days of detention free time. Reefer containers receive less. The exact number depends on the shipping line and the trade lane on your bill of lading.
Yes. Charges can be challenged where the terminal was closed, where public holidays should have paused the clock, or where VBS slots were unavailable. Keep records and audit every invoice.
It can, depending on the shipping line. Many lines stop the clock during DAFF-directed treatment but require evidence. Using a DAFF-approved facility that documents treatment timing properly makes that claim much easier.
Slow handovers between separate transport, fumigation and warehousing providers. Each handover adds a day, and each day adds cost. Running the full chain through one integrated provider closes that gap.
Talk to Datts about reducing your detention and demurrage exposure
If detention and demurrage charges are eating into your import margins, the fastest win is usually structural rather than operational. Datts Logistics moves containers from the Port of Melbourne to our DAFF-approved Laverton North facility, treats and stores them on site, and returns empties to the correct depot inside free time.
Call (03) 9398 2878 or email info@datts.com.au for a quote, or visit our transport and logistics page to see how we structure the work.
