Demurrage & Detention: The #1 Import Cost That Destroys Budgets (How to Avoid It)

When importing a roll forming machine, the biggest financial risk at port is often not duty, freight, or VAT.

It is demurrage and detention.

Five to seven extra days at port can add thousands in unexpected costs — especially for heavy industrial equipment.

This guide explains:

• What demurrage really is

• What detention really is

• Free time explained

• Who pays under different Incoterms

• How to prevent charges

• A practical 7-day rescue plan if your shipment is stuck

What Is Demurrage?

Demurrage is a charge applied by the shipping line when a container remains at the port terminal beyond the allowed free time.

It applies before the container leaves the port.

In simple terms:

• Container arrives
• Free time starts
• If not collected in time → demurrage begins

Demurrage is charged per day and increases progressively in many ports.

What Is Detention?

Detention is charged when the container has left the port but is not returned to the designated depot within the allowed time.

It applies after the container leaves the port.

In simple terms:

• Container picked up
• Free time starts
• If not returned in time → detention begins

For roll forming machines, unloading delays often trigger detention.

What Is Port Storage?

Port storage is different again.

It is charged by the terminal operator (not the shipping line) when the container stays in the yard beyond free days.

In many cases, you can face:

Demurrage

• Port storage
  At the same time.

What Is “Free Time”?

Free time is the number of days allowed without charges.

It varies by:

• Port

• Shipping line

• Contract

• Season

• Incoterm

Typical free time ranges:

3–7 days at port
3–10 days for container return

Always confirm free time before shipment arrives.

Why Roll Forming Machines Are High Risk for Demurrage

Roll forming lines are:

• Heavy

• Complex

• Sometimes inspected

• Sometimes require special trucking

• Sometimes require crane scheduling

If customs clearance or unloading is delayed, charges escalate quickly.

Who Pays Demurrage & Detention?

Responsibility depends on Incoterm.

EXW / FOB / CIF

Buyer typically responsible.

DAP

Seller handles transport to site, but buyer may still face customs delays.

DDP

Seller usually responsible.

Always confirm in contract who pays.

How Demurrage Escalates

Charges often increase per day.

Example structure:

• Days 1–5: Free
• Days 6–10: $150/day
• Days 11–15: $250/day
• After day 15: $400/day

Heavy machinery delays can quickly exceed $3,000–$5,000.

The Most Common Causes of Demurrage

1. Customs entry not filed in advance

2. Incorrect paperwork

3. HS code disputes

4. VAT payment delays

5. Importer registration issues

6. Inspection holds

7. No truck booked

8. Factory not ready to receive

9. Crane not scheduled

10. Container cannot access site

Most of these are preventable.

How to Prevent Demurrage (Best Practices)

• ✔ Submit customs documents before vessel arrival
• ✔ Confirm HS classification early
• ✔ Arrange VAT/duty payment in advance
• ✔ Pre-book trucking
• ✔ Pre-book crane
• ✔ Confirm factory access
• ✔ Confirm unloading equipment
• ✔ Track vessel ETA daily
• ✔ Confirm container return location

Preparation is everything.

Realistic Clearance Timeline Planning

Before vessel arrival:

5–7 days prior:

• Send documents to broker

• Confirm duty estimate

• Confirm payment method

2–3 days prior:

• Confirm trucking availability

• Confirm unloading crew

Arrival day:

• Confirm customs entry submitted

The 7-Day Rescue Plan (If Shipment Is Stuck)

If your container is approaching free time expiry, act immediately.

Day 1 – Identify Blocker

Determine:

• Customs issue?

• Payment issue?

• Inspection delay?

• Trucking delay?

Call broker and forwarder directly.

Day 2 – Escalate

• Contact customs supervisor if needed

• Provide any additional documents immediately

• Confirm inspection schedule

Speed matters.

Day 3 – Secure Payment

If duty/VAT unpaid:

• Arrange immediate transfer

• Use urgent bank channel

• Provide proof of payment to broker

Day 4 – Pre-Book Collection

Even if clearance pending:

• Secure trucking slot

• Prepare factory access

• Confirm crane availability

Be ready to collect immediately after release.

Day 5 – Negotiate If Necessary

If delay caused by:

• Port congestion

• Customs hold beyond your control

Forwarder may request free time extension.

Not guaranteed — but sometimes possible.

Day 6 – Prepare Emergency Plan

If inspection ongoing:

• Request partial release if possible

• Confirm earliest pickup window

• Confirm container return depot

Day 7 – Act Immediately Upon Release

Once cleared:

• Collect same day if possible

• Unload promptly

• Return container immediately

Do not wait another day.

Container Return Strategy (To Avoid Detention)

After unloading:

• Confirm exact return depot location

• Confirm return hours

• Remove all packaging debris

• Sweep container clean

• Remove nails and screws

• Photograph container condition

Rejected container returns cause extra charges.

Hidden Demurrage Traps

• Vessel arrival earlier than expected

• Public holiday delays

• Weekend limited operations

• Incorrect consignee name

• Bank transfer delays

• Import license issues

Monitor shipment closely.

How to Build Demurrage Protection Into Budget

Add contingency of:

$1,000–$3,000 buffer

Especially for:

• First-time imports

• Used machinery

• Oversized lines

• High-congestion ports

Better to budget for it than panic later.

Key Takeaways

Demurrage and detention are:

• Time-based penalties

• Predictable

• Avoidable with preparation

They are often the largest unexpected cost in machinery imports.

• Control paperwork
• Control timing
• Control unloading

And you control demurrage.