Demurrage

Definition

Demurrage is the charge a shipping line (or terminal, depending on the tariff structure) levies when a laden container remains inside the port/terminal beyond the free time granted on the import or export move.

It is a clock problem: every day the box sits after free time burns money, often escalating on a tiered daily rate.

Demurrage control is mostly document and appointment control. Ocean freight negotiation does not help if the delivery order, duties, or truck slot arrive after free days are gone. Separate demurrage from detention when you read invoices — they answer different custody questions.

Pakistan-specific notes

Practical context for WeBOC, Karachi Port Trust (KPT), Port Qasim Authority (PQA), and Pakistan Single Window (PSW) where relevant.

• At Karachi (KPT) and Port Qasim (PQA), peak congestion plus slow document surrender is the usual demurrage recipe.
• WeBOC holds, unpaid duties, or late delivery-order surrender can keep a box on terminal while free time expires.
• Carrier free-time offers vary by trade and equipment type — negotiate before the vessel arrives, not after day five.

Common mistakes

• Confusing demurrage (on terminal) with detention (outside terminal).
• Assuming “free time starts when I am ready,” not when the tariff says.
• Waiting for original B/L courier when telex/seaway options were available.
• Under-budgeting examination time on first-time HS codes.

Worked example

A 20′ import arrives Port Qasim with five free days. Day 0–1: vessel discharge. Day 2: GD filed but HS query raised. Day 4: query cleared, duties paid. Day 5: D/O surrendered, truck appointed for day 6 — first demurrage day. Cost: one day of demurrage that a same-day broker filing on day 1 would likely have avoided. MTX’s role is to sequence documents and trucking so free days cover real clearance time.

How MTX helps

We pre-alert document gaps, push early GD filing with your broker, and book trucks against real free-time clocks — not optimistic emails. When peak congestion hits Karachi, that sequence is usually worth more than shaving a few dollars off ocean freight. Operational tip: put free-time end dates on the same shared tracker as truck appointments. Demurrage is usually a calendar failure before it is a freight-rate failure.

Related terms

• Detention
• Bill of Lading (B/L)
• Goods Declaration (GD)
• CFS (Container Freight Station)
• WeBOC

Related guides

• Demurrage and detention traps at Karachi
• What the demurrage invoice actually means
• Import free time — negotiate before arrival

FAQ

Who invoices demurrage?

Usually the shipping line or its agent, sometimes passed through your forwarder. Read the invoice line items — demurrage and detention are often both present.

Does export cargo also demurrage?

Export boxes that sit too long at terminal after gate-in can incur terminal/storage style charges depending on carrier and terminal rules. Import demurrage is the more common surprise for new importers.

How do I reduce demurrage risk at Karachi?

Pre-alert documents before arrival, file GD early, arrange D/O and transport with buffer, and negotiate free time on tight equipment or peak sailings.

Is demurrage the same at KPT and PQA?

Tariffs and free-time offers differ by carrier and terminal. Always check the specific line’s Pakistan local charges for that voyage.