Detention and demurrage charges—port holding fees once cargo sits beyond free time—typically consume 2–5% of landed cost for SME exporters, yet few audit them systematically. Unlike freight rates (which are quoted and renegotiated), detentions arrive buried in invoices months after clearance, when the shipment is already sold.
This article walks you through the mechanics: where detentions hide, how to isolate and quantify them, how Incoterm choice drives liability, and the operational levers (documentation speed, container return timing, freight consolidation) that directly control your port bill.
Advisory
Under FOB (Free on Board), the buyer assumes vessel responsibility and detention risk from port load onwards; under CIF (Cost, Insurance and Freight), the seller carries detention through to buyer's destination port. The difference is material: an exporter shipping on CIF to a congested port (e.g., Singapore) with 5-day free time (per terminal tariff SEATRADE or PSA rates, typically) will pay demurrage for day 6 onward at ₹4,000–₹8,000 per day per container, compounding quickly if the buyer delays customs clearance. Switching a lane from CIF to FOB transfers that exposure to the buyer but requires formal contract amendment and buyer acceptance—many SMEs remain on CIF by habit rather than calculation.
Indian major ports (Mundra, Nhava Sheva, Paradip, Chennai) publish terminal tariffs that define free storage/detention periods: typically 5 days for import containers, 3–5 days for export containers post-gate-in. Private terminals (Adani, Allcargo) often offer 7–10 days as a competitive offer. However, free time clock does NOT start on the day of arrival—it starts from the day the container is declared 'available' by the shipping line, which may lag actual discharge by 24–48 hours due to vessel delays or customs hold. Your freight forwarder's invoice will cite a 'free time start date'; cross-check this against the terminal's gate receipt (GR) date in your system. A two-day discrepancy on a 40-foot container at ₹5,000/day per day is ₹10,000 avoidable cost per shipment.
Detention accrues fastest during the 'document window': from container discharge to customs clearance completion. If your export invoice, packing list, or bill of lading carries a discrepancy (e.g., weight variance >5%, HS code mismatch, missing commodity certification), customs will place the container under 'examination hold', adding 3–5 days minimum to clearance time. A single misclassification under ITC(HS) that triggers physical inspection can add ₹15,000–₹30,000 in detention plus inspection charges. Preventive audit: assign one person (plant manager or QA lead) to pre-check invoice against packing list against BL before submission to forwarder. This 30-minute step, performed consistently, typically eliminates 40–50% of avoidable holds.
An SME shipping 120 containers annually (typical mid-market export unit) on CIF terms with a 15% detention-overrun rate due to documentation lag and free-time miscalculation carries a hidden annual cost of ₹36–₹60 lakhs in demurrage alone—money that flows to port operators, not into margins. Poor Incoterm selection on long-sea-freight lanes (e.g., CIF to
Frequently asked questions
Detention charges are port holding fees when cargo sits beyond free time. They typically consume 2–5% of landed cost for SME exporters, ranging ₹4,000–₹8,000 per container per day at major Indian ports.
Under FOB, the buyer assumes detention risk from port load onwards. Under CIF, the seller carries detention through to the buyer's destination port, making CIF significantly more expensive for congested routes.
Free time is the charge-free storage period at port terminals, typically 5 days for imports and 3–5 days for exports at major ports like Mundra and Chennai. Private terminals often offer 7–10 days competitively.