US Port Congestion Risk Rises as Carriers Expand Service Frequency

The Paradox of Capacity Expansion: Why More Services May Worsen US Port Bottlenecks

Ocean carriers are responding to post-pandemic demand recovery by ramping up service frequency to US ports—a strategic move that should theoretically improve supply chain reliability. Yet this expansion is raising alarms among logistics professionals who lived through the 2021–2022 congestion crisis: adding carrier services without proportional gains in terminal infrastructure capacity risks creating the very congestion the industry is trying to escape.

The underlying problem is structural misalignment. Carriers control their own scheduling and can deploy additional vessel calls to any port at will. Port authorities and terminal operators, however, operate within fixed physical constraints: berth availability, cargo-handling equipment, gate throughput, and storage capacity are not infinitely scalable. When carrier supply outpaces terminal productivity, the result is predictable: vessels queue at anchorage, containers dwell longer than planned, demurrage charges spike, and the entire supply chain experiences cascading delays and cost overruns.

Why This Matters Right Now

The current environment differs from routine seasonal congestion in three critical ways. First, the demand recovery is sustained rather than cyclical—e-commerce adoption and nearshoring trends have permanently elevated baseline import volumes. Second, carrier capacity has expanded significantly through new ship deployments and post-pandemic utilization recovery, meaning there is structural capacity to add services. Third, port productivity improvements have lagged behind volume growth—terminal labor challenges, truck congestion at gates, and insufficient intermodal connections remain endemic bottlenecks.

For supply chain teams, this creates immediate operational risk. Shipper decisions made today—carrier selection, port routing, inventory positioning—will directly determine vulnerability to a congestion spike. Companies that assume historical schedule reliability during carrier expansion phases often face penalties:

• Demurrage cost creep: Exceeding free time (typically 5–7 days) at US ports costs $100–$400 per container daily. A 50% increase in average dwell time translates to $500–$2,000 additional cost per shipment.
• Inventory carrying cost inflation: Extended transit times and port delays lock capital in-transit longer, increasing working capital requirements and opportunity costs.
• Distribution network strain: Delayed container arrivals force downstream fulfillment centers to carry excess safety stock or face stockouts, creating a false demand signal that distorts planning.

Strategic Imperatives for Supply Chain Professionals

The most sophisticated supply chain teams are already shifting behavior. Rather than accepting carrier schedules at face value, they are implementing real-time port congestion monitoring using terminal queue dashboards, vessel position tracking, and dwell-time analytics. This intelligence enables dynamic routing decisions: if a preferred gateway is congesting, shipper systems can automatically shift volume to alternative ports (Gulf Coast, East Coast) and factor the additional inland trucking cost against demurrage savings.

Second, contract renegotiation is critical. Service agreements should include guaranteed dwell-time commitments, with penalty clauses if carriers publish schedules they cannot reliably execute. The era of "best efforts" scheduling is over; supply chain professionals must demand accountability.

Third, consider port diversification as a permanent strategy. The concentration of US imports through LA/Long Beach and Oakland creates systemic risk. Developing relationships with secondary gateways—Savannah, Houston, Port of NY/NJ, or even Canadian ports for North American distribution—provides flexibility when congestion inevitably emerges at primary terminals.

Finally, invest in predictive modeling that simulates congestion scenarios before they occur. What does landed cost look like if dwell times spike 50%? How much volume should you reposition to mitigate risk? What trigger points warrant a shift to airfreight or alternative supply sources? These questions demand quantitative answers, not intuition.

Looking Forward: A Cycle Within a Cycle

Historically, port congestion follows a predictable pattern: demand rises, carriers add capacity, terminal productivity cannot keep pace, congestion peaks, then either demand softens or terminal productivity catches up. We are currently in the "carriers add capacity" phase. Supply chain professionals must assume that congestion will worsen before it improves, and position their organizations accordingly through diversification, monitoring, and contractual discipline. The window to make these adjustments is narrowing; once congestion materializes, pricing power shifts entirely to ports and logistics providers, eliminating negotiating leverage for shippers.

Source: Seatrade Maritime News