PortMiami

About PortMiami

PortMiami sits in Biscayne Bay at the mouth of the Miami River on a chain of artificially-created islands — Dodge, Lummus, and Sam's — that were originally formed inadvertently in the early twentieth century as spoil-disposal sites from the dredging of Government Cut, the channel that separates Miami Beach from downtown Miami. The modern seaport traces its institutional founding to Dade County Resolution Number 4830, approved by the Board of Commissioners on April 5, 1960, which authorised the construction of the consolidated seaport facilities on Dodge Island that became the operational footprint over the following decades. The port is operated today by the Miami-Dade County Seaport Department as a unit of county government — a sixth distinct governance model among the major US container gateways profiled on this site, distinct from the city-owned harbour departments of the Pacific complex, the bi-state interstate compact at NY-NJ, the state ports authorities of Georgia and South Carolina, the Virginia public-authority-plus- non-profit-operator model, the Texas independent political subdivision, and the bi-port Northwest Seaport Alliance.

Two pieces of recent infrastructure define the modern port operationally. The Port Tunnel, a one-billion- dollar capital project completed in 2014, carries traffic directly from the seaport under Biscayne Bay to Interstate 395 and the broader Florida highway network without routing trucks through downtown Miami surface streets — a meaningful improvement for the gateway's drayage operations and for the city traffic patterns alike. The Florida East Coast Railway connection into the seaport was restored under a 2011 federal TIGER grant programme at a cost of roughly forty-seven million dollars and reopened the on-dock rail capability that PortMiami had not had for decades. Together with a 2013-started Deep Dredge programme that brought the harbour to fifty-two feet of operating depth, those three projects gave PortMiami modern access infrastructure that matches its primary role as the Caribbean and Latin American gateway for the Southeast.

Primary cargo and trade profile

The five primary cargo categories registered for this gateway are apparel, consumer electronics, pharmaceuticals, agricultural goods, and other. The cargo-mix signature here is unlike any other US container port profiled on this site: the inbound flow is dominated by Caribbean and Latin American origins rather than the trans-Pacific or transatlantic flows that anchor every other port in this set. Pharmaceuticals arrive from Puerto Rico, the Dominican Republic, and other Caribbean manufacturing footprints for distribution into the South Florida and broader Eastern US healthcare distribution network. Agricultural goods arrive year-round as seaborne perishable cargo: Chilean grapes during the Southern Hemisphere growing season, Peruvian asparagus, Central American bananas and pineapples, and other refrigerated produce flows from the Caribbean and the northern coast of South America. (High-value cut flowers from Ecuador and Colombia, and fresh Mexican produce that crosses the land border, primarily move through other gateways — airfreight at Miami International Airport for flowers, and the Texas-Mexico land crossings for Mexican fresh produce.) Apparel imports include a meaningful Caribbean Basin Initiative slice from Honduras, the Dominican Republic, and Guatemala.

Trading-partner geography reflects that Caribbean and Latin American specialty directly. Brazil, Chile, Honduras, the Dominican Republic, Colombia, Peru, Ecuador, Costa Rica, and Mexico appear consistently among the top inbound flag-state origins in the PortMiami statistics in a way that they do not appear at any other US container gateway in this set. The Asian share is smaller and skews toward goods that clear here because of duty-free or preferential rules rather than because of carrier-service density. For category-level imported value the authoritative reference is the USITC DataWeb, and for PortMiami-specific statistics the cleanest source is the PortMiami business portal, which publishes annual statistics releases and the per-terminal documentation.

Harbor Maintenance Fee and CBP code

Every ocean container clearing at PortMiami pays the federal Harbor Maintenance Fee at 0.125% of declared cargo value, identical to the federal regime applied at every US ocean port. The statutory authority is 19 CFR §24.24, the collection mechanic is CBP at entry, and the receipts flow into the Harbor Maintenance Trust Fund used by the US Army Corps of Engineers to maintain federal navigation channels. At PortMiami the channel in question is Government Cut and the Biscayne Bay approach, which require ongoing maintenance dredging because of the relatively shallow natural bay bathymetry. The site reads the current rate from CBP CSMS #65741993 at every build so the figure displayed always tracks the Treasury publication rather than living as an inline literal.

PortMiami carries CBP Schedule D port code 5201 for entry-summary purposes. The four-digit identifier covers both container terminals administered by the Seaport Department and is what a Form 7501 filer enters into the district-and-port box for any vessel discharge at this gateway. The authoritative list of port codes is the current CBP ACE Appendix E Schedule D publication, refreshed periodically by CBP and cross-checked by this site on every data build.

Terminal handling and dwell fees

Non-federal cost lines at PortMiami follow the same three-bucket pattern used across the industry — terminal handling charges, demurrage on overstayed boxes, and chassis detention from the regional South Florida equipment pool. Indicative terminal handling sits around $275 to $450 per TEU at this gateway, roughly comparable to Oakland and the Southeast Atlantic envelopes. The Miami-Dade County Seaport Department publishes the master tariff at the PortMiami business portal, which links downstream to each marine terminal operator's per-service schedules.

Free time at the PortMiami container terminals typically runs four to five calendar days from vessel discharge before demurrage starts. The escalating-tier structure that follows is the standard industry model. Two Miami-specific operational notes worth flagging: first, the perishable cargo profile means cold-chain compliance and reefer-plug availability are critical for produce and pharmaceutical shipments, and importers should confirm reefer slot availability with their carrier before discharge — temperature excursions on perishable cargo dwarf any per-container dwell fee in real-world cost. Second, hurricane season affects PortMiami operations more directly than any other gateway in this set because of the South Florida location at the entrance to the Gulf Stream; importers planning August-through-October arrivals should budget contingency for channel closures. Chassis detention from the regional pool invoices separately, as everywhere; the most durable defence against the dwell stack remains pre-filing the entry and pre-paying duties so release happens the same day customs status flips to paid.

Sourcing decisions: PortMiami versus other US container gateways

For an importer or exporter routing Caribbean, Central American, or northern South American cargo, PortMiami is almost always the correct US container gateway. Sailing time from any Caribbean or northern Latin American load port to Miami is meaningfully shorter than to any other US port in the set, and the carrier rotation density on Caribbean and Latin American services is concentrated here in a way that it is not at any of the other gateways. Houston is the only meaningful US container alternative for that flow, and even Houston is a substantially longer transit from most Caribbean origins. Conversely, for trans-Pacific cargo destined to the Southeast US, Savannah or Charleston are usually more efficient than routing through PortMiami because of the Caribbean-Latin-American-rotation specialty of the Miami carrier portfolio.

The country times product table further down this page lists the largest US importers of categories that typically move through this port, derived from the national trade picture rather than from a port-of-entry signal per pair. Treat the table as a discovery surface for which countries dominate the categories that flow through this gateway, rather than as a guarantee that any specific country's shipment routes through PortMiami. The federal duty stack on the calculator does not change with the gateway choice, but Caribbean Basin Initiative and other preferential-treatment rules that apply to many of PortMiami's primary trade origins can swing the all-in landed cost by more than the terminal-handling difference between any two US gateways combined.

Operators and infrastructure

Container operations at PortMiami are run by two primary terminal operators on long-term leases from the Miami-Dade County Seaport Department. The Port of Miami Terminal Operating Company (POMTOC) is jointly operated by SSA Marine and Ports America. APM Terminals operates the separate South Florida Container Terminal facility on Dodge Island. The Seaport Department itself acts as the landlord and publishes the master tariff that applies across both container terminals. Beyond the container operations the seaport is also the largest passenger cruise port in the world by passenger throughput, handling more than seven million cruise passengers in fiscal year 2023-24 — Carnival Cruise Line, Royal Caribbean, and Norwegian Cruise Line all maintain major operational bases here. The cruise berths sit on a separate part of Dodge Island from the container terminals, but the shared port infrastructure (gate access, tunnel capacity, security perimeter) creates operational cross-effects that an importer should be aware of when the cruise turnaround days fall on the same dates as a container vessel arrival.

Two further pieces of context distinguish the PortMiami operational picture. The first is the adjacent Miami International Airport (MIA), one of the largest air-cargo gateways in the Western Hemisphere by tonnage and the dominant US air-freight gateway for Latin American perishables and high-value electronics. Cargo can move between the seaport and MIA on short truck legs through the same county-owned infrastructure network, which gives the broader Miami logistics complex a multi-modal capability for time-sensitive cargo — perishable produce that arrives by air can be repackaged for ocean outbound, and high-value pharmaceutical shipments can shift modes based on commercial urgency. The second piece of context is the Caribbean Basin Initiative and the related CBTPA and HOPE/HELP preferential-treatment programmes, which give qualifying apparel and other manufactured goods from Honduras, the Dominican Republic, Haiti, and Central American producers duty treatment that interacts with the broader tariff stack in ways the calculator above attempts to model for the country-of-origin selections supported in the product dropdown. PortMiami's cargo register carries an outsized share of those CBI-eligible flows compared with any other US container gateway.

Looking forward

PortMiami's forward-looking exposure profile looks unlike any other gateway in this set because of its Caribbean and Latin American cargo specialty. The Section 122 emergency tariff cliff applies uniformly — any lapse drops the federal duty side by ten percentage points across every ocean shipment — but the broader forward question at PortMiami is how the web of preferential-treatment programmes affecting Caribbean and Latin American imports evolves: the Caribbean Basin Initiative, USMCA preferences for Mexican origin, and various bilateral trade relationships with South American producers all land more directly on PortMiami-routed shipments than on any other US gateway in the set. The Section 232 list bites only modestly because steel-aluminium is not in the primary cargo register. The Section 301 China overlay matters for the Chinese share of consumer-electronics and apparel imports, but China's share at PortMiami is smaller than at any other US container gateway profiled here because the Caribbean and Latin American flows displace trans-Pacific volume. The largest structural forward question is how the cruise industry's continued scaling at this port interacts with the container operations on shared port infrastructure, and how capital expansion priorities get allocated between the two business lines. A secondary thread is sea-level rise: South Florida is one of the most exposed coastal regions in the United States, and the Seaport Department's long-term capital planning increasingly considers flood-mitigation and elevation infrastructure that does not appear on the operating agenda at most of the other gateways in this set. That climate-resilience dimension interacts with the broader Caribbean supply-chain risk picture too, because the same hurricane systems that affect PortMiami operations also affect the upstream Caribbean and Central American load ports that feed this gateway in the first place.

Tariff rates from Tax Foundation, USITC, and Penn Wharton Budget Model. For commercial-stakes decisions, confirm against a licensed customs broker.