Executive Summary
Ocean shipping is by most measures the least expensive way to move goods across long distances. A container of consumer goods can cross the Pacific or travel from East Asia to Northern Europe for a cost that adds only pennies or a few dollars to the retail price of each item inside it. Yet places that depend almost entirely on shipping for their supply, such as Iceland, Hawaii, the Faroe Islands, Greenland, the Pacific island states, and road-isolated communities like those on the north coast of Labrador, consistently face some of the highest costs of living in the developed world.
This paper argues that the contradiction is only apparent. The low cost of ocean shipping is not a property of water. It is a property of networks operating at enormous scale, with dense and roughly balanced traffic, competitive carriers, and highly productive ports. Isolated places sit at the opposite end of every one of those conditions. They are served by small ships on thin routes, they import far more than they export, they are often served by only one or two carriers, their ports handle low volumes at high fixed cost, and their goods must frequently be handled several times before arrival. Regulatory regimes, seasonal access, inventory burdens, and small retail markets then add further layers. The “island premium” is the sum of these structural penalties, and it persists even when the open-ocean leg of the journey is cheap.
1. The Apparent Paradox
The modern container system has driven the cost of moving goods between major ports to historically low levels. The largest container ships now carry upward of 20,000 twenty-foot equivalent units (TEU), and on the mainline trades connecting East Asia, Europe, and North America, the cost of the ocean voyage is spread across so many boxes that freight becomes a small fraction of the value of most manufactured goods. Economists studying globalization have noted that the decline in shipping costs, along with containerization’s reduction in handling time, did as much as tariff reductions to make long-distance supply chains viable.
The same system, however, delivers goods to Reykjavík, Honolulu, or Nain at markedly higher cost per unit. It is frequently observed that shipping a container roughly 2,100 nautical miles from the U.S. West Coast to Hawaii can cost as much as, or more than, shipping a container roughly five times that distance from Shanghai to Rotterdam. Distance, in other words, explains very little. The explanation lies in the structure of the routes, the markets, and the institutions involved.
2. Why Mainline Shipping Is Cheap
Understanding the island premium requires first identifying what makes mainline shipping inexpensive. Four conditions do most of the work.
The first is vessel scale. Operating costs for a ship (crew, fuel, capital, insurance) rise much more slowly than capacity. A ship carrying ten times as many containers does not need ten times the crew or burn ten times the fuel. Cost per box therefore falls steeply as ships grow larger, provided they can be filled.
The second is traffic density. Mainline routes connect massive manufacturing regions with massive consumer markets, so large ships can be filled reliably and run on frequent fixed schedules. High frequency reduces the need for shippers to hold large inventories, which lowers costs further down the chain.
The third is relative balance of flows. Even on unbalanced trades such as Asia to North America, the return leg carries considerable cargo, and empty containers can be repositioned in bulk at low marginal cost because the ships are making the voyage anyway.
The fourth is port productivity and competition. Hub ports such as Singapore, Shanghai, Rotterdam, and Los Angeles–Long Beach handle tens of millions of TEU annually with heavily capitalized, often automated terminals. Their fixed costs are spread across enormous volumes. Multiple global carriers and alliances compete on these lanes, which disciplines pricing outside periods of acute disruption.
Each of these conditions is a function of scale and density, and each one is weakened or absent at the periphery.
3. The Structural Sources of the Island Premium
3.1 Thin Markets and Small Ships
An island of a few hundred thousand people, or a coastal community of a few hundred, cannot generate the volumes needed to fill large vessels. Carriers serving such places must use smaller ships, and smaller ships carry a far higher cost per container. The economies that make the mainline cheap simply do not reach these routes. Short-sea and feeder shipping, measured per ton-mile, is many times more expensive than deep-sea mainline service.
3.2 Transshipment and Repeated Handling
Isolated places are usually spokes in a hub-and-spoke network. A container bound for Iceland from Asia does not travel directly; it rides a mainline vessel to a European hub such as Rotterdam, is lifted off, stored, lifted onto a feeder vessel, and carried onward. Goods bound for a north Labrador community may pass through several stages: mainline or rail delivery to a staging port, transfer to a coastal freighter, and sometimes further transfer to smaller craft or local trucking.
Every lift, every terminal stay, and every transfer carries a charge. In practice, terminal handling and port costs at the two ends of a journey often exceed the cost of the ocean voyage itself on mainline routes. An island shipment incurs these end costs more than once. The deep-sea leg may be cheap, but the island pays for the extra links in the chain.
3.3 Directional Imbalance and the Empty Backhaul
Most isolated economies import far more cargo, by volume, than they export. Hawaii imports the great majority of its food and manufactured goods while exporting comparatively little by container. Ships and boxes that arrive full therefore leave substantially empty. Carriers must recover the cost of the round trip, so the inbound leg effectively carries the cost of the empty return.
Iceland is a partial exception that proves the rule. Its seafood and aluminum exports provide meaningful outbound cargo, which improves vessel and container utilization compared with places that export little. Even so, the export profile does not match the import profile in either composition or timing. Refrigerated fish exports, for example, do not fill the dry containers that brought in consumer goods.
3.4 Concentrated Market Structure
Thin routes support few carriers. Many island markets are served by a duopoly or near-monopoly, and the high fixed costs of entering a small market discourage new competitors, since an entrant would need to capture a substantial share of a small pie to justify the vessels and terminal commitments.
Iceland illustrates the risk this creates. Its container shipping has long been dominated by two firms, Eimskip and Samskip. Icelandic competition authorities investigated the pair for collusion over a period of years; Eimskip reached a settlement involving a significant fine in 2021, and authorities later imposed a larger fine on Samskip, which the company contested. Whatever the final legal outcome, the case demonstrates how small, concentrated markets create both the opportunity and the temptation for coordinated pricing, and how difficult such conduct can be to detect.
Hawaii’s mainland trade has similarly been served by a very small number of carriers, with Matson the long-dominant operator and Pasha the principal competitor. Concentration does not by itself prove excessive pricing, since thin routes may genuinely support only a few operators, but it reduces the competitive pressure that keeps mainline rates low.
3.5 Regulatory Constraints: Cabotage Law
Domestic shipping between two ports in the same country is often restricted by cabotage laws. In the United States, Section 27 of the Merchant Marine Act of 1920, known as the Jones Act, requires that cargo moving between U.S. ports travel on vessels that are U.S.-built, U.S.-owned, U.S.-flagged, and predominantly U.S.-crewed. Hawaii, Alaska, and Puerto Rico depend heavily on such domestic trades.
Critics of the Jones Act argue that it raises costs substantially, because U.S.-built ships cost several times more than comparable foreign-built ships and U.S. crew costs are higher, and because the restriction limits the pool of eligible carriers. Defenders argue that the law sustains a domestic shipbuilding base and a mariner workforce with national-security value, guarantees reliable regular service to noncontiguous states, and that critics overstate its effect on retail prices given the many other contributors to island costs. Empirical estimates of the law’s cost impact vary widely, and government reviews have generally found the magnitude difficult to isolate. The honest summary is that the Jones Act is one contributor among several, with its precise weight still disputed.
Canada has a comparable regime under the Coasting Trade Act, which restricts domestic marine trade to Canadian-registered vessels with limited exceptions. This applies to supply movements to Labrador and to the Arctic.
Iceland, as a sovereign state, faces no such domestic constraint on its main import routes, since its cargo arrives from foreign ports. That Iceland still experiences high costs is an important reminder that cabotage law, however significant for Hawaii, cannot be the whole explanation.
3.6 Port Economics at Low Volume
A container terminal requires cranes, yard space, labor, security, and maintenance whether it handles fifty thousand boxes a year or five million. At low volumes these fixed costs are spread thinly, raising per-container charges. Small ports also tend to have less advanced equipment, slower turnaround, and fewer berths, which lengthens vessel stays and increases costs. Where no proper port exists, as in many northern Labrador and Arctic communities, cargo must be lightered ashore by barge or landed across beaches, which is slower, riskier, and more expensive.
3.7 Seasonality and Access Windows
For ice-bound places, the shipping season itself is a constraint. Communities on Labrador’s north coast, such as Nain, Hopedale, Makkovik, Postville, and Rigolet, have no road connection to the rest of the province. Although the Trans-Labrador Highway now links the interior and southern coast to Quebec, these northern communities remain functionally islands. They receive marine freight only during the ice-free season, typically from early summer into late autumn. Outside that window, goods arrive by air at a far higher cost per kilogram.
This produces two burdens. Communities must order and pay for large quantities of nonperishable goods months in advance, tying up capital and requiring storage. Perishables, which cannot be stockpiled, must largely move by air for much of the year. The cost of fresh food in such communities can be several times that in southern cities, which is why Canada maintains the Nutrition North Canada subsidy for isolated northern communities.
3.8 Inventory, Storage, and Risk
Infrequent sailings and long lead times force wholesalers and retailers in isolated places to hold larger safety stocks than mainland counterparts, who can rely on daily truck replenishment. Inventory ties up capital, requires warehouse space (often on expensive land in places like Hawaii or Reykjavík), and risks spoilage or obsolescence. Weather disruptions to sailings carry outsized consequences when there is no road alternative, so businesses buffer against them, and the cost of that buffer is built into prices. Insurance premiums and the cost of occasional emergency air freight further add to the delivered cost.
3.9 Small Retail and Wholesale Markets
The premium does not end at the dock. A small population supports fewer wholesalers, distributors, and retailers, which reduces competition at every stage of distribution. Retailers cannot achieve the purchasing scale of mainland chains, and in very small communities a single store may serve the whole population. Each layer of reduced competition allows margins to widen.
3.10 Costs That Are Not Shipping
Analytical honesty requires distinguishing the transport premium from other causes of high prices in isolated places. Iceland maintains high agricultural tariffs and quotas to protect domestic farmers, and these, rather than shipping, account for much of the cost of certain foods there. Its currency has a history of volatility that affects import prices. Hawaii’s high land and housing costs, and its historically high electricity prices from reliance on imported fuel oil, raise the cost of every business operation, including warehousing and retail. Iceland, by contrast, enjoys inexpensive geothermal and hydroelectric power, which shows that isolated places are not uniformly disadvantaged in every input.
These factors interact with shipping costs but are distinct from them. Policy aimed solely at freight will not resolve the parts of the premium rooted in land, energy, labor, taxation, or trade protection.
4. Case Comparisons
Iceland
Iceland combines a small population of roughly 390,000 with a mid-Atlantic location between European and North American markets. It is served primarily by two carriers on feeder-type routes connecting to European hubs, along with some transatlantic service. Its export base of fish and aluminum reduces the backhaul problem compared with many islands, and as a sovereign state it controls its own trade, competition, and port policy. Its high prices reflect the transport premium compounded by concentrated shipping, agricultural protection, currency effects, and high wages. Iceland demonstrates that sovereignty provides policy tools but does not remove the underlying geography of scale.
Hawaii
Hawaii has a much larger population, roughly 1.4 million, along with a large tourism sector that drives demand for imported goods. Its mainland trade falls under the Jones Act, and its carrier market is highly concentrated. Its outbound flows are weak, producing a severe backhaul imbalance. Interisland distribution adds another layer of maritime handling for goods bound for islands other than Oahu. Combined with expensive land, historically expensive energy, and high labor costs, the result is among the highest costs of living in the United States. As a subnational unit, Hawaii cannot alter federal cabotage law on its own and must rely on its congressional delegation, which has historically been divided on the question.
North Coast Labrador
The communities of northern Labrador represent the island condition in its most acute form. They have tiny populations, no road access, no deep-water container terminals, a limited and seasonal shipping window, and dependence on air freight for much of the year. Supply is organized around a provincially supported coastal freight service. Here the transport premium is not marginal but dominant, and public subsidy is essential to basic food security. Labrador also shows how a road can transform a place’s economics. Communities now linked by the Trans-Labrador Highway have gained a year-round supply route that their northern neighbors lack.
Other Island-Like Places
The pattern recurs widely. Juneau, Alaska’s capital, has no road connection to the rest of North America and depends on barge and ferry service. Iquitos, Peru, is often described as the largest city in the world unreachable by road, supplied by river and air. Greenland and the Faroe Islands face conditions similar to Iceland’s, at smaller scale. Small island developing states across the Pacific and Caribbean face some of the highest freight costs relative to trade value anywhere in the world, according to repeated assessments by international trade bodies.
5. Policy Responses
Governments have developed several approaches to reduce the island premium, each addressing a different component.
Freight equalization schemes subsidize the cost gap between sea transport and an equivalent road journey. Australia’s Tasmanian Freight Equalisation Scheme compensates shippers for the extra cost of crossing Bass Strait. Scotland’s Road Equivalent Tariff sets ferry fares to the Western Isles at roughly what an equivalent road distance would cost. France’s principle of territorial continuity supports transport to Corsica and its overseas territories, and Spain provides transport compensation to the Canary and Balearic Islands. These approaches treat the sea crossing as a missing road and pay to close the gap.
Targeted consumer subsidies, such as Nutrition North Canada, attempt to lower the price of essentials directly in the most isolated communities. Their effectiveness depends heavily on whether savings pass through to consumers rather than being absorbed by retailers, a question that has drawn scrutiny in Canada.
Competition enforcement addresses the risk of collusion and excessive pricing in concentrated carrier markets, as Iceland’s investigations illustrate. Small markets require especially attentive regulators because a small number of actors can more easily coordinate.
Cabotage reform remains debated, particularly regarding the Jones Act. Proposals range from full repeal to narrower exemptions for noncontiguous states or relaxation of the domestic-build requirement. The trade-offs involve national security, employment, and service reliability on one side and consumer costs on the other.
Port and infrastructure investment can raise productivity and reduce per-unit handling costs, though investment must be sized to realistic volumes to avoid creating facilities whose fixed costs worsen the problem. Where feasible, road construction, as in Labrador, can convert an island economy into a connected one.
Demand aggregation and local production offer partial relief. Cooperative purchasing can help small retailers gain scale, and local food production or processing can reduce dependence on imports for goods that spoil or ship poorly. These approaches have natural limits set by climate, land, and population, but they reduce exposure to the most expensive categories of freight.
6. Conclusion
The cheapness of ocean shipping and the expensiveness of island life are two expressions of the same economic logic. Shipping is cheap where it is big, dense, balanced, competitive, and efficiently handled. Isolated places are small, sparse, unbalanced, concentrated, and served by low-volume infrastructure, so they receive few of the benefits that make global trade inexpensive while bearing many of its fixed costs. The ocean voyage itself is rarely the main expense. The premium accumulates in the extra handling, the empty return trip, the small ship, the limited competition, the regulatory constraint, the seasonal window, the inventory buffer, and the thin retail market at the end of the chain.
For policymakers, the central lesson is that no single intervention addresses the whole premium. Places like Iceland can use the tools of sovereignty but cannot legislate away scale. Places like Hawaii are bound by decisions made in distant capitals. Places like northern Labrador depend on public support simply to meet basic needs. Recognizing the premium as a compound of distinct structural causes, rather than a simple consequence of distance, is the necessary first step toward responses that match the actual shape of the problem.
