Landed Cost Volatility from Vietnam: How Currency Swings and Freight Rate Spikes Are Compressing US Importer Margins

When a US company negotiates a supply agreement with a Vietnamese manufacturer, the conversation typically centers on unit price, minimum order quantities, and lead times. These are the visible variables—the ones that appear in contracts and get reviewed in quarterly business reviews. What often receives far less structured attention is the set of invisible variables that determine what those units actually cost by the time they arrive at a US distribution center.

Two of the most consequential invisible variables are the USD/VND exchange rate and air freight rate volatility on the Vietnam-to-US corridor. Each is capable of meaningfully shifting landed costs on its own. Together, and particularly when they move in the same adverse direction simultaneously, they can transform a profitable sourcing relationship into a margin-eroding one with very little warning.

Understanding the Exchange Rate Exposure

Most Vietnamese manufacturing contracts are denominated in US dollars, which might suggest that exchange rate risk is limited for US buyers. In practice, the exposure is more nuanced.

Vietnamese manufacturers price their goods in USD, but their input costs—labor, domestic raw materials, utilities, and local logistics—are incurred in Vietnamese dong (VND). When the VND weakens against the dollar, Vietnamese manufacturers' real costs decline in dollar terms, which can create downward pressure on export prices. When the VND strengthens—or when the dollar weakens significantly—manufacturers face margin compression on their end, which they typically attempt to recover through price renegotiation at the next contract cycle.

For US importers, this creates an asymmetric dynamic. Dollar weakness does not automatically translate into lower purchase prices because Vietnamese suppliers often have multi-year pricing agreements or minimum margin floors. But dollar strength does not necessarily deliver the full benefit either, because suppliers in a competitive market will adjust prices to maintain volume. The net effect is that exchange rate movements create uncertainty and friction in the pricing relationship without delivering proportional benefits to either side.

There is also a secondary exchange rate exposure that is frequently overlooked: the cost of ancillary services denominated in local currency. Customs brokerage fees, inland trucking within Vietnam, warehouse handling charges, and documentation fees are often quoted in VND. A US importer who negotiates a fixed USD unit price but pays local service fees in dong is exposed to exchange rate movement on those line items throughout the shipment lifecycle.

The Air Freight Rate Layer

Air freight rates on the Vietnam-to-US corridor are among the most volatile in global cargo markets. The route combines several structural sources of instability: limited direct flight capacity, dependence on belly cargo space from passenger airlines whose schedules fluctuate with travel demand, high seasonality driven by US retail calendars, and periodic disruptions from weather, regulatory changes, and geopolitical events affecting regional routing.

Between 2020 and 2023, air freight rates from Vietnam to the US West Coast moved from approximately $3 to $4 per kilogram under pre-pandemic norms to peaks exceeding $14 per kilogram during the height of COVID-related disruptions—a fourfold increase. While rates have moderated since those extremes, they have not returned to pre-2020 baselines and remain subject to significant seasonal variation, with Q4 rates typically running 30 to 50 percent above Q2 rates on the same corridor.

For a US importer shipping 500 kilograms per week from Ho Chi Minh City to Los Angeles, the difference between a $5 per kilogram rate and an $8 per kilogram rate represents $156,000 in additional annual freight cost. That figure is not hypothetical—it reflects the kind of rate movement that has occurred within single calendar years on this corridor.

When Both Variables Move Against You

The most damaging scenario for US importers is not exchange rate volatility in isolation, nor freight rate volatility in isolation—it is the convergence of both adverse movements within the same fiscal period.

Consider a practical example. A US apparel company finalizes a Vietnam sourcing contract in Q1, with unit costs priced in USD and ocean freight as the assumed mode. By Q3, a demand spike requires shifting a portion of the order to air freight. Simultaneously, a broader US dollar weakening cycle has reduced the purchasing power of the dollar relative to regional currencies, putting upward pressure on the next contract renewal. The company faces higher freight costs on the current shipment and higher unit costs on the next order—a double compression that was not reflected in any of the original financial projections.

This compounding effect is not rare. It is a recurring feature of the Vietnam sourcing landscape that companies with static pricing models are structurally unprepared to manage.

Practical Approaches to Cost Stabilization

No strategy eliminates exposure to exchange rate and freight rate volatility entirely, but several approaches can meaningfully reduce the unpredictability of total landed costs.

Multi-Currency Pricing Agreements For high-volume sourcing relationships, US importers can negotiate pricing formulas that include explicit exchange rate adjustment clauses—for example, a mechanism that triggers a price review if the USD/VND rate moves more than five percent from the contract baseline. This creates shared exposure rather than placing the full burden of currency movement on one party.

Freight Rate Hedging Through Forward Contracts Some logistics providers operating on the Vietnam-to-US corridor offer forward rate agreements that lock in a per-kilogram air freight price for a defined volume over a specified period. These instruments are not universally available, and they require volume commitments, but they convert a variable cost into a predictable one for planning purposes. US importers with reasonably stable quarterly volumes should explore whether their current logistics partners can offer this type of arrangement.

Total Landed Cost Modeling Rather than tracking unit cost, freight cost, and duties as separate line items, US importers should maintain a unified total landed cost model that is updated in real time as exchange rates and freight rates move. This sounds straightforward, but many companies still operate with static landed cost assumptions that are refreshed only at contract renewal. A dynamic model surfaces margin compression early enough to allow a commercial response.

Supplier Diversification Across Vietnamese Regions Vietnam's industrial geography creates some natural freight cost variation. Suppliers in northern Vietnam—particularly in Hanoi, Hai Phong, and the surrounding provinces—have different freight routing options than suppliers in the south. Maintaining supplier relationships in both regions provides modest but real flexibility in routing and rate negotiation, particularly during periods of localized capacity pressure.

Demand-Responsive Mode Planning As discussed in the context of seasonal forecasting, reducing dependence on reactive air freight is one of the most direct ways to limit exposure to freight rate volatility. Companies that can reliably predict which portion of their Vietnam-origin volume will require air transport—and when—are better positioned to pre-negotiate rates or pre-book capacity before seasonal price increases take effect.

The Strategic Imperative

The margin advantage of Vietnamese-origin goods is real, but it is not unconditional. It depends on disciplined management of the cost variables that sit between the factory floor and the US distribution center. For companies that treat landed cost as a fixed input rather than a dynamic output, the current environment in Vietnam-to-US trade is genuinely challenging.

For those willing to build the analytical and contractual infrastructure to manage currency and freight volatility proactively, the sourcing advantage remains substantial. The difference lies not in the sourcing decision itself, but in the sophistication with which total cost is understood and managed over time.

FPT MultiAir works with US importers to develop the kind of integrated cost visibility and logistics planning frameworks that make Vietnam sourcing durable—not just attractive on paper.