Importing and exporting goods often expose Swiss SMEs to unforeseen tariff fluctuations, particularly during global demand peaks. Because Switzerland is a landlocked country, businesses rely heavily on seamless connections to major European maritime hubs such as Rotterdam, Antwerp, and Genoa. This reliance adds an extra layer of complexity to supply chain management. Among the most complex logistics challenges are peak season surcharges in sea freight, additional costs applied by shipping companies when transport volumes explode. Understanding how these fees work is an essential step to preserve your company's profit margin, maintain competitive pricing for your customers, and guarantee the fluidity of your supply chain.
Founded in 1988, Agence Fret Cargo is your preferred partner to navigate the complexity of international trade. With over thirty-eight years of experience and operating directly from Geneva Airport, we act as the true architect of your transport. Our mission is to organise each shipment optimally, combining transport modes to offer you the best value for money while ensuring the regulatory compliance of your goods.
1. What are peak season surcharges in sea freight?
Shipping companies continually adjust their rates according to global supply and demand. The PSS (Peak Season Surcharge) is a temporary fee imposed when the demand for space on ships vastly exceeds the available capacity on certain trade routes. When vessels are fully booked weeks in advance, carriers implement these surcharges to manage the overflow and prioritise urgent shipments. Furthermore, global disruptions, such as unexpected port strikes, severe weather events, or container shortages, can severely exacerbate these seasonal peaks. The resulting bottleneck means that securing space becomes a premium service, and the PSS acts as a mechanism to regulate this intense demand.

In parallel, the market also experiences the General Rate Increase (GRI), which corresponds to a general adjustment of base freight rates. These mechanisms allow shipowners to compensate for port congestion and equipment imbalance, but they directly impact the final cost for importers.
2. When do these additional fees apply?
Activity peaks are not random; they follow very specific economic and calendar cycles. Shipping companies generally announce these surcharges a few weeks before their implementation, although the notice period can be particularly short during periods of high tension on the supply chain. It is vital for Swiss importers and exporters to map out these recurring events to avoid unpleasant surprises on their freight invoices.
- The period preceding the end-of-year holidays, marked by massive restocking by retailers preparing for Black Friday, Cyber Monday, and the festive season.
- The weeks preceding the Chinese New Year, during which Asian factories ship a maximum of orders before their annual closure. Additionally, the Chinese Golden Week in October often causes a mini-peak as businesses rush to move goods before the week-long national holiday.
- The back-to-school period and the summer season, generating significant flows of everyday consumer goods, electronics, and clothing.
3. Comparison: PSS versus GRI
Although these two terms are often confused by logistics players, they designate distinct commercial realities. It is crucial for your financial planning to clearly differentiate these two types of tariff adjustments. While a GRI reflects a broader shift in the baseline cost of maritime transport—often driven by fuel costs, regulatory changes, or long-term operational expenses—a PSS is strictly a reaction to immediate, overwhelming demand. Freight forwarders constantly monitor these fluctuations, negotiating with carriers to mitigate the impact on the final bill of lading.

| Characteristic | Peak Season Surcharge (PSS) | General Rate Increase (GRI) |
|---|---|---|
| Nature of the increase | Temporary surcharge linked to exceptional demand | General increase in the base freight rate |
| Duration of application | Limited to the peak season period | Often permanent until the next adjustment |
| Predictability | Linked to known seasonal peaks | Dependent on global market conditions |
4. Strategies to anticipate these tariff fluctuations
The best defence against sudden price increases lies in anticipation. By planning your shipments well in advance of critical periods, you increase your chances of securing space on board ships before the surcharges come into effect. Accurate forecasting and maintaining open lines of communication with your suppliers and logistics partners are fundamental to navigating these turbulent periods successfully.
To obtain an accurate estimate, certain information is required: type of goods, places of departure and destination, weight, volume and desired arrival date. At Agence Fret Cargo, the quote is free; its validity date is clearly indicated on the estimate and is generally one month.
For less voluminous shipments, consolidation or groupage allows you to share the space of a container with other customers. You thus only pay for the space actually occupied by your goods, which is an excellent strategy to bypass the exorbitant costs of booking a full container during peak season. Furthermore, exploring alternative routing or slightly longer transit times can sometimes yield significant savings. To further your thinking on the choice of shipping method, do not hesitate to consult our guide [Sea Freight vs Air Freight: Which is the most advantageous?](/sea-vs-air-freight-for-business).
5. The importance of transport insurance during peak periods
Peak season periods inevitably cause congestion in port terminals, thereby increasing the risks of delays, multiple transshipments and potential damage to the cargo. When ports are overwhelmed, containers may sit on the docks for extended periods, exposing them to extreme weather conditions, increased risk of theft, or rough handling during rushed loading procedures.

The carrier's civil liability insurance often covers only a tiny fraction of the actual value of the goods, usually calculated by weight rather than the intrinsic value of your cargo. Agence Fret Cargo therefore strongly recommends taking out complementary all-risks transport insurance through us. Our specialists help you assess the specific risks associated with your trade routes and design a tailor-made solution at competitive rates, providing comprehensive global coverage for any mode of transport.
6. Support from a transport architect
Facing regulatory and tariff complexities requires specialised expertise. As an international freight forwarder, we act as a transport architect: we organise each shipment so that your goods arrive safely and on the required date, while optimising the combination of transport modes to offer you the best value. We leverage our established relationships with major shipping lines to secure space and negotiate favourable terms, even when the market is at its most volatile.
Beyond simple logistics planning, Agence Fret Cargo takes care of all administrative tasks. From shipping documents and customs formalities to the management of port fees, we ensure strict compliance with local and international regulations, in line with industry standards such as those promoted by Spedlogswiss. Our dedicated team provides proactive tracking and regular updates, ensuring that you are never left in the dark regarding the status of your shipments. Our global network of experts ensures that your supply chain remains resilient and efficient, even in the heart of the busiest seasons.
Contact Agence Fret Cargo
📍 Voie-des-Traz 20, 1215 Le Grand-Saconnex (Geneva Airport) 📞 +41 22 798 68 00 📧 hello@fretcargo.com
Any rates and transit times mentioned are indicative market estimates, subject to final confirmation based on your shipment details, the commodity, and current market conditions.
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