A tariff is a duty imposed by a national government, customs territory, or supranational union on imports of goods that is paid by the importer[3]. Tariffs serve as a form of taxation on foreign products entering a country and can be implemented for various economic and political purposes.
## Types and Functions of Tariffs
Tariffs can be classified in different ways and serve multiple functions:
**Optimal Tariff**: This is a tariff set to maximize the welfare of the country imposing it, derived by the intersection between the trade indifference curve of that country and the offer curve of another country[3]. While this may benefit the imposing country, it typically worsens the welfare of trading partners, making it a “beggar thy neighbor” policy[3].
**Reciprocal Tariff**: These are calculated as the tariff rates necessary to balance bilateral trade deficits between the United States and its trading partners[4]. This approach aims to equalize trade conditions between nations.
For economic efficiency, free trade is often considered the best policy, though levying a tariff is sometimes viewed as a second-best option[3]. However, when countries impose retaliatory tariffs on each other, both typically experience welfare losses[3].
## Recent Tariff Developments
### United States
In April 2025, President Donald Trump declared a national emergency regarding foreign trade and economic practices and implemented responsive tariffs aimed at strengthening the United States’ international economic position and protecting American workers[5]. This includes:
– A substantial increase in tariffs and a 10% base tariff on all imported products[3]
– An increase in the US trade-weighted average tariff from 2% to an estimated 24%, the highest level in over a century, including under the Smoot-Hawley Tariff Act of 1930[3]
The Trump administration has characterized this as the “America First Trade Policy” and “Reciprocal Trade and Tariffs”[4]. The policy addresses what the administration views as imbalances in the global tariff system, noting that the United States has among the lowest simple average Most-Favored Nation (MFN) tariff rates in the world at 3.3%, while many key trading partners maintain significantly higher rates[2]:
– Brazil: 11.2%
– China: 7.5%
– European Union: 5%
– India: 17%
– Vietnam: 9.4%
### Switzerland
In contrast to the U.S. approach, Switzerland abolished tariffs on industrial products imported into the country in 2024. Using 2016 trade figures, the Swiss government estimated this move could generate economic benefits of 860 million CHF per year[3].
## Tariff Disparities
The disparity in tariff rates becomes even more pronounced when examining specific products[2]:
– Passenger vehicles (with internal combustion engines): US imposes 2.5% while the EU charges 10%, India 70%, and China 15%
– Network switches and routers: US imposes 0% while India levies 10%
– Ethanol: US charges 2.5% compared to Brazil’s 18% and Indonesia’s 30%
– Rice in the husk: US tariff is 2.7% (ad valorem equivalent) versus India’s 80%, Malaysia’s 40%, and Turkey’s average of 31%
– Apples: Enter the US duty-free but face tariffs of 60.3% in Turkey and 50% in India
These disparities have been cited by the Trump administration as justification for its reciprocal tariff approach, which it believes will address trade imbalances and strengthen American economic security[5].