Most Favored Nation (MFN) Rate
Most Favored Nation (MFN) rate is the standard tariff rate that a World Trade Organization (WTO) member country charges on imports from all other WTO members. In U.S. trade, MFN rates are the baseline duty rates listed in Column 1 of the Harmonized Tariff Schedule (HTS). Despite the name, MFN is not a preferential rate — it is the default rate that applies unless a special tariff program adds to it or a free trade agreement reduces it.
How MFN Rates Work
The WTO Principle
Under WTO rules, if a country grants a trade concession to one member (such as a lower tariff rate), it must extend the same concession to all WTO members. This is the "most favored nation" principle — no member should be treated worse than the "most favored" trading partner.
In Practice for U.S. Imports
Every product in the HTS has a Column 1 General rate — this is the MFN rate. For example:
- Cotton t-shirts (HTS 6109.10): MFN rate of 16.5%
- Passenger vehicles (HTS 8703.23): MFN rate of 2.5%
- Laptop computers (HTS 8471.30): MFN rate of 0% (free)
- Ceramic tiles (HTS 6907.21): MFN rate of 8.5%
What Stacks on Top
MFN is just the floor. Additional tariff programs stack on top:
| Layer | Example Rate | Authority |
|---|---|---|
| MFN base rate | 2.5% | HTS Column 1 |
| + Section 122 surcharge | 15% | Trade Act of 1974 |
| + Section 232 (if steel/aluminum) | 25% | Trade Expansion Act |
| + Section 301 (if from China) | 25% | Trade Act of 1974 |
| = Total duty rate | 67.5% | All authorities combined |
MFN vs. Other Rate Categories
| Rate Type | Applies To | Typical Level |
|---|---|---|
| MFN (Column 1 General) | WTO members (most countries) | 0-30% depending on product |
| Column 2 (Non-MFN) | Non-WTO members (Cuba, North Korea, Russia) | Often 2-10x higher than MFN |
| Free Trade Agreement rates | FTA partners (USMCA, CAFTA-DR, etc.) | 0% or reduced |
| GSP rates | Developing country beneficiaries | 0% on eligible products |
Why MFN Matters in 2026
Understanding MFN rates is critical because they are the foundation on which all other tariffs are built. When people say "tariffs are at 40%," that includes the MFN base rate plus whatever additional tariff programs apply. To calculate your true cost, you need to know all layers.
The MFN rate also determines the savings from free trade agreements. If a product's MFN rate is 15% but the USMCA rate is 0%, that's a 15 percentage point advantage for sourcing from Mexico or Canada — on top of potentially avoiding Section 122.
Related: Landed Cost | HS Code | Section 301 Tariffs