Tariff Stacking
Tariff stacking occurs when multiple tariff programs apply simultaneously to the same import. For Chinese goods in 2026, the combined rate from general duties, Section 301, Section 122, and Section 232 can exceed 65%.
Tariff stacking occurs when multiple tariff programs apply simultaneously to the same import, compounding the total duty rate. In the 2026 U.S. tariff environment, stacking has created some of the highest effective duty rates in modern American trade history.
How Tariff Stacking Works
Tariffs from different legal authorities are additive, not nested. Each tariff layer is calculated on the declared customs value of the goods independently, and the rates are summed. This means a product subject to three tariff programs at 15%, 25%, and 25% faces a 65% combined rate — not a compounded rate.
The 2026 Tariff Stack
For Chinese goods, the full stack in March 2026 can include:
| Tariff Layer | Authority | Rate Range |
|---|---|---|
| General duty (MFN) | Harmonized Tariff Schedule | 0-30% |
| Section 301 | Trade Act of 1974 | 7.5-25% |
| Section 122 | Trade Act of 1974 | 15% (flat) |
| Section 232 | Trade Expansion Act of 1962 | 25% (steel/aluminum only) |
Example: Chinese Steel Imports
- General duty: ~0% (many steel products enter duty-free under MFN)
- Section 301: 25%
- Section 122: 15%
- Section 232: 25%
- Total effective rate: 65%
Example: Chinese Electronics
- General duty: ~2-5%
- Section 301: 25%
- Section 122: 15%
- Total effective rate: 42-45%
Example: Vietnamese Furniture
- General duty: ~0-5%
- Section 122: 15%
- Total effective rate: 15-20% (no Section 301 or 232)
Why Stacking Matters for Importers
Tariff stacking creates several challenges:
- Margin erosion — Combined rates above 40% can make previously profitable import channels unviable
- Complexity in landed cost calculations — Each layer must be calculated separately and summed, requiring awareness of which programs apply to each product
- Cash flow pressure — Higher duties mean more capital tied up in customs payments, especially for small businesses without duty deferral programs
- Classification sensitivity — A product's HS code determines which tariff layers apply; misclassification can add or remove entire tariff layers
Strategies for Managing Tariff Stacking
- Verify all applicable tariff layers for each product using tools like our HS Code Lookup
- Explore sourcing alternatives from countries with fewer tariff layers (e.g., shifting from China to Vietnam removes Section 301)
- Check for exclusions — Some products are excluded from specific layers, reducing the stack
- Consider Foreign Trade Zones (FTZs) — FTZs can allow you to defer or reduce tariff payments through strategic admission and manipulation of goods
- Use the Duty Calculator to model the full tariff stack for your specific products and origin countries