The USITC Harmonized Tariff Schedule database shows the base MFN duty rate for each HTS code, but it does not calculate additional tariff layers. TariffCalc stacks all 5 duty layers — MFN, IEEPA, Section 301, Section 232, and Section 122 — to give you the true total duty rate. If you only look at the USITC rate, you could be underestimating your landed cost by 10% to 50%.
| Feature | TariffCalc | USITC HTS Database |
|---|---|---|
| MFN / General duty rate | Yes | Yes |
| IEEPA 10% global tariff | Stacked automatically | Not included |
| Section 301 (China) | Stacked automatically | Not included |
| Section 232 (Steel/Aluminum) | Stacked automatically | Not included |
| Section 122 (Auto) | Stacked automatically | Not included |
| Total effective duty rate | Calculated instantly | Manual research required |
| Country-specific rates | Per-country breakdown | No country filtering |
| Landed cost estimate | Yes, with duty + value | No |
| Batch HTS lookups | Up to 100 codes at once | One at a time |
| Price | Free tier available | Free |
No. The USITC Harmonized Tariff Schedule database shows only the base MFN (Most Favored Nation) duty rate for each HTS code. It does not include the IEEPA 10% global tariff, Section 301 tariffs on China, Section 232 tariffs on steel and aluminum, or Section 122 auto tariffs. To get the actual total duty rate, you need to research and stack each layer manually or use a tool like TariffCalc.
The USITC database is the official source for MFN duty rates and is accurate for that purpose. However, MFN is only one of up to five tariff layers that may apply to a given import. Since 2018, additional layers (Section 301, 232, IEEPA, 122) have made the MFN rate alone insufficient for cost planning. TariffCalc uses the same base MFN data and adds all applicable layers.
You can use the USITC database as a starting point, but you will need to manually research and add Section 301, Section 232, Section 122, and IEEPA tariffs for your specific HTS code and country of origin. TariffCalc does this automatically, saving hours of research per lookup.
Stack all 5 tariff layers instantly. Free to start, no credit card required.