With the IEEPA global tariff, ongoing Section 301 actions, and new Section 122 auto tariffs, calculating U.S. import duties in 2026 requires stacking up to 5 separate tariff layers. We compare the top options — from free government databases to enterprise platforms — so you can pick the right tool for your needs and budget.
| Feature | TariffCalc | Other Options |
|---|---|---|
| 5-layer tariff stacking | Yes — automated | Varies (most show MFN only) |
| Free access | Yes | USITC: Free / Flexport: No / Zonos: No / Broker: No |
| Instant results | Under 5 seconds | USITC: Fast / Flexport: Slow / Zonos: Fast / Broker: Slow |
| Country-specific rates | All countries | USITC: No / Flexport: Yes / Zonos: Yes / Broker: Yes |
| Batch processing | 100 codes per batch | USITC: No / Flexport: Yes / Zonos: API / Broker: Per-entry |
| IEEPA included | Yes | USITC: No / Flexport: Varies / Zonos: Varies / Broker: Yes |
| Section 301 included | Yes | USITC: No / Flexport: Varies / Zonos: Varies / Broker: Yes |
| Ecommerce integration | No | USITC: No / Flexport: No / Zonos: Yes / Broker: No |
| Monthly cost | $0–99 | USITC: $0 / Flexport: Enterprise / Zonos: $500+ / Broker: $300+/hr |
| Best for | U.S. import duty calculation | Depends on needs (see details) |
TariffCalc offers the best free tariff calculator for U.S. imports. It stacks all 5 duty layers (MFN, IEEPA, Section 301, Section 232, Section 122) automatically. The USITC database is also free but only shows the base MFN rate, missing up to 4 additional layers that can add 10–50% to the total duty.
Yes. Since February 2025, the IEEPA 10% global tariff applies to nearly all U.S. imports on top of existing duty rates. Combined with Section 301 (China), Section 232 (steel/aluminum), and Section 122 (autos), many products face 3 or more stacked tariff layers. A calculator that shows only the MFN rate will underestimate your costs by 10% to 50%.
TariffCalc is the only free tool that automatically stacks the IEEPA 10% global tariff, Section 301 China tariffs, Section 232 steel/aluminum tariffs, and Section 122 auto tariffs on top of the base MFN rate. Customs brokers can do this manually, but charge $300+/hour for the service.
TariffCalc: Free for basic lookups, $29–99/month for batch processing and alerts. USITC: Free (MFN only). Flexport: Enterprise pricing (requires account). Zonos: $500+/month. Customs broker: $150–250/entry or $300+/hour for consulting.
Stack all 5 tariff layers instantly. Free to start, no credit card required.