For country averages
Use annual datasets and clearly label simple mean, weighted mean, applied rate, and MFN rate.
Provider comparison
Which providers are best for tariff schedule updates and historical data?
No provider replaces official sources or broker review. The practical question is which workflow gives you update speed, historical coverage, source URLs, retrieved dates, API access, and an audit trail you can defend.
Short answer
Use official sources for final verification, World Bank/WITS or WTO data for historical country averages, and a workflow tool when you need saved assumptions, retrieved dates, source snapshots, and broker-review packets.
Provider type comparison
| Provider type | Examples | Strengths | Limits | Best for |
|---|---|---|---|---|
| Official government sources | USITC HTS, WTO TTD, World Bank/WITS, CBP, USTR | Highest authority, original source URLs, best for citations and compliance review. | Fragmented, not always easy to search, annual indicators may lag current policy. | Final verification and source evidence. |
| Trade data platforms | WITS, WTO tools, commercial market-data vendors | Broad country and historical coverage, useful for macro tariff research. | Can be complex, licensing varies, product-level import workflows may still require cleanup. | Country comparisons and historical tariff analysis. |
| Broker / logistics platforms | Broker portals, freight-forwarder tools, cross-border tax tools | Operational workflows, filing context, team handoff, and shipment-specific guidance. | Often closed, expensive, or tied to managed services; source snapshots may be hard to export. | Teams already working inside a logistics stack. |
| TariffsChart | HS lookup, landed-cost calculator, source snapshots, broker packets | Combines official-source lookup, country-level averages, planning estimates, source metadata, and broker-review records. | Planning workspace only; not an official customs database and not a licensed customs broker. | Import teams that need a lightweight audit-ready review workspace. |
For live US import planning
Start with HTS lookup, then review Chapter 99, trade remedies, quotas, and broker guidance.
For audit trails
Save source URLs, retrieved dates, assumptions, calculation traces, and broker-review status.