Independent Service:We summarize selected official publications and link back to the governing sources.Learn more
Use Cases/Customs Brokers

Customs Brokers & Trade Consultants

A faster starting point for measure and deadline research

TariffOS helps locate selected Section 301 and Section 232 measures, deadlines, and official publications. Its calculators use user-supplied assumptions and do not replace the HTSUS, rulings, ACE data, or professional classification work.

The challenges you face

Keeping up with the pace of Section 301/232 modifications and exclusion deadlines
Manual duty calculations across multiple HTS codes and trade programs
Clients ask about FTA eligibility and you need answers fast
Regulatory changes published in the Federal Register need to be caught same-day

Relevant public tools

These links open working public pages; they do not require an account.

Start with a public tool

Use the output as a research lead and verify the linked official source before making a customs decision.

No signup required for the linked public tool.