Tariff Intelligence for Trade Professionals
When a tariff changes, you find out in minutes, not when your accountant finds the discrepancy three weeks later. Structured alerts with the exact rate, the effective date, and the Federal Register citation. Ready to pipe into your systems or read over coffee.
Day 0
USTR publishes a Federal Register notice raising Section 301 duties on HTS 8541.40 (solar cells) from 25% to 50%. The document is 47 pages. The rate change is on page 31.
Day 1-3
Trade publications pick it up. Half of them get the effective date wrong. Your team is busy clearing last week's shipments.
Day 4-18
You keep importing at the old rate. Every container clears customs at 25% instead of 50%. CBP hasn't updated ACE yet, so nothing flags. You don't know you're underpaying.
Day 19
Your broker emails you. "Heads up, rate changed on 8541.40." You owe retroactive duties, interest, and potential penalties on every entry filed since Day 0.
With TariffDiff: Minute 12
Your webhook fires. You know the exact HTS code, the old rate, the new rate, the effective date, and the Federal Register citation. Before your broker has even read the notice.
<15 min
From FR publication to your inbox
$0
Cost to get started
2
Sources: USITC schedule + Federal Register
Every change
Tracked since Jan 2026
Built on authoritative USITC and Federal Register data, the same sources CBP uses. Monitoring 29,794 HTS rate lines. Every rate change since January 2026.
"We caught the Feb 4 Section 301 adjustment 13 days before our broker mentioned it." — Anonymous Importer
How It Works
Fast alerting with authoritative confirmation.
Phase 01 — Preliminary
Within minutes of a Federal Register publication, you get a preliminary alert. The exact HTS code, the proposed change, and the citation. Enough to start planning.
Phase 02 — Confirmed
When the official USITC schedule updates, we diff every rate line. You get the confirmed before/after rate, the effective date, and the legal citation. Audit-ready.
API
Structured events you can pipe straight into your systems.
Try It Live
Hit the live API right now. Enter your API key and any HTS code.
No key yet? Create one free in 10 seconds.
The alternative
Current process
With TariffDiff
Built for Brokers
Every client gets their own watchlists, their own webhook, their own alert history. You stop forwarding emails. They stop wondering if you're on top of it.
Create sub-accounts for each importer. Assign HTS watchlists per client. One API key, complete coverage across your entire book of business.
Route alerts to client-specific endpoints. Each client gets their own webhook URL and signing secret. No more forwarding emails.
Every alert is timestamped, hash-addressed, and tied to a specific client. When CBP asks when you knew, you have the receipt.
Pricing
A single retroactive duty assessment on a high-volume code: $50K-$200K in back-duties, interest, and penalties. A year of TariffDiff Professional: $9,588. You don't need us to catch every change. You need us to catch the one that matters.
Starter
$299/mo
billed annually at $2,988
For single-product importers. 25 codes, full alerting.
Cancel anytime. No contracts.
Professional
$799/mo
billed annually at $7,908
For brokers. Unlimited clients, 200 codes, per-client routing.
Cancel anytime. No contracts.
Enterprise
$2,499/mo
billed annually at $24,948
For compliance teams. Unlimited codes. SLA-backed.
Cancel anytime. No contracts.