HTS Hero vs AMZ Prep Tariff Calculator
AMZ Prep's calculator is fine for a ballpark figure. If the number feeds a price, a margin or an audit, HTS Hero gives you the full stack, the base rate included, line by line.
No demo, no sales call, no contract. Last checked .
Which should you use?
Choose HTS Hero if
Our pick for most importers- You need the exact total, base rate included
- You want to see each tariff with its Chapter 99 heading
- You sell many SKUs and want catalog-wide reports
Choose AMZ Prep Tariff Calculator if
- You want a quick rough number and nothing else
HTS Hero and AMZ Prep Tariff Calculator, feature by feature
What each tool offers a US importer, from its public website.
| Feature | Our toolHTS HeroFree, then from $14.99/mo | AMZ Prep Tariff CalculatorFree |
|---|---|---|
| Free to tryYou can calculate a real duty without paying. | YesFree to start, no sign-up | Yes |
| Start without a demo or sales callSign up and use every plan yourself, with no demo, contract or freight account. | YesEvery plan is self-serve, with no demo or contract | Yes |
| Pricing publishedEvery paid plan's price is on the website. | Yes | YesFree |
| Every Chapter 99 tariff, line by lineThe base rate plus Section 232, Section 301 and every other additional duty, each as its own line with exemptions applied. | YesEach tariff on its own line, with its Chapter 99 heading and legal note | PartlyFlat country and sector rates; excludes the MFN base duty |
| Trade agreements and preference programsClaim USMCA, CAFTA-DR, KORUS and other programs and see the preferential rate. | YesUSMCA, CAFTA-DR, KORUS and every program on the line | PartlyUSMCA and EU as country flags |
| Exemption questions that change the dutyAnswer the facts that unlock exemptions (metal content, generics, donations and more) and see the new total. | YesAnswer each question and see the new total | PartlyNotes 22 exempt codes without changing the total |
| Audit past entries by dateCalculate the duty that applied on an entry date, to check what you paid. | YesEntry audits, with verified rates back to April 2026 | No |
| Duty over timeSee how a product's duty changed across HTS revisions. | YesDuty Over Time, revision by revision | No |
| Alerts when a tariff change hits your productsLoad your catalog once and hear when a change affects it, with the duty impact on each product. | Paid planTariff Tracker alerts, with the cost to each product | No |
| Compare countries of originThe same product's duty from several countries, side by side. | Yes | PartlyOne country at a time |
| Bulk upload (CSV)Add many products at once. | Paid planTariff Tracker | No |
| HTS classification helpGuidance to find and document the right HTS code for a product. | Paid planHTS Hero Classify, with CROSS rulings | NoIts HTS lookup doesn't change the result |
| API, MCP and ERP/TMS integrationGet tariff results inside your ERP, TMS, internal tools or AI assistant. | On requestAPI and MCP; plugs into ERP, TMS and internal tools | No |
| Public changelog of rate updatesA dated record of every change to the tool's tariff data. | Yes | PartlyA dated update banner |
What actually sets them apart
A complete total
AMZ Prep's page says its rates exclude standard MFN duties, so the base rate is yours to look up and add. HTS Hero always starts from the HTS base rate and stacks every Chapter 99 tariff on top, with exemptions and fees.
Current rates
When we checked, AMZ Prep listed a 10% China reciprocal tariff. The IEEPA tariffs, reciprocal tariffs included, ended in February 2026. HTS Hero applies each HTS revision and logs it in a public changelog.
What each one costs
Free, then from $14.99/mo
Free to start, no sign-up. Tariff Calculator $14.99/mo for unlimited calculations. Tariff Tracker from $49/mo for your product catalog. Classification from $39/mo. Monthly plans, no contract, 10% off annually.
Free
Free to use.
Plug HTS Hero into your ERP, TMS and internal systems
Get every tariff, exemption and fee for an import wherever you price, plan or file: in your ERP, your TMS, your own tools or an AI assistant. We'll set it up with you.
- Tariff results by API, for your ERP, TMS or internal tools
- An MCP server, so AI assistants can calculate duty
- The same line-by-line results as the calculator
Switching from AMZ Prep Tariff Calculator? Try HTS Hero free.
Enter an HTS code and a country of origin and see the full US duty: the base rate, every Chapter 99 tariff and the fees. When you need unlimited calculations, it's $14.99 a month.
- Free to start, no sign-up: every tariff on your import, line by line
- Published prices, monthly plans, no contract
- No demo, no sales call, no freight account
- Start in about a minute
Questions
Is AMZ Prep's tariff calculator accurate?
It's useful for an estimate, but its page says its rates exclude standard MFN duties, and when we checked on October 6, 2026 it listed a 10% China reciprocal tariff. For an exact total, use a calculator that stacks the base rate and every Chapter 99 tariff.
Compare HTS Hero with other tools
- The best US tariff calculators in 202612 tools, ranked and compared
- HTS Hero vs Flexport Tariff SimulatorFree calculator from a freight forwarder
- HTS Hero vs Avalara AvaTax Cross-BorderCross-border duty and tax API for ecommerce
- HTS Hero vs Zonos Landed CostLanded cost at checkout for cross-border ecommerce
- HTS Hero vs SimplyDutyGlobal duty calculator and API
- HTS Hero vs GingerControlFree calculator with paid compliance tools
- HTS Hero vs Gateway Tariff CalculatorFree calculator from a freight forwarder
- HTS Hero vs TariffsAPITariff API with a free calculator
HTS Hero makes one of the tools on this page. We checked every claim about other tools against their public websites on October 6, 2026 and link our sources below. If something has changed, email [email protected] and we'll update it.
Sources
The official documents this article is based on