Duty Calculator
Full tariff stack. Every layer. Always current.
The only free calculator that shows broker-grade detail — MFN base, Ch99 codes in ACE reporting order, Section 301, Section 232, IEEPA, AD/CVD advisory, MPF/HMF, SPI eligibility, and PGA flags.
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13k+
tariff codes
100%
cite-able sources
<2s
calculation time
What's inside
Complete tariff decomposition
MFN base rate, every applicable Ch99 code in ACE reporting order, Section 301 (Lists 1-4E), Section 232 (steel/aluminum), IEEPA, and AD/CVD advisory — broken down layer by layer.
Ch99 codes in ACE reporting order
Not just which Ch99 codes apply — the exact reporting sequence your broker needs for the 7501 entry summary. Miss a code or put them in the wrong order? Liquidation penalty.
AD/CVD advisory
Flags when AD/CVD orders may apply to a product, with case numbers and current deposit rates. Most calculators show a banner. Ours shows the specific orders.
SPI eligibility
Shows which Special Program Indicators (GSP, USMCA, CAFTA-DR, etc.) could reduce duties — and by how much. Eligibility detection based on HTS code and country of origin.
PGA flags
Identifies when Partner Government Agency requirements apply — FDA, EPA, CPSC, FCC, APHIS, and more. Know before you ship whether your product needs agency clearance.
Federal Register citations
Every rate links to its legal authority — Presidential Proclamation, Federal Register notice, HTSUS General Note. Verify the reasoning, not just the number.
What a duty calculation looks like
HTS 7324.10.0000
Stainless steel sinks — China
MFN Base Rate
7324.10.00
Section 301 (List 3)
9903.88.03
Section 232 (Steel)
9903.80.01
IEEPA (China)
9903.01.25
AD/CVD Advisory
A-570-983
MPF
HMF
Estimated total duty
198.5%+
Illustrative example. Actual rates depend on entry date and specific product characteristics.
The scenario
A broker at a mid-market forwarder receives a shipment of stainless steel sinks from China. She needs the total duty picture before the importer commits.
She opens the USITC database, finds HTS 7324.10.0000. Base rate: 3.4%. But that's just the start. She checks the Section 301 list — List 3 at 25% applies. She checks Section 232 — stainless steel, 25%. Wait, is there an IEEPA surcharge too? She checks CBP CSMS messages. Then AD/CVD — are there antidumping orders on stainless steel sinks from China? She searches the Federal Register. Case A-570-983. Current rate: 76.53% for most manufacturers. But which Ch99 codes apply? And in what order for ACE reporting?
Thirty minutes later, she has a number she's mostly confident in. No audit trail. No citations. If she picked the wrong Ch99 code order, CBP will reject the entry at liquidation.
With Tandom, she types the HTS code and country. Two seconds later: every layer, every Ch99 code in ACE order, every citation. Done.
Try it now — free, no account required
The same engine that powers our API and enterprise integrations. Full tariff stack decomposition with broker-grade detail.
Open CalculatorWithout Tandom vs. with Tandom
Without Tandom
- ×Look up HTS code in USITC database
- ×Cross-reference Ch99 codes in Federal Register
- ×Check CBP CSMS for recent rate changes
- ×Manually calculate each tariff layer
- ×Search for AD/CVD orders separately
- ×15-30 minutes per product, error-prone
With Tandom
- ✓Enter HTS code, get the full picture instantly
- ✓Every Ch99 code in correct ACE reporting order
- ✓Rates auto-updated from Federal Register and CSMS
- ✓All layers calculated and cited in one view
- ✓AD/CVD advisory with case-level detail
- ✓Under 2 seconds, with audit trail
How it works
Enter HTS code or search by product
Type a 10-digit HTS code or search by product description. Select country of origin and entry date.
Get the full duty picture
Every applicable tariff layer, fee, and regulatory flag — calculated for your specific shipment parameters. With citations.
Use it downstream
Copy the breakdown for your entry summary, share with your importer, or use the API to integrate into your workflow.
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