Global Trade,
Precisely Calculated
Instant duty rates, Section 301 stacking, IEEPA surcharges, and CBP fees — all in one deterministic API call. No AI guessing. Official government data only.
Popular right now
Everything you need for
global trade compliance
From single lookups to high-volume bulk processing — DutyFlow adapts to your workflow.
Global Coverage
UniqueFull coverage: all 99 HTS chapters for US imports. WTO MFN rates and bilateral trade data for 200+ origin countries.
Tariff Stacking
AccurateSection 301 (China), Section 232 (steel/aluminum), IEEPA surcharges — all stacked legally and cited.
Sub-100ms API
FastOne REST call returns the resolved duty rate with source citations. Built for checkout flows and ERPs.
PDF Reports
PremiumGenerate branded PDF reports with full duty breakdowns, landed cost analysis, and source citations.
Historical Rates
AnalyticsQuery any rate at any point in time with the `as_of` parameter. Track tariff changes over time.
Bulk Processing
ScalableUp to 200 HTS codes per request. Webhooks for rate changes. MCP server for AI integrations.
Every tool you need,
built in
Explore each tool with real example data. All built into your dashboard — no extra integrations.
Duty Calculator
Full landed cost with tariff stacking, MPF, HMF, and VAT for 200+ destination countries.
HTS Browser
Search 30,000+ HTS codes with live Section 301, 232 & IEEPA measures shown per code.
Portable ADP machines < 10 kg
Portable, w/display, < 10 kg
ADP machine, notebook type
Bulk Calculator
Upload a CSV of up to 100 HTS codes and get a full duty breakdown for every row instantly.
| HTS | Origin | Duty | Rate |
|---|---|---|---|
| 8471.30.0… | CN | $1,914.48 | 38.3% |
| 6109.10.0… | VN | $3,850.00 | 16.5% |
| 9403.60.8… | MX | — | — |
AI Classifier
Describe your product in plain English — the AI returns the correct HTS code with confidence score.
Source Comparison
Compare duty costs for the same product from up to 10 different origin countries side-by-side.
Scenario Simulator
Model tariff hike scenarios — see exactly how a 10% or 25% increase affects your landed cost.
Current duty
$19,144.80
38.3% effective
After scenario
$29,144.80
58.3% effective
Extra cost
+$10,000.00
per 100 units
Impact
+20.0 pp
effective rate Δ
HTS Schedule Diff
Track rate changes, new codes, and description updates across HTS chapters over time.
Customs Docs
Auto-generate commercial invoices, packing lists, and customs declarations from your shipment data.
Duty Drawback
Calculate eligible duty drawback refunds when you re-export imported goods from the US.
Duties paid
$19,144.80
Re-export %
80%
Eligible drawback
$15,315.84
Filing deadline
5 years
One call.
Complete answer.
Pass an HTS code and country of origin. Get back a fully itemized duty breakdown with source citations, ready for your checkout or compliance workflow.
- Deterministic — same input, same output, always
- Per-line source citations (USITC, USTR, CBP)
- Historical rates with `as_of` parameter
- Bulk endpoint — 200 HTS codes per request
- Webhooks for rate change notifications
curl -X GET "https://api.DutyFlow.com/v1/duties/resolve" \ -H "X-API-Key: dfl_your_api_key" \ -d htsCode=8471.30.01.00 \ -d originCountry=CN \ -d value=5000
{
"htsCode": "8471.30.01.00",
"description": "Portable ADP machines < 10kg",
"originCountry": "CN",
"lineItems": [
{
"type": "BASE",
"description": "Base HTS duty",
"rate": 0,
"amount": 0,
"source": "USITC HTS 8471.30"
},
{
"type": "SECTION_301",
"description": "Section 301 — China 25%",
"rate": 0.25,
"amount": 1250.00,
"source": "USTR Action",
"chapter99": "9903.88.03"
},
{
"type": "MPF",
"description": "Merchandise Processing Fee",
"rate": 0.003464,
"amount": 31.67,
"source": "CBP 19 CFR 24.23"
}
],
"totalDuty": 1281.67,
"landedCost": 6281.67,
"effectiveRate": 0.2563,
"currency": "USD",
"updatedAt": "2026-06-21T00:00:00Z",
"disclaimer": "Estimate only · not legal advice"
}Simple, transparent pricing
Start free. Scale as you grow. No surprises.
Free
For exploration & prototyping
- 50 calculations / month
- 5 countries supported
- US HTS calculator
- HTS browser · AI Classifier · Playground
- 30-day history
- Community support
Starter
For small importers & growing teams
- 500 calculations / month
- 25 countries · US HTS + WTO MFN
- PDF reports (20/month)
- Bulk calculator (50 items/batch)
- HTS AI Classifier (unlimited)
- Origin Optimizer (top 3)
- API access (500 calls/mo)
- 1-year history · Email support
- SLA 99.9%
Business
For platforms & high-volume importers
- 5,000 operations / month
- All 200+ countries
- PDF reports (200/mo) · Bulk 500 items
- HTS AI Classifier (unlimited)
- Rate change alerts (100 codes)
- Origin Optimizer (15+ countries)
- Tariff Scenario Simulator · HTS Diff
- Customs Doc Generator · Drawback Calc
- Webhooks (10 endpoints)
- API (5,000 calls/month)
- Priority support · SLA 99.95%
Start calculating in
under 5 minutes
Get an API key, make your first call, and see real duty rates in seconds. Free tier available forever.