Best Tariff Analysis Tools & Import Duty Calculators (2026 Comparison)
Updated comparison of tariff calculators for 2026, including Flexport alternatives, Section 232 annex awareness, AI chat, bulk upload, and CF-7501 workflow support.
Updated April 2026 — This comparison now covers the April 2026 Section 232 annex changes and evaluates which tools handle the new 4-tier metals framework. Flexport-alternative considerations added below.
Best Tariff Analysis Tools & Import Duty Calculators (2026 Comparison)
With US tariff policy growing more complex — Section 301, Section 232, Section 122, anti-dumping duties, and trade agreement preferences all stacking on top of each other — importers need reliable tools to calculate their true duty exposure. A single misclassification or missed surcharge can cost thousands per shipment.
This guide compares the leading tariff analysis tools available in 2026, covering features, pricing, and the types of importers each tool serves best.
What to Look for in a Tariff Calculator
Before comparing specific tools, here are the key capabilities that matter:
- HS code lookup and search — Can you find the right tariff classification for your product?
- Tariff stacking — Does the tool calculate all applicable duties (base MFN + Section 301 + Section 232 + Section 122)?
- Country comparison — Can you compare rates across multiple sourcing countries?
- Trade agreement support — Does it account for FTA preferences (USMCA, KORUS, etc.)?
- Landed cost calculation — Does it include freight, insurance, and other import costs?
- Data freshness — How often are tariff rates updated?
- Bulk analysis — Can you upload a product catalog for portfolio-level analysis?
Tool Comparison Overview
| Feature | Flexport Tariff Simulator | SimplyDuty | TariffCenter.AI |
|---|---|---|---|
| Price | Free | Free tier (5 calcs/day) + paid plans | Free tools + paid plans from $19/mo |
| US tariff coverage | Yes | Yes (100+ countries) | Yes |
| Section 301 rates | Yes | Yes | Yes |
| Section 232 rates | Yes | Varies | Yes |
| Section 122 rates | Yes | Varies | Yes |
| HS code search | By code | By code | By code or product description |
| Country comparison | Side-by-side | Single country per lookup | 12-country comparison table |
| AI classification | No | No | Yes (image + text) |
| Bulk upload | No | API available | Yes (CSV upload) |
| FTA eligibility check | Limited | Limited | Yes (dedicated tool) |
| Account required | No | Yes (for paid features) | No (free tools) |
Note: Feature details are based on publicly available information as of March 2026. Capabilities may change — check each provider's website for current details.
Flexport Tariff Simulator
Flexport's Tariff Simulator is a free calculator launched in 2025 that estimates US customs duties for any commodity.
What it does well:
- Handles complex tariff scenarios including Section 232, Section 301, and anti-dumping duties
- Side-by-side rate comparison for alternative sourcing countries
- Interactive global trade map showing import volumes and average duty rates by country
- No account or registration required
Best for: Importers who need a quick, free duty estimate for individual shipments and want to compare a few sourcing countries side by side.
Limitations to consider: The tool is focused on US imports only and does not include AI-powered HS code classification or bulk analysis for product catalogs.
Source: Flexport Tariff Simulator
SimplyDuty
SimplyDuty is a UK-based duty and tax calculator covering 100+ destination countries.
What it does well:
- Broad international coverage — calculates duties for imports into over 100 countries, not just the US
- API access for integrating duty calculations into e-commerce platforms
- Regularly updated by a team of customs researchers
Best for: E-commerce sellers and international importers who need duty calculations for multiple destination countries, not just the US.
Limitations to consider: The free tier is limited to 5 calculations per day. Detailed US-specific tariff stacking (Section 301, Section 232) coverage may vary.
Source: SimplyDuty Pricing
TariffCenter.AI
TariffCenter.AI is an AI-powered tariff analysis platform built specifically for US importers navigating the current tariff landscape.
Free tools (no account required):
- HS Code Lookup — Search by product description or code number
- Import Duty Calculator — Calculate total effective rates including all surcharges
- Country Sourcing Comparison — Compare tariff rates across 12 countries
- FTA Eligibility Checker — Check free trade agreement qualification
- China Rate Calculator — See how duties stack on Chinese imports
- IEEPA Refund Estimator — Estimate post-SCOTUS refund amounts
- Duty Drawback Screener — Check drawback eligibility
Paid features (from $19/month):
- AI chat assistant that answers tariff questions in plain English
- AI-powered product classification from images and descriptions
- Bulk CSV upload for portfolio-level tariff analysis
- Refund tracking and compliance monitoring
- Real-time tariff alerts for rate changes
Best for: US importers — especially small and mid-size businesses — who need both free quick-lookup tools and deeper AI-powered analysis for complex tariff scenarios.
Other Notable Tools
Several other tools serve specific niches in the tariff analysis space:
- USITC Harmonized Tariff Schedule (hts.usitc.gov) — The official source for US tariff classifications. Free but requires knowledge of the HTS structure. No duty calculations.
- CBP CROSS Ruling Database — Official customs rulings database for classification precedents. Essential for complex classification questions.
- Avalara — Enterprise-grade trade compliance platform. Comprehensive but typically priced for large organizations.
- Descartes CustomsInfo — Professional-grade tariff database used by customs brokers. Subscription-based.
How to Choose the Right Tool
If you need a quick, free duty estimate for a single shipment: Start with any of the free calculators listed above. Enter your HS code, country of origin, and shipment value to get an instant rate.
If you import regularly and need to track changing rates: Look for tools with tariff alerts, bulk analysis, and historical rate tracking — features that help you stay ahead of policy changes rather than reacting to them.
If you're evaluating sourcing alternatives: Use a tool with country comparison features to model the total cost difference between, say, China (with Section 301 + Section 122 stacking) versus Vietnam, Mexico, or India.
If you need help with HS code classification: AI-powered classification tools can suggest the right code from a product description or image — reducing the risk of misclassification penalties.
Getting Started
The best approach is often to use multiple tools together:
- Look up your HS code with a search tool to confirm your classification
- Calculate your total duty including all applicable surcharges
- Compare sourcing countries to identify cost-saving opportunities
- Check FTA eligibility to see if trade agreement preferences apply
Most of these steps can be done for free. Start with the free HS Code Lookup or the Import Duty Calculator — no account required.
April 2026 refresh: what a serious tariff tool must handle now
The most useful comparison question in 2026 is not, "Which tool can show me an HTS code?"
It is, "Which tool can help me model the real landed-cost burden of a modern U.S. import entry?"
Updated comparison dimensions
| Tool | Free tier | HS code lookup | Section 232 April 2026 awareness | Section 301 coverage | Section 122 inclusion | AI / natural language | Bulk workflows | API / document workflows |
|---|---|---|---|---|---|---|---|---|
| TariffCenter.AI | Yes | Yes | Strong on current 4-annex framework | Yes | Yes | Yes | Yes | API plus customs-document workflows |
| Flexport Tariff Simulator | Limited/public workflow varies | Good for scenario modeling | Check current support carefully | Generally good on mainstream programs | May require validation | Limited conversational workflow | Limited for non-Flexport operations | Stronger freight context than customs-document parsing |
| SimplyDuty | Yes / low-friction search | Good | Validate against newest U.S.-specific changes | Broad duty lookup | Validate | No true AI workflow | Limited | Best for straightforward lookup workflows |
| Freightos tools | Yes | Useful for basic lookup | Not purpose-built for April 2026 annex nuance | Partial / depends on tool | Validate | No | Limited | Stronger freight context than customs operations |
| Easyship lookup tools | Yes | Useful for ecommerce basics | Not a specialized U.S. metals workflow | Partial / depends on use case | Validate | No | Ecommerce-oriented | Useful for merchant workflows, not deep customs modeling |
| CBP / USITC HTS resources | Free | Authoritative schedule data | Requires manual interpretation | Requires manual interpretation | Requires manual interpretation | No | No | Essential reference, not a modeling platform |
Where Flexport is stronger
Flexport is strongest when the importer wants tariff modeling tied tightly to freight execution and broader shipping workflows. If you are already inside that ecosystem, the convenience can matter.
Where TariffCenter.AI is stronger
TariffCenter.AI is stronger when the problem is U.S.-specific tariff analysis rather than freight booking:
- April 2026 Section 232 treatment for metals and derivatives
- AI-driven classification and scenario analysis
- refund-estimation and customs-document workflows
- tools designed around import-duty decision-making, not just shipment quoting
The best "Flexport alternative" question
If what you really need is a U.S.-tariff decision tool rather than a logistics platform feature, the best Flexport alternative is usually the one that handles classification, tariff stacking, and current policy nuance without assuming you are also buying freight through the same provider.