Custom Duty Calculator - Import Duty and Tax Estimate
Answer: A custom duty calculator estimates customs value times the duty rate, then adds additional tariffs, import tax, broker fees, and other import charges.
- This is a planning estimate, not an HTS classifier or legal customs opinion.
- Use the country-specific duty rate, tax base, valuation rule, and broker instructions for the destination market.
- U.S. importers should use /tools/u-s-customs-duty-calculator/ for MPF, HMF, and U.S.-specific entry logic.
A custom duty calculator estimates customs value times the duty rate, then adds additional tariffs, import tax, broker fees, and other import charges.
How the calculation works
This page is a broad keyword-variant page for people who search “custom duty calculator” instead of “customs duty calculator.” It is useful for early planning when you know the goods value, freight and insurance amount, duty rate, and import-tax rate, but it is not a product classifier or legal customs opinion.
The calculation uses this planning model:
| Line item | Formula |
|---|---|
| Customs value | goods value + freight and insurance |
| Import duty | customs value x duty rate |
| Additional tariff | customs value x additional tariff rate |
| Import tax | (customs value + duty + additional tariff) x import tax rate |
| Estimated import charges | duty + additional tariff + import tax + broker fee + other import fees |
Canonical guidance: U.S. importers should use the U.S. customs duty calculator because it includes MPF, HMF, and U.S. entry logic. Searchers using “customs duty calculator USA” should use the USA customs duty calculator. This page stays active for the shorter “custom duty calculator” phrase and links users to the more specific tool when the country is known.
FAQ
What does custom duty mean?
Custom duty is commonly used in search queries to mean customs duty or import duty. The exact legal term and calculation depend on the destination country.
How do I calculate custom duty?
Start with the customs value, multiply it by the confirmed duty rate, then add additional tariffs, import tax, broker fees, and any other import charges that apply.
Is freight included in customs value?
It depends on the country and valuation rule. This calculator includes freight and insurance in the planning customs value for conservative landed-cost modeling, but your broker should confirm the correct value base.
Does this calculator choose an HS or HTS code?
No. You must confirm the HS or HTS classification before relying on any duty rate. If the product could fit more than one code, ask a broker or customs advisor.
What is the difference between duty and import tax?
Duty is usually based on product classification and origin. Import tax, VAT, or GST is often calculated on a broader base that may include customs value plus duty and other charges.
Which calculator should U.S. importers use?
Use the U.S. customs duty calculator for U.S. imports because it includes MPF, HMF, additional tariff, and post-2025 de minimis guidance.
Can I use this for a final customer quote?
Use it as a planning estimate only. Final quotes should be checked against live customs data, broker instructions, origin evidence, valuation rules, and any trade-remedy measures.
Comparison
| Tool | Best for | Difference |
|---|---|---|
| Custom duty calculator | Broad early import-duty planning | Generic model for the common search phrase |
| U.S. customs duty calculator | U.S. import duty, MPF, HMF, tariffs | Country-specific U.S. logic |
| Customs duty calculator USA | USA keyword variant and landed-cost explanation | Same conservative U.S. framework with USA search wording |
| Landed cost calculator | Product cost after freight and import charges | Broader total-cost model |
| DDP shipping cost calculator | Seller-paid door-to-door quote check | Includes DDP margin and risk buffer |
Dated facts
As of May 2026, import-duty planning should still be treated as country-specific because customs value, duty rate, additional tariffs, VAT/GST base, filing fees, and broker requirements vary by market. For U.S. imports, duty-free de minimis treatment has been suspended globally since August 29, 2025, so low-value shipments should not be treated as automatically duty free. For any destination, the duty rate should be checked against live tariff schedules before booking freight or quoting a customer.
Frequently asked questions
- What does this custom duty calculator estimate?
- It estimates import duty from customs value and duty rate, then adds optional additional tariff, import tax, broker fee, and other import fees.
- Is custom duty the same as customs duty?
- In search behavior, custom duty is often a shorthand or misspelling of customs duty. This page keeps that wording but uses customs-duty planning logic.
- Does this classify my product?
- No. You must confirm the product classification, country of origin, customs value, and destination-country rules separately.
- Which page should U.S. importers use?
- U.S. importers should use /tools/u-s-customs-duty-calculator/ for MPF, HMF, and U.S.-specific entry logic.
- Does this include import VAT or GST?
- Yes, if you enter an import tax rate. The tax base used here is customs value plus duty and additional tariff, but country rules can differ.