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US Customs Duty Calculator

Calculate U.S. import duty with our free US customs duty calculator. Check customs duty, specific duty, compound duty, and MPF with easy steps.

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e.g. international freight/insurance properly identified are generally excluded from transaction value.
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CBP's current MPF rate, minimum, and maximum change over time — verify the current figures on CBP's website before relying on this estimate. The 0.3464% default reflects a commonly cited formal-entry rate, but always confirm.
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Used when the HTSUS specifies a fixed dollar amount per unit rather than a percentage of value.
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Verify CBP's current MPF rate and min/max before relying on this estimate.
Used when the HTSUS entry specifies both an ad valorem percentage and a specific per-unit rate.
Published by a2zcalculators Team · 27 views

A US customs duty calculator helps you estimate import duty fast. It turns your item value and duty rate into a clear result. You can also check specific and mixed duty cases.

Before you start, find the right HTS code for your goods. The Harmonized Tariff Schedule lists U.S. duty rates. Rates can differ by product and trade program. The current 2026 HTS is available online.

US Customs Duty Formula

For an ad valorem duty, use this formula:

Customs Duty = Customs Value × (Duty Rate ÷ 100)

Your customs value may use the transaction value method. In simple cases, it starts with the price paid. Some costs may need to be added. Some costs may stay out. CBP rules decide the final value.

If your item has a specific duty, use:

Specific Duty = Number of Units × Duty Per Unit

For a mixed rate, use:

Total Duty = Ad Valorem Duty + Specific Duty

If you add MPF, use:

MPF = Customs Value × (MPF Rate ÷ 100)

For formal entries in fiscal year 2026, CBP lists an MPF rate of 0.3464%. The fee has a $33.58 minimum and a $651.50 maximum. A manual filing can add $4.03. Rules and exemptions may apply.

How to Use Online US Customs Duty Calculator

  1. Choose the duty type. Pick ad valorem, specific, or compound.
  2. Enter your customs value. You can build it from price, additions, and exclusions.
  3. Enter the duty rate. Use the rate tied to your HTS code.
  4. Add unit data when needed. Specific and compound rates need unit counts.
  5. Click calculate. The tool shows the duty and any MPF you select.

Example US Customs Duty Calculation

Say you import goods worth $10,000. The duty rate is 8%.

Customs Duty = $10,000 × 8%

Customs Duty = $800

Now add the 2026 formal MPF rate.

MPF = $10,000 × 0.3464%

MPF = $34.64

The MPF is above the $33.58 minimum. It is below the $651.50 cap.

Total = $800 + $34.64

Total = $834.64

This example shows the math. Your real charge may differ. The HTS code, origin, entry type, and special tariff rules can change the result. The HTS also has special rates and other tariff provisions for some goods.

Final Verdict

Our US customs duty calculator makes import math simple. It can handle ad valorem, specific, and compound duty. It can also add MPF when you choose it.

Think of the tool like a quick checkout total. You enter the key numbers. It does the math for you. Still, check the current HTS and CBP rules before you file an entry.

FAQs

How to calculate customs duty in the USA?

Find the HTS code and its duty rate. Then find the customs value. Multiply the value by the duty rate. Add any specific duty or fee that applies.

How much will U.S. Customs charge me?

It depends on your goods, value, origin, HTS code, and entry type. Some goods may also face extra tariff rules.

Is this a US import duty calculator free tool?

Yes. You can use this US import duty calculator free online. Enter your data and get a quick estimate.

Does customs duty include MPF?

Not always. MPF is a separate CBP user fee. Some entries may have an exemption or a different fee.

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