Glossary/
Customs Bond

Customs Bond

A customs bond is a contract in which a surety guarantees to US Customs and Border Protection that an importer will pay the duties, taxes and fees it owes and meet CBP's requirements. CBP will not release a formal entry without one. Importers buy either a continuous bond or a single-transaction bond, usually through their customs broker.

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Reviewed September 2026.

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All glossary terms|Customs Bond

Continuous vs single-transaction bond: a continuous bond covers every entry the importer files while it is in force; a single-transaction bond covers one entry only.

What is a customs bond?

A customs bond is a three-party contract between the importer (the principal), a surety company and U.S. Customs and Border Protection (CBP). The surety guarantees that the importer will pay the duties, taxes and fees CBP assesses and will meet the conditions set out in 19 CFR part 113; if the importer defaults, CBP can collect from the surety. The bond is filed on CBP Form 301, and the conditions for importers are in 19 CFR 113.62.

Continuous vs single-transaction bond

  • Continuous bond: one bond that covers all of the importer's entries, at every port, for as long as it stays in force. It suits anyone who imports more than a few times a year
  • Single-transaction bond: covers one entry. CBP's guidance sets it generally at no less than the entered value plus all duties, taxes and fees, and at three times the value for restricted merchandise

When you need one

Under 19 CFR 142.4, CBP will not release merchandise on a formal entry unless a single-entry or continuous bond containing the 113.62 conditions is on file, or cash or U.S. government obligations are deposited in its place. Shipments valued over $2,500, the informal entry ceiling in 19 CFR 143.21, and some lower-value goods go through formal entry. Separate bond types cover other activities, such as custodial, international carrier and foreign-trade zone operator bonds.

How CBP sizes a continuous bond

CBP's bond guidance (A Guide for the Public: How CBP Sets Bond Amounts, February 2024) sets the minimum continuous importation bond at the greater of $50,000 or 10% of the duties, taxes and fees the importer paid in the previous 12 months. Bonds are set in increments of $10,000 up to $100,000 and in increments of $100,000 above that. CBP reviews bonds periodically; if it finds one insufficient, the importer has 15 days from notice to increase it (19 CFR 113.13).

Who issues a customs bond

A surety company listed in the Treasury Department's Circular 570, the register of companies approved to write federal bonds (19 CFR 113.37). Importers usually arrange the bond through their licensed customs broker or a surety agent, who files it with CBP.

ISF bonds

The Importer Security Filing (ISF) also needs a bond. Under 19 CFR 149.5(b) the ISF importer must hold a basic importation and entry bond with the 113.62 provisions, a custodial, international carrier or foreign-trade zone operator bond, or an ISF bond under Appendix D to part 113. If it has none, the agent submitting the ISF may post its own bond. CBP's guidance sets an ISF-only continuous bond at no less than $50,000 and an ISF single-transaction bond at no less than $10,000. An importer that already holds a continuous importation bond is normally covered.

How Airlift fits in

Airlift is an FMC-licensed NVOCC, not a licensed customs broker, and it does not write bonds. On the shipments it books, Airlift files the ISF through its ISF filing service and coordinates the entry with a licensed customs broker through its customs clearance service. The broker can arrange a continuous or single-transaction bond if you do not already have one.

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