If you fail to declare cash when entering or leaving the United States, the money may be seized and you may face civil penalties. Carrying cash is legal, but not declaring required amounts can trigger enforcement action.
The reporting threshold is $10,000 or more in total, which applies when you carry more than $10,000 into the United States.
What happens
At the airport, travelers are required to declare if they are carrying more than $10,000 in cash or monetary instruments.
If you do not declare and CBP discovers the funds:
- The money may be seized immediately.
- You may be questioned about the source and purpose of the funds.
- Your belongings may be inspected in detail.
You may be referred to secondary inspection for further review where officers examine the situation in more detail.
Seizure can occur even if the money was legally obtained.
What determines the outcome
The outcome depends on:
- The total amount carried.
- Whether the failure to declare is considered intentional or not.
- Whether your statements are consistent during questioning.
CBP focuses on compliance with reporting requirements rather than proving criminal activity.
Failure to declare alone can be sufficient for seizure.
What it may lead to
Common outcome:
- Seizure of the undeclared funds.
Possible escalation:
- Civil penalties in addition to seizure.
- Administrative process to request return of funds.
Worst realistic outcome:
- Permanent forfeiture of the funds, including cases where CBP confiscates undeclared cash following enforcement action.
- Extended legal process to challenge the seizure.
Recovery of seized funds is not automatic and may require formal procedures.
Common escalation triggers
- Carrying more than $10,000 without declaring.
- Providing inaccurate or incomplete information.
- Dividing funds among travelers to avoid reporting.
- Concealing money in luggage or personal items.
What this depends on
Outcomes vary based on:
- The amount involved.
- How the funds were discovered.
- Statements made during inspection.
- Applicable federal procedures for seizure and forfeiture.
Enforcement is based on reporting violations, not on whether the funds are legal.
When federal authority applies
Currency reporting and enforcement at airports are handled by U.S. Customs and Border Protection under federal law.
Last reviewed: April 2026
This page describes typical operational outcomes. Individual cases vary.