If you’re planning to travel with cash, it’s important to understand US Customs regulations and airline security procedures to avoid trouble at the airport.

In the United States, there is no limit on the amount of cash or monetary instruments you can bring on a flight. However, if you’re traveling internationally, any amount over $10,000 must be declared to US Customs and Border Protection (CBP).

This guide covers:

• US Customs cash declaration rules
• International limits in other countries
• How to declare money at the airport
• Penalties for not declaring cash
• Tips for traveling with large sums of money

US Customs Regulations for Flying with Cash

When you enter or leave the US, you must declare cash or monetary instruments worth more than $10,000. This is part of America’s effort to prevent money laundering, terrorist financing, and other illegal activities.

The rule applies to:

• US dollars and foreign currency equivalents
• Traveler’s checks
• Money orders, cashier’s checks, and promissory notes
• Bearer bonds and negotiable instruments
• Precious metals and rare coins (considered cash for customs)

Important: The $10,000 limit applies to the total carried by a group, not per person. For example, a family of four each carrying $3,000 (total $12,000) must declare the amount.

Cash Limits in Other Countries

Different countries have their own cash declaration rules: