Customs Guide for Travelers Entering Colorado, United States

All travelers entering Colorado must clear U.S. Customs and Border Protection, declare all items acquired abroad, and comply with federal regulations on prohibited/restricted goods, with penalties for non-compliance.

U.S. Customs Overview for Arrivals in Colorado

U.S. Customs and Border Protection (CBP) enforces federal laws for all international arrivals. This process is uniform at all U.S. ports of entry, including those in Colorado.

Process Stage	Location	Primary Authority	Key Purpose
Primary Inspection	Federal Inspection Services Area	CBP Officer	Passport/Visa Verification, Initial Questions
Baggage Claim	Baggage Carousel	Traveler Responsibility	Retrieve Checked Luggage
Customs Inspection	Customs Hall	CBP Officer	Declaration Review, Baggage Examination
Secondary Inspection (if needed)	Designated Screening Area	CBP Specialist	Detailed Examination, Agricultural Screening

Important

All persons, including U.S. citizens, are subject to inspection. Providing false or misleading information to a CBP officer is a violation of federal law (18 U.S.C. § 1001).

Customs Declaration and Inspection Procedures

Complete the Declaration Form

You must complete a CBP Declaration Form (6059B) for each family. This is typically distributed on your flight or available at Automated Passport Control kiosks. Declare all items acquired abroad, including gifts and duty-free purchases.

Present Documents

Have your passport, visa (if required), and completed declaration form ready for the CBP officer. Answer all questions truthfully and completely.

Baggage Examination

CBP officers have the authority to examine all luggage, including electronic devices. Be prepared to open your bags if requested. Cooperation is required by law.

Duty-Free Allowances and Tax Calculation

The following table outlines general exemptions for personal purchases. Note that special rules apply to alcohol, tobacco, and gifts sent separately.

Traveler Status	Exemption Value	Alcohol Limit	Tobacco Limit	Notes
Returning U.S. Resident	$800	1 liter	200 cigarettes	Personal use only. Must be in your possession.
Visiting Foreign National	$100	1 liter (if 21+)	200 cigarettes (if 21+)	Gift exemptions differ. Cannot include alcohol/tobacco under this exemption.
From Insular Possessions (e.g., U.S. Virgin Islands)	$1600	5 liters (1 from non-US)	1000 cigarettes	Special rules apply; not more than $800 can be from non-US sources.

Duty and Tax Payment

Items exceeding your duty-free allowance will be subject to duty and tax, calculated based on the item's value and country of origin. Payment can typically be made by cash, credit card, or traveler's check at the port of entry.

Currency Reporting Requirements

Report $10,000 or More

Federal law (31 CFR § 1010.340) requires you to file a FinCEN Form 105 if you are carrying currency or monetary instruments totaling $10,000 or more (or foreign equivalent) upon entry or exit. This includes coin, currency, traveler's checks, and negotiable instruments.

Failure to Report

Failure to report may result in seizure of the currency and penalties may include substantial fines. There is no limit on how much money you can bring in or take out, but it must be reported.

Bringing Medication and Medical Devices

Prescription Medication

Carry medication in its original container with the pharmacy label. A doctor's note or prescription is strongly recommended, especially for controlled substances or injectable medications.

Controlled Substances

Medications containing narcotics or other controlled substances require a valid prescription and may be subject to additional scrutiny by the DEA. Verify that your medication is legal in the U.S. before travel.

Medical Devices

Declare any medical devices (e.g., syringes, CPAP machines). Carry documentation from your physician explaining their medical necessity.

Agricultural and Food Product Restrictions

Item Category	Generally Allowed?	Special Requirements	Common Prohibitions
Commercially Packaged, Processed Foods	Usually Allowed	Must declare. Must be for personal use.	None if meat-free and properly packaged.
Fresh Fruits & Vegetables	Generally Prohibited	Very few exceptions. Requires permit and inspection.	Most are prohibited to prevent pest introduction.
Meat, Poultry, & Products	Generally Prohibited	Strictly regulated. Canned, shelf-stable may be allowed from certain countries.	Most fresh, dried, or frozen meats from restricted regions.
Plants, Seeds, Soil	Generally Prohibited	Requires phytosanitary certificate and permit from USDA.	Most plants with soil, many seeds without documentation.

Best Practice

When in doubt, declare all agricultural items to the CBP officer. Failure to declare can result in penalties and immediate disposal of the items.

Prohibited and Restricted Items List

Illegal Items

Narcotics and illegal drugs, drug paraphernalia, and counterfeit goods (e.g., pirated software, fake designer items) are strictly prohibited.

Hazardous Materials

Explosives, fireworks, flammable items, and toxic chemicals cannot be transported in baggage.

Protected Species (CITES)

Items made from endangered animals or plants (ivory, tortoiseshell, certain furs, coral) require special permits and are often prohibited.

Cultural Artifacts

Antiquities and cultural property from other countries may require export documentation from the country of origin.

Process at Denver International Airport (DEN)

Step 1: Deplane and Follow Signs

After exiting your international arrival gate, follow signs for "Federal Inspection Services" or "Passport Control."

Step 2: Primary Inspection

U.S. citizens and eligible foreign nationals may use the Automated Passport Control (APC) kiosks to expedite the process. Others will proceed to a CBP officer for passport and document review.

Step 3: Baggage Claim and Customs

Proceed to the baggage claim area to collect your checked luggage. Then, proceed to the customs inspection area with your bags and declaration form.

Step 4: Exit and Re-check

If you have a connecting domestic flight, you will typically re-check your bags immediately after clearing customs at designated drop-off points.

Frequently Asked Questions (FAQ)

What items are prohibited from entering Colorado?

A. Prohibited items include most fresh fruits and vegetables, certain plants and seeds, meats from restricted countries, illegal narcotics, counterfeit goods, and items made from endangered species (CITES).

Do I need to declare the cash I am carrying?

A. Yes. You must report to U.S. Customs and Border Protection (CBP) if you are carrying currency or monetary instruments totaling $10,000 or more (or its foreign equivalent) upon entry or exit.

What are the duty-free allowances for entering the U.S.?

A. Travelers are generally allowed a duty-free exemption of $800 for personal purchases. There are specific limits on alcohol, tobacco, and gifts. Amounts above the exemption may be subject to duty and tax.

Can I bring prescription medication into Colorado?

A. Yes, but medication must be in its original container with the doctor's prescription or a letter from your physician. Controlled substances require additional documentation and must comply with U.S. Drug Enforcement Administration (DEA) regulations.

What happens if I do not declare an item?

A. Failure to declare items can result in seizure of the goods, and penalties may include substantial fines. Intentional concealment can lead to more severe legal consequences.

Are there agricultural restrictions?

A. Yes. To prevent pests and diseases, strict rules govern the import of fruits, vegetables, plants, soil, and certain animal products. Always declare such items to a CBP officer.

How does customs process work at Denver International Airport (DEN)?

A. After deplaning on an international flight, you will proceed to the Federal Inspection Services area for passport control, baggage claim, and customs inspection. Follow CBP officer instructions and use the Automated Passport Control (APC) kiosks if eligible.

Where can I get more information?

A. The primary resource is the U.S. Customs and Border Protection (CBP) website. You can also contact the CBP Information Center or consult with your airline before travel.

Official U.S. Customs Resources

U.S. Customs and Border Protection (CBP) Official Website
CBP Info Center: 1-877-227-5511
CBP "Know Before You Go" Traveler Brochure
U.S. Department of Agriculture (USDA) - Animal and Plant Health Inspection Service (APHIS)
Centers for Disease Control and Prevention (CDC) - Travelers' Health
U.S. Fish and Wildlife Service (FWS) - International Affairs

Disclaimer

This guide is for informational purposes only and does not constitute legal advice. Customs regulations are complex and subject to change. Travelers are solely responsible for complying with all applicable U.S. federal laws, including those enforced by U.S. Customs and Border Protection (CBP), the Department of Agriculture (USDA), the Food and Drug Administration (FDA), and other agencies. Penalties for non-compliance may include seizure of goods, denial of entry, and may include substantial fines. Always consult the official U.S. CBP website (cbp.gov) or contact CBP directly for the most current and authoritative information before you travel. This information is provided "as is" without warranty of any kind.