What Not to Pack: US Customs Rules on Food, Plants, Medication, and Cash

Declare everything, every time

Every traveler entering the US fills out a customs declaration, either on paper, through the CBP mobile app, or at an airport kiosk, depending on your airport. The form asks whether you carry any food, plants, animal products, or more than $10,000 in cash or monetary instruments. Answer yes if you carry any of these, even a small amount, and let the customs officer decide whether you keep it.

Declaring something that gets refused costs you the item. Failing to declare something you carry, even by accident, costs you a fine and extra questioning, and it slows down everyone behind you in line.

Food, plants, and soil rules

US Customs and Border Protection and the US Department of Agriculture restrict most fresh and unprocessed food to stop pests and diseases from entering the country. Rules vary by the specific item and by the country you travel from, so treat every fresh or homemade food item as a question mark rather than an assumption.

• Fresh fruit, vegetables, and most fresh meat and meat products are commonly prohibited or need a permit

• Dairy products face restrictions that depend on the source country and processing method

• Soil, and items with visible soil on them, count as high risk and are often refused outright

• Seeds, plants, and cuttings need inspection and sometimes a permit before they enter

• Commercially packaged, shelf-stable snacks and spices are more often allowed, but you still declare them

Check the current item-by-item rules on cbp.gov and aphis.usda.gov before you pack any food from home, since specific allowances change by country and by season.

Bringing medication legally

Pack prescription medication in its original, labeled container, not in a pill organizer or unlabeled bag. Carry a copy of your prescription or a letter from your doctor stating the medication name, dosage, and why you need it, written in English where possible. Pack medication in your carry-on rather than checked luggage, in case your bag arrives late.

Bring only the amount you need for your personal use during your stay. Controlled substances face extra scrutiny and some stay barred even with a valid prescription from your home country, so check fda.gov guidance on bringing medication into the US and confirm your specific medication is allowed before you travel. If you take a controlled substance under prescription, contact your university's international student office or a US doctor ahead of arrival to arrange a legal supply once you land.

The $10,000 cash rule

Federal law requires anyone entering the US to report cash and other monetary instruments, such as traveler's checks and money orders, once the total value reaches $10,000. This limit applies to your combined total, not per item, and to your whole traveling family group together, not per person. Splitting money between family members to stay under the limit is a federal offense on its own.

Report the amount on FinCEN Form 105, available through CBP at the port of entry. Carrying over $10,000 is legal.

Failing to report it is not, and officers seize undeclared cash even when you prove where it came from. Details on the current process are on cbp.gov .

Other items customs officers check

Beyond food, plants, medication, and cash, CBP asks about wood items, animal products such as leather goods, and tobacco or alcohol beyond personal-use limits. Declare anything unusual you carry rather than guess whether it qualifies, since a question costs you seconds and a wrong guess costs you the item or a fine.

What counts as a monetary instrument

The $10,000 reporting rule covers more than paper cash. It includes traveler's checks, money orders, and negotiable instruments in bearer form.

It does not include amounts loaded onto a personal debit or credit card, since those are not physical instruments you carry across the border. If you plan to bring a large amount of money for tuition or living costs, consider a bank transfer instead of cash, since a transfer avoids both the reporting process and the risk of loss or theft.

What happens if you get it wrong

An undeclared food item usually ends with the item taken and, in repeat or larger cases, a civil fine.

An undeclared cash amount over $10,000 risks the entire amount getting seized, with a legal process to recover it that takes time and sometimes a lawyer.

Neither outcome helps your first days in the US, so build ten extra minutes into your arrival plan to declare accurately rather than rush through the line.

Packing checklist