Carrying cash from Thailand to United States
Two separate rules apply to any cash journey: one where you leave, one where you arrive.
Do you need to declare?
Part of this route is a hard limit, not paperwork. Leaving Thailand, Bank of Thailand (exchange control) caps what you may carry at THB 50,000, a prohibition, not a form. Entering United States, U.S. Customs and Border Protection requires a declaration above USD 10,000. The two rules are independent: satisfying one does not satisfy the other.
Travelling as a family or group?
The threshold applies to your combined total, not per person. A family of four each carrying a little under the limit is still over it, and splitting cash between travellers to stay under does not make it legal.
The two legs
| Leg | Limit | Form | Authority |
|---|---|---|---|
| Leaving Thailand | max THB 50,000 | no form | Bank of Thailand (exchange control) |
| Entering United States | USD 10,000 | FinCEN Form 105 (CMIR) | U.S. Customs and Border Protection |
Thai baht banknotes may be taken out up to THB 50,000 per person, rising to THB 2,000,000 for travel to Cambodia, Laos, Malaysia, Myanmar, Vietnam and the Yunnan province of China. Foreign currency banknotes may be taken out only up to the amount bought from an authorised bank or money changer. A customs declaration is required above THB 450,000 or USD 15,000 equivalent.
There is no limit on how much you may carry; amounts over USD 10,000 must be reported.
If you do not declare
United States: Seizure of the currency and possible civil and criminal penalties.
There is no limit on how much you may legally carry in either direction, the duty is to report it, not to keep under it. Failing to report is the offence.
Currencies
Thailand uses THB; United States uses USD.
Sources: rules as of 22 September 2026. This is general information, not legal advice; always check the official authority before travelling.