Carrying cash from Thailand to United Kingdom
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 Kingdom, HM Revenue & Customs requires a declaration above GBP 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 Kingdom | GBP 10,000 | Declare cash online (GOV.UK) or form C9011 | HM Revenue & Customs |
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.
Declare cash of GBP 10,000 or more carried between Great Britain and any other country. Northern Ireland has separate rules.
If you do not declare
United Kingdom: Cash may be seized and a penalty of up to GBP 5,000 applied.
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 Kingdom uses GBP.
Sources: rules as of 22 September 2026. This is general information, not legal advice; always check the official authority before travelling.