Foreigners wishing to extend their stay in the case of investment must apply for a visa extension under Section 15 of the Immigration Act 1979 (diplomat, official), with the following requirements:

1. TM.9 form;

2. Medical certificate from a public hospital (not older than 3 months);

3. Letter certifying that the applicant has no criminal record from the country where he or she is domiciled; the letter must be certified by the Thai consulate in that country or certified by the consulate of that country in Thailand;

4. Copy of the document showing the applicant's academic qualifications, certified by the consulate of that country in Thailand;

5. Previous employment certificate from the Office of Foreign Workers Administration, and copies of all work permits, every book, every page;

6.  Salary certification letter from the company where the patron has worked for the past 2 years;

7. Copy of the personal income tax return (PND.91 or PND.90) of the applicant with withholding tax under section 50 bis for 3 years prior to the year of application submission; 

8. Copy of the withholding tax return (PND.1) from the beginning of the year until the month prior to the application submission certified by the officer of the Revenue Department together with a copy of the receipt (if any);

9. Certificate of money transfer into the Kingdom from a bank in Thailand in the total amount of not less than 10 million baht;

10. Proof of investment on behalf of the applicant either or i in  the total amount of not less than 10 million baht in the following cases:

 (1) Invest in a limited company or a public limited company;

 (2) Invest in government bonds or bonds;

 (3) Invest in the stock market, such as common shares, debentures;       

11. Map showing place of residence and workplace;

12. Copy of passport showing permission to stay for at least 3 years (every book, every page);

13.  Personal data form and photos of the foreigner outside the workplace (alone), inside the workplace with other employees, outside the factory (alone), inside the factory with other workers, machines and products (if any), photos of the foreigner outside his or her residence, inside the residence with his or her family (if any), totaling 10 photos, postcard size, each photo mounted on A4 size corporate head paper with captions under each photo;

14. Other documents that the competent official deems appropriate to request.

Information as of 8 February 2023

Source: Immigration Office

Tel. 1178 or +66 2572 8500