Before securing a Thai Visa you need to consider the following: your nationality, length of stay in Thailand, purpose of stay.
Foreigners who wish to travel to Thailand in a long term may choose among various visa types. Siam Legal offers the following types of Thai Visa:
90-Day Non Immigrant Visa
This visa is valid as a single entry visa, meaning the holder can use it once, and is permitted to stay for a period of 90 days. Benefits of 90-Day Non-immigrant visa would be the holder can open a bank account, and he can work in Thailand provided that he will obtain a work permit. This serves as an initial visa for longer term visa such as Marriage Visa, Retirement Visa, or Application for a Work Permit in Thailand.
One year Non-Immigrant Visa
This visa has the same benefit as the 90-Day Non-Immigrant Visa however the One Year Non-Immigrant Visa offers multiple entries to Thailand. The holder is allowed to stay 90 days per entry which means, after the initial 90 days, he needs to go to the nearest border (about 4 hours ride away from Bangkok), get a new entry stamped at the immigration checkpoint, then return back to Bangkok. The holder is eligible to open a bank account, and is eligible to apply for a Work Permit.
If a foreigner is legally married to a Thai national, he is eligible to apply this visa. Requirement includes marriage certificate and meeting the financial requirements. Once granted, the foreigner can stay one year in Thailand.
This type of visa is applicable for foreigners who wish to retire in Thailand, and is more than 50 years old at the time of application. This would grant the applicant 1 year uninterrupted stay in Thailand.
Thai Embassies and Consulates regulate the issuance of visa for foreigners both for short term and long term visit. It is not uncommon to encounter problems that require the help of legal professionals. You can use an established and reputable law firms staffed by competent lawyers who specialize in providing all kinds of Thai visa assistance services to foreigners both in and outside Thailand. They also offer free consultation and detailed information about Thai Visa processes from document preparation to visa issuance. Make sure you will get the Thai visa best suited for you before you come to Thailand.