How to extend your visa legally in Thailand?

Person preparing documents to extend visa Thailand at immigration office

Why is it essential to understand the rules for extending your visa in Thailand? 

Every year, Thailand welcomes millions of foreigners for various reasons: tourism, retirement, study, and family life. However, not everyone wants to leave Thailand when their visa expires. That is why the procedure for extending a visa in Thailand plays a central role in remaining in the country legally.

Thai law is strict when it comes to migration. The main basis for this is the Immigration Act B.E. 2522 (1979), particularly Articles 35 to 38. All foreigners must comply with these laws, and violations may result in penalties, including fines, detention, or even deportation. As a result, the issue of visa extended in Thailand becomes a matter of legal certainty for all foreigners.

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Which authority processes visa extension applications for Thailand? 

The competent authority for visa extensions in Thailand is the Royal Thai Police Immigration Bureau. Each application is processed by the local immigration office based on the person’s declared place of residence. They are responsible for receiving the documents and deciding on the final outcome of the approval or refusal, but also monitor the progress of the stay and the fulfillment of the extended reporting obligation.

What is the legal framework governing visa extended in Thailand? 

The legal basis is clear. Section 35 of the Immigration Act allows immigration officers to extend the stay of a foreigner if they meet the conditions set out in the regulations. Section 37 requires compliance with obligations, including notification of the place of residence every 90 days. 

In addition, there are other documents: ministerial notifications, administrative orders, and circulars issued by the Immigration Bureau. These documents specify the visa categories concerned and the documents to be provided in order to extend a visa in Thailand.

Visa extended in Thailand according to different types of visas

Is it possible to extend a tourist visa in Thailand?

Yes, under Article 35 of the Immigration Act. Holders of a tourist visa (TR) can apply for a Thailand visa extend for an additional month. To do so, you must:

  • Go to an immigration office before your visa expires;
  • Fill out form TM.7;
  • Provide a 4×6 cm photo and your passport;
  • Pay the fee of 1,900 THB.

However, this is at the discretion of the officer, and justification may be required from time to time (illness, change of plans, or other reasons). 

Can a Non-Immigrant B visa be extended in Thailand? 

Yes, provided that the professional requirements set by the immigration authorities are met. A type B visa extension in Thailand is granted to foreigners who hold a valid work permit and are employed by a company registered in Thailand.

The supporting documents to be provided include:

  • Employment contract;
  • Copy of work permit;
  • Status of the employing company;
  • Financial statement or certificate of registration.

Companies must also prove that they have sufficient capital (often THB 2 million) and employ a certain number of Thai nationals. If this criterion is not met, the extension may be refused.

How to obtain a retirement visa extension in Thailand? 

Non-Immigrant O or OA visas for retirees can be extended for one year under certain conditions. The extension is based on financial criteria:

  • Deposit of THB 800,000 in a Thai bank account for at least two months; or
  • Proven monthly income of at least THB 65,000.

A medical certificate may also be required. Recently, health insurance has also become mandatory for OA visas. Any visa extension in Thailand of this type must be considered in advance to avoid rejection due to insufficient deposit or missing documents.

Can a DTV visa be extended in Thailand?

The DTV (Destination Thailand Visa), introduced to attract remote workers, offers significant flexibility for foreign nationals engaged in international professional activities. This visa is valid for five years and allows multiple entries, each granting a stay of up to 180 days, renewable indefinitely provided all legal conditions are met.

However, for each 180-day stay, visa holders must apply for an extension if they wish to remain in Thailand beyond that period without leaving the country. This Thailand visa extension is subject to a strict administrative process: the applicant must report to a local immigration office before the end of the authorized stay, with all required documents.

Immigration authorities notably require:

  • Updated proof of income, demonstrating a continuing remote activity generating at least THB 80,000 per monthor THB 1,000,000 per year;
  • Valid health insurance covering the entire extended stay;
  • An explanatory letter detailing the nature of the applicant’s professional activity, along with supporting documents issued by the foreign employer or tax statements from another jurisdiction, if applicable.

Extension requests may be subject to enhanced scrutiny if there is any doubt about the legitimate use of the visa. Thai immigration officers may request additional documentation, particularly to verify that no unauthorized activities are being carried out within the country (such as local employment or providing services to Thai clients).

Seeking support from an immigration lawyer is strongly recommended to ensure full compliance with Thai regulations. Given the wide discretionary power of immigration officers, legal guidance helps secure your long-term stay and avoid the risk of visa rejection or cancellation.

Does the LTR Thailand visa need to be renewed?

There is no need to renew the long-term Thailand visa (LTR), as it has no fixed expiration date within its 5-year validity. However, it may be revoked under certain circumstances. You must ensure that a re-entry permit is arranged each time you plan to leave and re-enter Thailand.

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Is an extension possible for students?

Yes, holders of an ED visa are eligible for a visa extend in Thailand provided they are enrolled in an institution accredited by the Ministry of Education.

The institution must then issue a certificate specifying:

  • the purpose of the training;
  • the expected duration;
  • the course schedule;
  • the student’s active status.

Proof of attendance may be verified, and failure to provide such proof may result in the applicant’s request being denied. The extension is granted every 90 days as long as the student’s course of study continues.

What about family situations? 

Foreign spouses of Thai citizens are also eligible for a visa extension in Thailand on the basis of family life. The following is required:

  • Marriage certificate recognized in Thailand;
  • Copy of the Thai spouse’s identity card;
  • Proof of common residence;
  • Proof of stable income (at least THB 40,000 per month).

This application is governed by Order 327/2557, provided for in Article 2.18. This extension is valid for one year and may be renewed if the conditions are still met.

What general documents are required for a visa extension in Thailand ? 

Regardless of the type of visa, all applications for a visa extension in Thailand must include:

  • Form TM.7, completed and signed;
  • Original valid passport;
  • Copies of the visa, entry stamp, and TM.6 card;
  • Recent passport photo;
  • Payment of fees (1,900 THB);
  • Specific supporting documents depending on the type of visa.

All these documents must be up to date and presented in paper form and sometimes as digital copies. 

What are the risks of overstaying your visa? 

Article 81 of the Immigration Act provides for a fine of 500 THB per day of overstay, up to a maximum of 20,000 THB. Thus, overstaying by more than 90 days may result in a ban on entry into the country for a period of 1 to 10 years.

A visa extension in Thailand requested after the visa has expired cannot be accepted. The national will then be considered to be in an irregular situation.

What behavior can lead to a refusal? 

Even if the application is complete, immigration may refuse to extend a visa in Thailand in the following cases:

  • Forged documents;
  • Undeclared employment;
  • Lack of financial means;
  • Doubts about the validity of the reasons given.

The immigration authorities therefore have broad discretionary powers. In the event of refusal, the person concerned is required to leave the country immediately or face penalties.

Can a refusal to extend a visa be contested in Thailand? 

In the event of a refusal, it is still possible to request a review of the decision from the office that issued the refusal, but the options for appeal are limited.

However, in the event of an unjustified refusal, it is recommended that you seek the assistance of a specialized lawyer to file a complaint or submit a new application. 

Is it useful to seek legal assistance for a visa extension in Thailand?

It is strongly recommended to hire a lawyer, as they can:

  • Ensure that the application is complete and accurate;
  • Prepare convincing documents;
  • Represent the client before immigration authorities;
  • Intervene quickly in the event of a dispute.

Legal assistance is particularly useful for complex applications, such as those involving companies, families, retirement, or previous situations that may pose a risk.

Conclusion

Extending a visa in Thailand is indeed a complicated procedure governed by a strict legal framework and, above all, dominated by the Immigration Act B.E. 2522.

The conditions for extension vary depending on the type of visa, so it is important to plan the process carefully. In conclusion, extending a visa in Thailand is a step that should never be taken lightly. The slightest oversight could jeopardize your personal or professional plans. To avoid errors in documentation, language mistakes, and even refusals, it is essential to meet deadlines and follow the procedure without any hiccups or failures. The assistance of a competent law firm such as Benoit & Partners is invaluable in this regard.