Business Visa Extensions in Thailand
Plan stay extensions in Thailand for business-related cases: identify the current permission, confirm the office checklist, prepare employer evidence and separate work, re-entry and reporting tasks.

Visa extensions in Thailand: business stay and separate work deadlines
Check the latest permission-to-stay deadline and the current basis before applying. Use the responsible office’s checklist, prepare employer evidence early and follow any under-consideration instruction exactly. Stay extension, work permission, re-entry and 90-day reporting are separate processes.
Find what you need
Use a section below to plan your next step.
Start with the permission to stay you actually hold
An in-country “visa extension” generally means applying to Immigration to extend your permission to stay. It is different from applying for a new visa abroad or renewing work permission. Read the latest entry, extension and any under-consideration record before planning the next step.
Record nationality, passport, entry category, sponsor or employer, current basis of stay and the final permitted day. A visa’s expiry date, a 90-day report receipt and a work-permit expiry can all show different dates. None should be substituted for the actual stay deadline.
Confirm the correct basis and responsible office
Business necessity, BOI-supported employment, a branch or representative office, family and other categories can involve different evidence and procedures. Confirm the basis you qualify for now, the responsible Immigration office and any specialist service route.
Ask about the current application window, appointment or online steps, attendance, copies, signatures, address evidence and collection or return visit. A local checklist is useful for that office; it should not be treated as an unchanged nationwide rule.
If the employer is new, has changed structure or cannot produce a document, raise that early. Do not assume a generic capital, salary or Thai-staff ratio applies identically to every category or promoted project.
Prepare the applicant’s identity and stay file
Use the office’s current TM.7 and checklist. Common evidence categories include the original passport, required copies of identity and permission records, photograph, address and accommodation reporting, and evidence connecting you to the stated basis of stay.
Check every date and signature, and explain a replacement passport or changed name before submission. Keep private copies of the actual application and supporting records. Do not sign blank forms or use an address unrelated to where you stay to make a file easier to process.
Collect employer evidence while there is time to fix gaps
Business-based applications can require an employment certification, work-permission evidence, current company and shareholder records, financial statements and tax filings, payroll and social-security records, business licences, office details, maps or photographs. The exact list depends on the office and category.
Ask the employer and accountant to reconcile names, job, salary, headcount, address and filing periods across the evidence. A filed return and its payment receipt are different records. Identify which documents must be current, certified or signed by a particular person.
For branches, representative offices or special promotion routes, confirm any different financial, remittance, authority or supporting approval evidence. Do not substitute a private company’s pack simply because it was accepted for a colleague last year.
Budget for the official fee and separate assistance
BOI’s official guidance gives the TM.7 extension application fee as 1,900 baht. Confirm the fee and accepted payment for the actual application and retain the official receipt. Photos, copies, translations, travel and an agent’s service charge are separate costs.
Ask a provider to specify preparation, submission, attendance, responses and passport handling. Approval remains the authority’s decision. A higher service fee, an employer’s promise or an application appointment does not guarantee a particular period of stay.
Submit before the deadline and follow the written process
Check the complete file early enough to correct a missing item within the current permission. A queue ticket, courier receipt or agent-held passport does not itself extend the stay. If the application cannot be accepted, obtain the exact instruction and lawful options immediately.
Attend the required identity, interview or submission steps and retain the receipt and any written instructions. Record the date, office and reference. Monitor requests rather than assuming the employer or agent will notice every message.
Read an under-consideration record carefully
If Immigration gives an under-consideration stamp or return instruction, check the actual permitted date and required follow-up. Ask what you must do, when and where, and how travel or a change in employment affects the pending case. Do not treat it as a final annual extension.
Before leaving the office, check identity details and the dates recorded. Keep a clear copy and reminders. If the instruction appears wrong or unclear, ask promptly while staff can review the file rather than making your own calculation.
Renew work permission as a separate task
Coordinate the stay application with the employer and Department of Employment process, including any specialised promotion route. The visa, stay and work permission can have separate validity and evidence. A stay extension does not automatically renew the right to perform duties.
Before changing employer, role, workplace or ending employment, confirm amendments, cancellation and the effect on the stay basis. Do not assume the printed expiry remains usable after the supporting employment has ended. Agree who will complete each step and retain the outcome.
Re-entry and reporting do not add stay days
Before overseas travel, ask whether re-entry permission is needed to preserve the current stay and how it interacts with any pending application. Returning later does not automatically create a new full extension period. Check the actual entry record on return.
Ordinary 90-day residence notification is not a stay extension. Address reporting, accommodation reporting and extension duties are distinct, and specialised programmes such as LTR can have different reporting arrangements. Use the process for the permission you actually hold.
Check the final decision and plan the next cycle
Read the granted permission, conditions and expiry, and save the official record. Update employer, work and travel calendars and any dependant cases that need separate action. A requested period is not the same as the period granted.
If refused or unable to qualify, obtain advice on the written departure or other instruction. Do not assume every refusal gives the same grace period or that a pending appeal permits continued stay or work. Maintain a lawful alternative and act before the applicable deadline.
Before the extension visit
Common questions
Am I extending the visa’s validity?
Usually the in-country application concerns permission to stay. Visa validity and the period of stay granted by Immigration are different.
Does a pending application always grant extra days?
Do not assume so. Follow the actual accepted application and written stamp or instruction. An appointment or agent receipt alone is not permission.
Is 90-day reporting enough to stay longer?
No. Residence notification does not extend permission to stay.
Does an extension renew the work permit?
No. Coordinate the separate labour process and verify the issued work permission.
Useful next steps
Business visa guide
Review the original visa and work route.
Learn moreVisa requirements
Prepare category-specific evidence.
Learn moreLong-stay visas
Compare other routes where appropriate.
Learn moreTourist stay extension
Use visitor-specific guidance for a tourism entry.
Learn moreSources used for this guide
Sources are reviewed regularly so important changes can be reflected in the guide.
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