Work Permit Amendment (TT.9) — Change Position, Employer, Workplace
WP holders must file TT.9 within 15 days of a change to: (1) position, (2) employer (previous WP must be cancelled and a new one issued), (3) primary workplace, (4) additional workplaces, (5) salary, or (6) job type. Non-notification carries up to THB 100,000 fine (RA on Foreign Employment B.E. 2560, s.70). State fee THB 1,000/item; service THB 6,000; 5–7 business days.
- From
- THB 6,000
- Turnaround
- 5–7 business days
- Coverage
- 12+
Quick answer
WP holders must file TT.9 within 15 days of a change to: (1) position, (2) employer (previous WP must be cancelled and a new one issued), (3) primary workplace, (4) additional workplaces, (5) salary, or (6) job type. Non-notification carries up to THB 100,000 fine (RA on Foreign Employment B.E. 2560, s.70). State fee THB 1,000/item; service THB 6,000; 5–7 business days.
Our workflow is aligned with the Department of Consular Affairs, Ministry of Foreign Affairs (MFA Chaeng Watthana) and the published requirements of each destination embassy or consulate. We track changes weekly directly from the originating authorities so the steps you see here reflect what actually clears today — not what was published years ago.
Why this matters
Our Work Permit Amendment (TT.9) — Change Position, Employer, Workplace desk handles one of the highest request volumes in the firm — currently spanning 12 primary categories, each with its own evidentiary checklist, certification chain, and turnaround. Choosing the correct pathway on day one saves an average of 7–14 calendar days versus a misrouted submission that has to be restarted.
Because work permit amendment (tt.9) — change position, employer, workplace sits at the intersection of Thai administrative law and the destination authority's evidentiary rules, the cost of a misstep is rarely the filing fee — it is the lost window. A visa interview that has to be rescheduled, a contract closing that slips a quarter, or a property transfer that misses the next tax cycle dwarfs any savings from a cut-rate translator. Our pricing reflects that reality: we'd rather quote the real number once and deliver it cleanly than chase a missed deadline.
How we deliver it
Our standard workflow has five gates: (1) source-document assessment and pathway recommendation within one business hour; (2) preparation and certified translation by registered translators; (3) notarisation by a licensed Notarial Services Attorney; (4) MFA Chaeng Watthana submission with daily tracking; (5) destination embassy or consulate endorsement, with the final dossier hand-delivered or shipped back to you under signature.
- Intake & free document review (≤1 business hour).
- Certified translation by registered translators with seal + licence number.
- Notarisation by a Notarial Services Attorney (Lawyers' Council of Thailand).
- MFA Chaeng Watthana endorsement (Department of Consular Affairs).
- Destination embassy / consulate finalisation + return delivery.
Document readiness before filing
Work Permit Amendment (TT.9) — Change Position, Employer, Workplace matters most when the filing window is narrow and the receiving authority applies its checklist strictly. Before any document is translated or notarised, we verify whether the source record is still within the destination authority's freshness rule, whether the name format matches the passport or company registry, whether supporting annexes must travel with the main document, and whether wet-ink originals are mandatory. This pre-flight stage is where most avoidable delays are prevented.
For many matters, document readiness is not just about collecting papers. It includes sequencing. Some authorities want the translation attached before notarisation; others insist that the source record be legalised first and translated later for local use. Universities, embassies, banks, BOI desks, and immigration offices often appear to ask for "the same thing" while enforcing materially different standards. We map that sequence up front so the file is prepared in the order most likely to be accepted on first submission.
Common pitfalls we prevent
The most common cause of rejection for first-time clients is using a source certificate that fails the destination authority's freshness rule (Thai household registrations older than six months, for example), translations missing the translator's licence number, or chain-of-certification steps performed in the wrong order. We screen for all three before any fees are incurred.
- Stale source records (e.g. household registrations older than 6 months).
- Translations missing the translator's licence number or seal.
- Chain-of-certification steps performed out of order.
- Names transliterated inconsistently across passport, ID, and certificate.
Transparent pricing & turnaround
All fees appear in a single transparent quote that bundles government charges, courier (EMS/Kerry), and attorney work — no hidden surcharges. Standard turnaround is 5–10 business days end-to-end; an expedited 1–3 business day track is available for time-critical filings.
Authoritative references: MFA Department of Consular Affairs (consular.mfa.go.th), Hague Conference on Private International Law (hcch.net), Lawyers' Council of Thailand (lawyerscouncil.or.th).
Quality control, evidence & accountability
Every work permit amendment (tt.9) — change position, employer, workplace file we handle moves through a named-responsibility chain. The translator or document preparer completes the first pass, a second reviewer checks critical fields such as names, dates, authority names, seals, and destination-specific language, and an attorney or senior case manager verifies the certification pathway before submission. That governance layer is what turns a service page from marketing copy into an auditable promise: there is a real workflow behind the claim.
This is also central to E-E-A-T. Search engines and AI answer systems increasingly prefer sites that can demonstrate authorship, review, accountability, and alignment between on-page claims and business reality. By documenting reviewers, update dates, process steps, related authority references, and connected service pages, we help both users and machines understand that the information is maintained by practitioners who deal with these filings in the real world.
Frequently asked questions
Standard cases close in 5–10 business days including MFA and embassy steps. Expedited track is 1–3 business days for an additional fee.
Original or government-issued copies of the Thai source records, plus a copy of the document owner's national ID or passport. We review your bundle for free before any work begins.
In most cases, no — a signed power of attorney is sufficient. A small number of destination embassies (some visa categories) do require the document owner's physical presence; we flag those during intake.
Yes. Quotes are turn-key and include every government and courier fee. Request one via LINE @NYCLI or +66 83-249-4999 — typical reply time is under one hour during business days.
Yes. We cover all 77 Thai provinces with door-to-door courier pickup and delivery, fully tracked end-to-end.
168 destinations including the 125 Hague Apostille jurisdictions and Non-Hague destinations that require in-Thailand embassy endorsement. See the Legalization hub for the full directory.
Reviewed by: Atty. Pakin (Senior Partner — NYC Legal & Notary Services Co., Ltd.) · Last reviewed: 2026-07-22
Frequently asked questions
Do I need to cancel the old WP when changing employer?
Yes — Thai law has no direct transfer. The former employer files WP.13 (cancellation) within 15 days, then the new employer files a new TT.3. The Non-B must still be valid.
Could the Non-B visa lapse during the employer switch?
Possibly — the Non-B is auto-cancelled 30 days after WP cancellation. Secure the new WP.3 and extend Non-B at Immigration before the 30-day window. Plan 2 months ahead.
Can I hold two concurrent WPs?
Yes — one WP per employer (Multiple WP). Each employer must independently meet the THB 2M capital and 4:1 staff ratio (BOI exempt).
How do I add a branch workplace?
File TT.9 with branch address + commercial branch registration + lease/tabien baan. Once approved, the WP will list both HQ and branch.
Does promotion from Manager to Director affect BOI?
Possibly — BOI certificates cap positions per level (Executive/Manager/Skilled). Amend the BOI Position List at OSSC before filing TT.9.
Must a salary increase be filed immediately?
Yes — within 15 days so PND.1 and SSO align. DOE cross-checks at renewal; mismatches can block approval.
How do I change the registered company address?
Two filings: (1) DBD notice of company-address change; (2) DOE TT.9 with the updated DBD certificate, new lease, Google Map, and photos.
How are TT.9 fees calculated?
THB 1,000 per amendment item. Three simultaneous changes (position + salary + workplace) = THB 3,000.
Ready to start?
Free quotation within 1 business hour via LINE @NYCLI or +66 83-249-4999
Contact our team





