Bangkok’s Immigration offices handle more foreigners per day than most provincial branches see in a month. Chaeng Watthana (headquarters) and IT Square Lak Si (popular extension counter) have different queues, dress expectations, and trip lengths. This guide is practical counter strategy — not a substitute for form rules.
Which office for which task
| Task | Typical Bangkok location |
|---|---|
| 90-day report (TM.47) | Chaeng Watthana (online preferred when eligible) |
| Tourist extension (TM.7) | IT Square Lak Si or Chaeng Watthana — confirm current routing |
| Non-Immigrant extension / conversion | Chaeng Watthana |
| Re-entry permit | Chaeng Watthana |
| First-time e-Service registration | Chaeng Watthana |
Task cross-links: Extension · 90-day report · Re-entry permit guide
Chaeng Watthana (Government Complex)
Address area: Chaeng Watthana Road, Lak Si — large government campus, multiple buildings.
- 1
Arrive before opening on weekday
Queues form by 08:00. Monday after long holidays is the worst day. Mid-week Tuesdays and Wednesdays are slightly lighter.
- 2
Identify the correct building and queue ticket
Follow signage for your service — extensions, 90-day reporting, and re-entry are different counters. Take the wrong ticket and you lose hours.
- 3
Dress respectfully
Covered shoulders and knees reduce friction at security. Flip-flops and beach wear get turned away at inner rooms.
- 4
Bring originals and copies
Copy shops line the approach road. Passport biodata, latest stamp, TM.30, prior TM.47 — organise before you enter.
- 5
Expect biometrics and photos
Central office captures photos and fingerprints for many services. Remove hats and sunglasses.
- 6
Verify stamps before leaving
Check expiry dates at the counter. Errors caught in the parking lot are fixable; errors caught at the airport are not.
Transport: Taxi or Grab from Mo Chit BTS (~20–40 min traffic-dependent). No convenient MRT walk. Budget half a day minimum.
IT Square Lak Si
Shopping-mall counter popular for tourist extensions and some routine services. Smaller footprint than Chaeng Watthana — queues still long at peak.
IT Square day bag
- Passport original
- TM.7 completed with photo
- 1,900 THB cash for tourist extension (confirm current fee)
- TM.30 receipt if asked (landlord issues)
- Water and patience — mall food court for breaks
- Phone on silent — inner rooms restrict calls
Transport: Near Lak Si area — taxi from Mo Chit or Don Mueang airport corridor. Combine with Chaeng Watthana only if you enjoy suffering; do not stack both same morning.
Universal tips
Warning
Never use unofficial “fixers” at the gate promising queue skips. Official officers only.
- Holiday calendar: Royal birthdays and Songkran close national immigration. Do not schedule extension on your stamp’s last valid day before a holiday.
- Address consistency: TM.7, TM.47, and TM.30 must tell the same story.
- Late 90-day: Pay the guideline fine and file — see late penalty guide.
- Language: Basic Thai greetings help; forms are Thai/English mix. Bring a Thai-speaking friend for complex cases.
Frequently asked questions
Can I use Grab to either office?
Yes — set the official building name in Thai if the driver looks confused.
Which office is faster?
Depends on service type and day. Tourist TM.7 at IT Square can beat Chaeng Watthana for simple cases; complex conversions belong at HQ.
Do I need an appointment?
Some services moved to online booking post-COVID. Check Immigration social channels and the website — walk-in may still work for TM.47 and TM.7.
Is there air conditioning?
Outdoor queues are hot. Indoor waiting is air-conditioned — dress in layers.
