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The 5 Best Tax Consultants in Bangkok to Keep Your Funds on Track
Moving to the Land of Smiles brings plenty of excitement, but figuring out your local financial obligations can quickly give you a massive headache. Whether you’re running a business or living as an expat, navigating local tax regulations requires expertise.
Finding the best tax consultants in Bangkok makes all the difference when it comes to keeping your money safe and staying compliant. After all, local laws shift all the time, and missing a single deadline can mean heavy fines.
To save you the trouble of guessing your way through the paperwork, we looked closely at the absolute top financial advisors in the city who can keep your funds on track.
| Service Type | Average Cost (THB) |
| Hourly Advisory Consultation | ฿3,000-฿7,000 |
| Individual or Expat Tax Return | ฿1,500-฿27,000 |
| Corporate Annual Retainer | ฿18,000-฿25,000 |
| Monthly Business Accounting | ฿4,000-฿27,500+ |
How much does employing a tax consultant cost in Bangkok?
Hiring a tax consultant in Bangkok starts at ฿3,000 to ฿27,500+, depending on whether you need a quick personal filing or comprehensive monthly corporate tracking.
1. American International Tax Advisers

Website: http://aitaxadvisers.com/
Address: Two Pacific Place, 21st Floor, Unit 2107, 142 Sukhumvit Road, Klongtoey
Contact: (66) 94 681 9734 | [email protected]
Hours: Monday-Friday 8:30 AM to 5:00 PM
If you’re an expatriate dealing with financial interests across multiple borders, American International Tax Advisers offers an incredible safety net. What’s more, they hold deep dual expertise in both the United States and Thai financial frameworks.
Their specialized knowledge smooths out complicated cross-border compliance. The team easily manages complex tasks like Foreign Bank Account Reporting (FBAR).
They also handle local Thai Tax Identification Number (ITIN) setup and Double Taxation Treaty rules.
On top of that, they act as an all-in-one financial hub, and they help people handle things like a guide to company registration in Thailand. It’s a massive benefit for business owners navigating two different systems.
On the downside, their heavy focus on complex foreign frameworks means they can feel like a bit too much if you only have a super basic local document to file.
But for people with tangled cross-border files, they’re highly qualified to get you covered.
Customer Reviews
Reliable help for U.S. Expats in Thailand
I am a U.S. citizen currently residing in Thailand on an OA visa. The staff at AIT did an amazing job in filing my taxes in Thailand, and they were able to save me a lot of money as well due to their expert knowledge of Thailand/United States tax requirements. Highly recommend their services if you want things done right the first time.
- T B | Google Review
Supportive and competent tax guidance
AIT have been extrememly competent, professional and supportive during a process whereby they managed to help me get a penalty abated. Thomas and his team have a high level of expertise and experience which is invaluable. They have helped me to save on taxes and provide counsel, to navigate what can be an overwhelming system and process. I highly recommend them.
- Hami Dragon | Google Review
2. Expat Tax Firm

Website: https://expattaxfirm.com/
Address: Level 17, No 25, Alma Link Building, Soi Chidlom, Lumphini, Pathum Wan
Contact: (+66) 093 579 3833 | [email protected]
Hours: Monday-Thursday 9:00 AM-6:00 PM; Friday 9:00 AM-5:00 PM; Sat 10: AM-3:00 PM
Dealing with international filings gets incredibly stressful, which is why Expat Tax Firm makes a huge difference by offering a highly tailored approach.
They focus heavily on custom expat filings to maximize deductions and secure your cross-border assets safely.
We reached out to them last year regarding a complex foreign asset questionnaire. The team handled the interaction with absolute clarity and warmth.
They minimize double taxation exposure while offering clear, upfront package pricing. You can choose directly from distinct service levels like their Pro or Streamlined options. It’s a great way to avoid surprise bills.
That said, you should know that their basic standard package comes with clear caps on your transaction limits. If you’ve got active crypto trading accounts or need extra document forms, you’ll have to jump up to their premium tiers.
Also, their catch-up packages for past missed years require a much larger upfront financial commitment.
Customer Reviews
Personable and focused tax support
I had the pleasure of speaking with Mitchell on two occasions and asked him some pretty challenging tax questions. He provided excellent service – professional, personable, and genuinely focused on my case. I wouldn’t hesitate to recommend him and his firm to anyone. Thank you for your help, Mitchell.
- Eternal Sky | Google Review
Easy and stress-free tax experience
This was the easiest and best tax experience I’ve had by far. Mitch took the time to answer all my questions. He ended up saving me a bunch of money and time! I will get my taxes done by Expat Tax Firm every year from here on out. Thank you so much Mitch!
- Elizabeth Binyon | Google Review
3. PwC Thailand

Website: https://www.pwc.com/th/en/
Address: 15th Floor, Bangkok City Tower, 179/74-80 South Sathorn Road
Contact: +66 (0) 2844 1000
Hours: Monday-Friday 8:00 AM to 5:00 PM
Managing massive corporate payrolls or complex compliance requires a true heavy hitter, and PwC Thailand is a premier choice in the financial arena.
They bring advanced tax technology integration right to the table. This helps organizations embed complex regulatory codes directly into their institutional ERP setups.
Plus, they’ve operated locally for over six decades, using their massive Bangkok-based office to streamline global minimum corporate requirements.
They also provide excellent regional corporate structures. It’s a huge asset for large enterprises needing automated tracking tools.
However, the extreme focus on major multinational firms means they aren’t a great fit for freelancers or individual expats who need basic income filings. Their massive infrastructure’s entirely geared toward heavy corporate strategy.
Even so, if you operate a large company needing corporate advisory or help with specialized accountants, their network scale provides serious muscle.
4. American Asia Tax Company Ltd.

Website: https://www.americanasiatax.com/
Address: CP Tower 3, Level 4 CSO #418, 34 Phayathai Road, Thung Phayathai, Ratchatewee
Contact: +66 8 0204 4696 (English) | +66 8 1817 9815 (Thai) | [email protected]
Hours: Monday-Friday 10:00 AM-5:00 PM
American Asia Tax Company Ltd. provides fantastic, streamlined tax catch-up support to help people safely get back into good standing with international authorities.
They house a certified acceptance agent who signs off directly on your official identification paperwork.
Moreover, you don’t have to mail your actual passport away to foreign bureaus. They also analyze state-level liabilities to keep you from paying unnecessary regional fees back home while managing foreign account tracking beautifully.
A colleague of mine used them to sort through three years of unfiled documentation. The smooth process saved them massive stress.
However, because they focus entirely on individuals holding American ties, expats from other nations’ll find their specialized services useless for regular regional compliance.
Customer Reviews
Exceptional service from American Asia tax
I am very impressed with the exceptionally high level of service, knowledge, experience and professionalism of the team at American Asia Tax Company. In particular, Khun James is very responsive and extremely helpful to assist me to ensure I’m getting back to being tax compliant. I am strongly recommend American Asia Tax and wish there is more than 5 stars for me to rate them.
- Vana Bulbon | Google Review
Trusted U.S. Tax support in Thailand
As a new ex-pat working in Thailand (2019), James helped me filing my tax in the USA. The forms are confusing, and James has the knowledge to file the correct IRS forms, correctly, the 1st time. I could not be happier with James’ service and advice. James just completed my 2nd tax filing (for 2020), and I consider James (at American Asia Tax Co) to be my “tax guy”.
- Don Soutar | Google Review
5. Siam International Accounting Management Ltd.

Website: https://www.siamtaxtreaties.com/
Address: CP Tower 3, Level 4 CSO #418, 34 Phayathai Road, Thung Phayathai, Ratchatewee
Contact: 02 391 3906 (+66 2391 3906 International)
Hours: Monday-Thursday 9:00 AM-5:00 PM; Friday 9:00 AM-4:00 PM
Finding a team that truly knows the ins and outs of local state departments can save you weeks of circular phone calls. That’s what made Siam International Accounting Management Ltd. a valuable partner.
They operate as hyper-focused taxation specialists who exclusively tackle international agreements. They’ve carved out a highly successful path for recovering income funds specifically for international school teachers through local double taxation treaties.
Plus, their senior management brings over a decade of hands-on experience working within the local revenue department. This background allows them to bypass administrative gridlocks cleanly.
Once your fund recovery goes through, they can even route the cash directly to your overseas bank accounts. It’s an incredibly smooth process for busy educators.
That said, their specific specialization means they don’t handle general corporate accounting or daily work permits. Additionally, their final fees’ll depend heavily on your specific school documents and employment dates.
Customer Reviews
Trustworthy tax refund support in Bangkok
After hearing about being able to claim back tax after working in Bangkok for 2 years, I contacted Stephen through a recommendation from someone who had already used his services. Extremely professional and trustworthy service throughout with timely communication. Would thoroughly recommend!
- Jeanna Fergusson | Google Review
Prompt support for Thailand tax refunds
Stephen and his team were able to deliver, as promised, the refund of taxes from two years working in Thailand, both at a private language school and a bilingual international school which shows it’s not only the more well-known schools where refunds can be successful. They were in touch throughout and always prompt in replying to any queries I had. Thanks again to Stephen and team.
- Alicia Green | Google Review