Tax and accounting services
for your business in Thailand.
Tax and accounting services for your business in Thailand.
At Optimum, we’re here to provide hassle-free tax and accounting services.
Services
Thai tax and accounting laws can sometimes be difficult to understand, particularly if you are not familiar with Thai language. At Optimum, we provide clear and transparent services for all your tax and accounting needs.
Taxation
In accordance with Thai law, all businesses must pay income…
Accounting
A qualified Thai accountant must complete all accounts in…
Bookkeeping
Optimum’s bookkeeping service is designed to help you and…
Payroll
Optimum handles every aspect of your payroll process whilst…
Billing
According to Thai law, certain documents need to be…
Consultancy
At Optimum, we stand by our motto, ‘We work for you and…
Taxation
In accordance with Thai law, all businesses must pay income…
Accounting
A qualified Thai accountant must complete all accounts in…
Bookkeeping
Optimum’s bookkeeping service is designed to help you and…
Payroll
Optimum handles every aspect of your payroll process whilst…
Billing
According to Thai law, certain documents need to be…
Consultancy
At Optimum, we stand by our motto, ‘We work for you and…
About Us
When you choose Optimum, we’ll help you understand all of the requirements for personal income tax, corporate income tax, VAT and accounting according to Thai law with our team of qualified English speaking accountants.


Insights
Advice and information on how Thai tax laws work
If you’re feeling confused and overwhelmed by Thai tax laws, don’t worry! We’re here to provide tax and accounting services to ensure that you never have to worry about missing deadlines or failing to provide the correct information again. This page offers some basic advice and information on how Thai tax laws work, who is required to pay income tax, how income tax reports are completed, as well as the consequences for not adhering to these laws.
Thai accounting law – what are the rules?
Understanding how Thai accounting laws work is vital to running a smooth and successful business. Here we provide a brief introduction into the proper practices that must be adhered to by all companies in Thailand.
All companies in Thailand must prepare and keep accounts drafted according to the Thai Accounting Standards, formulated by the Thai Federation of Accounting Professions (FAP) and the Institute of Certified Accountants and Auditors of Thailand (CAAT). Accounting services in Thailand adhere to these accounting standards, which includes that a qualified Thai accountant must handle accounts.
Key timelines to be aware of:
- For newly established companies or partnerships, accounts should be closed within 12 months from the date of its registration. Thereafter, the accounts should be closed every 12 months.
- The performance record is to be filed with the Business Development Office, Ministry of Commerce, within five months of the end of the fiscal year, and with the Revenue Department, Ministry of Finance, within 150 days of the end of the fiscal year.
Companies in Thailand must provide:
- Annual financial statement submission to the Thai government
- Record accounting transactions
- Supporting schedules for financial statements
Testimonial
Thai tax and accounting laws can sometimes be difficult to understand, particularly if you are not familiar with Thai language. At Optimum, we provide clear and transparent services for all your tax and accounting needs.
Our Experience

25+
Payroll Service

165+
Accounting & Reporting

17+
Administrative Service

135+
Tax Advisory Service

15+
Consulting Service
Client Business Segment


International Proficiency Service
with Local Price
For any questions, queries or advice about our tax
and accounting services,
please do not hesitate to contact us.

Optimum Accounting Services Co., Ltd.

Phone: +662 636 3464

Fax: +662 636 3466

info@optimumacc.com
© 2020 Optimum Accounting Services Co., Ltd. All rights reserved.