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.

Learn More →

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.

Learn More →

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.

FAQ FOR THAI TAX 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

“Wonderful professional service. Staffs are always knowledgable, provide clear advice and very quick to response. We don’t have to mention the good looking, do we?”

Really, Thank you for the best service we can ask for”

Envix Asia Co.,Ltd.

“ We would like to express our sincere appreciation for your good service to us since the first day we engaged Optimum Accounting Services as our consultant. You have provided consistent and reliable support throughout the engagement. We are very impressed with your professionalism and look forward to continuing this professional relationship in future ”

Valiant Equipment (Thailand)

“Reliable business partner for 10 years. Friendly and supportive.
Also we appreciate your flexibility with patience to the global finance team of our company”

Miki Solutions Limited (Miki Travel Group)

When we started ALKA Link Co., Ltd., a successful Thai business man gave us the following advice.

“If you want to be successful in Thailand you have to have three things:

1. A good accounting company

2. A good network AND

3. A good accounting company.”

We chose OPTIMUM and we have been successful ever since.

Alaka Link Co., LTD.

We have always had a very good support from your team for all our queries since we are working together.

Mickey Massey

Deputy Finance Coordinator

Doctor Without Border – Organization Thailand

It gives me great pleasure in writing this letter of appreciation to thank you and your team for your many years of commendable and best possible service to support our accounting, tax and payroll requirements including diligently complying to our Group’s periodical tight reporting schedule.

You have demonstrated a high level of commitment and professionalism and we truly appreciate.

Thank you for the job well done. We hope that your Company will continue to perform in many more years to come.

Thank you once again.

TRUWATER (THAILAND) CO., LTD