Exclusive IR Global advisor for Accounting Services in Thailand since 2023

Orapan Jumpa

+662 636 3464


“As a delicate and detail-oriented accounting professional, I have been meeting the accounting needs of corporations and individuals. I am currently working as the Team Manager at Optimum Accounting Services Co.,Ltd who is the Accounting and Tax Service Provider in Thailand.

For more than 15 years working experience with local and international client in Accounting and Tax which I serve as an accountant and consultant, in this position allowed me to easily navigate the international financial and tax, also give the advice to clients for their term goals.”

Read more

About Optimum Accounting Services Co., Ltd

Optimum Accounting Services Co., Ltd

Introducing Optimum Accounting Services

At Optimum, we’re here to provide hassle-free tax and accounting services to ensure your business complies with all Thai tax laws. We understand that operating a business in Thailand can be confusing, that’s why we pride ourselves on delivering all the services you need to adhere to Thai law, including taxation, accounting, bookkeeping, payroll, billing and consultancy.

OPTIMUM is a leading Thai accountancy firm with strong local connections and an international business outlook. Our licensed Certified Public Accountants possess wide-ranging skills and knowledge and have over 15 years’ experience advising domestic and foreign clients, corporations and investors.

We have considerable experience working with international groups and foreign-listed companies as well as SMEs and start-ups and are regularly called upon to provide tax consultancy and financial advice to private clients and high-net-worth individuals.

The firm works to international accounting standards and internationally-accepted codes of business conduct and practice. We routinely advise as part of multi-national accounting and finance teams, and our jurisdiction experience covers Singapore, Thailand and the US.

Our services include, inter alia, preparing and advising on financial consolidation and management reports, group companies reporting packages, International Financial Reporting Standards (IFRS), and compliance with local Generally Accepted Accounting Principles (GAAPs).

Our aim is to provide clear, cost-effective and reliable tax and accounting advice that meets clients’ business and commercial needs and their tax and accounting obligations. We advise on all types of corporate entities, including branch and representative offices, joint ventures, sole proprietorships, etc. Recent clients have worked in the following principal industry sectors: advertising & media, hospitality & leisure, manufacturing, real estate, retail & wholesale, and software & technology.

Our experience and expertise have earned us notable recognition and awards, including the Good Governance Award and the prestigious award for Excellence in Accounting Development. And we were obtained in the accredited accounting firm list of Department of Business Development since 2010.

Since 2007, Optimum has provided services for a wealth of customers from various industries.

Our services are certified and recognised by the Federation of Accounting Professions of Thailand and the Department of Business Development, Ministry of Commerce.

Optimum Accounting Services

Optimum’s clients come from a wide range of industries, with many leading companies choosing Optimum for their highly regarded and professional services.

An example of just some of the industries in which Optimum’s clients work within include:

TV and film production, online shopping, online payment platforms, food and beverage outlets, trading,  creative design studios, construction, manufacturing, and engineering, Chemical and many more.

The optimum team works with the client as one team. We guarantee our quality of work with high responsibility, sincerity, transparency and open discussion. Optimum conveys the message to our clients that “Client Success is Our Reward”.  Our mission is to grow up with the client, being a colleague and support each other as a business partner.

From this philosophy, Optimum received the Good Governance Award in 2013 and has recently been awarded the same award in 2014. It is a testament to the ongoing hard work of the whole team at Optimum, who are passionately driven to continue this success for many years to come.

Our Services

Thai tax and accounting laws can sometimes be difficult to understand, particularly if you are not familiar with the Thai language. At Optimum, we provide clear and transparent services for all your tax and accounting needs in a way that not only takes care of your business requirements but also provides professional advice and information on how to complete all tax and accounting obligations.

Our tax and accounting services ensure in timely committed deadline with professional and international quality.  


Tax advisory

Tax planning personal & corporate

Facilitating in tax return investigation by a government

Filing monthly and annually tax report as required by Thai Tax Law


Bookkeeping records

Review & verify automatic transaction bookkeeping

Reconciliation statement

Management Report

Financial Statement and Report

Group company package report

GAAPs reconciliation

Accounting adjustment

Financial Statement translation

Review and Verify Financial Statement


Thai Labor Law compliance

Filing monthly & annually Social Security Fund Report

Calculating for staff monthly withholding tax

Preparing and issuing payroll payslip in accordance with local requirement

Preparation payroll batch payment

We commit to high-security confidential information in the payroll function.

Administrative Service:

Billing & Collection

Payment and invoice monitoring report

Bank balance update

Other secretary and administrative service as required


If you’re looking for a consultation about tax and accounting in Thailand, our team member is qualified professionals who have past experiences in the international advisory service firms and are members of Federation of Accounting Profession in Thailand, whereas, hold degrees from well-accredited universities, both in Thailand and Overseas. You could ensure its international standard quality with a strong background in local tax and regulation.

At Optimum, we stand by our motto:

International Quality with Reasonable Local Fee

If you’re searching for a consultation about tax and accounting in Thailand, we’re here to provide all the advice and information that you need to fully understand Thai laws and practices. Our team of fully qualified Thai accountants take pride in their ability to help companies comply with Thai tax requirements.


Read more

Exclusive IR Global advisor for Accounting Services in Thailand

990 Abdulrahim Place 22nd Floor Suite 2210A Rama IV Road Silom Bangrak Bangkok 10500