About GSiA

G.S. International Accounting Co.,Ltd. (GSiA)

About GSiA-Accounting Service Thailand


GSiA-Accounting Service Thailand

  GSiA is a modern Accounting Firms in Thailand managed by a group of young generation accountants. Located nearby Suvarnaphumi airport, the firm was established since 2011.

  We are independent, highly professional, focusing on providing full services for audit, accounting, business consulting and tax examination services for businesses and non-profit organization throughout Thailand.


We have been assisting our clients in doing business in Thailand for more than 100 companies both international and local. Providing exceptional accounting services to clients, our firm is accredited by the Federation of Accounting Profession under the Royal Patronage of His Majesty the King and the Department of Business Development. With our 30 professionals and Management Team who are well trained and educated, we believe that we deliever the highest quality to our clients as same as international firms.


Our mission


Our mission is to assist our clients to do business in Thailand as your business partner in accounting areas. we deliever the highest quality to our clients as same as international firms.

Our Strength


GSiA believes that we should understand the nature of clients’ business first, then, we can advise our clients with our local expertise and international experience.

Our Professionals


30 professionals and Management Team who are well trained and educated, we believe that we deliever the highest quality to our clients as same as international firms.


About Accounting Service

  We are providing highly professional accounting work for the specific periods of time e.g. monthly, quarterly, annually or upon the request of the clients. We are using standard accounting application that supports the transactions of small, medium to large sizes of businesses.

- Accounting Services (Monthly/Quarterly/Annualy)
- Withholding Tax & VAT Submission
- Issuance of Monthly Financial Statements
- Annual Closing

Why choose us

  "GSiA is an independent and highly professional accounting firm, focusing on providing full services for audit, accounting, business consulting and tax examination services for businesses and non-profit organization throughout Thailand"


Our Strength

  GSiA believes that we should understand the nature of clients’ business first, then, we can advise our clients with our local expertise and international experience.

Competitive Advantage

  Considering outsourcing accounting services, the company will be able to save its costs significantly e.g. fixed salary, bonus, welfare, severance liability, and some office expenses e.g. printing, electricity, and paper. Using the accounting outsource is another option to avoid these costs while receiving the full knowledge from people in the accounting firm with fast and reliable information as GSiA.
GSiA trusts that outsourcing services on accounting is a good option that business shall consider to save its cost.



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