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Administration Outsourcing Co., Ltd.

Administration Outsourcing is a specialist professional accounting, taxation, payroll, and corporate services firm which focuses on being the Finance & Accounting department for international and private businesses in Bangkok. Our goals are to help our customers to fundamentally establish and run their businesses more effectively and profitably, by giving them clear, easily understood, meaningful corporate structure, financial and tax planning, monthly Profit and Loss accounts and Balance Sheets, together with the associated accounting, payroll, and tax advisory services. All our services are delivered a confidential, commercially aware, reliable & speedy way.

The company is conveniently based in Chidlom, central Bangkok, and we work to international accounting and taxation standards, at reasonable prices.

Our teams’ background includes CPAs, CFOs, two Lawyers, a Tax Adviser, and Management Accounting staff in international/multinational companies in five continents, so we are able to provide valuable support and practical advice that works, in a discrete and professional manner.

Our customers come from a cross section of the international community in Bangkok, covering a wide range of business sectors

Product & Services

  • Corporate Accounting & Tax Structuring

  • Company Establishment, Foreign Business License, & BOI

  • TRD/SSF Registration, Contract Review, Corp. Secretarial

  • Management Accounts, Bookkeeping, & Budgeting

  • Monthly Payroll Processing & Personal Income Taxes

  • Payables/Payments and Receivables/Collections

  • Taxation Compliance and Advisory 

  • Corporate Income Tax, Tax refunds & Tax Audit Protection

  • International Tax Plans, Transfer Pricing, DTA Advice

  • Structuring Cross-Border Investments & Transactions

  • Dissolution & Liquidation, Final Tax Clearance


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Chief Executive Officer

John Casella

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Peter Upperton


Dominik Heer 


Address: 518/5 Maneeya Center Building, 16th Floor,
Ploenchit Road, Lumpini, Pathumwan

City:  Bangkok

Postal Code: 10330

Country: Thailand

Phone Number: +66 (0) 2 684 1699
                               +66 (0) 81 8298954

Fax Number: +66 2 652 0766

General Email:


Business Activity: Accounting, Taxation, Payroll, and Corporate Legal Outsourcing, Business Services, Financial Services

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