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About AO

AO is Thailand’s leading boutique business expansion specialist, with International knowledge and local expertise in business management, accounting, corporate legal services, governance and  payroll tax attorney.

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International Expertise

Decades of experience serving multiple developed and developing markets.

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Local Mastery

Deep knowledge of the Thai market to better serve local businesses.

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Bespoke Solutions

Tailored accounting and legal services that fit your unique needs.

About Our Company History

AO was founded in 2006 by  Peter Upperton, a Chartered Accountant and CPA, in response to the market need to provide efficient, accurate, on time and cost-effective accounting reports, management accounts, cost accounting, seamless tax submissions, tax refunds, professional and compliant payroll services, and company secretarial services, in English, from a commercial point of view rather than a compliance perspective. 

The company expanded quickly and carefully, through organic growth, and currently services well over 100 organisations, ranging from small businesses to public companies, centering on the Thai-based subsidiaries of multinational corporations. Accounting services and audit liaison are also provided for our customers having companies in Singapore, the UK, the USA, Australia and other international jurisdictions.

So what AO offers is a mirror image of the financial division of a large public company, providing the same services to smaller businesses who otherwise can’t access such skill, knowledge and expertise in an economic way.

Company History

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AO was founded in 2006 by  Peter Upperton, a Chartered Accountant and CPA, in response to the market need to provide efficient, accurate, on time and cost-effective accounting reports, management accounts, cost accounting, seamless tax submissions, tax refunds, professional and compliant payroll services, and company secretarial services, in English, from a commercial point of view rather than a compliance perspective. 

The company expanded quickly and carefully, through organic growth, and currently services well over 100 organisations, ranging from small businesses to public companies, centering on the Thai-based subsidiaries of multinational corporations. Accounting services and audit liaison are also provided for our customers having companies in Singapore, the UK, the USA, Australia and other international jurisdictions.

So what AO offers is a mirror image of the financial division of a large public company, providing the same services to smaller businesses who otherwise can’t access such skill, knowledge and expertise in an economic way.

About Our Leadership Team

Our management team have extensive experience working with a number of developed and developing markets including: the United Kingdom, North America, Australia, Switzerland, Germany, Kenya, Hong Kong, Singapore, and Thailand.

About AO, Who We Are, How We Work | AO 2024 Best Accounting Thailand

Our Leadership Team

About AO, Who We Are, How We Work | AO 2024 Best Accounting Thailand

Our management team have extensive experience working with a number of developed and developing markets including: the United Kingdom, North America, Australia, Switzerland, Germany, Kenya, Hong Kong, Singapore, and Thailand.

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