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One Stop Solution for Your Business
Accounting, Tax, and giving advice
to entrepreneurs at an affordable price.
Registration / Accounting / Finance / Import / Export / Insurance / Salary / Tax / Audit / Law
We have established, developed and steadily grown for over decade. Our commitment to sustainable growth is to provide reliable services you can trust.
At Fidelity 789, we strive to grow and support our clients continuously. Our experienced team can provide tailor made solutions for clients.

Certified accountant

Your trusted partner

Plan your business

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We are recommended by local & international authorities.
we strive to grow and support our clients continuously. Our experienced team can provide tailor made solutions for clients.
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Accounting & Finance Solutions
We offer a full range of accounting and tax solutions depending on your individual business needs.
– Bookkeeping and preparing detail support (A/R, A/P, aging-reports, FA schedule, etc.),
– Withholding tax filing (PND.3/53),
– VAT filing (P.P. 30),
– Reconciling stock,
– Preparing statutory financial statement.

























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About Us
Fidelity 789 (former, COA Consulting) was established in Bath City, United Kingdom in 2009 providing accounting, tax, and advisory services to Thai entrepreneurs in the United Kingdom. Then we relocated to Bangkok in 2013. We are part of Wisdom Link Co., Ltd. and APN 636 Advisory Co., Ltd
We provide One Stop Solution for Business; starting from business registration, accounting set up, business process development, account closing, payroll, tax planning, work VISA, ERP selection, and business advisory. We serve clients in different industries, including IT, healthcare, medical clinic, spa, food and beverage, construction, professional service, manufacturing, trading, and etc.