M&A Accounting and Tax Co.,Ltd.
M&A Accounting and Tax Co., Ltd. is a full-service accounting and back-office outsourcing firm based in Bangkok, Thailand. Since our establishment in 2001, we have supported a wide range of foreign investors — particularly Japanese businesses — seeking reliable, transparent, and professional financial services in Thailand.
We specialize in accounting, tax compliance, payroll services, IT support, and administrative back-office solutions. Our experienced team understands the unique challenges that foreign companies face when entering the Thai market, and we are committed to providing seamless, multilingual support — including native Japanese-speaking customer liaisons.
As a firm certified under ISO 9001:2015, we uphold the highest standards in quality management and service delivery. In recognition of our excellence in innovation and digital transformation, we are proud to have received the Platinum Award for Thailand Digital Accounting Firm in 2024 — a national honor that reflects our leadership in the industry.
At M&A, we believe in becoming more than just a service provider. We aim to be a true business companion to our clients, growing together and helping them make informed decisions through timely, accurate, and easy-to-understand financial information.
Whether you’re establishing a new entity or enhancing existing accounting operations, our mission is to deliver accurate, timely, and confidential financial statements that empower your management team to make manage risks, seize opportunities, and grow with confidence.

Achieved ISO 9001:2000 certification
First ISO milestone for our quality management system.
Achieved ISO 9001:2008 certification
Upgraded certification under the updated standard.
“Quality Accounting Firm” (DBD, Ministry of Commerce, Thailand)
National recognition for service quality.
Achieved ISO 9001:2015 certification
Aligned with the latest risk-based quality framework.
“Digital Accounting Firm — Platinum Award (No. 1)” (DBD, Ministry of Commerce, Thailand)
Top-tier award for digital transformation.




























