A Bangkok audit practice with roots going back to 1992 — incorporated as C&A Audit Office Co., Ltd. in 2015 — serving Thai public & limited companies, financial institutions, and BOI-promoted enterprises with statutory audit, tax, and business consulting.
C&A was founded as a partnership practice — not a franchise, not a back office. Every audit opinion leaves our door with a CPA's signature on it, and that signature belongs to someone who has read the file.
Audit is a relationship with a deadline. It is also a relationship with a signature. For over thirty years we have worked with Thai companies — from family-owned trading houses across Bangkok to listed industrials and foreign-owned BOI enterprises — on the discipline of closing the books, reporting honestly, and meeting the regulator's eye.
We are not a brand name with a Bangkok office. We are a Bangkok office. Our partners qualify under the Federation of Accounting Professions of Thailand; our opinions are accepted by the Revenue Department and the Thai SEC.
When you engage C&A, you engage the partner. That's the practice our founders built in 1992 — first as C&A Accounting Firm, then incorporated as C&A Audit Office Co., Ltd. in 2015 — and that's still the practice today.
Assurance is the backbone. Tax, consulting, and litigation support are delivered by the same partner team, with the same standards of evidence and documentation.
Independent opinion on financial statements in line with Thai Financial Reporting Standards and International Standards on Auditing.
Planning, compliance, and dispute support across corporate income tax, VAT, withholding tax, and specific-business tax.
Full-cycle bookkeeping, monthly close, and advisory for founders establishing or scaling a Thai entity. Supports BOI-promoted companies.
Forensic accounting for civil and tax disputes, and certified TH↔EN translation of audited financials and corporate documents.
Seven CPA-licensed partners, led by Jintana Techamontrigul. Each engagement is owned by a named partner from proposal through report.
A cross-section of Thailand's real economy — from Bangkok-listed industrials to family-owned trading houses, financial institutions, and foreign-invested BOI enterprises.
Our CPA licenses, firm registrations, and regulator approvals are current and verifiable.
Firm and partner registrations under Thailand's statutory professional body for auditors and accountants.
Registered tax preparer and approved representative in Revenue Department examinations and appeals.
Approved auditor for specific categories of SET- and mai-listed companies under SEC Notification.
A quiet trajectory: from a small accounting practice founded in 1992 to a seven-partner audit firm today, formally incorporated in 2015. Growth on our own terms.
15 June · Bangkok. Established as C&A Accounting Firm.
Approved auditor for listed companies under SEC Notification.
Dedicated tax advisory launched; first PND.50 appeal won.
5 January · Renamed to C&A Audit Office Co., Ltd.
Relocated to 53 Narathiwas Ratchanakharin Road · capacity doubled.
Today.
Walk-ins welcome by appointment. Most engagements begin with an email and a thirty-minute conversation.
Send a brief about your entity, last fiscal year, and audit timeline. A partner will respond within two business days.
Email Managing Partner →Send a brief about your entity, last fiscal year, and audit timeline. A partner returns a fixed-fee proposal within two business days — no factory hand-offs, no follow-up by junior associates.