Accounting and tax filing for foreign-owned Thai companies

Withholding tax returns (PND 1, 3 and 53) and VAT (PP 30) are due in the first half of the following month, together with the social security contribution for every employee. Late filing triggers surcharge and penalty even when no tax is payable, so a nil return is still a return that must be submitted.

Yes. Thai law requires a company's books to be maintained under a qualified accountant registered with the Department of Business Development, and financial statements must be certified by a licensed CPA auditor before submission. A foreign-managed spreadsheet is not a statutory book of account.

Audited financial statements must be approved at a shareholders' meeting within four months of the fiscal year end and filed with the DBD within one month of that meeting, with the corporate income tax return (PND 50) due within 150 days of year end. A half-year return (PND 51) falls due two months after the first six months.

Registration is mandatory once annual revenue exceeds the statutory threshold, and voluntary registration is available below it. Companies employing foreigners often register early because VAT registration and filed returns are part of the evidence pack immigration and the labour department review for work permits and visa extensions.

Directly. Extensions of stay and work permit renewals are assessed against filed financial statements, VAT returns, withholding filings and social security records for the required Thai staff. Books that are behind are the most common reason an otherwise valid renewal is refused.

Yes. Statutory books and filings are prepared in Thai as the law requires, and we issue a parallel English management pack — profit and loss, balance sheet, cash position and tax calendar — so a foreign director can sign with a clear understanding of what is being filed.

Thai companies withhold at source on most service payments, rent, professional fees and dividends, at rates that vary by payment type and by whether the recipient is an individual or a company. The certificate you issue to the supplier is their credit — issuing it late or at the wrong rate creates a dispute and an assessment risk.

Yes. We reconstruct prior periods from bank statements, invoices and payroll records, quantify the surcharge exposure, file the outstanding returns in the order that minimises penalty, and then move the company onto a clean monthly cycle.