Every legal entity that operates in Thailand is required to keep proper books of account, prepare audited financial statements, and file them with the Department of Business Development each year. The rules look administrative at first sight, but they are governed by a clearly defined statutory framework, they carry hard deadlines counted from the closing date of the accounting period, and they expose both the company and its directors to a layered set of fines and, in serious cases, criminal liability. With the Department of Business Development now requiring electronic submission in XBRL format and the Revenue Department cross-referencing financial statements against tax filings and transfer pricing data, the cost of getting financial reporting wrong has increased significantly. This article explains the legal framework, the components of the financial statements, the audit and approval steps, the filing deadlines for each type of entity, the penalties for late or incorrect filing, and the practical steps that foreign-owned companies should put in place to remain compliant in 2026.

The Legal Framework Governing Financial Statements in Thailand

The Accounting Act B.E. 2543 (2000) is the central statute

The cornerstone of financial reporting obligations in Thailand is the Accounting Act B.E. 2543 (2000). Section 8 of the Act identifies who has a duty to keep accounts, namely registered partnerships, limited companies and public limited companies established under Thai law, juristic persons established under foreign law that engage in business in Thailand, and joint ventures under the Revenue Code. Section 9 fixes the moment from which accounts must be kept, which is the date of registration as a juristic person or, for foreign juristic persons, the date the business in Thailand commences. Section 10 sets the rule that the accounting period must be twelve months, with limited exceptions for newly incorporated entities, the year of dissolution, and approved changes of accounting period.

Section 11 is the operational provision that most directors and managing partners need to understand. It sets the deadline for the submission of financial statements, requires audit by an authorized auditor, and reserves to the Director-General of the Department of Business Development the discretion to extend or postpone the filing date in cases of necessity.

Other instruments that apply alongside the Accounting Act

Several other statutes operate in parallel. The Civil and Commercial Code regulates the corporate governance of private limited companies, including the obligation under Section 1197 to convene an annual general meeting for the approval of the audited financial statements within four months of the end of the financial year. The Public Limited Companies Act B.E. 2535 (1992) imposes equivalent and somewhat more demanding obligations on public limited companies, including the obligation to publish the balance sheet for public information. The Revenue Code applies to the corporate income tax return that must be filed on the basis of the audited financial statements, and the Federation of Accounting Professions Act B.E. 2547 (2004) regulates the licensing of certified public accountants who audit those statements. The Thai Financial Reporting Standards (TFRS) issued by the Federation of Accounting Professions are the technical accounting framework that the financial statements themselves must follow.

The Components of Financial Statements under Thai Law

The Accounting Act defines a financial statement as a report of the results of the operation, financial status, or changes in financial status of the business. In practice, a complete set of financial statements prepared under the Thai Financial Reporting Standards consists of five elements:

• The statement of financial position, traditionally called the balance sheet, which presents assets, liabilities, and shareholders' equity at the end of the period.
• The income statement, also referred to as the profit and loss statement, which reflects revenues, expenses, and net profit or loss for the period.
• The statement of changes in equity, which details movements in share capital, statutory reserves, retained earnings, and other components of equity.
• The statement of cash flows, which is required for publicly accountable entities and recommended for non-publicly accountable entities.
• The notes to the financial statements, which describe the accounting policies, significant judgments, and detailed disclosures, including related-party transactions.

The notes are not a formality. They form the documentary basis on which the Revenue Department will assess the consistency between the company's accounting position and its tax declarations, particularly with respect to intra-group transactions, royalties, management fees, dividends, and cross-border payments to related parties.

TFRS, TFRS for NPAEs, and the Relationship with IFRS

Thailand applies two parallel sets of accounting standards. The Thai Financial Reporting Standards (TFRS), which broadly mirror the International Financial Reporting Standards (IFRS) but typically with a one-year delay in adoption, are required for publicly accountable entities such as listed companies, financial institutions, insurance companies, securities companies, and mutual funds. The Thai Financial Reporting Standards for Non-Publicly Accountable Entities (TFRS for NPAEs) are a simplified set that may be applied by entities that are not publicly accountable, with the option to apply full TFRS instead.

For foreign-owned subsidiaries, this two-tier system frequently creates a reconciliation gap. The local statutory accounts must be prepared under TFRS or TFRS for NPAEs, while the parent group will typically consolidate under full IFRS, US GAAP, or another national framework. The differences are usually manageable but require attention, particularly in the areas of revenue recognition, leases, financial instruments, and impairment. Working with a Thailand-based auditor who is fluent in both the local rules and the parent's reporting framework reduces the cost and the risk of last-minute year-end adjustments.

Audit and Approval Requirements

The audit obligation under Section 11 of the Accounting Act

Section 11 paragraph four of the Accounting Act requires the financial statements to be audited and accompanied by a formal opinion from an authorized auditor. In Thailand, the audit must be performed by a Certified Public Accountant licensed by the Federation of Accounting Professions. The audit covers compliance with the Thai Financial Reporting Standards, the accuracy and completeness of bookkeeping, and the absence of material misstatement.

The only statutory exemption from the audit requirement applies to certain registered partnerships established under Thai law where the capital, assets, or income remain below the thresholds prescribed by Ministerial Regulation. Limited companies and public limited companies cannot benefit from any audit exemption regardless of their size or activity, and foreign juristic persons engaged in business in Thailand are also subject to mandatory audit.

Approval by the annual general meeting

Once the audited financial statements are signed by the auditor, they must be submitted to the shareholders for approval. Section 1196 of the Civil and Commercial Code requires the directors of a private limited company to convene the ordinary annual general meeting within six months of incorporation and at least once every twelve months thereafter, while Section 1197 fixes the practical timing by requiring the audited balance sheet to be presented to shareholders within four months of the closing of the accounts. The Public Limited Companies Act B.E. 2535 imposes a parallel four-month rule on public limited companies.

For foreign branches, representative offices, and regional offices, no shareholders' meeting is held in Thailand because the head office abroad is the corporate center. The financial statements of the Thai operation are therefore submitted directly without prior approval by a Thai meeting, although the head office's internal approval procedure remains relevant for governance purposes.

Filing Deadlines by Entity Type

The deadlines that apply to the filing of audited financial statements vary depending on the type of entity. Counting from the closing date of the accounting period, which is typically 31 December for entities that follow the calendar year, the principal deadlines are summarized in the table below.

For an entity with a fiscal year ending on 31 December 2025, this means that the annual general meeting of a limited company must in principle be held no later than 30 April 2026, the list of shareholders (Bor Or Jor 5) must be filed no later than 14 days after the meeting, and the audited financial statements must reach the Department of Business Development within one month of the meeting. The Revenue Department deadline of 150 days for the corporate income tax return runs in parallel and is independent of the date of the annual general meeting.

How to File: DBD e-Filing and the XBRL Format

Mandatory electronic filing since 1 April 2020

Since 1 April 2020, audited financial statements and lists of shareholders must be filed with the Department of Business Development through the DBD e-Filing system. Paper filings are no longer accepted. The system runs at https://efiling.dbd.go.th and requires the company's authorized signatory or its appointed representative to register an account, link the account to the company, and obtain digital authentication.

The XBRL format

Submissions must be made in eXtensible Business Reporting Language (XBRL), the standard structured-data format adopted by the DBD. The Department of Business Development publishes a free DBD XBRL in Excel template that companies can complete with the figures of the audited financial statements before exporting an XBRL package and uploading it through the e-Filing system. The audit report and the signed Thai-language financial statements are uploaded as supporting documents alongside the XBRL package. The list of shareholders (Bor Or Jor 5) is filed through the same portal and must mirror the shareholding situation as of the date of the annual general meeting.

Department of Business Development cooperation date for fiscal year 2025

For entities with a fiscal year ending 31 December 2025, the Department of Business Development has called on legal entities to submit their financial statements through the DBD e-Filing system by 2 June 2026. This call for cooperation does not extend the statutory deadlines under the Accounting Act and the Civil and Commercial Code, but it provides a clear administrative target and reduces the risk of last-minute system congestion in the closing days of the filing window.

Penalties and Liabilities for Non-Compliance

The Department of Business Development administrative settlement schedule

Section 41 of the Accounting Act allows the Director-General of the Department of Business Development to settle most fines administratively. The DBD applies a published schedule of settlement amounts that increases with the length of the delay. While the exact figures may be updated from time to time, the practice in 2026 is broadly as follows for the late filing of financial statements by a private limited company:

• Up to 2 months late: a settlement fine of THB 1,000 on the company and THB 1,000 on the managing director.
• More than 2 months and up to 4 months late: a settlement fine of THB 4,000 on the company and THB 4,000 on the managing director.
• More than 4 months late: a settlement fine of THB 6,000 on the company and THB 6,000 on the managing director.

If the case is not settled administratively, the matter can proceed to court for full prosecution under the relevant statutory provisions.

Statutory criminal fines under the Accounting Act

Beyond the administrative settlement schedule, the Accounting Act sets the statutory ceiling of the fines. The most relevant provisions for financial statement compliance are summarized in the table below.

Personal liability of directors and managing partners

Section 40 of the Accounting Act is the provision that turns these company-level offenses into personal exposure for the people who run the business. Where the offender is a juristic person, the managing director, the managing partner, the representative of the juristic person, or any person responsible for its operations is liable to the same penalty as that prescribed for the offense, unless that person can prove that he did not participate in or consent to the commission of the offense. In practical terms, this is why the DBD's administrative settlement schedule routinely imposes the same fine twice, once on the company and once on the managing director.

AGM-related fines under the Civil and Commercial Code

Failure to convene the annual general meeting within four months of the financial year-end constitutes a separate breach of the Civil and Commercial Code and exposes the directors to additional fines on top of the financial statement fines. The combined effect of missing the AGM and missing the filing deadline can therefore double the fine exposure for a small management mistake.

Risk of automatic deregistration

The most serious administrative consequence of chronic non-filing is the loss of legal personality. If a company fails to submit its financial statements for three consecutive accounting periods, the Department of Business Development can declare the company defunct and remove it from the registry. Once deregistered, the company loses its standing to enter into contracts, sue or be sued, and operate bank accounts. Reinstatement requires a court application and the payment of all outstanding fines, which is rarely cost-effective.

Tax penalties under the Revenue Code

Late filing of the corporate income tax return triggers a separate set of penalties under the Revenue Code, including a surcharge equal to 1.5 percent per month of the unpaid tax (capped at the amount of the tax itself), a penalty of 100 percent of any underpaid tax, and a criminal fine of up to THB 2,000 for failure to file. False statements in the return or in the supporting financial statements can lead to a 200 percent penalty in addition to the surcharge and to criminal liability under Section 37 of the Revenue Code.

Transfer Pricing Disclosure under Section 71 bis of the Revenue Code

Companies with related-party transactions must keep transfer pricing in mind when preparing their financial statements. Section 71 bis of the Revenue Code, introduced by the Act Amending the Revenue Code (No. 47) B.E. 2561 (2018), allows the Revenue Department to adjust the income and expenses of taxpayers whose related-party transactions deviate from arm's length terms. Section 71 ter requires taxpayers with annual revenue of at least THB 200 million to file a Transfer Pricing Disclosure Form together with the corporate income tax return (PND 50) within 150 days of the financial year-end.

Failure to file the disclosure form, or filing it with incorrect information without justification, exposes the company to a fine of up to THB 200,000 under the Revenue Code. The Disclosure Form does not replace the obligation to maintain a Transfer Pricing Local File, which the Revenue Department may request within 60 days of a written notice and which must be available for entities engaged in significant intra-group transactions, regardless of revenue level. The notes to the financial statements should be consistent with the related-party disclosures made in the Disclosure Form, and any divergence is a known trigger for tax audits.

Specific Considerations for Foreign Companies and Branches

Foreign-owned Thai subsidiaries are subject to exactly the same financial reporting obligations as locally owned companies. The differences arise from operational complexity rather than legal substance. The local accounts must be prepared in Thai or in a foreign language with a Thai translation, the audit must be performed by a Thai-licensed Certified Public Accountant, and the figures must reconcile with the consolidated reporting of the parent group, often under a different framework. Intra-group transactions, including service fees, royalties, and shared costs, must be supported by intercompany agreements, transfer pricing documentation, and a clear paper trail of the underlying services or goods.

For foreign branches, representative offices, and regional offices, the simplification of the audit cycle (no shareholders' meeting required and a five-month filing window) is offset by stricter scrutiny of the head-office relationship. Funds remitted from abroad must be traceable, costs allocated to the Thai operation must be documented, and the branch must be able to demonstrate that its income reflects the substance of the activities actually performed in Thailand. The Revenue Department applies the same Section 71 bis principles to head-office charges as it does to inter-company arrangements between separate juristic persons.

Accounting Records Retention

Section 14 of the Accounting Act requires the company to retain its accounts and the documents related to them for a period of not less than five years from the date the accounts are closed. The Director-General may, by notification, extend this period to up to seven years for certain types of business. The Revenue Code likewise requires tax-related records to be kept for at least five years and, in tax-audit situations, up to seven years. In practice, given the time it can take for a tax audit to commence, it is prudent to retain accounting records for seven years and to retain digital backups for the full period rather than rely on paper storage alone.

Best Practices to Stay Compliant in 2026

The compliance burden in Thailand is real, but it is also predictable. Companies that put the right processes in place at the beginning of the financial year do not run into last-minute penalties. The following practices are the most effective in our experience.

First, lock the calendar early. The annual general meeting should be scheduled in February for a 31 December year-end, not in late April. Pushing the meeting against the four-month deadline leaves no margin for unexpected auditor questions, board availability problems, or technical issues with the DBD e-Filing system.

Second, engage the auditor at least three months before the year-end. The auditor needs time to review the trial balance, request supporting documents, and form an opinion. Auditors are typically overbooked between January and April, and engagement letters signed in March often translate into delayed audits and missed deadlines.

Third, prepare the XBRL package as soon as the auditor signs the report. The XBRL conversion is the step that most often causes filing errors, particularly mapping mismatches between the auditor's chart of accounts and the DBD taxonomy. Doing the conversion early gives time to correct errors before the deadline.

Fourth, keep transfer pricing documentation up to date during the year, not at year-end. Intercompany agreements should be signed before the transactions occur, benchmarking studies should be refreshed annually, and the Local File should be substantially complete by the time the auditor begins fieldwork. This avoids both the THB 200,000 disclosure-form fine and the much larger income adjustments that can follow a Revenue Department challenge.

Fifth, make sure the directors and the managing partners understand their personal exposure. Section 40 of the Accounting Act, Section 1199 of the Civil and Commercial Code, and Section 37 of the Revenue Code all impose personal liability on the people who run the company. A company-level fine that is paid out of the corporate bank account is not the end of the story when the director's name is also on the prosecution.

How Juslaws & Consult Can Help

At Juslaws & Consult, our corporate, tax, and accounting teams advise foreign-owned Thai companies, Thai limited companies, foreign branches, and joint ventures on the full lifecycle of financial reporting compliance. We coordinate the audit with our network of licensed Thai Certified Public Accountants, prepare and review the XBRL package before submission, file the financial statements and the Bor Or Jor 5 through the DBD e-Filing system, and keep the calendar of statutory deadlines on behalf of our clients.

For foreign-owned groups, we work with the parent's finance team to reconcile the Thai statutory accounts with the group reporting framework, draft and review intercompany agreements, prepare the Transfer Pricing Disclosure Form, and maintain the Local File at the level required by the Revenue Department. Where a company has fallen behind on its filings, we manage the catch-up filings, negotiate the administrative settlement of the related fines, and put in place the controls needed to prevent a recurrence.

If you are preparing your 2025 financial statements, planning a change of fiscal year, restructuring a group of Thai entities, or facing a Revenue Department audit, contact us for a consultation. The cost of preventive advice is consistently lower than the cost of remediating a compliance failure.

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Frequently Asked Questions

Are financial statements mandatory for every company in Thailand?

Yes. Under Section 8 of the Accounting Act B.E. 2543 (2000), every registered partnership, limited company, public limited company established under Thai law, foreign juristic person engaging in business in Thailand, and joint venture under the Revenue Code has a duty to keep accounts and prepare financial statements for each accounting period. The obligation does not depend on the company's revenue or whether it is dormant.

Do all financial statements need to be audited?

In nearly all cases, yes. Section 11 paragraph four of the Accounting Act requires the financial statements to be audited and accompanied by an opinion from an authorized auditor. The only exemption applies to certain registered partnerships established under Thai law where capital, assets, or income remain below the thresholds set by Ministerial Regulation. Limited companies, public limited companies, and foreign branches must always have their financial statements audited.

What is the deadline to file financial statements with the Department of Business Development?

A private limited company must hold the annual general meeting within four months of the fiscal year-end and file the audited financial statements within one month of that meeting. A public limited company is on the same calendar but must also publish the balance sheet in a newspaper within one month of approval. A foreign branch, representative office, regional office, registered partnership, or joint venture must file within five months of the fiscal year-end. For entities with a 31 December 2025 year-end, the Department of Business Development has called for filing through the DBD e-Filing system by 2 June 2026.

Who is personally responsible for filing the financial statements?

The managing director of a limited company, the managing partner of a registered partnership, or the authorized representative of a foreign branch is personally responsible. Section 40 of the Accounting Act extends the company's liability to these individuals, unless they can prove that they neither participated in nor consented to the breach. In a foreign branch, the country manager listed on the work permit will normally be the responsible person.

What are the fines for filing financial statements late?

The Department of Business Development applies an administrative settlement schedule that imposes broadly THB 1,000 to THB 6,000 on the company and the same amount on the managing director, depending on the length of the delay. If the matter is not settled administratively, the statutory ceiling under Section 30 of the Accounting Act is THB 50,000 on the company and a further THB 50,000 on the managing director. Failure to convene the annual general meeting in time triggers separate fines under the Civil and Commercial Code, and late filing of the corporate income tax return triggers a 1.5 percent per month surcharge plus a 100 percent penalty on any underpaid tax under the Revenue Code.

What happens if a company never files its financial statements?

Three consecutive years of non-filing trigger an administrative power of the Department of Business Development to declare the company defunct and remove it from the registry. The company loses its legal personality, its bank accounts can be frozen, and it can no longer enter into valid contracts or sue or be sued. Reinstatement is possible only by court application and is rarely cost-effective. Directors remain personally liable for any unpaid fines.

Are foreign-owned subsidiaries treated differently from Thai-owned companies?

Not in terms of statutory obligations. A Thai limited company that is foreign-owned must keep accounts, audit, approve, and file in exactly the same way as a Thai-owned company. The practical difference lies in the additional documentation usually required for intra-group transactions, transfer pricing, and consistency between the local TFRS-based statements and the parent group's IFRS or GAAP consolidation.

How are financial statements connected to the corporate income tax return?

The audited financial statements are the documentary basis of the corporate income tax return (PND 50). Net profit per the financial statements is adjusted for Thai tax purposes (non-deductible expenses, exempt income, depreciation differences) to produce taxable income. Any inconsistency between the figures filed with the Department of Business Development and the figures filed with the Revenue Department is a recognized audit trigger.

Do I need to file a Transfer Pricing Disclosure Form?

Companies with annual revenue of at least THB 200 million that have related-party transactions must file the Transfer Pricing Disclosure Form together with the PND 50, within 150 days of the fiscal year-end, under Section 71 ter of the Revenue Code. Failure to file, or filing with incorrect information without justification, exposes the company to a fine of up to THB 200,000. The Disclosure Form is separate from the Local File, which the Revenue Department can request within 60 days of a written notice.

Can incorrect or falsified financial statements lead to imprisonment?

Yes. Section 39 of the Accounting Act provides for imprisonment of up to two years and a fine of up to THB 40,000 for any person who makes a false entry, an alteration, or an omission in the accounts or financial statements. Section 38 provides for imprisonment of up to one year (or two years for the person having the duty to keep accounts) for damaging, destroying, hiding, or rendering useless the accounting records. Tax fraud under Section 37 of the Revenue Code, which often relies on falsified accounts, is punishable by imprisonment of three months to seven years.

How long must accounting records be kept?

Section 14 of the Accounting Act requires the company to retain its accounts and related documents for at least five years from the date the accounts are closed, with the possibility for the Director-General to extend the period up to seven years. The Revenue Code likewise requires tax-related records to be retained for at least five years. In practice, given the time it can take for a tax audit to commence, retaining records for seven years (with secure digital backups) is the prudent approach.

Can a company change its fiscal year-end?

Yes, but only with the prior written approval of the Director-General of the Revenue Department under Section 65 ter of the Revenue Code, supported by a valid business reason. The Department of Business Development must also be informed. Once approved, the change is reflected in the company's accounting period and triggers a transitional short-period filing.

Why should foreign-owned companies seek professional assistance?

Thai financial reporting obligations involve a chain of statutory deadlines, an electronic filing format that is not intuitive, a published fine schedule that compounds quickly, and personal liability for directors and managing partners. Adding the layer of TFRS-to-IFRS reconciliation, transfer pricing documentation, and tax-audit risk for foreign-owned groups makes the process technical. Coordinated legal, accounting, and tax assistance reduces compliance cost, prevents fines, and protects the people whose names sit on the company's filings.