Thailand Company Annual Filing Timetable: AGM, DBD, PND 50/51

Summary

• For foreign shareholders, directors, and de facto operators who already have, or are preparing to set up, a company in Thailand and want a fast, clear picture of what accounting, audit, and filing tasks must be completed within a year.
• Answers three core questions: what needs to be filed each month and each year, how the AGM and DBD financial statements fit together, and when PND 50/PND 51 corporate income tax is due.
• Flags several high-risk points along the way: missing the AGM/financial statement filing, forgetting the PND 50/PND 51 deadlines, and assuming that “no business activity” means no filing is required — all of which can lead to fines or even director liability.

Who Especially Needs This Annual Timetable?

For most foreign operators, the pain point isn’t “can I set up a company in Thailand,” but “once it’s set up, what exactly do I need to do every year, and when will I be chased for penalties.”

• Foreign shareholders or directors of a registered Thai company with no dedicated in-house finance staff: usually only realize there is a full set of accounting and compliance obligations to keep up with when the accountant sends a reminder, or when the DBD or Revenue Department sends a notice.
• Foreign investors and management evaluating whether to set up a company or subsidiary in Thailand: need to factor “the annual audit and tax filing burden” into their operating costs and risk assessment, and want a clear calendar to help estimate the resources required.
• Group finance or compliance staff managing entities in multiple countries: need to schedule Thailand’s accounting year, AGM, DBD filings, and corporate income tax deadlines alongside deadlines in other jurisdictions, to avoid overlap and late filing.

In other words, this isn’t just a “background knowledge” topic — it’s a practical matter that affects the company’s and directors’ liability in real money terms every year.

What a Thai Company Needs to Do in a Year: From Basic Conditions to the Annual Timeline

This section starts with the basic status and conditions every company must meet, then breaks the obligations into two layers — “once a year” and “monthly recurring” — so you can check them against your own company’s accounting year and actual operations.

Which Companies Need to Comply With These Annual Obligations?

In practice, most companies established in Thailand fall under the following requirements:

• Accounting and audit obligations: Thai law requires that all companies, joint ventures, foreign branches, and representative offices registered in Thailand generally prepare annual financial statements each year, audited by a qualified Thai-registered auditor.
• Filing financial statements with the DBD (Department of Business Development): once the audit is complete and the statements are approved by the shareholders’ meeting, the company must normally submit its annual financial statements through the DBD’s “DBD e-Filing” system; the list of shareholders has a separate filing deadline and should not be confused with the financial statement deadline.
• Filing with the Revenue Department: the company must file corporate income tax using form PND 50 (annual) and PND 51 (half-year) as required, generally completed through the “RD e-Filing” electronic system.

If a company is a very small partnership or meets certain exemption conditions, there may be exceptions to the audit obligation, but this usually needs to be judged case by case under the rules in force at the time — you should not assume “small companies don’t need an audit.”

Annual Obligations Overview: A Structure Table First

The table below sets out, at a glance, the terms you will hear throughout the year, so you can match them to the timeline that follows.

What you really need to confirm first:
– Your company’s accounting year-end month (it isn’t necessarily December).
– Whether you are already registered as a VAT payer with the Revenue Department, and whether you have employees (this affects which monthly filings apply).

AGM and DBD Financial Statements: The Annual Milestones Under Company Law

The Annual General Meeting (AGM) is the first key milestone in the whole annual compliance process.

• Based on how professional firms interpret the rules and DBD requirements, a company generally must hold its AGM within 4 months of its accounting year-end to review and approve the previous year’s financial statements.
• Once the AGM has approved them, the company generally must submit the audited and approved financial statements to the DBD within 1 month of the AGM, now mostly done through DBD e-Filing.
• It’s worth noting specifically that the deadline for the shareholders’ list is different from the deadline for the financial statements. A general limited company’s shareholders’ list / Bor Chor 5 must normally be filed with the DBD within 14 days of the AGM — not within 1 month of the AGM.

For example, if a company’s accounting year ends on December 31:
– The AGM should be held by the end of April of the following year at the latest (in practice, companies try to schedule it earlier).
– If the AGM is held in mid-April, the shareholders’ list must generally be filed within 14 days of the AGM, while the financial statements are generally due within 1 month of the AGM through DBD e-Filing.

In general, accountants usually start chasing documents and arranging the audit right after the year-end, to make sure a votable set of financial statements is ready before the AGM.

Note that if the AGM is not held, or the shareholders’ list or financial statements are not filed, within the required time, the DBD can fine the company and its directors separately. Under DBD’s own fine schedule and the underlying statutes:
– Financial statements filed late with the DBD registrar: THB 1,000–6,000 for the company and for each director, depending on the delay.
– Financial statements filed without an auditor’s review: THB 14,000–20,000 for the company and for each manager/partner.
– AGM not held within 4 months, or financial statements not submitted (Offences Act B.E.2499 s.18): a statutory cap of THB 20,000, with a DBD settlement fee starting at THB 6,000 for the company plus THB 6,000 for each director, rising with the delay to THB 12,000 plus THB 12,000.
– Shareholders’ list filed late (Offences Act s.26): a statutory cap of THB 10,000 per director, with a DBD settlement fee of THB 2,000 per director.

PND 50/PND 51: The Annual Timeline as Seen by the Revenue Department

From the Revenue Department’s perspective, the most important milestone for a Thai company is its corporate income tax filing:

PND 50 (annual corporate income tax return):
– Generally must be filed with the Revenue Department within 150 days of the accounting year-end.
– The form sets out the company’s full-year income, costs, and deductions, calculates the tax payable, and credits any PND 51 tax already prepaid.

PND 51 (half-year corporate income tax prepayment):
– Generally must be filed and paid within two months of the end of the first six months of the accounting period — described in English as “within two months after the end of the first half of the accounting period.”
– Most companies use half of their estimated full-year net profit as the taxable income for the first half, calculate the tax at the current rate, and then true up any over- or under-payment at year-end with PND 50.

In general, any company that must pay corporate income tax based on net profit needs to file PND 51; even if a company estimates a full-year loss or no tax payable, it should not assume it can skip filing. Whether special circumstances apply, and how to estimate the prepayment amount, usually needs to be assessed by an accountant based on when the company was first established, its actual operations, and that year’s tax rules.

Monthly Filings and Social Security: Don’t Overlook These “Small” Obligations

Many foreign operators remember only the annual tax filing and overlook the tax and social security filings that must be handled every month.

Withholding Tax:
– If the company pays salaries, service fees, rent, interest, or similar amounts, it generally needs to withhold tax at different rates depending on the type of payment, and file and pay it with the Revenue Department using forms such as PND 1, PND 3, and PND 53 within a set period the following month.
– Paper filing generally closes in the early part of the following month, while e-Filing can allow a later deadline; the exact dates are adjusted according to the Revenue Department’s annual announcements and the electronic system’s rules, so it is best summarized as “must be filed within the deadline the Revenue Department announces for the following month.”

Value Added Tax (VAT):
– If the company is registered as a VAT payer, it needs to submit the relevant forms (such as PP30) every month, reporting output tax and input tax credits, and pay any tax due within the set deadline.
– A common practice is to file VAT for the previous tax month each month; paper and electronic filing deadlines may differ, and the specifics should follow that year’s Revenue Department announcements and the arrangements made by the company’s accountant.

Social Security and Other Labor-Related Filings:
– If the company employs staff, it generally must calculate and pay social security contributions based on salaries every month, with fixed deadlines and an electronic filing system. This is mostly handled by accounting or HR staff together with local advisors; the exact figures and rates may change and should follow that year’s announcements from the relevant labor and social security authorities.

The table below sets out common filing deadlines for reference; the actual dates should still follow the Thai Revenue Department, the social security authorities, and that year’s electronic filing rules.

For most readers, the more important point is this: even if the company’s turnover is low, it must still complete the corresponding monthly and annual filings; “no income, so no need to file” is generally not a safe assumption.

Common Misunderstandings and Risks Around Thai Companies’ Annual Obligations

Misunderstanding 1: No Income Means No Bookkeeping or Audit Is Needed

Many foreign shareholders assume that if the company has no real business or income, it doesn’t need to keep books or produce financial statements. In fact, Thai accounting and company law still require the company to keep accounting records and prepare financial statements every year, and these generally still need to be audited by a registered auditor.

Even with zero income for the whole year, it’s advisable to have an accountant help prepare a simplified set of financial statements and complete the audit and filing, to avoid the DBD or Revenue Department later finding that the obligations were not met.

Misunderstanding 2: The AGM Can Be Delayed Freely, as Long as It’s Eventually Held

Some companies think that since the shareholders are all “their own people,” it’s fine to hold the AGM a little late. But under current rules, the AGM should be held within 4 months of the accounting year-end, and being late can lead to fines for the company and its directors.

If there are special circumstances (such as during a pandemic), the company generally needs to follow that year’s special DBD announcements or emergency regulations, and should not simply assume on its own that “a delay is fine.”

Misunderstanding 3: If PND 50 Has Been Filed, PND 51 Isn’t Necessarily Needed

Some operators only know about the annual corporate income tax (PND 50) and completely overlook the half-year prepayment (PND 51). However, most companies that must pay corporate income tax based on net profit need to file PND 51 within two months of the end of the first half of the year and prepay tax based on estimated profit.

Even if a company estimates a full-year loss or no tax payable, it should not assume on its own that it can skip filing; whether an exemption applies, whether a nil return is possible, or whether special circumstances apply needs to be judged against that year’s Revenue Department rules and the company’s actual figures — it is safer to have a professional accountant assess this.

Misunderstanding 4: As Long as It’s All Left to the Accountant, Directors Don’t Need to Worry

Even if a company outsources its accounting and audit, the legal responsibility for late financial statements, a missed AGM, an unfiled shareholders’ list, or a missed tax filing may still fall jointly on the company and its directors.

Directors should at least understand the key annual milestones and schedule them with the accountant in advance, rather than passively waiting to be notified.

Misunderstanding 5: A Different Accounting Year-End Is Just a Formality

Some people think that as long as an accounting year is chosen at the time of business registration, it makes no real difference in practice. In fact, the accounting year-end directly affects the specific deadlines for the AGM, the DBD financial statements, the shareholders’ list, and PND 50/51.

If a group has companies in multiple countries, it’s best to align the Thai company’s year-end with the rest of the group’s entities as much as possible, to reduce overlapping workloads and the risk of late filing.

Three Real Scenarios: Which One Are You?

Scenario 1: A Newly Established, Not-Yet-Operating Small Company

• Background: A foreign entrepreneur set up a company in Thailand late last year and is still testing the market — with no actual revenue yet and no employees hired.
• The problem: He assumed that “no business means no bookkeeping and no tax filing for now” — until the accountant pointed out that the AGM and DBD financial statement filing deadlines were approaching.
• How to handle it: Even with zero income, the company should still have an accountant help prepare basic accounts and financial statements, hold the AGM within 4 months of the year-end, and file the shareholders’ list and financial statements within the required deadlines afterward — the shareholders’ list generally within 14 days of the AGM, and the financial statements generally within 1 month of the AGM through DBD e-Filing. The company should also assess its PND 50/PND 51 filing arrangements as required.
• Risks and limits: Ignoring these steps can still mean the company is treated as having breached its accounting and company-law obligations, and this may create obstacles later when changing directors, increasing capital, or applying for other permits.

Scenario 2: A Stable Small or Medium-Sized Business With Staff and Revenue

• Background: A Thai company with 10 employees, ongoing revenue, and VAT registration, jointly managed by a foreign shareholder and a local director.
• The problem: The company has monthly payroll, rent, and service-fee spending, but the directors only pay attention to the annual financial statements and corporate tax, overlooking the monthly filing details for withholding tax, VAT, and social security.
• How to handle it: Confirm with the accounting and HR team that withholding tax, VAT, and social security are filed and paid correctly every month as required, while also arranging the audit, AGM, shareholders’ list filing, DBD financial statement filing, and PND 50/PND 51 schedule after year-end — to avoid a situation where “the monthly filings are fine, but the annual ones are late.”
• Risks and limits: Focusing only on the annual tax filing while neglecting the monthly obligations may not be noticeable in the short term, but over time it can lead to back taxes, fines, or even affect future applications for tax certificates or government tenders.

Scenario 3: A Multinational Group Setting Up a New Thai Subsidiary

• Background: A group already operating in multiple countries recently set up a subsidiary in Thailand; the group’s finance function uses different accounting standards and year-ends across its entities.
• The problem: The group’s finance team wants to process the reports and taxes of all its subsidiaries together, but finds that Thailand’s AGM, shareholders’ list, DBD financial statements, and PND 50/PND 51 timing don’t line up with the other countries.
• How to handle it: At the setup stage, or early on, confirm a suitable accounting year with local Thai accountants and lawyers, and lay out a calendar coordinated with the group’s overall rhythm, clearly marking the AGM, shareholders’ list filing, DBD financial statement filing, and Revenue Department deadlines.
• Risks and limits: Ignoring these differences can create pressure on staff time when the group’s internal closing period overlaps with Thailand’s statutory deadlines, increasing the chance of late or incorrect filings.

Frequently Asked Questions on Annual Filing and Tax for Foreigners’ Companies in Thailand

Q1. If a company set up in Thailand has no income at all in a given year, does it still need an annual audit and tax filing?

In most cases, even if the company temporarily has no income or real operations, it must still prepare annual financial statements as required by accounting and company law, have them audited by a qualified auditor, file the shareholders’ list and financial statements with the DBD as required, and assess whether it needs to file PND 50/PND 51 and other corporate income tax returns. In practice, an accountant is usually asked to handle the filing under a “zero income” scenario, rather than simply skipping it.

Q2. Does the AGM have to be held in person in Thailand? Can it be done online or by written resolution?

The key requirement under current rules is whether the company completes the shareholders’ review and approval of the financial statements within 4 months of the accounting year-end, in the form required by its articles of association and applicable regulations. In practice, whether an online meeting or a written resolution can be used depends on company law amendments in force at the time, emergency decrees (such as during a pandemic), and the company’s own articles — it isn’t a one-size-fits-all answer. So before deciding on the AGM format, it’s advisable to have a lawyer or company secretary review the articles of association and the latest rules.

Q3. Can a company choose not to file the PND 51 half-year corporate tax prepayment?

In general, most companies that need to pay corporate income tax must file PND 51 within two months of the end of the first half of the accounting year, and prepay part of the tax based on estimated full-year profit. Even if a company estimates a loss or no tax payable, it should not assume on its own that it can skip filing. Whether an exemption, nil filing, or special rule applies depends on the company’s size, when it was established, its profitability, and that year’s Revenue Department policy — it’s best assessed by a professional familiar with Thai tax based on the actual figures.

Q4. What happens if a company misses the deadline for filing financial statements or the shareholders’ list with the DBD?

If the financial statements or shareholders’ list are not filed on time, the DBD can fine the company and the relevant directors, and the longer the delay, the greater the potential liability. Under DBD’s fine schedule, late financial statements filed with the DBD registrar carry a THB 1,000–6,000 fine for the company and for each director (rising with the delay); statements filed without an auditor’s review carry a THB 14,000–20,000 fine for the company and for each manager/partner; and a late shareholders’ list carries a statutory cap of THB 10,000 per director, with a DBD settlement fee of THB 2,000 per director. It’s generally advisable to file as soon as possible and discuss with a lawyer or accountant whether a reduction or an explanation of special circumstances can be requested.

Q5. Is it mandatory to use DBD e-Filing and RD e-Filing? Can paper filing still be used?

Based on DBD announcements from some years ago and subsequent practice, financial statement filing has gradually moved to full use of DBD e-Filing, with paper filing largely reduced or removed. The Revenue Department has also introduced a new RD e-Filing system, encouraging or requiring taxpayers to file and pay through the electronic system. However, different types of taxpayers and forms may have different requirements during the transition, so it’s best to check that year’s official guidance or confirm with an accountant before proceeding.

Q6. Can I file taxes and financial statements myself, or do I need an accountant and a lawyer?

Legally, the company needs a qualified registered auditor to issue the audit report — that part cannot be done by the company itself. General bookkeeping, monthly tax filing, and e-Filing operations can, in theory, be handled by the company itself, but because the process involves multiple forms and systems, and errors or late filing can bring fines and further tax risk, most foreign-owned companies choose to outsource this to professional accounting or advisory teams, with the directors responsible for tracking the key milestones and bearing ultimate responsibility.

Q7. How does Thai companies’ annual compliance differ from BOI (Board of Investment) requirements?

The general accounting, audit, and tax filing obligations described above apply to most companies registered in Thailand. If a company has received incentives from the BOI (Board of Investment), it may need to meet additional reporting and operating conditions beyond the general obligations above — such as investment amount, staffing, and export ratio. The specific requirements vary by the approved BOI project, and generally require checking the BOI approval certificate and related guidance directly, rather than applying the general company compliance rules across the board.

Have a question about company setup or tax compliance in Thailand? Ask Zagdim.

Disclaimer

*This article is a general summary based on multiple official and authoritative sources from 2021–2026 (including the Thai Department of Business Development’s annual reports and e-Filing system explanations, the Revenue Department’s guidance on corporate income tax filing, and summaries by several international accounting and law firms on AGM, PND 50/PND 51, and annual audit requirements). It is for general information only and does not constitute legal, tax, financial, or other professional advice; the rules that actually apply may vary depending on the type of company, year-end month, industry regulation, e-filing deadlines, and policy updates. Before making any major decision, readers should check the latest official announcements from the relevant Thai authorities and, where needed, consult a qualified accountant, lawyer, or tax advisor for advice suited to their own situation.*

Have a question about this guide? Leave a comment below, or ask Zagdim directly.

Sources

*Department of Business Development (DBD) – Annual Report & e-Filing guidance / The Revenue Department – e-Service & e-Filing guidance / Deloitte Thailand – Legal Alert: Submission of financial statements / Tilleke & Gibbins – Annual General Meeting Requirements / Acclime Thailand – Thailand Tax Submission Forms / Sukhothai Interlaw – Audited Annual Financial Statements in Thailand / Ricool Accounting – Thailand’s monthly tax filing and annual reporting obligations / BizWings – Annual Filing Obligations for Companies in Thailand / Forvis Mazars – Filing Financial Statements Late / Nishimura & Asahi – New e-Filing system launched by the Revenue Department / EY – Thailand investment guide*