Accounting Firm in Thailand — Bookkeeping, Tax and Company Setup
Our accounting team takes care of a Thai business from incorporation and VAT registration through monthly bookkeeping, tax filings and the annual financial statements. Because we also have lawyers and a registrable virtual office in the same company, foreign owners get one point of contact instead of several providers.
Quick answer
A Thai limited company must keep accounts, file withholding tax and social security every month, file PP.30 monthly if VAT-registered, and close audited financial statements each year. Send us your income and expense documents monthly; we record them and remind you of every filing deadline. Fees: ask our team for a quote.
Fees: ask our team for a quote · LINE @Thainotary · Call 094-8958999
Choose the service that fits your matter
What we need from you each month
- Sales invoices and receipts issued
- Purchase invoices, full tax invoices and expense receipts
- Bank statements for every company account
- Payroll details: new hires, resignations, salary changes
- Contracts or unusual transactions (loans, asset purchases, foreign payments)
Pitfalls that cost businesses money
- Late PND or PP.30 filings trigger surcharges and penalties — keep to the monthly deadline
- Expenses without a proper tax invoice may not be deductible
- Directors' personal spending mixed with company accounts creates tax risk
- Foreign-owned companies have extra reporting duties; plan them before year-end
Why owners choose us
- More than 15 years of experience serving Thai and foreign-owned businesses
- Accounting, legal, notary and translation handled in one company
- Reports explained in English, not just filed
- Scope and monthly fee agreed in advance — ask our team for a quote
How we work with you
- Tell us about your business via LINE @Thainotary, email or phone 094-8958999
- We review your company status and past filings and propose a scope
- Sign the service agreement and set up a monthly document routine
- We record transactions and file tax and social security on time
- Year-end: close the books with a licensed auditor and file with DBD and the Revenue Department
Frequently asked questions
When are annual financial statements due in Thailand?
Statements must be audited by a licensed auditor and approved at the shareholders' meeting within 4 months of the fiscal year-end, then filed with the Department of Business Development within 1 month of that meeting. The corporate income tax return (PND 50) is due within 150 days of year-end. We build this calendar for you in advance.
What is PND 51 and when is it filed?
PND 51 is the half-year corporate income tax return. You estimate full-year profit and prepay half the tax, filed within 2 months after the first 6 months of the fiscal year. Underestimating beyond the allowed margin can trigger surcharges, so the estimate should be based on real figures.
When must a company register for VAT?
Once annual revenue from goods or services exceeds THB 1.8 million, the business must register for VAT within 30 days of crossing that threshold. Some businesses register earlier so corporate customers can claim input VAT; we help you decide which fits your model.
Which taxes are filed every month, and when?
Withholding tax returns (PND 1, 3 and 53) are due by the 7th of the following month. VAT (PP 30) and social security contributions are due by the 15th. E-filing usually receives an extended deadline. We remind you and prepare every return.
Can we switch accounting firms mid-year?
Yes. We collect filed tax reports, ledgers, the trial balance and supporting documents from your previous firm, verify opening balances, and take over without interrupting next month's filings.
What if we missed or filed a tax return late?
File as soon as possible, because penalties and surcharges grow over time. Send us what you have; we identify missing months, calculate what is owed and file the corrections.
Do you work with foreign-owned companies and foreign directors?
Yes. Our team works in English, prepares reports foreign management can read easily, and coordinates with our lawyers on work permits, contracts and foreign business rules.
What accounting is needed to close a Thai company?
Closing requires registering the dissolution, appointing a liquidator, preparing statements as of the dissolution date and completing tax filings before the liquidation is registered as complete. We handle both the accounting and the registration paperwork with our legal team.
Does every Thai company need an accountant?
Yes. Companies and partnerships must keep accounts prepared by a qualified bookkeeper and have annual statements audited by a licensed auditor.
When should I register for VAT?
When taxable revenue is expected to exceed THB 1.8 million a year, or earlier if your customers require VAT invoices. We can assess this for you.
Can you take over from my previous accountant?
Yes. We review past filings, flag gaps and plan corrections before taking over monthly work.
How much does bookkeeping cost?
It depends on transaction volume, payroll size and VAT status. Please ask our team for a quote via LINE @Thainotary or 094-8958999.
Do you work with companies outside Bangkok?
Yes. We have offices in Bangkok and Khon Kaen and work with clients nationwide, mostly online.
Can you help me open a company and get a work permit?
Yes. Our accounting, legal and virtual-office teams coordinate company setup, VAT registration and the documents needed for visa and work permit applications.
Talk to a team with 15+ years of experience
Send us the details through any channel. We review your documents and confirm the scope and fee before any work starts.