A complete accounting service in Thailand covers monthly bookkeeping, bank reconciliation, VAT return filing (PP.30), withholding tax filing (PND.3, PND.53), , annual financial statement preparation, corporate income tax returns (PND.50 and PND.51), and DBD annual filing. Simple Outsource delivers all of this as a managed monthly service, with English-language financial reports included.

Outsourcing accounting in Thailand gives you a full team — bookkeeper, tax accountant, and compliance specialist — for less than the cost of a single in-house hire. You get consistent quality, no staff turnover risk, and continuity across tax years. Simple Outsource also keeps up with changes in Revenue Department regulations so you don’t have to. For most SMEs and foreign-owned businesses, outsourcing is both more cost-effective and more reliable than in-house accounting.

Businesses with annual revenue exceeding THB 1.8 million must register for VAT in Thailand. Once registered, you charge 7% VAT on applicable sales, claim input VAT credits on qualifying purchases, and file a monthly PP.30 return with the Revenue Department by the 15th of the following month. Simple Outsource manages VAT registration, tracks input and output VAT, and files your PP.30 returns every month — on time, every time.

Withholding tax requires businesses to deduct a percentage of payments made to Thai vendors, contractors, and service providers and remit it directly to the Revenue Department. Rates range from 1% to 15% depending on the payment type. PND.3 (third-party withholding – individual, freelancer who are not employee) and PND.53 (third-party withholding – juristic person) must be filed monthly. Simple Outsource calculates, deducts, and files all withholding tax as part of the monthly accounting service.

Thai law requires businesses to keep accounting records — including invoices, receipts, bank statements, and ledgers — for a minimum of 5 years. Records must support every entry in your financial statements and be available for Revenue Department inspection. Simple Outsource maintains a complete digital accounting archive for every client, organised by month and tax year, accessible on request.

Every Thai limited company must prepare annual financial statements audited by a licensed Thai CPA and submit them to the Revenue Department (via PND.50, due within 150 days of the financial year end) and the DBD (due within 5 months of the financial year end). Simple Outsource prepares your annual accounts, coordinates with an independent auditor, and manages both submissions — so you meet every deadline without last-minute scrambling.

Yes. Simple Outsource specialises in accounting for foreign-owned businesses in Thailand, including companies under the Foreign Business Act, US-Thai Treaty of Amity entities, and BOI-promoted companies. We provide English-language reports, handle intercompany transactions, and understand the specific compliance requirements that differ for foreign-majority entities. All client communication is in English.

If your company receives a Revenue Department query (e.g., regarding VAT or missing filings), Simple Outsource can assist with documentation and department coordination. This support is an add-on service, with fees quoted case-by-case based on complexity.

Switching accounting firms in Thailand is straightforward with Simple Outsource. We contact your previous provider for the accounting handover package (ledgers, reconciliation records, filing history), identify any gaps or errors, and reconcile the books before taking over the monthly cycle. Most transitions are completed within two to four weeks. We handle the migration — you don’t have to manage it.

Simple Outsource charges a fixed monthly fee based on your transaction volume. There are no hidden fees for standard filings — VAT, withholding tax and annual returns are all included. We provide a clear, itemised quote at the first consultation. Most SMEs find outsourced accounting costs less than 30% of the equivalent in-house hire — with more consistent quality.