Thai Tax Matters,
Handled with Care

It depends on income sources and residency duration. A foreign individual who spends 180 days or more in Thailand in a calendar year is considered a Thai tax resident and may be assessable on income arising in Thailand and on foreign-sourced income remitted to Thailand in the same tax year. The rules changed in 2024 regarding remitted foreign income — if you have income from outside Thailand, it is worth reviewing your position carefully.

For personal returns: employment contracts or payslips from Thai employers, withholding tax certificates (Phor Ngor Dor 50 Bis), bank statements showing remittances from abroad if applicable, and any prior-year returns already lodged. For corporate reviews: your draft annual accounts, prior-year CIT return, and a list of related-party transactions or management fee arrangements. We will confirm what else we need after an initial conversation.

Mandatory VAT registration is required once annual taxable revenues exceed ฿1.8 million. Businesses below this threshold may register voluntarily, which sometimes makes sense for input tax recovery reasons. Whether voluntary registration is worth pursuing depends on the nature of your supplies, your customer base, and whether your main costs carry VAT. We can walk through the practical calculation with you.

For a straightforward foreign-resident return with Thai employment income and standard deductions, the process from document receipt to electronic filing is typically one to two weeks. More complex situations — multiple income types, treaty considerations, late or amended prior years — take longer and we will indicate a timeline at the outset once we have seen your documents.

Yes. Client matters and documents are held in confidence. We do not discuss client affairs with third parties except as required in the ordinary course of preparing and lodging returns with the Revenue Department, or as you expressly authorise. Our engagement letters set out these obligations in full.

Late and amended returns are a regular part of our practice. The Revenue Department has processes for voluntary disclosure, and the outcome depends on the circumstances. We will review what years are in scope, what records are available, and advise on how to address the position in a considered way. It is generally preferable to address gaps before they are raised by the Department.