When must a business register for VAT in Thailand?
Short answer
Registration becomes mandatory once turnover exceeds the threshold set under the Revenue Code, and some businesses register voluntarily before that to recover input tax. Because the threshold and the procedure are set by the Revenue Department, confirm the current figure before deciding.
Voluntary registration is not automatically beneficial: it brings monthly filings, invoice formalities and possible premises inspection.
Certain activities are exempt or zero-rated, which changes the analysis entirely, so classify the activity before looking at the turnover number.
Reviewed as of 2026-08-04. General guidance only, not case-specific advice and not a guarantee of outcome. Government fees, conditions and processing times are set by the responsible authority and can change. This site does not publish prices — please ask our staff.
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