Thailand VAT invoices require precise fields and Thai baht values. Everhour keeps billing rates tied to tracked work.
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A Thai invoice needs enough detail for the buyer to approve payment and for a VAT-registered seller to keep a compliant tax record. For VAT registrants, the Revenue Department requires a tax invoice and copy for every sale of goods or provision of services at the time VAT liability occurs. The seller must provide it to the customer and keep the copy.
Start with the billing party, buyer, invoice number, issue date, and description of the goods or services. Add quantity, value, VAT, and the total amount payable. Thailand's statutory VAT tax-invoice particulars list the issue date, but they do not list payment due date or payment terms. Put payment timing in the agreement or commercial terms.
Thailand uses VAT on the supply of goods, provision of services, and imports. A person or entity that regularly supplies goods or provides services in Thailand is subject to VAT when annual turnover exceeds THB 1.8 million. The Revenue Department states that the current general VAT rate is 7%, while the Revenue Code sets a 10% rate that may be reduced by Royal Decree.
A full Thai VAT tax invoice must show the words "tax invoice," issuer name, issuer address, issuer tax ID, buyer name and address, serial number, issue date, and a description, type, category, quantity, and value of goods or services. Show the VAT amount separately from the value. The issuer's taxpayer identification number is a required tax-invoice field.
Tax-invoice particulars must be in Thai language, Thai currency, and Thai or Arabic numerals unless the VAT registrant has approval from the Director-General to use a foreign language or currency. This matters when a foreign client wants an invoice in English, USD, or another currency. Keep the Thai version and Thai baht values aligned with the tax record.
Foreign-currency billing needs a Thai baht conversion for the VAT tax base. If the money is received in the same tax-liability month, use the Thai money received. Otherwise, use the Bank of Thailand average selling rate on the last working day of that month. Imports use the Customs Department rate. Record the conversion source so the invoice total can be traced later.
A one-off invoice is enough when you have a single client, fixed work description, agreed terms, and a straightforward VAT line. It gives you a clean document to send and archive. It stops being enough when billable hours, rates, expenses, taxes, discounts, and client-specific terms change across projects or people.
Everhour separates internal cost rates from client-facing billable rates, supports default per-person rates with per-project overrides, and preserves dated rate history. That matters when Thai invoices come from tracked work rather than manual totals. The rate record can feed billing decisions before invoice generation, while the invoice itself still needs the required Thai VAT fields and language and currency treatment.
This content is for general information only, may not be fully up to date, and is provided without any warranty or liability.
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A VAT-registered seller must issue a tax invoice and copy for every sale of goods or provision of services at the time VAT liability occurs. A non-VAT invoice can still request payment commercially, but it does not replace the VAT tax invoice requirements that apply to a VAT registrant in Thailand.
Check the words "tax invoice," issuer name, issuer address, issuer tax ID, buyer name and address, serial number, issue date, line-item description, type, category, quantity, value, and separately stated VAT. The issuer's taxpayer identification number is required. Missing buyer details or a combined VAT total creates avoidable approval and tax-record problems.
Thai tax-invoice particulars must be in Thai language, Thai currency, and Thai or Arabic numerals unless the VAT registrant has approval from the Director-General to use a foreign language or currency. A commercial copy can help a foreign client read the charge, but the compliant tax invoice still needs the approved language and currency treatment.
The Revenue Department states that the current general VAT rate is 7%. The Revenue Code sets a 10% rate that may be reduced by Royal Decree, so cite the current Revenue Department rate when preparing the invoice. Show the VAT amount separately from the value of the goods or services.
Thailand's statutory VAT tax-invoice particulars list the issue date, but they do not list payment due date or payment terms. Add due dates, late-payment terms, bank details, and purchase-order references as commercial terms agreed with the buyer. Those terms support collection, but they are separate from the VAT invoice-content rule.
Everhour separates cost rates from billable rates, with default per-person rates and per-project overrides. A team can price work by project, member, or custom task rate, then preserve dated rate changes so older billing reports keep the rates that applied when the work was performed.
Set project, member, or task rates once, then keep billable work tied to dated rate history. Everhour gives invoice-ready billing records without rebuilding totals by hand.
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