Everhour turns tracked billable work into invoices, while Thai VAT tax invoices require exact local fields.
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A Thailand invoice starts with the commercial job: bill a customer for goods, services, project work, or reimbursable costs in a format the buyer can review and pay. For VAT-registered businesses, that document is a VAT tax invoice, so the invoice must do more than state an amount due. It needs the correct tax wording, identifiers, buyer information, issue date, line details, and VAT presentation.
Use the invoice as a billing record and a tax record. Thailand uses VAT on supplies of goods, services, and imports. A person or entity that regularly supplies goods or provides services in Thailand is subject to VAT once annual turnover exceeds THB 1.8 million. The Revenue Department states 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," the issuer's name, address, and taxpayer identification number, plus the buyer's name and address. It also needs a serial number, issue date, description, type, category, quantity, and value of the goods or services, with the VAT amount separated from the value before tax.
A clean service line can read: "Website maintenance, May 2026, 10 hours, THB 25,000." The VAT line then shows 7% VAT separately, and the total combines the service value and VAT amount. 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.
The most common Thailand invoice error is treating a payment request like a full VAT tax invoice. A VAT registrant must issue a tax invoice and copy for every sale of goods or provision of services at the time VAT liability occurs, provide it to the customer, and keep the copy. A missing serial number, TIN, buyer address, or separated VAT amount creates a weak record.
Foreign-currency work needs extra care. If the VAT tax base is expressed in foreign currency, it must be converted to Thai currency using the Thai money received if sold in the same tax-liability month. Otherwise, use the Bank of Thailand average selling rate on the last working day of that month. Imports use the Customs Department rate.
A free invoice is enough for a single client bill, a simple service sale, or a draft that still needs review against Thai VAT requirements. It works best when you already know the buyer details, invoice language, Thai baht values, VAT treatment, and payment agreement. Thailand's statutory VAT tax-invoice particulars list the issue date but do not list a payment due date or payment terms.
A managed workflow matters when billable time, non-billable work, project rates, and expenses feed repeated invoices. Everhour supports billable and non-billable time through project billing status, task-level non-billable controls, custom task rates, member-rate exceptions, and admin reports. That structure keeps invoice amounts tied to approved work instead of rebuilt from notes, spreadsheets, or separate time logs.
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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Thailand uses value added tax as its indirect tax on goods, services, and imports. A business that regularly supplies goods or provides services in Thailand is subject to VAT once annual turnover exceeds THB 1.8 million. The Revenue Department states the current general VAT rate is 7%, with VAT shown separately on a full tax invoice.
A full Thai VAT tax invoice must show the words "tax invoice," issuer name, address, taxpayer identification number, buyer name and address, serial number, issue date, and line-item details. The description, type, category, quantity, and value of goods or services must be clear, and the VAT amount must be separated from the value before tax.
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. Foreign-currency tax bases must be converted to Thai baht under the Revenue Department rules.
Thailand's statutory VAT tax-invoice particulars list the issue date but do not list a payment due date or payment terms. Those terms are normally set by contract or commercial agreement. Include payment terms for client clarity, but keep them separate from the required VAT tax-invoice fields.
A VAT registrant creates risk by issuing a document that omits the separated VAT amount, serial number, issuer TIN, buyer details, or required tax-invoice wording. Another mistake is using foreign currency without the required Thai baht conversion. The invoice should read as a full VAT tax invoice, not only as a payment request.
Everhour lets admins set project billing status, mark specific tasks as non-billable, apply custom task rates, and use member-rate exceptions. Admin reports can show billable time, non-billable time, billable amount, and cost, so only chargeable work flows into the client billing review.
Everhour can turn tracked billable time and expenses into invoices, calculate amounts from rates and billable expenses, and exclude non-billable work. Invoices can be exported to QuickBooks Online, Xero, or FreshBooks as drafts, with invoice status, number, issue date, and amount synced back to Everhour.
Track billable and non-billable work before invoice day. Everhour keeps project billing rules, task rates, and admin reports connected, so Thailand client invoices start from cleaner billing data.
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