Thai VAT tax invoices require specific fields and formatting. Everhour keeps the billing records behind each invoice organized.
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A VAT-registered seller in Thailand issues a VAT tax invoice for a sale of goods or provision of services at the time VAT liability occurs. The invoice copy must be kept. Thailand uses value added tax on supplies of goods, services, and imports, and VAT registration generally applies when annual turnover exceeds THB 1.8 million.
A full Thai VAT tax invoice needs the words "tax invoice," issuer name, issuer address, issuer taxpayer identification number, buyer name, buyer address, serial number, issue date, and line-item details. The Revenue Department also requires description, type, category, quantity, and value of goods or services, plus VAT shown separately from the value.
Each invoice line should identify the product or service clearly enough for the buyer and tax record. Use Thai baht amounts unless the VAT registrant has approval from the Director-General to use another currency. A service line can show the service period, quantity, unit price, total value before VAT, and the VAT amount calculated from the VAT tax base.
For example, a consulting service line can show "Project implementation services, May 2026," quantity of 10 hours, unit price of THB 2,000, value of THB 20,000, and VAT of THB 1,400 at the current general VAT rate of 7%. The total due then combines the pre-VAT value and the separated VAT amount.
Thai tax-invoice particulars must use Thai language, Thai currency, and Thai or Arabic numerals unless approval allows a foreign language or currency. A foreign-currency contract still needs proper Thai VAT handling. If the VAT tax base is expressed in foreign currency, it must be converted to Thai baht under the Revenue Department's conversion rules.
Use the Thai money received if the foreign currency is 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. This conversion choice affects the VAT base, so record the exchange-rate source with the invoice file.
A free invoice is enough for a one-off sale, a small manual record, or a quick client document where you already know the line items and VAT treatment. It works best when the invoice does not need project history, approval notes, billable-hour backup, or recurring reporting.
A managed workflow becomes useful when billable time, expenses, project budgets, and invoice records need to stay connected. Everhour Reporting turns logged time, budgets, costs, and project data into customizable reports with 45+ columns, grouping, filters, exports, and scheduled email delivery, so invoice totals can be checked against the work record before billing.
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 VAT as its indirect tax on supplies of goods, 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. VAT-registered businesses issue VAT tax invoices, and the Revenue Department states that the current general VAT rate is 7%.
A full Thai VAT tax invoice must show the words "tax invoice," issuer name, issuer address, issuer taxpayer identification number, buyer name, buyer address, serial number, issue date, line-item description, type, category, quantity, and value. It must also show the VAT amount separately from the value of the goods or services.
Yes. A full Thai VAT tax invoice must clearly separate the VAT amount from the value of the goods or services. Do not bury VAT inside a single total. Show the value before VAT, calculate VAT from the VAT tax base using the applicable VAT rate, and then show the final invoice total.
Thai tax-invoice particulars must be in Thai currency unless the VAT registrant has approval from the Director-General to use a foreign currency. If the VAT tax base is expressed in foreign currency, convert it to Thai baht using the Revenue Department's stated rules, including the Bank of Thailand average selling rate when applicable.
Thailand's statutory VAT tax-invoice particulars list the issue date, but they do not list a payment due date or payment terms. Those terms are normally set by agreement. Add a due date when the contract or client workflow needs one, but do not treat it as a listed VAT tax-invoice field.
Everhour Reporting lets teams review logged time, budgets, costs, billable time, invoice status, and project details in customizable reports with 45+ columns. Reports can be grouped, filtered, exported as CSV, Excel/XLSX, or PDF, and scheduled by email for recurring billing review.
Everhour Billing & Invoicing converts tracked billable time and expenses into client invoices. Users can select uninvoiced time and expenses, preview the breakdown, generate an invoice, and export it to QuickBooks Online, Xero, or FreshBooks as a draft for accounting follow-up.
Turn invoice review into a repeatable reporting workflow. Everhour connects logged time, project budgets, invoice status, exports, and scheduled reports, giving teams cleaner billing records before each client invoice.
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