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Free invoice template (Excel + PDF)
An invoice is a commercial document a seller issues to request payment for delivered goods or services. This page offers a free invoice template as both an editable Excel file and a PDF — no email required. It includes item, quantity, price, total, and payment-term fields, suited to freelancers and businesses that want to bill systematically.
Thai SME owners and Thai accountantsLast updated 2026-07-21
Download the template
Free download, no email required
Example document
Item, quantity, price, and total fields with formulas
Payment-term and due-date fields
Works for both freelancers and businesses billing per transaction
Includes a filled example as a guide
How to write a complete invoice
1.Fill in seller and buyer details
State the shop or seller, address, contact, and the customer receiving the invoice, so the customer knows who is billing and to whom. For a juristic entity, include the tax ID.
2.List items or services and amounts
List each item with quantity and unit price, letting the Excel formula total each line and the grand total. State clearly whether VAT is included. An invoice is not a tax document, but the amounts should be clear to avoid confusion.
3.State terms and due date
Spell out payment terms such as within 15 or 30 days, plus the payment channel and account number. Stating a due date makes it easier to track outstanding balances and reduces late payment.
4.Add document number and date
Finish with a unique invoice number and issue date, to reference when the customer pays and when the receipt or tax invoice follows. Systematic numbering makes filing and traceability easy.
What is the difference between an invoice and a billing note?
An invoice is typically issued per sale or for smaller amounts, while a billing note bundles several items or delivery notes over a period into one collected amount — useful for frequent buyers on a credit cycle. Both request payment and are not tax documents.
Does an invoice need to separate VAT?
An invoice is not a tax document, so separating VAT is not mandatory. Sellers often show a VAT-inclusive total and issue the actual tax invoice on payment. If you are VAT-registered, state clearly whether the price includes tax.
Can a freelancer issue an invoice?
Yes. A freelancer can issue an invoice to bill for work — no company required. State the scope, amount, and payment terms clearly so both sides agree and it works as evidence.
What should I do if a customer does not pay an invoice?
State the due date and terms clearly on the invoice from the start, follow up on outstanding balances each cycle, and issue a billing note at collection time. For large amounts with ongoing issues, consider consulting a legal expert on appropriate collection steps.
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