What Is an Invoice?
An invoice is a document that requests payment for goods or services already delivered or agreed. It records who sold what, how much is owed, when payment is due, and how to pay. Unlike a quote or estimate, an invoice is a formal payment request.
Why businesses send invoices
Invoices create a clear paper trail for accounting, tax reporting, and cash flow tracking. They tell your customer exactly what they owe and give finance teams the details they need to approve payment. For freelancers and agencies, a professional invoice also signals that you run a serious business.
Invoice vs quote, estimate, and receipt
A quote or estimate proposes a price before work starts. An invoice requests payment after delivery or at a billing milestone. A receipt confirms payment was received. Sending the right document at the right stage prevents confusion and speeds up approval.
What every invoice should include
At minimum, include the word Invoice, a unique invoice number, invoice date, due date, your business name and contact details, the customer legal name and address, itemized line items with amounts, subtotal, tax shown separately where applicable, total due, currency, and payment instructions.
Create your first invoice online
You do not need Word or Excel. Open the free invoice generator, add your logo and business details, enter line items, apply tax if needed, and download a PDF you can email immediately. No account is required to get started.
How to create your invoice
- 1. Add business details
Enter your company name, address, and logo. These appear at the top of the invoice.
- 2. Add customer and line items
Describe what you sold or the what is an invoice? services provided. Include quantity, rate, and tax where applicable.
- 3. Download your PDF
Review the preview, then download a print-ready PDF to email or send to your customer.
Common mistakes to avoid
- Missing invoice number or date, which makes tracking payments harder.
- Unclear line item descriptions that do not match what the customer expected.
- Forgetting payment terms or bank details, which delays payment.
- Incorrect tax treatment for your customer location or service type.
Frequently asked questions
- Is an invoice a legal document?
- An invoice is a commercial record of a transaction and payment request. Legal requirements for content vary by country and tax status. Always confirm rules for your jurisdiction.
- When should I send an invoice?
- Send an invoice when work is complete, goods are shipped, or a billing milestone is reached according to your contract or payment terms.
- Can I invoice without a company?
- Yes. Sole traders and freelancers invoice under their own name or trading name with the contact and tax details required locally.
Create free invoice
Create a professional document online and download it as a PDF. No account required to get started.
Create free invoice