What is an invoice?
An invoice is a commercial document issued by a seller to a buyer that lists the products or services provided, their quantities, prices, and payment terms. It serves as a formal request for payment and a legal record of the transaction.
What should an invoice include?
A professional invoice should include all of the following:
- Your business name, address, and contact information
- Your tax ID (EIN, GSTIN, VAT number, etc.) if applicable
- A unique invoice number (sequential)
- Invoice date and due date
- Client's name and billing address
- Itemized list of products or services with descriptions
- Quantity and unit price for each item
- Subtotal, tax, discounts, and grand total
- Payment terms (Net 15, Net 30, Due on Receipt)
- Accepted payment methods and account details
- Notes or thank-you message
Why use a free invoice generator?
Free invoice generators like InvoiceGen save hours of work compared to using Word, Excel, or paid software. You get:
- Pre-built professional templates (no design work)
- Automatic calculations for tax, discounts, and totals
- Instant PDF download — ready to email or print
- Multi-currency and country-specific tax compliance
- No signup, no monthly fees, no limits
Step-by-Step Guide
- 1
Open the free invoice generator
Go to InvoiceGen and start with a blank invoice. No signup required — your data stays in your browser.
- 2
Enter your business details
Add your business name, address, email, phone, and tax ID. Upload your logo to brand the invoice.
- 3
Add client information
Enter the client's name and billing address. You can save clients to reuse for future invoices.
- 4
List your items or services
Add line items with descriptions, quantities, and rates. Tax, discounts, and totals calculate automatically.
- 5
Choose a template and customize
Pick from 10 professional templates. Customize colors, fonts, add a digital signature, and include payment QR codes.
- 6
Download or email the invoice
Click Download PDF for a professional invoice file, or email it directly to your client with one click.