What is an invoice?
An invoice is a document you send to your client requesting payment for goods or services you have provided. A clear invoice helps you get paid faster and keeps your records organized.
Good to know
An invoice is not a receipt. You send an invoice before payment; a receipt is issued after payment is made.
Required invoice fields
Most professional invoices include the following core information.
Your business details
Client details
Invoice number
Issue date
Line items and descriptions
Totals and payment due
How to create an invoice step by step
1
Add business and client details
2
Add line items
3
Review totals and terms
4
Download or print
How to number invoices
- Start with a simple sequence like INV-001.
- Never reuse a number, even if an invoice is voided.
- Keep numbering consistent for bookkeeping.
Invoice and due dates
- The issue date is when the invoice is created.
- The due date is when payment is expected.
- Net 7, Net 14, and Net 30 are common terms.
Common mistakes to avoid
- Missing invoice number or using duplicate numbers.
- Leaving out client details or business details.
- Unclear descriptions or missing quantities.
- Forgetting due date or payment terms.
- Incorrect totals or missing taxes.
- Not keeping a copy of the invoice for your records.
Invoice checklist
Disclaimer
This guide provides general billing guidance only and is not tax or legal advice. Consult a qualified professional for advice specific to your situation.
Written by
InvoiceMaker.top editorial
Practical billing guidance for small businesses.
Editorial review
Reviewed for clarity and updated regularly.
Last reviewed
May 2026