What Information to Include in Your Invoice

Carolyn Jul 11, 2026

Creating an invoice involves more than just listing the products or services you've provided. It's a critical business document that ensures you get paid while also serving as a legal record of your transaction. To create a comprehensive and professional invoice, you'll need to include a range of information. Let's delve into the details of what information is needed for an invoice.

What is an Invoice? Definition + Free Templates | QuickBooks
What is an Invoice? Definition + Free Templates | QuickBooks

An invoice typically includes both mandatory and optional information. The mandatory details are essential for the invoice's validity and legal standing, while optional details can enhance its professionalism and clarity. Let's explore these in detail.

Proforma Invoice Template Word & Excel
Proforma Invoice Template Word & Excel

Mandatory Information for an Invoice

Including the following details is crucial as they form the backbone of your invoice:

4 things a product invoice needs that a service invoice doesn't
4 things a product invoice needs that a service invoice doesn't

1. Invoice Header

The header should include your business name, address, phone number, email, and website. This helps your client identify who the invoice is from and how to contact you. Here's an example:

USA Tax Invoice Checklist: What to Include
USA Tax Invoice Checklist: What to Include

John Doe Consulting
123 Main Street, Suite 456
Anytown, Anystate 12345
Phone: (123) 456-7890
Email: info@johndoeconsulting.com
Website: www.johndoeconsulting.com

Invoice Details

2. Invoice Number

how to create an invoice
how to create an invoice

Assign a unique number to each invoice to help you track and manage them. This number should follow a consistent format, such as INV-001, INV-002, and so on.

3. Date of Issue

The date you created the invoice should be clearly stated. This is not necessarily the date the work was completed or the services were rendered.

Invoice Order Form
Invoice Order Form

Client Information

4. Client's Name and Address

Editable Invoice Template Word | Printable Business Invoice Form | Customer Receipt | Microsoft Invoice | Order Form PDF
Editable Invoice Template Word | Printable Business Invoice Form | Customer Receipt | Microsoft Invoice | Order Form PDF
an invoice form is shown with the company's name and address on it
an invoice form is shown with the company's name and address on it
Free Invoice Generator for US Medical Billing
Free Invoice Generator for US Medical Billing
Invoice, Quotation, Receipt and Statement Template Bundle | Customisable Canva template for Small Business Owners (A4)
Invoice, Quotation, Receipt and Statement Template Bundle | Customisable Canva template for Small Business Owners (A4)
Never Late Payments Again: Ultimate Invoice Email Sample
Never Late Payments Again: Ultimate Invoice Email Sample
50+ Invoice Templates: Commercial Invoice ǀ Tax Forms ǀ Invoice Management
50+ Invoice Templates: Commercial Invoice ǀ Tax Forms ǀ Invoice Management
Chic Pink Invoice Template for Makeup Artists
Chic Pink Invoice Template for Makeup Artists
excelinvoicetemplates.com - Domain Name For Sale | Dan.com
excelinvoicetemplates.com - Domain Name For Sale | Dan.com
Invoice Template | Business Billing | Minimalistic | Canva Editable
Invoice Template | Business Billing | Minimalistic | Canva Editable
Free Service Invoice from Formville
Free Service Invoice from Formville
Editable Invoice Template with Shipping, Excel (Instant Download)
Editable Invoice Template with Shipping, Excel (Instant Download)
an invoice form is shown with two lines
an invoice form is shown with two lines
Invoice Template For Small Business, Blank Billing Template, Small Business Services Invoice, Downloadable, Editable Invoice, Canva
Invoice Template For Small Business, Blank Billing Template, Small Business Services Invoice, Downloadable, Editable Invoice, Canva
Invoice Template for Mac Online
Invoice Template for Mac Online
Editable Invoice Template: Printable Business Form | A4
Editable Invoice Template: Printable Business Form | A4
Proforma Invoice Template Excel | Professional Estimate Invoice | Editable Billing Spreadsheet
Proforma Invoice Template Excel | Professional Estimate Invoice | Editable Billing Spreadsheet
How to write an invoice
How to write an invoice
What’s Included in the Contractor Invoice Template
What’s Included in the Contractor Invoice Template
Modern Green Invoice Design Template | Accounting Invoice | Finance Invoice |
Modern Green Invoice Design Template | Accounting Invoice | Finance Invoice |
an invoice form with coffee cups on it, and the receipt below it
an invoice form with coffee cups on it, and the receipt below it

Include the client's full name and address to ensure the invoice reaches the right person and can be matched with the correct purchase order, if applicable.

5. Purchase Order Number (if applicable)

If your client has provided a purchase order number, include it on the invoice to help them match it with their records.

Optional but Recommended Information for an Invoice

Including the following details can make your invoice more professional and easier to understand:

Invoice Breakdown

6. Detailed Description of Services or Products

Provide a clear description of what you're invoicing for. This could include a list of products, services, or a brief project summary.

7. Quantity, Unit Price, and Tax (if applicable)

Break down the total cost into quantities, unit prices, and any applicable taxes. This makes it easier for your client to understand how the total was calculated.

Payment Terms and Details

8. Payment Terms

Specify your payment terms, such as 'Net 30' (payment due within 30 days) or 'Due on receipt'.

9. Payment Methods

Include the payment methods you accept, such as bank transfer, credit card, or PayPal. Providing your bank details or a PayPal link can make it easier for your client to pay.

Finally, always proofread your invoice for any errors before sending it. A well-crafted, error-free invoice not only helps ensure timely payment but also reflects positively on your professionalism and attention to detail.