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Sales Order vs. Invoice: What’s the Difference in 2025?

In this article, we will explore the main differences between an invoice and a sales order. Read on to learn more.

sales order vs invoice

What Is a Sales Order?

A sales order is a document created by a seller to confirm the details of a customer's purchase, like the products, quantities, and prices. It helps both parties stay on the same page and track the order process.

Example: A customer orders a PlayStation 5 and two DualSense controllers from an electronics store, and the store generates a sales order listing the items, quantities, and total price. This document ensures both the store and customer agree on what’s being purchased.

invoice vs sales order

Unique Characteristics of a Sales Order

Here are some of the distinct qualities of a sales order:

1. Confirms Customer Orders

A sales order is issued to confirm the details of a customer's purchase, including items, quantities, and prices. It ensures both parties agree on the terms before fulfillment.

2. Serves as an Internal Fulfillment Guide

Sales orders act as a guide for the business to process and complete the customer's request. It helps coordinate inventory, production, or service delivery.

3. Reduces Errors in Order Processing

By specifying exact details, sales orders minimize misunderstandings and mistakes in fulfilling the customer's request. This ensures accuracy in delivering the right products or services.

4. Facilitates Order Tracking

Sales orders provide a unique reference for tracking the progress of an order. Both businesses and customers can use it to monitor the status from processing to delivery.

5. Forms the Basis for Invoicing

Sales orders often serve as the foundation for creating an invoice after fulfillment. This ensures consistency in details between the order and the billing process.

sales order vs sales invoice

What is an Invoice? 

An invoice is a document sent by a seller to request payment from a customer for goods or services provided. It lists the items, quantities, prices, and payment terms, serving as a formal billing statement.

Example: A graphic design agency receives an invoice for 10 Adobe Creative Cloud licenses at $55 each, totaling $550. The invoice includes payment instructions and is due within 30 days.

Unique Characteristics of an Invoice

Here are some of the distinct qualities of an invoice:

1. Requests Payment for Delivered Goods or Services

An invoice order is a formal document sent to the customer to request payment for goods or services already provided. It includes payment terms and instructions to facilitate timely collection.

2. Serves as a Financial Record

Invoice orders act as official records for both the seller and buyer, detailing the transaction's financial specifics. They are essential for bookkeeping and tax reporting.

3. Ensures Clarity in Payment Details

Invoices include precise information about the total amount due, payment methods, and deadlines. This helps avoid confusion and ensures smooth payment processing.

4. Facilitates Cash Flow Management

Businesses use invoices to track outstanding payments and plan their finances effectively. It helps them maintain steady cash flow and manage accounts receivable.

5. Provides Legal Documentation

Invoice orders serve as proof of a financial agreement between the seller and buyer. In case of disputes, they act as legal evidence to resolve issues.

Sales Order vs. Invoice: Are They the Same?

A sales order and an invoice may seem similar but they serve different purposes . We will explore these differences below.

Purpose

  • Sales Order: The purpose of a sales order is to confirm the details of the sale, including products or services, quantities, and agreed prices, before payment is made.
  • Invoice: An invoice, on the other hand, is issued prior to the provision of goods or services and is used to request the customer to pay for those items after they have been provided.

Timing

  • Sales Order: A sales order is generated before the payment is processed, acting as a confirmation of the transaction.
  • Invoice: An invoice is sent after the transaction is complete and serves as a formal request for payment.

Content

  • Sales Order: A sales order includes details of the products/services being ordered, along with quantities, prices, and terms, but no payment has been received yet.
  • Invoice: An invoice lists the same details but also includes payment instructions, a due date, and reflects that payment is expected.

Role in the Process

  • Sales Order: A sales order primarily helps businesses track and fulfill customer orders, ensuring the right items are shipped or delivered.
  • Invoice: An invoice is part of the financial process, ensuring that the business gets paid for the products or services provided.

We hope that you now have a better understanding of the difference between a sales order and an invoice. If you enjoyed this article, you might also like our article on manual invoice or our article on statement vs. invoice.