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INVOICING

What Is a Purchase Order Number? How Freelancers and Service Professionals Can Use POs to Streamline Invoicing and Payments

Learn how to use purchase order numbers to simplify invoicing and payments for your clients and boost your bottom line. Discover practical tips and tools to get paid faster and reduce financial stress.

June 2026·7 min read

You've just finished a complex project for a new client, and you're expecting a payment of $5,000. But when you send the invoice, the client responds with a request to 'just give them a quote.' You're left wondering if they're going to pay you at all, and how you can get them to commit to the payment. This is where a purchase order number can be a game-changer. In this post, we'll explore what a purchase order number is, and how freelancers and service professionals can use them to simplify invoicing and payments.

Why this keeps happening

Many freelancers and service professionals struggle with delayed or non-payment from clients, often due to a lack of clear communication and a streamlined invoicing process. Without a purchase order number, clients may feel uncertain about their financial obligations, and may hesitate to pay. Additionally, freelancers may have to spend valuable time chasing down payments and resolving disputes, rather than focusing on their work.

Real example

Sarah, a freelance graphic designer, recently landed a contract with a new client to design a logo and branding materials. However, when she sent the invoice, the client responded by asking her to 'just send over some quotes.' Sarah was left wondering if the client was going to pay her at all, and how she could get them to commit to the payment. This experience was frustrating and costly, and it highlighted the importance of using purchase order numbers to simplify invoicing and payments.

The habits that fix this permanently

These are the non-negotiables for getting paid reliably in your profession:

Include a purchase order number on your invoice to clearly communicate the client's financial obligations
Use a purchase order number to create a contract that outlines the scope of work and payment terms
Automate the invoicing process by using a tool that generates purchase order numbers and sends invoices to clients
Use a purchase order number to track client payments and ensure timely receipt of funds
Clearly communicate the purchase order number to clients to avoid confusion and misunderstandings
Use a purchase order number to create a payment schedule that outlines the due date and payment terms

How to implement this step by step

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Step 1: Create a Purchase Order Number and Include it on Your Invoice

When creating an invoice, include a unique purchase order number to clearly communicate the client's financial obligations. This number should be used consistently throughout the project to avoid confusion. For example, if Sarah is working on a project for a client, she might include a purchase order number like 'PO12345' on her invoice. This number serves as a reference point for the client and helps to ensure timely payment.

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Step 2: Use a Purchase Order Number to Create a Contract

A contract is a crucial document that outlines the scope of work, payment terms, and other important details. Using a purchase order number to create a contract can help to simplify the process and ensure that all parties are on the same page. For example, if Marcus is working on a project for a client, he might use a purchase order number like 'PO98765' to create a contract that outlines the scope of work and payment terms.

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Step 3: Automate the Invoicing Process

Automating the invoicing process can save time and reduce errors. Many tools, such as Becflow, allow you to generate purchase order numbers and send invoices to clients automatically. For example, if Emily is working on a project for a client, she might use Becflow to generate a purchase order number and send an invoice to the client automatically.

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Step 4: Track Client Payments

Tracking client payments is crucial to ensure timely receipt of funds. Using a purchase order number to track client payments can help to simplify the process and reduce errors. For example, if David is working on a project for a client, he might use a tool like Becflow to track client payments and ensure timely receipt of funds.

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Step 5: Clearly Communicate the Purchase Order Number

Clearly communicating the purchase order number to clients is crucial to avoid confusion and misunderstandings. Using a purchase order number on all communications, including emails and invoices, can help to ensure that clients understand their financial obligations. For example, if Rachel is working on a project for a client, she might include the purchase order number on all communications, including emails and invoices.

The Becflow solution

Becflow is a powerful tool that helps freelancers and service professionals streamline invoicing and payments. With Becflow, you can generate purchase order numbers, create contracts, automate the invoicing process, track client payments, and clearly communicate the purchase order number to clients. Sign up for a free trial today and start simplifying your invoicing and payment process!

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