All You Ever Need to Know About Purchase Orders

Using purchase orders can help an organization regain control of its spending, streamline the process of acquiring goods and services, and create a proactive spend culture that improves the bottom line.

An efficient purchase order (PO) system also allows team members (like finance teams) to keep tabs on pending and future purchases before any additional money is committed.

In this blog, we explain what purchase orders are, how they work, and how to create an efficient PO system that works perfectly for your needs.

What is a purchase order?

It seems logical to start this guide off by answering a simple question: what is a purchase order? Here’s what you need to know:

Purchase orders (POs) are documents sent from a buyer to a supplier with a request for an order. Each PO will outline the specifics of a purchase request, including an order description, quantity of items, and the agreed-upon price and payment terms. They also identify the purchase order (PO) number.

When a seller – like a supplier or a vendor – accepts a purchase order, a legally-binding contract is formed between the two parties. 

Although purchase orders add a few extra steps to the purchasing process, they help to ensure a smooth transaction between the buyer and the seller. They also help reduce the risk of fulfilling an incomplete or incorrect order. In short, these documents are an opportunity for the buyer to clearly and explicitly communicate their request to the seller.

On top of this, if the buyer refuses payment upon delivery of a good or service, the seller is protected because the purchase order acts as a binding contract between both parties.

Lastly, some commercial lenders will use purchase orders as a reference to provide financial assistance to an organization.

How do purchase orders work?

In order to streamline the purchase of goods and services that an organization requires to operate successfully, a purchase order must follow a strict step-by-step procedure known as the purchase order process.

In this section, we’ll explain who and what is involved in this process within an organization.

Understanding the steps in the purchase order process

The purchase order process is the journey a PO takes from creation through to closure and everything in between. Depending on the nature of a company (size, industry, human resources, organizational structure, the goods and services it is acquiring, etc), the purchase order process can also be modified to include additional necessary steps like quality checks, budget approval, contractual approval, and more.

Here are the steps in the purchase order process:

  1. Create a PO
  2. Approve a PO
  3. Send a PO to the vendor
  4. PO Received (Binding Contract)
  5. Receipt of Goods or Services
  6. Invoicing
  7. 3-Way Matching
  8. Authorize and Arrange Payment
  9. PO Closure

Let’s break these steps down in detail.

1. PO creation

When a company (i.e. the buyer) decides to buy a product or service, it creates a purchase order that details what is being requested from the seller, along with pricing and payment terms.

2. PO approval

Before a PO can be sent, it needs to be approved. A company’s approval process will dictate who, within the company, is required to approve a PO before it is sent to the supplier.Modern companies tend to facilitate this step by requiring (and approving) purchase requisition first. This process eliminates the need for PO approval, and streamlines the process for the purchasing team.

3. PO sent to a vendor

Once approved, the PO is sent to the seller. For software companies that buy online, this step might seem redundant. However, POs also serves as an internal document that streamlines reconciliation for the accounting team once the invoice is received. So while it isn’t mandatory to send the PO to the vendor, it’s still good practice to keep it for internal purposes.

4. PO received [binding contract]

The vendor/seller receives the order. Once the vendor tells the company that it can fill the order, the purchase order becomes a binding contract. Purchase order management software tools like Procurify offer to send POs through an online procurement software, which makes it easier to track that emails with POs were both sent by the company and received by the vendor.

5. Receipt of goods or services

The seller ships the order, attaching the PO number to the packing list. This helps the buyer know which order has arrived.

6. Invoicing

The seller also invoices for the order, making sure to include the PO number to the invoice.

7. Three-way matching

The company uses 3-way matching to confirm that the PO number and order details (quantities and prices of the goods and services ordered) match up on the Purchase Order, Invoice, and Packing Slip.

8. Authorize and arrange payment

Provided everything checks out and the company is happy with the order, the company approves the invoice and arranges payment to the seller (as per the agreed-upon payment terms).

9. Purchase order closure

When the above steps are completed, mark the PO as closed.

Who issues a purchase order?

The buyer is responsible for creating and issuing a purchase order. In larger companies, a procurement or purchasing department will typically issue the purchase order. In smaller companies, the business owner, operations manager, or financial manager may issue the purchase order.

It’s also important to note that the role of creating and issuing a purchase order can be designated to a central purchaser for a specific team. For example, in a software company, an office manager can create purchase orders.

Ultimately, who issues the purchase order comes down to how a company decides to set up its purchasing process.

Who approves a PO?

One or several people can approve purchase orders depending on the purchasing process that’s in place. In larger companies that have defined purchasing processes, purchase order approvals are typically structured around locations and departments, with specific dollar thresholds attached.

For example, if a digital marketing manager in a software company is requesting a new ad budget, the purchase order approval routing could include a marketing director and a CFO (or another role in charge of the company budget).

In smaller companies, CFO or CEO could be the final approval for any kind of spend, which can result in approval bottlenecks.

What does a purchase order contain?

Generally speaking, here’s what a purchase order contains:

  • Product(s) or service(s) being purchased
  • Quantity purchased
  • Specific brand names, SKUs, or model numbers
  • Price per unit
  • Delivery date
  • Delivery location
  • Company billing address
  • Agreed payment terms (e.g. on delivery, in 30 days, etc.)

These items can be a strict requirement or an option, depending on an organization’s procurement and purchasing workflows. In addition, purchase orders can be customized to suit the needs of a business, so this list is not exhaustive.

With purchase order software like Procurify, you can add account codes in the requisition phase. Adding this information will streamline the reconciliation process and make it easier to transfer information to your accounting system.

What do purchase orders look like?

Companies typically have a standardized PO document with stock information to ensure consistency.

Here is a purchase order example that shows you what a purchase order looks like:


Purchase order example

Procurify’s purchase order example


Purchase order vs invoice: what’s the difference?

If you’re new to using POs, you might be wondering: how are they different from an invoice? Well, to start, different team members create these documents.

Buyers create the PO and send them to vendors. In turn, this prompts the vendor to accept the PO and send an invoice back to the buyer.

It’s common for the PO and the invoice to contain similar details. The invoice generally references the PO number, along with an invoice number, to confirm that both documents contain the same information and correspond to each other. 

Here’s a handy table that explains the key differences between purchase orders and invoices:

Purchase Order Invoice
Who creates it? Buyers are responsible for creating POs. Vendors are responsible for creating invoices.
When to send? Must approve and send to the vendor prior to purchase, or kept for internal record. Create and send an invoice once payment has been received.
What information does it contain? – Details of what’s being purchased (products/services, and the requested quantities)

– SKUs, model numbers, and brand names of each item
– Pricing

– Delivery date

– Delivery location

– Billing address

– Payment terms

– PO number

– Invoice number

– Itemized breakdown of the order with the cost


An example

Here’s an example to help you understand how to use a PO and an invoice in the purchasing process:

David is an IT Manager at a software company. He needs to purchase some laptops for new hires. He creates a PO that outlines everything that’s needed, including the quantity and any specific requirements (like the number of laptops, laptop models, etc).

The company responsible for selling the laptops receives the PO. After they confirm they can supply the laptops with the required specifications, they fulfill the order. They ship the laptops with a delivery date and attach an invoice. 

When David receives the laptops, he has to verify the delivery.

Sarah, the company’s accounting manager, will then perform a 3-way match once the invoice is received. Provided everything matches up, Sarah can submit the invoice for approval and then pays the seller.

Once complete, it’s important to mark the PO as closed and the invoice as paid.

Is a purchase order a contract?

Yes, when accepted by a vendor, a purchase order is a legally-binding contract.

Vendors ‘accept’ a purchase order by telling the buyer that they can fulfill the order. Vendors can ‘reject’ a purchase order by telling the buyer that they cannot complete the order. 

Alternatively, if Request for Quotation (RFQ) is part of the process, the vendor can simply not accept the RFQ to indicate that they cannot fulfill the order.

The benefits of using electronic POs

If you’re using paper-based POs, you’re creating more work for yourself than you need to. You also open yourself up to a range of potential errors, all of which are avoided with electronic POs.

E-procurement platforms like Procurify can streamline company purchasing and provide greater transparency into every stage of the purchasing process.

Here are the benefits of switching to an electronic purchase order system and purchase order software:

1. Centralized purchase orders

In cloud-first procurement environments, the management of organizational POs is centralized to one online platform. Teams and managers get full visibility into what stages the POs are at, in real-time. Because purchase order software lives in the cloud, POs are stored securely, yet remain accessible from any location at all times.

2. A faster purchase order approval process

Approving team members are notified immediately when a purchase request is submitted in the system. Paper-based approval workflows often lead to inefficiencies that result in bottlenecks. 

3. Better visibility into budgets

Purchasers and procurement managers know what’s coming down the spend pipeline. Pending but not-yet-approved purchases are known and taken into account before the approval of additional spending.

4. You can avoid unnecessary expenditure and fraud

Because they offer better approval systems and automated three-way matching, e-procurement platforms can reduce the chances of your company paying for things that haven’t been received. They also make it easier for teams to spot fraudulent invoices prior to payment.

5. Efficient record-keeping, and less room for an administrative error

Good record-keeping is essential for purchasing and procurement. It’s easy to lose, damage, or accidentally destroy paper-based records. It’s often hard to spot duplicate requests, purchases, invoices, or missing transactions — all of which can cost your company time and money. Using paper also requires an efficient and regularly updated filing system which consumes space and man-hours in order to work effectively.

Digital records eliminate all of these problems. When managed in the cloud, more than one person on the finance team can access every PO. In short, these vital documents don’t live on one person’s desk, and they won’t go missing. This isn’t only better for end-to-end purchasing visibility, it’s great for purchasing efficiency, too.

6. Sustainability 

Less paperwork means a better carbon footprint for your company.

The Pros and cons of using POs

POs are important because they can help companies:

  • Avoid duplicate orders
  • Avoid surprise invoices
  • Track incoming orders
  • Catch unexpected pricing increases
  • Improve financial and inventory accuracy
  • Comply with auditing requirements
  • Smarter budget: procurement teams can only purchase with available funds, which require approval
  • Improve (and even speed up) delivery times, as POs help to schedule delivery for whenever the buyer needs it
  • Ensure clear communication with vendors
  • Act as legally binding documentation

However, it’s important to assess your company’s specific needs before introducing a purchase order system as there’s an administrative downside to using POs

The drawbacks of using POs include:

  • POs create additional paperwork, which can be annoying for smaller purchases and time-consuming for smaller teams
  • Although they don’t act as a legal contract between the vendor and the supplier, credit cards can replace POs to help with record keeping and documenting purchases. (Keep in mind, if a company does use credit cards for purchasing, POs can facilitate the credit card reconciliation process for the accounting team.)

Should you use purchase orders at your organization?

Using purchase order forms can help a company shift its spend culture from a reactive state to a proactive state. So should you use purchase orders in your business or not?

To answer this question and create an approach to purchasing that works for your company, you’ll need to take a step back and observe how your organization is currently handling purchasing.

POs give you insight into your company spending. They help team members make purchases efficiently and streamline the purchasing process. They also help accounting teams reconcile spending.

Here’s what you should assess before you integrate a purchase order system in your company.

Purchase requisitions: helpful or not?

Assuming your organization doesn’t currently use purchase orders, it is also likely that you’re not managing the requests your team members make when they want to purchase something. Most organizations simply allow their team members to email a manager their request and then have that person make the necessary purchases.

An informal purchasing approval process probably isn’t an issue if your company is small and team spending isn’t exceeding your budget. But as your company grows and more teams start purchasing goods and services, the need to have tighter control on company spending will arise. This is where purchase requisitions will come in handy.

Requisitions are a purchase order request your team members make for materials or items they need to do their job. The approval or denial of a PO happens when a team member sends the request to their manager, or directly to the procurement team.

By formalizing the process of requesting to purchase something, you can eliminate excessive and unnecessary expenditures and get your company spending under control.

Keep in mind, introducing purchase requisitions is that it adds yet another step in the purchasing process. So consider if the benefits outweigh this drawback before moving forward.


If getting your budgets under control is a priority for your company, you should know that adding PO requests creates two important benefits—the ability to manage a budget for team spending and the opportunity to take advantage of volume discounts on large orders.

As team members begin to draft purchase requisitions, you’ll be able to create an average monthly spend and track what your teams are purchasing. This means you can start analyzing how they use supplies and identify opportunities for savings. An approver will be the person managing the budget. If teams go over budget, the approver may not approve all the purchase requisitions that are not immediately necessary.

Volume discounts

Is there a chance that bulk purchasing could get you better discounts from vendors? If so, POs and purchase requisitions are likely going to be helpful. 

Once your teams begin submitting purchase requisitions, the approver can also easily identify purchasing patterns. The approver can then submit bulk orders and request discounts to vendors. If the requests is digital, it can significantly reduce processing time because teams can add frequently requested items to a catalog from the best supplier at the best price.

Purchase orders

Is purchasing getting out of control? Do you have clear, transparent insight into who’s buying what, and which vendors you should be buying from? Can you access real-time financials that tell you how much you (and your teams) can spend on purchases at any given moment in time?

Your answers to these questions will provide clues on whether you need a purchase order system in your business.

If the answer is yes, then we’ve got good news: creating a purchase order process is likely as simple as contacting suppliers and informing them that from now on you’ll be submitting a PO before sending payment for goods. The supplier will likely be happy about this because it will significantly help both parties.

The purchaser will complete a PO form and send it to the vendor when an approved request is ready for purchasing. If there are any concerns or issues with the purchase, a vendor will communicate these clearly. After they receive payment, they’ll ship the product and send an invoice.

Introducing a PO process is even easier for you, your departments, and your vendors when you use purchase order software.


Many organizations avoid using purchase orders because they don’t want to deal with extra paperwork or slow their existing processes down. But unless your business is small and makes just a few purchases from a handful of vendors each month, you’re probably not leveraging the many benefits that a purchase order system can bring to your company and its bottom line.

Purchase orders offer vendors clear legal guidelines and instructions for purchasing. For an organization, they offer an audit trail. Finances leaders can refer to this when things go wrong.

Streamline Your Purchase Order Process

Procurify’s purchase order management software automates your company’s purchasing workflow from order creation all the way to invoice payment – to speed up purchasing, improve internal communication, and minimize financial risk.