You need a robust system to control your spending on procurement. Without structure, you risk overspending, delays, and confusion with suppliers. Two important tools in this system are the purchase requisition and the purchase order.
Many professionals confuse these documents or use them interchangeably. But they serve different purposes in the procurement process.
A purchase requisition, also called a purchase request or purchase order requisition, is an internal document. You use it to request permission from your managers to purchase goods or services. On the other hand, a purchase order is an external contract. It is sent to the supplier to confirm the purchase once the request has been approved.
In today’s article, I will explain the concepts of purchase requisition and purchase order, their importance, processes, and key differences. By the end, you will know when to use a purchase request and when to issue a purchase order.
What Is a Purchase Requisition?
A purchase requisition is the first step in the buying process. It is an internal document that a user submits to request approval before buying goods or services.
The document can include:
- Department name and requester’s contact details
- Item description and quantity
- Estimated price and supplier information
- Expected delivery date
- Reason for the purchase
The goal of a purchase request is to control spending and ensure the purchase aligns with budgets and company policies. Once submitted, the request goes through an approval process. Managers verify if funds are available and confirm that the request adheres to company rules.
Purchase requests prevent unauthorized purchases. They also create a clear audit trail for finance teams and auditors. Without requisitions, you risk duplicate purchases, fraud, and a lack of accountability.
Importance Of Purchase Requisition
PR is important for the following reasons:
1. Control and Authorization
A purchase requisition ensures that no employee or department can spend company money without prior approval. It acts as a checkpoint before creating a purchase order. This prevents unauthorized or unnecessary spending.
2. Budget Compliance
PRs require finance or management to review whether funds are available. This ensures that purchases stay within approved budgets and align with company financial policies.
3. Transparency and Accountability
Since every purchase request records who requested it, what was requested, and why, it creates an internal audit trail. This makes it easier to track purchasing decisions and hold people accountable.
4. Fraud and Error Prevention
By requiring approvals, PRs reduce the risk of fraud, duplicate orders, and purchasing mistakes. It ensures that only valid and necessary items progress through the procurement process.
5. Efficient Procurement Workflow
Purchase requisitions streamline the workflow by standardizing how needs are reported, reviewed, and approved. This consistency saves time and reduces confusion between departments.
6. Better Planning and Reporting
PR data helps you analyze spending patterns, forecast future needs, and negotiate more favorable terms with suppliers. It also improves the visibility of internal demand.
Purchase Requisition Process
The purchase requisition process ensures spending control and accountability. It standardizes how employees request goods or services, requiring approval before they are converted into a purchase order for suppliers.
The purchase requisition process is as follows:
1. Employee or Department
The process starts when an employee or department identifies the need for goods or services. They gather the necessary details such as product description, quantity, expected cost, and supplier information. This step ensures that purchasing begins with a clear understanding of the requirement and its purpose within the organization.
2. Submit Purchase Request
Once the need is identified, the employee or department fills out a purchase requisition form. This form acts as a formal internal request. It includes key information like the item, justification, cost estimate, and desired timeline. The completed form is then submitted to the approver for review.
3. Review by Approver
The approver, usually a manager or supervisor, reviews the submitted requisition. They check its accuracy, necessity, and alignment with the company’s policies and budget. This review serves as a safeguard, ensuring that only valid and necessary requests are approved or rejected within the procurement process.
4. Request Rejected
If the requisition fails to meet requirements, the approver rejects it. Common reasons include a lack of budget, missing details, or policy violations. A rejection stops the purchase at this stage, preventing unnecessary costs. The employee may revise and resubmit the request after addressing the identified issues.
5. Request Approved
If the requisition is complete, justified, and within budget, the approver grants approval. Approval authorizes the procurement team to proceed with the next steps. It indicates that the organization acknowledges the need and is ready to allocate resources toward fulfilling the requested purchase requirement.
6. Create Purchase Order
Once approved, the requisition transforms into a purchase order. The procurement team creates this legally binding document, which is then sent to the supplier. The purchase order includes detailed information about items, pricing, terms, and delivery. This final step ensures accountability, clarity, and smooth supplier transactions.
What Is a Purchase Order?
A purchase order, or PO, is a legally binding document signed by the buyer and the seller (supplier). It confirms the intent to buy specific goods or services. It is a contract between the buyer and supplier.
A purchase order includes:
- PO number and date
- Supplier details
- List of goods or services with exact specifications
- Quantity and agreed price
- Delivery terms and location
- Payment terms
Purchase orders formalize the buying process. They provide legal protection in the event of disputes with suppliers. They also help you track spending, prevent duplicate orders, and support financial planning.
Unlike purchase requests, purchase orders are external documents. They communicate directly with suppliers and finalize the transaction.
Importance Of Purchase Order
PO is important for the following reasons:
1. Legally Binding Agreement
A purchase order serves as a legal contract between the buyer and the supplier. It clearly outlines the items, quantities, prices, payment terms, and delivery dates, thereby protecting both parties in the event of disputes.
2. Clear Communication
POs ensure suppliers know what the buyer expects. This reduces misunderstandings about product specifications, quantities, or delivery timelines.
3. Budget and Cost Control
By formally approving purchases before they are sent to suppliers, POs help organizations track spending, avoid overspending, and stay within budget limits.
4. Audit and Record Keeping
POs provide an official record of every transaction. This documentation supports financial audits, compliance checks, and future reference for informed procurement decisions.
5. Avoids Duplicate or Unauthorized Orders
Since each PO has a unique reference number, it prevents accidental duplicate orders and unauthorized purchases. This improves overall control in the procurement process.
6. Improves Supplier Relationships
POs build trust with suppliers by giving them documented assurance of payment once they deliver goods or services as specified. This reliability often leads to stronger, long-term partnerships.
7. Data for Planning and Analysis
POs provide valuable data on purchasing trends. Organizations can utilize this information to forecast demand, negotiate more favorable terms with suppliers, and refine their procurement strategies.
Purchase Order Process
The purchase order process formalizes approved requisitions into binding agreements with suppliers. It ensures accuracy, accountability, and compliance, guiding each order from internal approval to external fulfillment and documentation.
The purchase order process is as follows:
1. Purchase Request Approved
The process begins once a purchase requisition has been reviewed and approved. This approval confirms that the requested goods or services are necessary, budgeted, and aligned with company policies. Only after this step can the procurement team proceed with creating and processing a purchase order for supplier engagement.
2. Review and Approve
After the requisition approval, the purchase order draft undergoes another review. This step ensures accuracy of details such as item specifications, quantities, prices, delivery dates, and payment terms. Approvers verify compliance with financial controls and procurement policies before authorizing the purchase order for issuance to suppliers.
3. Order Approval Decision
At this decision point, management determines whether to approve or reject the purchase order. The evaluation focuses on financial justification, necessity, and vendor reliability. If issues are found, the order may be rejected or revised. If approved, the order moves forward to formal issuance, ensuring purchasing integrity.
4. Order Not Approved
If the purchase order fails to clear the approval stage, it will not be processed. This prevents potential overspending, errors, or violations of procurement policies. The rejection ensures accountability and protects the company from unnecessary commitments.
Employees may revise and resubmit the order after addressing identified gaps or compliance issues.
5. Order Approved
Once the purchase order is approved, it becomes an official authorization for purchase. This approval signifies the organization’s commitment to acquire the goods or services under the agreed-upon terms. It provides both internal assurance and external confirmation that the order is valid, accurate, and ready for release to the supplier.
6. Send Purchase Order
In the final step, the approved purchase order is formally issued to the supplier. This legally binding document outlines the items, quantities, costs, and terms of the agreement.
Sending the PO initiates the external procurement process, giving the supplier authorization to fulfill the order while ensuring clarity, accountability, and contractual protection.
Purchase Request Vs Purchase Order
The primary difference is that a purchase request serves as an internal permission slip, whereas a purchase order constitutes an external contract. The request ensures management approves the need and budget. The order stipulates that the supplier deliver exactly what was agreed upon.
Without requests, purchases could pass internal checks. Without orders, suppliers may misunderstand requirements or fail to meet terms. Used together, both documents create a strong system that improves control, accuracy, and trust.
The following table shows the key differences between PR and PO.
| Parameter | Purchase Request | Purchase Order |
| Purpose | Internal approval to buy | External contract with the supplier |
| Initiator | Employee or department | Procurement or finance team |
| Approval | Required before issuing a PO | Issued after approval |
| Legal status | Internal record | Legally binding |
| Role | Prevents unauthorized spending | Confirms and finalizes the purchase |
Conclusion
Purchase requests and purchase orders are not the same. A purchase request is an internal approval document. A purchase order is an external contract. Both are essential for procurement, controlling costs, preventing fraud, and building stronger supplier relationships.
By using both documents properly, you can maintain transparency, accountability, and efficiency. Skipping these processes risks overspending and disputes with suppliers. Together, they form a complete procurement system.
Further Reading:
- What is a Purchase Requisition?
- What is the Purchasing Process?
- RFI Vs RFQ: Request for Information Vs Request for Quotation
- RFI Vs RFP: Request for Information vs Request for Proposal
- RFQ Vs RFP: Request for Quotation Vs Request for Proposal
- What is a Purchase Order?
Reference:
I am Mohammad Fahad Usmani, B.E. PMP, PMI-RMP. I have been blogging on project management topics since 2011. To date, thousands of professionals have passed the PMP exam using my resources.
