Comparing Single to Sole Source Procurement | Back-to-Basics

28 January 2024

Single Source – vs. – Sole Source. What’s the Difference?

Comparing Single to Sole Source Procurement. What is the difference and why use one over the other? Compare Sole Sourcing and Single Sourcing for Strategic Procurement.

Two terms that look almost identical on paper but describe fundamentally different procurement situations. Knowing which applies to your project is essential — especially if your organization operates under public procurement rules.

Procurement: Single Source – vs. – Sole Source.

If you work in procurement, operations, or project leadership, you have likely encountered both terms. They are often used interchangeably — and that is a mistake that can have real consequences, particularly for organizations subject to competitive procurement regulations.

The distinction matters strategically too. Choosing the wrong sourcing method for a given situation can limit your negotiating power, create supplier dependency you did not plan for, or expose your organization to compliance risk. This article defines each method clearly, compares their advantages and challenges side by side, and includes a decision tool to help you identify which method fits your current procurement scenario.

“The difference between sole source and single source is not just terminology — it is the difference between a deliberate strategy and a legal requirement.”

DEFINITIONS:

Two Methods, Two Very Different Situations

Sole Source
  • Also known as: direct award.
Sole source procurement means there is genuinely only one supplier capable of meeting the requirement. The contract is awarded without competition — not by preference, but by necessity. This is a factual condition, not a business choice.
When it applies
  • Spare parts for equipment manufactured by only one company
  • Proprietary goods or services with exclusive rights or capabilities
  • A consultant who holds a patent critical to the project
  • Specialized software available from a single vendor only
What is Sole Source Procurement? 

Sole source procurement is a sourcing method that involves awarding a contract to a sole supplier without any competition or bidding process. It is also known as single-source procurement or direct award.  

The main reason for using sole source procurement is to meet urgent or emergency needs that require immediate delivery of goods or services. You may also use this method to obtain unique or proprietary goods or services that can only be provided by one supplier who has exclusive rights or capabilities.  

Some examples of sole source procurement are: 

  • You need to buy spare parts for a machine that is manufactured by only one company.  
  •  You have a supplier who offers unique or proprietary products that cannot be easily sourced from other suppliers. 
  • You need to hire a consultant who has patented a method critical for your project.  
  • You need to purchase a specialized software program that is only available from one vendor. 

 

Single Source
  • Also known as: preferred supplier
Single source procurement means selecting one supplier from a pool of qualified options — by deliberate choice. Alternatives exist, but the organization consciously commits to one supplier for reasons of value, relationship, or strategic alignment.
When it applies
  • A proven supplier with demonstrated reliability and efficiency
  • Specialized expertise essential to the project but not exclusively held
  • A supplier offering significant pricing discounts for exclusive supply
  • A long-term relationship with established trust and integration
What is Single Source Procurement? 

Single source procurement is a sourcing method that involves choosing one supplier from a pool of qualified suppliers who can provide the goods or services you need. It is also known as preferred supplier or selective tendering.  

The main reason for using single source procurement is to establish a long-term relationship with a trusted supplier who can offer you the best value, quality, and service. You may also use this method to reduce the time and cost of the procurement process, as you do not need to conduct extensive market research or evaluation of bids.  

Some examples of single source procurement are:  

  • A contract with a supplier who has a proven capability to be reliable and efficient in delivering orders.  
  • A supplier that has specialized skills or expertise that are essential to a project and cannot be easily replicated.  
  • A supplier that offers unmatched pricing discounts or loyalty incentives for exclusively supplying all the businesses requirements for a particular product or service.  

Download the Comparison Chart: The Sole vs. Single Source comparison visual is available for use in procurement training, team briefings, and policy development.

The Advantages and Challenges

Both methods remove the competitive bidding process — but for different reasons and with different risk profiles. Here is how they compare across the factors that matter most to procurement decisions:

Comparing Methods
The Advantages and Disadvantages.

Both single source and sole source procurement have their own advantages and disadvantages, depending on the situation and the objectives of your business. 

Here is how they compare across the factors that matter most to procurement decisions:

Single Source

Advantages 

  • Saves time and reduces the cost of procurement.  
  • Encourages long-term relationship and trust with supplier.  
  • May enhance the quality and performance of goods and/or services.  

Disadvantages  

  • Reduces competition and transparency.  
  • Increases dependency and complacency with one supplier.  
  • May result in higher prices or lower quality due to a lack of alternatives. 
Sole Source

Advantages 

  • Meets urgent or emergency needs.  
  • Obtains unique or proprietary goods or services.  
  • Maintains consistency and continuity of goods or services.  

Disadvantages  

  • Increases risk of fraud or corruption.  
  • Reduces bargaining power and leverage with suppliers.  
  • May lead to disputes or conflicts over contract terms or scope.  
DEEPER DIVE:
What you should know about Sole Sourcing 

In Canada the use of sole source procurement is restricted to certain allowable situations that ensure the competitive process is protected. When non-competitive procurement is used justification must be provided and documented.

https://buyandsell.gc.ca/for-government/buying-for-the-government-of-canada/plan-the-procurement-strategy

CANADIAN SPECIFICATIONS

🍁Non-competitive procurement or ‘sole source’ buying in Canada 🍁 

This refers to a requisition which specifies that a particular supplier is the only one acceptable. The sole source requisition must contain justification for requesting this specific course.

The Canadian Government Contracts Regulations require the competitive soliciting of bids before any contract is entered into. However, contracts may be entered into without soliciting bids when:

  • There is a pressing emergency such as natural disasters like earthquakes or floods; or
  • The estimated expenditure is less than;
    • $25,000 CAD for goods and services (buyers are still expected to solicit bids below this value whenever it is cost effective to do so); or
    • $100,000 CAD for architectural and engineering services and other services required in respect of the planning, design, preparation or supervision of the construction, repair, renovation of a work; or
    • $100,000 CAD for the Canadian International Development Agency (CIDA) service contracts related to international development programs or projects; or
  • A competition is not in the public interest; or
  • Only one supplier is capable of performing the work, as in the case of a supplier who owns a copyright or software license.

For more information, please visit:  PWGSC Supply Manual, Chapter 3: Section 3.15 Non-competitive Contracting Process. (https://buyandsell.gc.ca/policy-and-guidelines/supply-manual/section/3/15)

DEEPER DIVE:
What you should know about Single Sourcing 

Single-source procurement is a sourcing method that involves awarding a contract to a supplier without engaging in any competition or bidding process first.  The agreement is either knowingly and deliberately crafted or is inadvertently made to be exclusive to a single source for the purchase of a particular product and/or service.

The advantages of single-source procurement are: 
  • Reduces time spent and decreases the cost of procurement by removing the requirement for further market research or evaluation of bids in subsequent purchases of the same product or service.  
  • The nature of the relationship encourages long-term dependency and has potential to increase trust with suppliers, demonstrating reliance on the expertise and experience they can contribute to a project.  
  • It can lead to enhancement in the quality and performance of goods or services through benefits attributed to the supplier’s specialization and innovation.  
The disadvantages of single-source procurement are: 
  • Reduces competition and transparency, as there is not a known alternative option or any current research with industry benchmarks to compare against.  
  • Increases the risk of fraud or corruption, as there may not be any checks and balances within an oversight mechanism to ensure accountability and fairness.  
  • Potential to pay much higher prices and to receive lower quality due to a lack of alternatives, effectively reducing bargaining power that could be leveraged with the supplier.  
Single Source or Sole Source:
Which Applies to Your Procurement?

Work through these questions about your current procurement project. Your answers will help identify the most appropriate sourcing method — or signal that a competitive process may be the right path instead.

TEST YOUR KNOWLEDGE

Is it Single Source or Sole Source Procurement?

Take this short questionnaire to reveal more about a procurement project and identify whether it is a single source or sole source procurement.

  1. What are your requirements?  
  2. What is your timeline?  
    • Emergent
    • Urgent
    • Flexible
  3. What size is your pool of potential suppliers?  
    • Large
    • Small
    • One, only one supplier can fulfill the requirement.
  4. What is this project for your business?  
    • Routine
    • Important
    • Strategic
  5. How much risk are you willing to take?  
    • High Risk Tolerance
    • Medium Risk Tolerance
    • Low Risk Tolerance
  6. Is your organization subject to legal requirements a public entity?
    • Yes
    • No
  7. Do any of the reasons in the Sole Procurement justification list apply to your procurement?
    • An emergent situation requires timely action to prevent injurious harm
    • Is under the exemption and qualifies as being a low spending amount
    • The nature of the work makes it unwise to publish a public request for bids
    • Only one possible supplier due to proprietary information or specialization

Did answering these questions help to identify whichever of single or sole sourcing applies to your procurement project?

 

PROCUREMENT:

Other Methods to Consider:

Perhaps neither of these methods are a match and you will be needing an alternate procurement method.

Try one that will raise the level of competition for the contract award, result in an increased number of bids, offer alternative solutions for achieving a business objective, and that could include an open tendering  process.

 

STRATEGIC SOURCING:  
The Optimal Method for Strategic Procurement.

To summarize, sole sourcing and single sourcing are two different strategies applied in procurement and they each fulfill different requirements for the purchaser.   

It is important to understand the differences between single source and sole source procurement, to know the specific responsibilities in public procurement for Canada, and to understand the purpose of selecting a sourcing method for any given scenario.

Complex Procurement – A complex procurement has the characteristic of dealing with the unknown. It requires creativity and ongoing development.

Competitive Contract – Is where the process used for the solicitation of bids enhances access, competition and fairness and assures that a reasonable and representative number of suppliers are given an opportunity to bid.

The right sourcing method for any given procurement depends on a clear-eyed reading of the facts: how many suppliers exist, what the timeline demands, what level of risk is acceptable, and what regulatory framework governs the organization. Neither sole source nor single source is inherently better — each has a proper context, and using either outside that context creates problems that compound over time.

If your team is working through a procurement decision that involves non-competitive sourcing — or if you need help formalizing a sourcing strategy that holds up to scrutiny — S&Co. can provide the expertise and the framework to do it right.

At S&Co., Supply Chain Logistics Consulting Inc., our mandate is to improve the way things are done. Reach out with a specific challenge or a sourcing scenario you are working through — we would like to hear about it.

 

For more information and to learn how we can help, contact Supply Chain Logistics Consulting. Find information, research, and advice, to assist you with your business development goals.

Resources:

https://www.canada.ca/en/department-national-defence/corporate/reports-publications/proactive-disclosure/oggo-20-march-2023/procurement-overview.htmlhttps://www.editions.sclci.net/p/sclcis-early-editions-sourcing-methodshttps://canadabuys.canada.ca/en/how-procurement-works/policies-and-guidelines/supply-manual/glossary#c

At Supply Chain Logistics Consulting our mandate is to improve the way things are done.
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