The Question Every CFO Asks
I am a CPA by training. I spent the early part of my career in a world where every dollar had to be traced, justified, and reconciled. So when a CFO looks at a seven-figure consulting engagement and asks whether the return justifies the investment, I do not take the question as skepticism. I take it as the right question, asked by someone doing their job.
Here is the straightforward answer based on more than 30 years and $1B+ in documented client savings: a well-executed strategic sourcing engagement with a specialized firm typically returns 6–15 times the consulting fee in realized savings. Not identified savings. Realized savings—the kind that show up on your general ledger and improve your earnings per share.
How the Math Works
Let me walk through a representative scenario. A mid-size manufacturer with $500M in annual direct material spend engages a specialized sourcing firm for a 12–18 month engagement covering their top 6-8 spend categories. The consulting investment is approximately $2M–$3M all-in.
Strategic sourcing across those categories typically yields 10–25% cost reduction, depending on category maturity, competitive dynamics, and specification flexibility. At the conservative end—10% across $300M—that is $30M in annual savings. Against a $3M investment, that is a 10× return. At a more typical 15%, you are looking at $45M against the same fee—a 15× return.
Our published range of 6–15× is deliberately conservative. It accounts for the reality that not every category yields maximum savings, that implementation timelines vary, and that some savings take 12–18 months to fully materialize on the P&L. We would rather under-promise and over-deliver, which is admittedly unusual in consulting.
Why Specialized Firms Outperform
The ROI differential between a firm that specializes in direct materials and a general management consultancy is not subtle. It is structural.
Large strategy firms deploy junior analysts who build excellent presentations. They identify opportunities correctly. But they typically exit before implementation, and their fee structures reflect their overhead—partner rates at $800–$1,200 per hour, with most of the work performed by associates at $350–$500. You are paying for the brand and the framework, not for the hands-on category expertise and supplier relationships that drive savings.
Firms that specialize in direct materials like ours operate differently. Our engagement teams are led by senior practitioners who have personally negotiated hundreds of millions of dollars in supplier contracts. They know the suppliers, they know the cost structures, and they know exactly where the margin is hiding. And they stay through implementation to ensure the savings convert.
That combination—deeper expertise, lower overhead, and execution through the P&L—is why specialized firms consistently deliver higher ROI on sourcing engagements.
If your consulting firm’s fee does not pay for itself within the first two categories, you hired the wrong firm.
The Self-Funding Engagement
Here is how I frame it for CEOs who are evaluating whether to invest in external sourcing support. A well-structured engagement should be self-funding by the end of the first year. Meaning: the savings generated from the first two or three categories to reach implementation should exceed the total consulting fee for the engagement.
If a firm cannot structure an engagement that way—or is unwilling to tie their compensation to measurable, P&L-verified results—that tells you something important about their confidence in their own execution capability.
We routinely structure engagements with gain-share components for exactly this reason. When a significant portion of our fee is tied to realized savings, our incentives and our client’s incentives are perfectly aligned. We are not selling hours. We are selling outcomes.
What to Look for in an ROI Conversation
When evaluating a sourcing partner, any firm can promise ROI. Here is what separates credible claims from marketing. First, ask how they define savings—identified or realized? If they quote identified savings, discount heavily. Second, ask about their fee structure and whether they are willing to put compensation at risk against results.
The answers to those two questions will tell you whether you are talking to a firm that delivers returns or one that delivers slide decks.
About Tenet Consulting
Tenet Consulting is a Chicago-based strategic sourcing and supply chain consultancy that has delivered more than $1 billion in documented client savings across 20+ manufacturing industries. Co-founded by Scott Brewer (CPA, 30+ years) and Roger Riley (30+ years Fortune 500 transformation), Tenet uses a proprietary 7-step sourcing process to achieve 6–15× ROI. Contact us at tenetconsulting.com.
