Key Takeaways

  • The Home Depot had to buy one $799 tool combination kit 4.2 times from suppliers just to complete a single legitimate customer sale.
  • Locking high-theft products behind security glass frequently increases total category sales by guaranteeing products remain on shelves.
  • Phantom inventory threatens core retention: 50% of Home Depot revenue comes from professional contractors who walk away if listed inventory is missing.
  • To manage customer friction, the retailer installed QR codes on security cases that alert store associates, achieving an average response time of 90 seconds.
  • The next phase of loss prevention involves letting verified loyalty members self-unlock security cases directly from their phones.

The 4.2x Shrink Math

Most operators assume that putting products behind locked glass is a desperate concession that destroys top-line sales. The common belief is simple: every ounce of friction introduced before the cash register kills conversion.

Scott Glenn, Vice President of Asset Protection at The Home Depot, ran the unit economics on high-theft categories and found the opposite reality. On specific high-value tools, shrink was so extreme that standard sales margins completely collapsed. Glenn described the math on one flagship SKU: “We found that, one particular combination kit that we were selling for $799, we would buy it 4.2 times for every time we sell it. Now, go have that conversation with your finance folks and they go, that's a gross margin mix we don't like, that's a real business opportunity.”

When a store pays wholesale costs on four stolen items to capture the retail revenue of one unit, gross margin turns deeply negative. Locking up the product stops the bleeding immediately.

Phantom Inventory Kills Your Best Customers

Placing items behind glass causes shopper friction, but empty shelves cause permanent churn. This is especially true for businesses reliant on repeat, high-value buyers.

At The Home Depot, professional contractors generate half of total sales. A contractor does not shop for leisure; they show up because an active job site stalled. “We're in a business that 50-ish percent of our revenue comes from pros and contractors,” Glenn explained. “If they leave a job site because their drill broke, and they go to the store because it said we had one and we don't, that's a problem, too.”

When inventory tracking systems claim an item is sitting on shelf five, but a theft ring stole it three hours earlier, the customer experiences a stockout. If that customer is a contractor billing hourly rates, they will not return. Glenn noted that once items are secured, revenue often rebounds: “There are some categories where that is true. There's also many, many categories where actually sales go up because you're in stock.”

Friction Engineering and Self-Service Access

To balance loss prevention with speed, Home Depot turned to digital paging. The company attached QR codes to locked cases. When a customer scans the code, it summons an associate to unlock the shelf, averaging a 90-second wait time.

Glenn views that 90-second wait as an interim step. The future is identity-gated access rather than physical staff intervention. “I want to be in a place where customers can self service,” Glenn said. “If they scan the QR code and I know that they're a pro that's in our loyalty program, why can't I give them access to that?”

By tying physical security to digital identity verification, retailers can remove friction for trusted high-frequency buyers while keeping bad actors out.

What to Do With This

Audit your core product line for phantom inventory or unlogged operational waste this week. Calculate whether your customer drop-off is driven by intentional friction or by failing to deliver what your system promised was ready. If high-value repeat users are leaving due to unfulfilled promises, add deliberate verification steps that protect product availability.