It’s not what you sell—it’s what you keep after freight, fuel, and warehousing that counts.
Ask any distributor in the glass, ceramics, or refractories sector what their top-selling product is, and you’ll get a quick answer: maybe 3/8” tempered safety glass, 99% alumina crucibles, or IFB 2300-grade bricks. Ask what their most profitable product is, and you’ll likely get a blank stare—or a shaky estimate. Why? Because too many businesses calculate gross margin in isolation, ignoring one of the most volatile and impactful factors in today’s market: logistics costs.
If you’re not backing out freight, fuel surcharges, customs, handling, and warehousing when calculating your margins, you’re not seeing the true profitability of your SKUs. And in a distribution model where freight can eat 8–15% of landed cost—especially for heavy, fragile, or oversized items—that oversight can turn a seemingly healthy line item into a silent loser.
Understanding Net Margin in Distribution
Net margin, in the simplest terms, is your profit after all direct costs associated with fulfilling an order. While many distributors calculate gross margin as:
(Selling Price – Cost of Goods Sold) / Selling Price
Net margin adds layers:
(Selling Price – [COGS + Freight + Handling + Duties + Storage]) / Selling Price
For example, say you sell a pallet of high-temp ceramic plates for $6,000. Your COGS is $4,200. On paper, that’s a 30% gross margin. But:
Freight from your supplier costs $450
Internal handling adds $120
Cross-border duties (into Canada) run $90
Warehousing adds $40 in monthly pro-rated cost
Now your true cost is $4,900, and your net margin is just 18.3%. That’s a big drop—and if you’re basing your pricing, discounting, or sales comp on the 30% figure, you’re bleeding cash.
Freight: The Hidden Margin Killer
Logistics inflation hit every distributor hard over the past few years, but for sectors like glass and refractories—where materials are heavy, brittle, and require specialty shipping—those increases have been brutal. A 10% fuel surcharge here, a $95 palletization fee there—it all adds up.
Distributors must treat freight not as a cost center to eat, but as a variable to monitor and model. Some best practices:
Use landed cost per SKU, not averages. A 4×8’ pane of low-iron glass ships very differently than a pallet of glass tiles.
Segment freight impact by geography. Western Canada shipments may cost 2–3x more than deliveries within the U.S. Northeast corridor.
Use dynamic margin calculations in pricing tools. Spreadsheets won’t cut it—invest in ERP or CPQ systems that embed logistics inputs into real-time profitability models.
Warehousing and Handling: Don’t Overlook Internal Costs
Many distributors overlook the cost of internal movement and storage. If you’re moving pallets of dense refractory material across zones to pick a single item, or holding ceramic dies for clients who haven’t ordered in 18 months, you’re incurring invisible drag on your margins.
It’s critical to attribute handling time, equipment usage, and even slotting value to high-maintenance SKUs. Once you quantify it, you can:
Raise prices accordingly
Set minimum order thresholds
Offer drop-ship alternatives with lower handling needs
Turning Margin Visibility into Margin Action
Distributors who build net margin awareness into daily decision-making can confidently:
Decline unprofitable orders (or reprice them)
Repackage freight into bundled or FOB pricing structures
Incentivize sales teams based on net margin, not volume
Ultimately, it’s not just about calculating margin—it’s about managing it with discipline.
:
Gross margin may look good on the top line, but only net margin reflects your true profitability. For distributors in the glass, ceramics, and refractories space, logistics costs are no longer background noise—they’re strategic variables. The more visibility you build into your costing, the more confident you’ll be in pricing, inventory, and customer decisions. Profit isn’t what you invoice—it’s what you retain after the truck rolls out.
