The Tracker Was Committing Perjury
The "Daily Tracker" said we were crushing it. Then I closed the books and my stomach dropped.
On April 15th, I finally closed the books for March.
The founder had been riding high all month. We’d run a 20% anniversary promo, launched a new hoodie that was flying off the shelves, and our MER (Marketing Efficiency Ratio) was right on target.
He’d Slack me every few days: “Ad spend is looking really healthy. Profit is going to be strong.”
He wasn’t reading the situation wrong. He was reading the tracker correctly.
The problem was, the tracker wasn’t telling the whole story.
When I finished the P&L, the "strong profit" had evaporated. I opened a blank doc, started a bulleted list of why we’d actually lost money, and sent the message every finance leader hates typing:
"Hey, can we chat?"
(Gulp.)
Where the Profit Went
The tracker showed revenue and ad spend. It looked clean. But it was blind to three “under the hood” changes that ate our margin alive:
The 3PL Silent Killer: We’d signed a 3PL contract renewal the month before. Fulfillment rates had crept up, but the tracker was still using last year’s “estimated” shipping costs.
The Hoodie Trap: That “hero” hoodie launch? It crushed volume, but its landed cost was higher than our core tees. It dragged down our blended gross margin by 4 points, which was a detail the tracker didn’t see.
The Tariff Tick: A recent tariff rate increase hadn’t yet been updated in our landed cost assumptions.
Each of these on their own was a flesh wound. Together, they were a crime scene.
Contribution Margin > MER
If you’re only looking at a marketing tracker, you’re looking at a sales tool, not a business tool.
A tracker asks: “Does this ad drive volume?”
A Contribution Margin (CM) model asks: “What does the profit look like on every unit sold at THIS price, against our ACTUAL fulfillment rate, with our ACTUAL payment processing cost?”
The tracker was telling us to spend more because the top line looked great. But without the actual 3PL and COGS updates, it was just a wet finger in the air calculation.
The CM model would have told us to slow down because we were losing cents on every dollar.
[Insert Waterfall Chart Visual: The “Unmasking the Perjury” Chart]
The Tracker’s Blind Spot: In the tracker, we were using “Estimated” shipping ($12) and “Standard” COGS ($24). In reality, the 3PL renewal and the Hoodie’s weight pushed those to $18 and $28. That’s a $10 swing per unit that the marketing team never saw.
The Weekly Operating System
I still look at the tracker. It’s great for real-time ad efficiency.
But I now run a Weekly CM Model alongside it. One tells me if the ads are working; the other tells me if the business is actually profitable.
Crucially, the CM model also includes our Fixed Cost Run Rate. It’s the only way to know if your “profitable” ads are actually generating enough contribution to clear your rent, payroll, and software before the month closes.
If you want to stop the perjury, your next step is simple: Ensure your variable cost assumptions and fixed cost run rate are updated before you run the numbers. Don't wait for the April 15th P&L to tell you that your shipping rates changed or your overhead outpaced your growth.
If your founder is approving promos based on MER alone, show them the visual above. They are flying with a broken compass.
See you next week.
We’ll talk about the time we had 60,000 units of joggers and couldn’t pay our supplier. Every PO is a forecast. The price per unit is only one line in the real math.
See you then.
- Brad
P.S. I’m giving the “wet finger in the air” line a 7/10. Trust me, they won’t all be this good.