The short answer. Your real gross margin is what the business delivers after every job actually closes: labor at delivered productivity, materials at actual cost, freight and shrinkage at real waste. The margin your pricing model targets is the intended margin. The gap between the two is the cascade effect. It costs money on every job. It shows up in the P&L only as a blend, so nobody sees the pattern.
Intended vs Realized Gross Margin
Your pricing model assumes a set of inputs. Labor at $X per billable hour blended, materials at Y percent markup, delivery at Z percent efficiency. That produces an Intended Gross Margin percent.
Your job tickets deliver the same work at actual inputs. Labor at delivered billable-to-paid ratio, materials at actual invoiced cost including small variances, delivery at actual efficiency including reruns and rework. That produces a Realized Gross Margin.
Realized is almost always lower than Intended. The question is by how much and whether the gap is stable or growing.
The Cascade Effect Math
Take Intended Gross Margin at 42 percent. Take Realized at 34 percent. That is an 8-point cascade. In a business with $2.4 million in revenue, an 8-point cascade is $192,000 in gross margin dollars that never showed up.
That $192,000 is not lost to fraud, theft, or dramatic events. It is lost to invisible variance. Slightly slower labor. Slightly wasted material. Slightly longer delivery. Each one small. The compound is not small.
This is what Layer Cake Layer 4 is designed to surface. Intended margin stays as the pricing model input. Realized margin is calculated from actual delivered work. The gap becomes visible in dollars.
How To Find Your Real Gross Margin
Pull the last twelve months of P&L. Take gross margin percent as reported.
Now pull the pricing model. What did the pricing model assume for labor productivity, materials markup, and delivery efficiency?
Multiply revenue by the intended gross margin percent from the pricing model. That is what the pricing model said gross margin dollars should be.
Compare against actual gross margin dollars from the P&L. The difference is the cascade in dollars.
If the difference is small (under 2 percent of revenue), the pricing model is aligned with delivery. If it is medium (2 to 6 percent of revenue), the cascade is a variance-management problem. If it is large (over 6 percent), the pricing model is structurally misaligned with what the business actually delivers.
Frequently Asked Questions
Why isn't the cascade on my P&L?
Because the P&L reports a blend. Gross margin percent on the P&L is total gross margin dollars divided by total revenue. It absorbs the cascade without naming it. To see the cascade, you have to compare what the pricing model intended against what the P&L delivered.
Can I fix the cascade without raising prices?
Sometimes. If the cascade is from labor productivity below intended, fixing it may be a scheduling or management change. If it is from material waste, fixing it may be a purchasing or storage change. Only if the cascade is from a structural misalignment does the fix require repricing.
Is a 4-point cascade normal?
Common, not normal. Common because most businesses have never measured intended-vs-realized. Not normal because 4 points of gross revenue over a $2 million business is $80,000 a year, which is the difference between comfortable and tight for most owners.
Does the cascade shrink as the business grows?
No. It scales with revenue. Same 8-point cascade at $4 million revenue costs $320,000, not $192,000. Growth without a variance fix compounds the cascade.