The short answer. Breakeven Sales Volume is calculated bottom-up through Layer Cake. Add MMP (Layer 1) to Fixed Cost Capacity (Layer 2). That is Required Gross Margin Dollars (Layer 3). Divide by Intended Gross Margin percent (Layer 4). The result is Breakeven Sales Volume (Layer 5). Most owners have never done this math because their accountant computed breakeven off net income, which does not include principal payments, working capital, or market-rate owner compensation.
The Bottom-Up Sequence
Layer 1: MMP. The dollar amount you must clear next month to fund Debt Service, Working Capital, Retirement, Owner Comp at market, and Exit Strategy. See the MMP explainer for the calculation.
Layer 2: Fixed Cost Capacity. Total monthly fixed obligation including all overhead and debt service. This is on the P&L for interest and overhead. Add principal payments to make it complete.
Layer 3: Required Gross Margin Dollars. Layer 1 plus Layer 2. This is the total gross margin dollar figure the business must produce to fund everything above breakeven.
Layer 4: Intended Gross Margin percent. The margin percentage the pricing model was designed to deliver. Not realized. Intended.
Layer 5: Breakeven Sales Volume. Layer 3 divided by Layer 4. This is the revenue number the business must hit at the intended margin to fund MMP and Fixed Cost Capacity.
Why Most Breakeven Calculations Are Wrong
Standard accounting breakeven divides fixed costs by contribution margin. That produces the sales volume required to cover fixed costs at the current margin.
The problem is that standard accounting fixed costs do not include principal payments, do not include working capital replenishment, do not include retirement funding, and do not include the market-rate owner comp gap. That is four of the five MMP sub-layers missing.
A breakeven of $2.4 million by standard accounting can be a real breakeven of $3.1 million once MMP is included. The business that thinks it broke even at $2.5 million actually lost against its real floor.
This is the exact math behind the machine shop field note. The P&L breakeven was hit. MMP breakeven was not.
Realized vs Intended in Layer 4
The bottom-up math uses Intended Gross Margin percent in Layer 4. That is the pricing model's assumption.
If Realized Gross Margin is running below Intended (which it usually is due to the cascade effect), the real breakeven is even higher than the Layer Cake number. Recalculate Layer 5 with Realized in place of Intended. The result is the volume required at actual delivery, not at pricing-model delivery.
In a typical trades business, the difference is 10 to 20 percent. A business with an Intended breakeven of $2.4 million can have a Realized breakeven of $2.7 to $2.9 million. That is the volume the business actually needs to hit to fund MMP.
Frequently Asked Questions
Do I run breakeven monthly or annually?
Both. Annual breakeven for planning. Monthly breakeven for management. If monthly breakeven is not being cleared, the business is subtracting from working capital in real time and the pattern needs to be addressed within the current quarter.
What if my current sales are below breakeven?
Then the business is losing money against its real floor even if the P&L shows a profit. Options: raise pricing to fund the current cost structure, cut fixed costs to lower the floor, or restructure the debt to reduce Layer 2. Do all three if the gap is large.
Is breakeven the same as profit target?
No. Breakeven is the floor. Profit target is above the floor. A healthy business hits breakeven and then produces additional gross margin dollars above it for reinvestment, retirement funding, and reserve building.
Can breakeven change month to month?
Yes, and it should be recalculated any time a material change hits the business. New debt, new hire, supplier price change, or interest rate move all shift breakeven. Businesses that recalculate stay aligned. Businesses that treat breakeven as fixed drift into the gap silently.