Choose a price-volume-cost scenario and measure its margin effect

The task is not merely to calculate margin. It is to choose among coherent commercial configurations: maintain price, grant a discount, support a promotion, change the mix or limit committed volume.

Each option states the expected decision, segment, channel, period and success condition. A margin target without volume, cost and timing assumptions cannot justify the choice.

Every scenario uses the same unit, currency, period and cost scope. Net selling price per unit is stated excluding taxes, after discounts and rebates; collection timing belongs in the cash plan.

Class each scenario-specific item by behaviour: add fixed or flat-rate spending to relevant fixed costs, and variable spending to unit variable cost. Class commissions according to their nature.

Unit contribution margin is net price minus unit variable cost, including scenario-specific variable spending. Total contribution margin multiplies that amount by volume. Scenario profit then subtracts relevant fixed costs, including scenario-specific fixed spending.

Break-even units divide relevant fixed costs by positive unit contribution margin and round up to a whole unit. With several products, the sales mix and margin scope must be explicit before comparison.

The compensating threshold answers a different question: what minimum volume preserves the reference total contribution after a price or cost change? Divide reference total contribution by the new positive unit contribution margin and round up to a whole unit. It is a decision threshold, not a demand forecast.

• Unit contribution margin = net price − unit variable cost, including specific variable spending
• Total contribution margin = unit margin × volume
• Profit = total contribution margin − relevant fixed costs
• Break-even units = relevant fixed costs ÷ positive unit margin, rounded up
• Compensating threshold = reference total contribution ÷ new positive unit contribution margin, rounded up

In this example, unit variable cost remains €60 and fixed costs €25,000. Volumes are not forecasts: they are three assumptions that require evidence and a capacity check.

At €95, the scenario must reach at least 1,143 units to preserve the base scenario’s €40,000 total contribution margin. A volume of 1,150 creates only a €250 advantage before any extra spending, so the volume evidence is decisive.

Vary net price, volume, unit variable cost, fixed costs and promotion spending separately. Then identify the exact threshold at which the preferred option changes.

When elasticity has not been observed, do not invent it. Retain several volume assumptions, state their sources and define the field evidence needed before a larger commitment.

The final note states the selected scenario, decisive assumptions, accepted trade-off, minimum volume, capacity limits and signals that trigger review. The calculation prepares the decision; it does not make it for the accountable people.

The selected scenario can then feed the business plan and financial projection. That downstream step examines profit, operating working capital, cash and funding without confusing commercial margin with available liquidity.

• Selected scenario and rejected alternatives
• Assumptions, sources and owners
• Volume or margin threshold
• Accepted risk and available capacity
• Date, signal and owner of the next review

Each workspace answers a specific question and contributes to the same decision file. Combined information remains sourced and checked before the trade-off.