Problem This Solves
Pricing decisions at most companies are driven by two antagonistic forces: finance teams allocate costs to determine how high prices must be, while sales teams analyze buyers to determine how low prices must be. Neither approach optimizes profitability. Managers approve price cuts to protect sales or raise prices to recover costs with little or no analysis of the financial impact. The result is systematic mispricing: profitable discount opportunities are rejected because they fail to cover fully allocated average costs, and unprofitable price cuts are approved because no one calculated the volume increase required to compensate for lost margin.
Key Principle
The profitability of any price change depends on two things only: (1) the incremental, avoidable costs that change with the decision, and (2) the market's volume response to the price change. The breakeven sales change formula quantifies the minimum volume response required:
%BE = -DP / (CM + DP)
Where DP is the price change and CM is the original contribution margin (price minus variable cost). When variable costs also change: %BE = -(DP - DC) / (CM + (DP - DC)), or equivalently %BE = -DCM / New CM.
For reactive pricing (responding to a competitor's move): Reactive %BE = Change in price / Contribution margin.
The relevant costs for pricing must be both incremental (they change as a result of the pricing decision) and avoidable (they have not yet been irreversibly incurred). Costs should be valued at replacement cost (NIFO), not historical cost.
Good Examples
Music Festival Student Rush: A $50 student ticket (well below $85 average total cost) generates $2,200 incremental profit on only $3,000 incremental revenue (73% contribution margin) because performer, venue, and overhead costs are not incremental to the additional 100 student tickets. The discount is fenced to bona fide students purchasing 24 hours before the performance, minimizing cannibalization of $100 full-price tickets.
Ritter Nursery Seasonal Pricing: A wholesale potted plant producer discovered that off-peak mums cost only $1.60/unit in incremental costs (no capital cost with excess greenhouse capacity), while peak-season mums cost $3.40/unit (including $1.80 incremental capital for new greenhouse space). This justified a 5% off-peak price cut targeted at large buyers (breakeven: 9.3% volume increase) and a 10% peak-season price increase (breakeven: 22.2% sales decline tolerable when avoided greenhouse construction is included).
Westside Manufacturing Scenario Analysis: Rather than relying on a single-point volume estimate, managers mapped nine "what if" scenarios ranging from 0% to 40% volume change for a 5% price cut. This revealed that the true breakeven (including $800 incremental semifixed costs) required a 17.5% volume increase, not the 12.5% from the contribution-only formula.
Bad Examples
Absorption Cost Rejection: Companies using fully allocated "absorption cost" accounting reject both the Friday performance ($85 ticket vs. $85.67 average cost) and the Student Rush ($50 ticket vs. $85.45 average cost) as unprofitable -- even though both generate positive incremental profit contribution.
Sunk Cost Pricing: A firm that overestimated product value and invested too heavily tries to raise prices to cover sunk R&D and capital costs. This only reduces volume further, making losses worse. The sunk costs do not change regardless of which price is chosen.
Historical Cost Mispricing: An oil company prices gasoline based on the historical cost of crude oil in its tanks rather than the replacement cost. When crude prices rise, it underprices relative to true incremental cost. When crude prices fall, it overprices and is undercut by competitors pricing on replacement cost.
Uniform Cost Allocation: Ritter's original policy charged every mum $0.77 in capital cost regardless of season, even though off-peak mums required zero incremental capital. This led to uniform pricing that failed to capture peak-season value or compete effectively in off-peak periods.
Key Quotes
"A company's margin goals, return on capital goals, and operating profit goals are, or at least should be, entirely irrelevant to pricing decisions."
"The goal of pricing is not to make higher priced sales; it is to make higher profit sales."
"One should never be deceived into thinking that low-price sales are necessarily low-profit sales. In some cases, they make a disproportionately large contribution to profit because they make a small incremental addition to costs."
"The key to profitable pricing is to recognize that customers in the marketplace, not costs, determine what a product can sell for."
"Rather than asking, 'What is the firm's demand elasticity?' we ask, instead, 'What is the minimum demand elasticity required?' to justify a particular pricing decision."
"Short-sighted efforts to build non-incremental fixed and sunk costs into a price to justify regretted investments made in the past will only reduce volume further, making the losses worse."
Rules of Thumb
Use the breakeven formula before any price change. Calculate the minimum volume response required, then demand evidence that the threshold is achievable. Ask advocates of price cuts: "How much would volume have to increase to make this profitable?"
Costs must pass two tests to be relevant: they must be incremental (change with the decision) and avoidable (not yet irreversibly committed). Variable costs are always incremental; fixed costs are incremental only if they change as a direct result of the pricing decision.
Do not equate avoidable with variable or sunk with fixed. In airlines, fixed capital costs are often avoidable (planes can be sold). In lease-bound businesses, variable-seeming costs may be locked in.
Price on replacement cost (NIFO), not historical cost. The relevant cost is what it will cost to replace inventory, not what was paid in the past.
Account for cannibalization as an opportunity cost. Subtract the revenue lost from full-price sales that migrate to a discount from the incremental revenue calculation.
Use breakeven sales curves to visualize multiple price options simultaneously. Plot the breakeven volume for each potential price change; the area to the right of the curve represents profitable decisions.
In growing or declining markets, use projected sales as the baseline, not current sales. Using current sales understates the required breakeven volume change.
The larger the price change or the smaller the contribution margin, the greater the required volume response. High-margin products absorb price changes more easily than low-margin products.
For reactive pricing, the question flips: "How much volume will we lose if we don't respond?" Compare expected sales loss from inaction against the contribution impact of matching the competitor's price.
Always quantify short-term financial impact first, even when long-term strategic considerations may override the result. Sometimes long-term competitive strategies are not worth the short-term cost.
Related References
- Price Level: Skim, Penetrate, or Neutral -- choosing where in the viable price range to set the price
- Managing Price Competition -- reactive pricing, competitive signaling, and when to match competitor moves
- Price Structure: Configurations, Metrics, and Fences -- price fences and segmented pricing to minimize cannibalization
- Economic Value Estimation (EVE) Model -- estimating customer willingness to pay before incurring costs
- Measuring Price Sensitivity -- techniques for assessing whether breakeven volume thresholds are achievable