Price-change and volume break-even calculator
How much can sales change after a price move?
See the volume a price increase can lose, or the additional sales a discount needs, to preserve current profit. Compare the financial threshold with your own assumptions about demand.
Start with one product and one period.
Use the price actually retained and the costs that vary with sales. Enter the affected product or customer group separately if the change applies to only part of your business. Calculations run in your browser.
Financial arithmetic · year
20% volume loss at break-even
8,000units at the profit-neutral threshold
Approximate continuous volume. If sales use whole units, at least 8,000 match or exceed current modeled profit.
Above the threshold, modeled profit improves. Below it, modeled profit declines.
This is a financial threshold, not a prediction of customer behavior. Matching current profit does not establish that the business covers all its costs.
- Revenue-neutral volume
- 9,090.919.09% loss in volume
- Profit change at unchanged volume
- +$100,000.00After $0.00 in added costs
| Measure | Current | Proposed |
|---|---|---|
| Realized price | $100.00 | $110.00 |
| Variable cost, including fees | $60.00 | $60.00 |
| Contribution | $40.00 | $50.00 |
| Contribution / price | 40% | 45.45% |
Current total revenue: $1,000,000.00. Current contribution before existing fixed costs: $400,000.00.
Formula and assumptions report
Contribution per unit = realized price × (1 − revenue fee rate) − other variable cost.
Profit-neutral volume = (current unit contribution × current volume + added fixed and one-time costs) ÷ proposed contribution per unit.
Current fixed costs cancel when comparing periods with the same baseline. Only their change is needed. The result is not absolute operating profit.
20% volume loss at break-even
Conditional scenarios
What if volume changes?
The price and costs stay as entered. Only sales volume changes. The line shows modeled profit change, including any added fixed costs.
Dashed vertical line: break-even, when shown. Solid dot: your base assumption, when enabled. Zero on the vertical axis means no change in profit.
Volume response is unknown
Calculate the threshold first.
Then use the optional volume assumptions to compare outcomes. The table uses illustrative responses of −25%, 0%, and +25% until you enter your own.
Check whether the required volume is feasible. Additional shifts, capacity, changes in product mix, or customers switching to another product require a separate model.
Choose evidence for the demand question| Volume scenario | Volume | Revenue | Contribution | Profit change |
|---|---|---|---|---|
| Illustrative: -25% | 7,500 | $825,000.00 | $375,000.00 | -$25,000.00 |
| Illustrative: 0% | 10,000 | $1,100,000.00 | $500,000.00 | +$100,000.00 |
| Illustrative: 25% | 12,500 | $1,375,000.00 | $625,000.00 | +$225,000.00 |
| Profit-neutral threshold: -20% | 8,000 | $880,000.00 | $400,000.00 | $0.00 |
Contribution = revenue less variable costs. Profit change = change in contribution less added fixed and one-time costs. Existing fixed costs are not entered, so absolute profit is not shown.
The next research question
How will customers respond at that price?
The calculator tells you the volume needed. Evidence about customer response must come from your market, offering, and decision period.
Discuss a pricing studyWe have transaction data or can run a price test
Review previous price changes alongside promotions, availability, seasonality, and competitor activity. A controlled price test can isolate a response when its design and operating conditions support that comparison. Check whether the evidence applies to the proposed change.
Pricing research and market simulationWe need stated response or price perceptions
Gabor–Granger asks about purchase response at specified prices. Van Westendorp asks about price perceptions. Neither automatically establishes realized sales or profit. First establish which question your study needs to answer.
Survey pricing methodsFeatures, competitors, or bundles change the choice
Choice-based conjoint can examine price alongside other features and alternatives. A useful market simulation also needs assumptions about the competitive setting and validation for the intended decision.
Methods and limits
What the threshold includes.
How is the profit-neutral volume calculated?
Unit contribution is realized price less variable cost, including any separately entered percentage fee. Multiply current unit contribution by current volume, add the fixed-cost change and one-time cost, then divide by proposed unit contribution.
This matches current modeled profit. It differs from the usual zero-profit break-even point. Existing fixed costs cancel in the comparison; absolute profit is not calculated. Accounting reference.
Why can revenue fall while profit improves?
A lost sale removes revenue and the variable cost of that sale. Revenue-neutral volume is current revenue divided by proposed price. In the starting example, 8,000 sales at 110 produce 880,000 in revenue and 400,000 in contribution. Contribution matches the baseline even though revenue falls by 120,000. Sensitivity analysis.
What happens at zero or negative contribution?
Ordinary allowable-loss advice is withheld if current or proposed unit contribution is not positive. Scenarios still show a change relative to the baseline; that change is not proof of profitability.
If fixed-cost savings exceed current contribution, every nonnegative volume improves the modeled baseline. Confirm those savings would actually occur at very low sales.
When does this model need more detail?
Prices and per-unit costs must remain meaningful across the volumes compared. Capacity limits, step costs, changing sales mix, cannibalization, taxes, and financing are outside this calculation. It does not optimize price or estimate demand uncertainty.
For subscriptions, use paid accounts for one consistent period. Churn, upgrades, acquisition, and lifetime economics require a cohort model. One-time costs are charged once within the chosen period. Model assumptions.
Sources and calculation policy
Sources reviewed September 29, 2026. Displayed values are rounded; the report includes unrounded volume thresholds. Whole-unit requirements round upward.
- ACCA: Cost-volume-profit analysis
Contribution and cost-volume-profit assumptions within a relevant operating range.
- OpenStax: Single-product break-even sensitivity analysis
Sensitivity to price, volume, variable costs, and fixed costs.
- ACCA: Relevant costs
Costs that change with a decision, including care with allocated overhead.
- McKinsey: The power of pricing
Realized transaction price after discounts and concessions.
- Sawtooth Software: Pricing research techniques
Survey approaches that address different pricing questions.