Break-Even Calculator
Use fixed costs divided by contribution margin per unit to estimate the sales volume and sales revenue needed to break even, then pressure-test the same cost structure with a planned sales assumption to see margin of safety and projected profit.
Break-Even Inputs
Enter costs, price, and an optional sales plan.
Quick Scenarios
Break-Even Summary
Wide buffer above break-even
1,111.11 units
Break-even revenue: $83,333.33. The contribution margin and sales plan leave a more resilient cushion.
Contribution margin / unit
$45
Contribution margin ratio
60%
Margin of safety
44.44%
Expected profit
$40,000
The current plan sits well above break-even with a 44.44% margin of safety. Keep pressure-testing price, volume, and variable-cost assumptions so the wide buffer is not just an optimistic forecast.
Current plan: 2,000 units and $150,000 of revenue. That equals $45 of contribution margin per unit before fixed costs.
Detailed Breakdown
This section substitutes your current inputs into the break-even math so you can verify where the unit hurdle, revenue hurdle, and projected cushion come from.
Contribution margin per unit
$75 - $30
Result: $45
Break-even units
$50,000 / $45
Result: 1,111.11 units
Break-even revenue
1,111.11 x $75
Result: $83,333.33
Planning translation
Margin of safety = $150,000 - $83,333.33
Expected profit = (2,000 x $45) - $50,000
Result: 44.44% margin of safety and $40,000 of projected profit
| Metric | Value |
|---|---|
| Fixed costs | $50,000 |
| Variable cost per unit | $30 |
| Selling price per unit | $75 |
| Contribution margin ratio | 60% |
| Break-even units | 1,111.11 |
| Break-even revenue | $83,333.33 |
| Planned sales units | 2,000 |
| Planned sales revenue | $150,000 |
| Expected profit | $40,000 |
Assumption notes
- Selling price and variable cost are treated as stable at the current volume assumption.
- Mixed product lines need a weighted average contribution margin instead of one SKU-level input set.
- Fixed costs should include the expenses you truly need the plan to recover, including owner pay if that matters to the decision.
Current scenario highlights
- Status: Wide buffer
- Every sold unit contributes $45 before fixed costs.
- Break-even revenue hurdle: $83,333.33
Editorial & Review Information
Reviewed on: 2026-03-12
Published on: 2025-10-19
Author: LumoCalculator Editorial Team
What we checked: Formula math, contribution-margin logic, example arithmetic, boundary statements, and source accessibility.
Purpose and scope: This page supports pricing, launch planning, and operating-buffer review. It is not a replacement for a full financial model, cash-flow forecast, or multi-product budgeting system.
How to use this review: Keep one unit definition, one cost boundary, and one planning period consistent each time you run the tool. That makes the break-even comparison more useful than a one-off number.
Use Scenarios
Launch or campaign planning
Translate fixed launch spend into the minimum unit volume required before committing ad budget, sales headcount, or one-time production setup.
Pricing pressure test
Compare current price, variable cost, and planned volume to see whether the offer only survives on optimistic sales assumptions.
Margin-first target setting
If leadership starts with a target margin rather than a target price, use the Reverse Margin Calculator first, then return here to see how that price changes the break-even hurdle.
Formula Explanation
1) Contribution margin per unit
Contribution margin per unit = Selling price per unit - Variable cost per unit
This is the amount each sale contributes toward fixed costs before any profit appears. Break-even analysis only works when this number is positive.
2) Break-even units
Break-even units = Fixed costs / Contribution margin per unit
This is the minimum unit count required to cover the fixed cost base under the current price and variable-cost assumptions.
3) Break-even revenue
Break-even revenue = Break-even units x Selling price per unit
This turns the unit hurdle into a sales-dollar hurdle, which is often easier to compare with a sales forecast or budget target.
4) Margin of safety and projected profit
Margin of safety = Planned sales - Break-even sales
Expected profit = (Planned units x Contribution margin per unit) - Fixed costs
These calculations turn the break-even line into a planning view: how much room the forecast has above the line and how much profit remains if the plan actually happens.
How to Read the Result
These ranges describe planning cushion, not a universal rule. Different industries can tolerate very different break-even buffers.
Below 0% margin of safety
The plan does not yet cover the fixed-cost base. Treat the shortfall as an action list for price, cost, or volume, not as a viable operating plan.
0% to 15%
The business is technically above break-even, but there is little room for discounting, delivery slippage, or demand misses.
15% to 35%
A workable buffer for many operating plans, though the forecast still needs active monitoring if fixed costs are high or demand is volatile.
Above 35%
A wider cushion means the plan can absorb more variation, but the real test is whether volume, pricing, and variable cost assumptions are still realistic.
Break-even analysis tells you the minimum sales line, not how sensitive profit becomes once you move above that line. If the fixed-cost mix itself is the real question, compare the result with the Operating Leverage Calculator instead of using break-even alone.
Example Cases
Case 1: DTC launch with healthy unit economics
Inputs
- Fixed costs: $50,000
- Variable cost / unit: $30
- Selling price / unit: $75
- Planned sales: 2,000 units
Computed Results
- Break-even units: 1,111.11
- Break-even revenue: $83,333.33
- Margin of safety: 44.44%
- Expected profit: $40,000
Interpretation
The plan sits meaningfully above break-even because each sale contributes enough margin to recover the fixed launch spend before the forecasted volume is exhausted.
Decision Hint
Use the buffer to test discounts carefully, but keep watching paid-acquisition cost so contribution margin does not quietly shrink.
Case 2: Training cohort with a thin first-run cushion
Inputs
- Fixed costs: $18,000
- Variable cost / unit: $40
- Selling price / unit: $125
- Planned sales: 220 units
Computed Results
- Break-even units: 211.76
- Break-even revenue: $26,470.59
- Margin of safety: 3.74%
- Expected profit: $700
Interpretation
This cohort launch clears break-even, but only by a narrow margin. A few unfilled seats or one heavier delivery cost can erase most of the projected profit.
Decision Hint
Treat this as a pricing and fill-rate warning, not as proof the launch is comfortably profitable.
Case 3: Agency plan forecasted in revenue
Inputs
- Fixed costs: $85,000
- Variable cost / unit: $1,800
- Selling price / unit: $6,500
- Planned sales: $156,000
Computed Results
- Break-even units: 18.09
- Break-even revenue: $117,553.19
- Margin of safety: 24.65%
- Expected profit: $27,800
Interpretation
A revenue-led service forecast can still be mapped back into break-even units. In this setup, the plan stays above the break-even line with a workable operating cushion.
Decision Hint
If leadership budgets revenue first, use this translation to see how many equivalent projects must actually close.
Boundary Conditions
Sources & References
- U.S. Small Business Administration - Break-even point calculator - Official formula framing, fixed-versus-variable-cost context, and startup-planning interpretation.
- Omni Calculator - Break-even Calculator - Step-by-step worked-example structure, contribution-margin explanation, and practical break-even interpretation.
- CalcXML - Breakeven Analysis Calculator - Calculator-first planned-sales framing and anticipated-volume interpretation.