Calculadora BE (Break-Even)
Use this tool to estimate how many units you need to sell to cover all costs, and to understand whether your expected sales volume will generate profit or loss.
What Is a Calculadora BE?
A calculadora BE (break-even calculator) helps you answer one of the most important business questions: How much do I need to sell to stop losing money? The break-even point is where total revenue equals total costs. At that point, your profit is exactly zero.
Whether you run a small online shop, a service business, or a growing startup, understanding this number gives you a practical target. It helps you set prices, control expenses, and make better monthly decisions.
How the Break-Even Formula Works
The idea is simple: every sale contributes a small amount toward paying your fixed costs. That contribution is called the contribution margin.
Break-Even Units = (Fixed Costs + Target Profit) ÷ Contribution Margin per Unit
If your contribution margin is small, you need a lot of sales to break even. If your contribution margin is strong, you reach break-even faster.
Inputs in This Calculator
- Fixed Costs: expenses that do not change with sales (rent, salaries, software subscriptions, insurance).
- Selling Price per Unit: average price customers pay for each unit sold.
- Variable Cost per Unit: direct cost per unit (materials, packaging, transaction fees, shipping subsidies).
- Target Profit: optional extra amount you want to earn above break-even.
- Expected Sales Units: optional estimate for comparing forecasted sales against break-even needs.
Example: Quick Scenario
Suppose your monthly fixed costs are $5,000. You sell each product for $50, and your variable cost is $20. Your contribution margin per unit is $30.
Break-even units = $5,000 ÷ $30 = 166.67 units, which means you must sell at least 167 units to be safely above break-even.
If you also want a $2,000 monthly profit, your target becomes: (5,000 + 2,000) ÷ 30 = 233.33 units. So your minimum target is 234 units.
How to Improve Your Break-Even Point
After you run the numbers, your next move is action. Focus on levers with the biggest effect:
- Increase selling price when your market supports higher value positioning.
- Reduce variable costs by renegotiating suppliers or improving production efficiency.
- Cut unnecessary fixed costs to lower the baseline you must cover every month.
- Improve product mix by promoting higher-margin offerings.
- Use realistic sales forecasts to avoid overestimating your margin of safety.
Common Mistakes to Avoid
1) Ignoring “hidden” variable costs
Payment processing fees, returns, refunds, and support costs can quietly reduce margin. Include them in variable cost estimates so your break-even number is not artificially low.
2) Mixing annual and monthly data
Keep all numbers on the same time basis. If fixed costs are monthly, use monthly sales targets and monthly profit goals.
3) Using only one scenario
Test best-case, expected-case, and worst-case assumptions. Scenario planning gives better strategic clarity than a single estimate.
When Break-Even Analysis Is Not Enough
Break-even is a great starting point, but it does not capture cash timing, debt obligations, taxes, or seasonality. For complete planning, combine this calculator with:
- Cash flow projections
- Monthly profit and loss tracking
- Sensitivity analysis (price and cost changes)
- Customer acquisition and retention metrics
Final Takeaway
A calculadora BE turns financial uncertainty into a clear target. Use it regularly—especially when prices, costs, or demand change. The more frequently you revisit your numbers, the faster you can adjust and protect your margins.