What Break-Even Means
The break-even point is the volume of sales at which total revenue equals total costs — neither profit nor loss. Selling one unit beyond break-even = your first dollar of profit for the period. Selling one unit below = you're still losing money on operations.
The Microapp Break-Even Calculator computes the standard break-even formula plus the two related contribution-margin numbers that explain WHY break-even is where it is.
• Fixed costs: $10,000/month (developer salary, hosting, software subs)
• Price: $50/month per customer
• Variable cost: $5/month per customer (Stripe fees, support time, hosting per-customer overhead)
• Contribution margin = $50 − $5 = $45/customer
• Break-even = $10,000 / $45 = 223 customers
Every customer past 223 is $45/month of profit. At 500 customers, monthly profit = (500 − 223) × $45 = $12,465.
The Formula, Broken Down
Break-even units = Fixed costs / (Price per unit − Variable cost per unit)
The denominator (Price − Variable cost) is the contribution margin per unit — the part of each sale that goes toward covering fixed costs. Once fixed costs are covered, every additional contribution margin becomes profit.
Break-even revenue = Break-even units × Price per unit. Same fact expressed differently.
Fixed vs Variable Costs — Sorting the Real Ones
| Cost | Usually classified as | Why |
|---|---|---|
| Office rent | Fixed | Same regardless of sales volume |
| Salaried employees | Fixed | Pay is the same whether they make 1 sale or 1,000 |
| Software subscriptions (SaaS, hosting) | Fixed (mostly) | Tier-based; usually flat unless you cross a tier |
| Insurance, licenses | Fixed | Annual or quarterly payments unrelated to volume |
| Materials (per-unit) | Variable | Each unit produced consumes raw materials |
| Shipping & fulfillment | Variable | Each shipment costs money |
| Payment processing (Stripe etc.) | Variable | Per-transaction percentage |
| Hourly contractor labor | Variable | You pay for hours worked, which scales with volume |
| Sales commissions | Variable | Per sale |
| Electricity, water | Mixed | Fixed base + variable use; split if material |
Contribution Margin and What It Tells You
Contribution margin per unit ($) = Price − Variable cost. This is the gross dollars each sale generates after the direct cost of fulfilling that sale.
Contribution margin ratio (%) = Contribution margin / Price. This is the fraction of each sale dollar that goes toward fixed costs and profit. A 60% contribution margin ratio means $0.60 of every dollar of revenue contributes toward your overhead.
Higher contribution margin ratios = healthier business. Software typically has 70-90% contribution margins (very low variable cost). Manufacturing might have 30-50%. Restaurants often have 60-70% on food sales.
What to Do With the Break-Even Number
If your break-even is achievable with current sales effort: good. Focus on growing past it efficiently.
If your break-even feels too high (you'd need 10x current sales to hit it): three levers — lower fixed costs (cut overhead), raise price (test elasticity), or lower variable cost (renegotiate suppliers, improve operational efficiency). Pricing usually has the highest leverage.
If your contribution margin is razor-thin (5-10%): small variable-cost increases will wipe out profitability. You're vulnerable to material-price spikes, currency moves, or carrier fee increases. Either raise prices or find structural cost improvements.
If you're well past break-even: congratulations. The next question is: how to scale fixed costs less than proportionally to revenue, so contribution margin becomes increasingly profit (operating leverage).
Common Pitfalls
Forgetting your own salary. Solo founders often exclude their own time as a "cost" — but if you're spending 40 hours/week on the business, the opportunity cost (or replacement cost if you needed to hire) is real. Include a market-rate salary for yourself in fixed costs to get an honest break-even.
Confusing accounting profit with cash flow. Break-even tells you when revenue covers operating costs. It doesn't tell you when you'll have cash in the bank — that depends on how customers pay (immediate vs net-30), inventory cycles, and capex. Many businesses break even on paper while running out of cash.
Static thinking. Costs and prices change over time. Re-run break-even quarterly, especially after price changes, supplier renegotiations, or hiring decisions.
Ignoring product mix. If you sell multiple products with different margins, simple break-even uses a weighted-average contribution margin. Selling more of your high-margin product lowers break-even; more of your low-margin product raises it.
Educational Tool — Not Financial Advice
This calculator computes the standard textbook break-even formula. It doesn't account for taxes, depreciation, financing costs, working capital tied up in inventory, or any of the other complications real-world businesses navigate. For financial and accounting decisions, consult a CPA or financial advisor with full visibility into your specific business.
Related Tools
For projecting loan payments needed to fund fixed costs, use the Loan Calculator. For modeling investment growth on retained earnings, the Compound Interest Calculator handles compounding. For raw percentage math (margin computations, growth rates), see the Percentage Calculator.