Break Even Calculator

Break-Even Calculator

This calculator tells you exactly how many units you must sell -- and how much revenue you must generate -- before your business stops losing money. Enter your total fixed costs, variable cost per unit, and selling price to see your break-even point in units and dollars, your contribution margin per unit, and your contribution margin ratio. This is the starting point for any serious pricing or business planning conversation.

How Break-Even Is Calculated

The break-even formula divides your fixed costs by the amount each sale contributes toward covering them:

• Contribution Margin per Unit = Selling Price - Variable Cost per Unit
• Break-Even Units = Fixed Costs / Contribution Margin per Unit
• Break-Even Revenue = Break-Even Units x Selling Price
• Contribution Margin Ratio = Contribution Margin per Unit / Selling Price

Once unit sales exceed the break-even point, every additional unit sold generates profit exactly equal to the contribution margin per unit. The contribution margin ratio tells you what percentage of each revenue dollar flows toward covering fixed costs and then profit.

Worked Examples

Scenario 1 -- E-commerce product: A seller has $8,000/month in fixed costs (warehouse, software, salaries). Each product sells for $45 and costs $18 to produce and ship. Contribution margin = $27. Break-even = 297 units per month ($8,000 / $27), or $13,365 in monthly revenue. Any unit sold beyond 297 adds $27 straight to profit.

Scenario 2 -- Service business (consulting): A two-person consulting firm has $15,000/month in fixed overhead. They charge $200/hour and have $20/hour in variable costs (contractors, software). Contribution margin = $180/hour. Break-even = 83.3 hours billed per month ($15,000 / $180), or about 42 hours per consultant per month.

Scenario 3 -- Restaurant: A small restaurant carries $22,000/month in fixed costs (rent, salaried staff, insurance). Average check is $38, and food plus variable labor costs average $16 per cover. Contribution margin = $22. Break-even = 1,000 covers per month ($22,000 / $22), or roughly 33 paying customers per day across 30 days.

Reference Table

When to Use

• Before launching a new product or service to validate that the pricing model can realistically cover costs
• When considering a price cut to gain market share -- the calculator shows how many extra units are needed to offset the lower margin
• When negotiating a lease or adding a fixed-cost employee, to quantify exactly how much the break-even point rises
• Preparing financial projections for a bank loan or investor deck that requires a clear path to profitability
• During annual planning to set a minimum revenue target that the sales team must hit before the business operates in the black

Common Mistakes

1. Misclassifying costs as fixed when they are variable. Hourly wages, sales commissions, and payment processing fees scale with volume -- including them as fixed costs will understate your true break-even point.
2. Using gross revenue instead of net revenue. If you offer discounts, refunds, or charge-backs, calculate your variable cost and selling price using the net amount you actually collect, not the sticker price.
3. Ignoring multiple products. A simple break-even calculator assumes one product at one price. If you sell several products with different margins, calculate a weighted average contribution margin or run a separate analysis per product line.
4. Not updating when costs change. Adding one $60,000/year employee raises monthly fixed costs by $5,000. At a $25 contribution margin, that is 200 more units per month you must sell just to stay even -- always re-run after any significant cost change.

Current Context for 2026

Commercial rent remains elevated in most major U.S. markets following post-pandemic lease resets, which has pushed up fixed cost baselines for brick-and-mortar businesses. Businesses signing new leases in 2025-2026 are generally facing 10-20% higher monthly fixed costs than peers who locked in pre-2022 rents. Variable costs for physical goods have stabilized but remain above 2019 levels. For digital and service businesses, fixed costs are more controllable, but SaaS tooling subscriptions have crept up meaningfully. If your break-even revenue is within 20% of your typical monthly revenue, your margin of safety is thin -- consider reducing fixed costs or raising prices before adding headcount.

Tips

1. Run three scenarios -- worst case (variable costs up 10%, price flat), expected, and best case -- to understand your risk band before committing to fixed overhead
2. If your contribution margin ratio is below 25%, raising the selling price is almost always more effective than cutting variable costs at small volumes
3. Re-calculate your break-even any time fixed costs change by more than $1,000 per month -- the compounding effect on required unit volume surprises most business owners
4. Use the break-even revenue figure as a floor for your monthly sales target, then add a 20-25% margin of safety as the real goal
5. For seasonal businesses, calculate break-even monthly rather than annually -- a business that looks profitable annually can be deeply unprofitable during slow months
6. If your break-even point requires more units than your realistic market can support, that is a pricing problem -- not a volume problem

Related Calculations

• Profit Margin Calculator -- once you clear break-even, use this to measure how profitable each additional sale actually is
• ROI Calculator -- evaluate the return on a specific capital investment relative to the fixed cost increase it causes
• Tax Calculator -- after reaching profitability, estimate the tax liability on your net business income