What is a Break-Even Point?
Your break-even point is the sales level at which total revenue exactly equals total costs — you make no profit and no loss. It is the single most important number for any small business or e-commerce store because it tells you the minimum you must sell each month just to keep the lights on. Sell one unit beyond break-even and you start earning profit; sell one below and you are losing money.
A break-even analysis separates your costs into two buckets: fixed costs (rent, software, salaries, insurance — expenses that stay the same regardless of how much you sell) and variable costs (cost of goods, packaging, and shipping that rise with each unit). The gap between your selling price and your variable cost per unit — the contribution margin — is what funds your fixed costs and, eventually, your profit.
How to Use This Break-Even Calculator
Enter your monthly fixed costs, your variable cost per unit, and your selling price per unit. Optionally add a target profit to see how many units you must sell to clear a specific profit, not just break even. The calculator instantly returns your break-even units and revenue per month, your contribution margin per unit and as a percentage, and a color-coded health signal — green above 30%, amber from 15–30%, and red below 15%. If your selling price does not exceed your variable cost, you will see a friendly error, because no sales volume can produce a profit in that case.
Break-Even Formula Explained with a Real Example
Contribution Margin = Selling Price − Variable Cost per Unit. Break-Even Units = Fixed Costs ÷ Contribution Margin. Break-Even Revenue = Break-Even Units × Selling Price. To include a profit goal: Units for Target = (Fixed Costs + Target Profit) ÷ Contribution Margin.
Worked example: You sell a product for $35, your cost of goods is $12, and your fixed costs are $800/month. Your contribution margin is $35 − $12 = $23 per unit (about a 65.7% margin). Break-even units = $800 ÷ $23 ≈ 35 units per month, or roughly $1,217 in revenue. If you also want $1,000 of monthly profit, you would need ($800 + $1,000) ÷ $23 ≈ 79 units.
What is Contribution Margin and Why Does It Matter?
Contribution marginis the portion of each sale left over after variable costs — the money that "contributes" to covering fixed costs and generating profit. A higher contribution margin means each sale does more work, so you break even on fewer units and you are more resilient to slow months. As a percentage, contribution margin tells you the share of every dollar of revenue available to cover overhead: at 65.7%, about 66 cents of each dollar goes toward fixed costs and profit. Businesses with thin margins (under 15%) must sell large volumes to survive, while those above 30% have far more breathing room. Tracking contribution margin per product also reveals which items deserve more marketing and which quietly drain your business.
Break-Even Analysis for E-Commerce — What's Different?
E-commerce sellers often miscalculate break-even because they forget hidden per-unit costs. Your true variable cost should include not just the product cost but also shipping, packaging, payment processing (roughly 3% per order), and marketplace or platform fees on sites like Amazon, Etsy, or Shopify. Returns are another silent margin-killer: a 5–10% return rate effectively raises your variable cost on every unit. Build these into your variable cost figure and your break-even point becomes realistic. Many sellers who think they break even at 30 units actually need 45 once shipping, fees, and returns are included.
How to Lower Your Break-Even Point
There are three levers. First, raise your selling price — even a small increase widens your contribution margin and lowers break-even units, often with little effect on demand. Second, reduce variable costs by negotiating supplier pricing, buying in bulk, cutting packaging waste, or lowering shipping costs through better carriers. Third, trim fixed costs — downgrade unused software subscriptions, renegotiate rent, or move to usage-based tools while you scale. Because break-even units = fixed costs ÷ contribution margin, improving either side of that ratio brings the finish line closer.
Common Mistakes to Avoid
The biggest mistake is treating variable costs as only the product cost, ignoring shipping, fees, and returns — which makes break-even look far easier than it is. Another is mixing fixed and variable costs, such as counting a flat monthly software fee as a per-unit cost. Sellers also forget that break-even is a moving target: a price change, a new ad budget, or a supplier increase all shift it. Finally, do not confuse revenue with profit — hitting your break-even revenue means you have covered costs, not that you have made money.
Frequently Asked Questions
What is a break-even point in business?
It is the sales volume at which total revenue equals total costs, so you make neither a profit nor a loss. Every unit sold beyond it generates profit.
How do I calculate break-even for an e-commerce product?
Divide your monthly fixed costs by your contribution margin (selling price minus all variable costs, including shipping, packaging, payment processing, and platform fees). The result is the number of units you must sell to break even.
What is contribution margin and why does it matter?
Contribution margin is selling price minus variable cost per unit — the money left to cover fixed costs and profit. A higher margin means you break even on fewer units and are more resilient to slow periods.
What is a good break-even point for a small business?
There is no universal number, but a healthy business reaches break-even well within its realistic monthly sales capacity, ideally using less than half of it, leaving room for profit. A contribution margin above 30% generally indicates a comfortable position.
How do I lower my break-even point?
Raise your selling price, reduce variable costs (supplier pricing, shipping, packaging), or cut fixed costs. Improving either contribution margin or fixed costs lowers the number of units you must sell to break even.
Related Calculators
- E-Commerce Profit Margin Calculator — Net profit, ROAS, and margin analysis.
- Shopify Profit Calculator — Profit after fees, COGS, and marketing.
- Amazon Seller Fee Calculator — Referral fees, closing fees, and net profit.