Break Even Analysis for New Businesses
Why Break-Even Is the First Number You Should Calculate
Break-even analysis answers the most fundamental question in business: can this work? If your break-even point requires 500 sales per day and your market research suggests the entire market only sees 1,000 sales per day across all competitors, you need to rethink your cost structure, pricing, or market before investing another dollar. If your break-even requires 10 sales per day and your competitors are doing hundreds, the math works and you can proceed with confidence.
Break-even also reveals the relationship between your pricing and your costs in a way that no other analysis does. Small changes in either one create large swings in your break-even point. Raising your price by $5 might reduce your break-even from 300 units to 220 units. Reducing your cost of goods by $2 might drop it further to 190 units. These are the levers you pull to build a profitable business, and break-even analysis makes the impact of each lever visible.
Step-by-Step Calculation
Fixed costs are expenses that stay the same regardless of whether you sell zero units or a thousand. For a typical ecommerce business, monthly fixed costs include: ecommerce platform subscription ($29 to $299 for Shopify), software subscriptions such as email marketing, accounting, and inventory tools ($50 to $300 total), business insurance ($30 to $100), internet and phone ($100 to $200), storage space or rent ($0 for home-based, $200 to $2,000+ for a warehouse), loan payments if applicable, and your own salary or owner's draw if you plan to pay yourself from the start. Add every fixed cost and sum them for a monthly total. If your total monthly fixed costs are $3,000, that is $3,000 you must cover before a single dollar of profit exists.
Variable costs increase with each sale. For a physical product business, variable costs per unit typically include: product cost (what you pay your supplier), outbound shipping cost per package, packaging materials per order, payment processing fees (2.9% + $0.30 per transaction for Stripe/PayPal), marketplace fees if selling on Amazon or Etsy (8% to 15% referral fees), pick-and-pack fees if using a fulfillment center ($2 to $5 per order), and advertising cost per acquisition if you attribute ad spend directly to sales. Example: product costs $10, shipping costs $4, packaging costs $1, payment processing costs $1.30 on a $35 sale, and advertising costs $6 per customer. Total variable cost per unit: $22.30.
Your selling price comes from your pricing strategy, informed by competitor pricing, your target margin, and what your target customers are willing to pay. For this calculation, use your average selling price if you offer multiple products at different price points. If you sell products ranging from $20 to $80, and your sales data or estimates suggest the average order is $42, use $42 as your selling price. If you offer free shipping, your selling price is what the customer pays, and your shipping cost stays in the variable cost column.
Contribution margin is the amount each sale contributes toward covering your fixed costs. Formula: selling price minus variable cost per unit. Using the example numbers: $42 selling price minus $22.30 variable cost equals $19.70 contribution margin. This means every sale generates $19.70 that goes toward covering your $3,000 in monthly fixed costs. Once fixed costs are covered, every additional sale generates $19.70 in profit. You can also express this as a contribution margin ratio: $19.70 / $42 = 46.9%. This percentage is useful for projecting break-even in revenue terms rather than units.
Break-even in units = fixed costs / contribution margin per unit. Using our example: $3,000 / $19.70 = 152.3 units. Round up because you cannot sell a partial unit. You need to sell 153 units per month, or roughly 5 per day, to break even. This is your survival number. Below 153 units, you are losing money. Above 153 units, you are profitable. Compare this number to your realistic sales estimate from your market research. If 5 sales per day seems achievable given your marketing budget and target market, the business is viable. If 5 sales per day seems wildly optimistic for a brand-new store with no audience, you need to adjust.
Break-even revenue = break-even units multiplied by selling price. Using our example: 153 units multiplied by $42 = $6,426 in monthly revenue to break even. Alternatively, use the contribution margin ratio: $3,000 / 0.469 = $6,396 (the small difference is rounding). This number tells you the minimum monthly revenue your business needs to cover all costs. Below this, you are burning cash. Above this, you are generating profit. Compare this to your revenue projections in your financial plan. If your projected month-six revenue is $8,000, you expect to reach profitability around month five or six based on the growth trajectory.
What to Do With Your Break-Even Number
If your break-even point is too high, you have four levers to adjust it. First, raise your selling price. Every dollar increase reduces your break-even by several units. If raising from $42 to $47 does not significantly impact your conversion rate (test this through A/B testing), your break-even drops from 153 units to 122 units, a 20% improvement. Second, reduce your variable costs. Negotiating a lower product cost, finding cheaper shipping options, or reducing advertising cost per acquisition all lower your break-even. Third, reduce your fixed costs. Every $100 per month you eliminate lowers your break-even by approximately 5 units in our example. Fourth, increase your average order value through bundling, upselling, or minimum-order thresholds for free shipping, which spreads your fixed costs across more revenue per transaction.
Include your break-even analysis prominently in your business plan. It demonstrates to lenders and investors that you understand the financial mechanics of your business and have set a clear target for viability. Update the analysis whenever your costs, prices, or product mix change significantly, which typically means re-running it quarterly during your first year of operations.
Break-Even for Multi-Product Stores
If you sell multiple products at different prices and margins, calculate a weighted average contribution margin. If 60% of your sales are Product A ($42 price, $19.70 margin) and 40% are Product B ($28 price, $11.50 margin), your weighted contribution margin is (0.60 x $19.70) + (0.40 x $11.50) = $16.42. Divide your fixed costs by this weighted margin: $3,000 / $16.42 = 183 units per month. The mix matters. If your sales shift toward the lower-margin product, your break-even increases. This is why tracking product-level profitability and steering marketing toward higher-margin products is a critical part of cash flow management.