Break-even point for e-commerce: Formula, examples, and tips

The break-even point (BEP) is an important metric in determining the profitability of a business. Whether you are doing dropshipping, selling only one product, or planning to open an online store, analyzing the point of break-even will help you better map out your strategies to make a profit.

Key takeaways

• The break-even point (BEP) of an e-commerce store is the sales level where revenue equals total costs: no profit and no loss.
• In units, it is fixed costs divided by the contribution margin per unit. A store with $200 in fixed costs, a $50 price and $30 in variable costs breaks even at 10 units, or $500 in revenue.
• Break-even ROAS is 1 divided by the contribution margin ratio, with ad spend left out of the variable costs. A 40% margin gives a break-even ROAS of 2.5.
• A discount raises the break-even point: 10% off a product with a 40% margin needs 33% more units to earn the same contribution.
• Recalculate whenever a price, a supplier cost, a fee or the product mix changes.

The break-even point is the amount of sales, in units or in revenue, that an e-commerce store needs to reach to cover all its costs. At this point, you neither lose nor make a profit, which often refers to the short run. That said, it acts as an important metric to gauge how well your online store is performing. For an e-commerce business, the break-even calculation can decide whether a growth plan holds up.

If you do dropshipping or have a one-product store, knowing your break-even point is key to pricing your products correctly. Whatever pricing strategy you choose, make sure it covers all operating expenses, leaves a safety margin for unexpected costs, and still allows you to turn a profit. Understanding this threshold helps you set realistic pricing goals and avoid underpricing your products.

According to Rob Stephens (CPA), the founder of CFO Perspective, quoted by Lightspeed, break-even analysis provides a reality check for any investment you make in your business. This way, you can better understand the financial impact of your decisions and whether an investment is truly worth it. For example, if you're testing a new supplier, break-even analysis shows you exactly how many sales you need to cover those costs.

Break-even analysis also gives you a clearer picture of your cost structure. Stephens told Lightspeed that it simplifies the question "by figuring out the least sales needed to cover your expenses": it's much easier to answer whether you can exceed the sales needed to break even than it is to guess your future sales. Plus, working through the numbers helps you catch any expenses that might be forgotten and avoid unpleasant surprises later.

To determine the exact break-even point of your e-commerce business, you need to understand different components of the equation.

Every break-even formula uses the same four components: the selling price, fixed costs, variable costs, and the contribution margin left after variable costs. On a Shopify store, most of the work is sorting each cost into the right one of the four:

• Selling price: Also known as revenue per unit, the selling price is how much you estimate the value of your product and service. This is the most important component, as it decides whether you can cover your costs and make a profit. For instance, if you decide to raise your price, assuming the other things don't change, your break-even point will be lower. Conversely, if you lower your price, you'll need more sales to break even.
• Fixed costs: These costs are business expenses that don't change in total amount. They are often referred to as overhead costs or indirect costs because you still need to pay these costs, even if you don't sell anything. For a Shopify store, think about the Shopify plan, the theme, app subscriptions, and any salaries or software you pay for whether or not an order comes in.
• Variable costs: Unlike fixed costs, variable costs are expenses that change in direct proportion to the level of sales volume of a business. For a Shopify store, these are the product cost, packaging, shipping and fulfillment, payment processing fees, and the discount you give on each order. Ad spend also rises with sales, but keep it on its own line: the ROAS formula below needs it separate.
• Contribution margin: This is the difference between the sale price and variable costs of a product. Contribution margin represents the amount that will cover your fixed costs and ultimately generate a profit. With this number, you can also see which products or marketing channels give you the best return for every dollar spent.

💡To better understand contribution margin, let's look at this example. If your online store sells two items:

• Product A: $50 selling price, $30 variable costs, so Contribution margin = $20
• Product B: $40 selling price, $32 variable costs, so Contribution margin = $8

Even though both products sell well, Product A contributes more profit toward your fixed costs with each sale.

The break-even point of an e-commerce store can be stated four ways: in units, in revenue, as a return on ad spend (ROAS), and as a cost per acquisition (CPA). All four use the same example below: a $50 price, $30 in variable costs per unit before ads, and $200 in fixed costs a month.

The breakeven point formula for determining how many product units must be sold is:

Break-even point (Units) = Total fixed costs / Contribution margin*

*Contribution margin = sales price per unit - variable costs per unit

Let's say your e-commerce storefront sells cosmetic items at $50 each. After calculating, you determine your variable costs per unit to be $30, and your total fixed costs are $200. Here's the break-even point you need to sell to cover both fixed and variable costs: $200/($50 - $30) = 10 items.

Any sales amount that goes beyond this point will contribute directly to profits. If you sell 9 items or fewer, you will suffer a loss.

This next formula shows your break-even point in dollar terms. Instead of units, it tells you the total revenue you need to generate to break even. The formula is:

Break-even point (Sales dollars) = Total fixed costs / (contribution margin per unit/sale price per unit)

Using the same example above. After calculating your contribution margin per unit to be: $50 - $30 = $20, your break-even point formula in dollar amount will be: $200/($20/$50) = $500.

This means that if your sales are above $500 in the month, it begins to show a profit. Below $500, and you are losing money.

If you're running ads for your e-commerce store, you can use the break-even formula to figure out your target ROAS (return on ad spend). In simple terms, this formula tells you the minimum return you need from your ads to cover costs and stay in the black.

Here's how to calculate your break-even point formula by ROAS:

Break-even ROAS = Selling price per unit / (Selling price per unit - Variable costs per unit*)

*Leave advertising costs out of the variable costs here. ROAS is revenue divided by ad spend, so ad spend is the number the formula solves for, whether the ads run on Meta, Google or TikTok.

The same formula has a shorter form: Break-even ROAS = 1 / Contribution margin ratio. The contribution margin ratio is the share of the selling price left after every variable cost except ads: product cost, shipping, packaging, payment processing fees and discounts.

From the previous example, if you sell your cosmetic items for $50 each, with the variable costs per unit being $30, your contribution margin is $20, or 40% of the price. Your break-even ROAS will be: $50 / ($50 - $30) = 2.5, the same as 1 / 0.40.

For every $1 you spend on ads, you must earn at least $2.5 in revenue to avoid losing money. Pay attention that this revenue is before the deduction of fixed costs.

Use the contribution margin here, not the gross margin. Gross margin only subtracts the product cost. Say the product costs $22, and shipping, packaging and the fees from Shopify Payments or PayPal add the other $8. The gross margin is 56%, and 1 / 0.56 gives a break-even ROAS of 1.79. At that ROAS you spend $28 on ads per order and keep only $20, so every order loses $8.

Cost per acquisition (CPA) is what you pay in ads to get one order. Break-even CPA is the most you can pay before that order loses money, and it equals the contribution margin per unit before ads.

Break-even CPA = Selling price per unit - Variable costs per unit (before ads)

In the same example: $50 - $30 = $20. Pay less than $20 in ads for an order and it contributes to your fixed costs. Pay more and the order loses money before fixed costs are even counted.

Break-even CPA and break-even ROAS say the same thing in two units: $50 / $20 = 2.5. Use CPA when you read cost per purchase in Meta Ads Manager or Google Ads, and ROAS when you read return. If customers usually buy more than one unit, run both formulas per order, with average order value (AOV) in place of the price.

If you sell more than one product, our break-even analysis becomes more complex. Different products have different costs and margins, making a single-product equation too simple to capture your true financial picture. Instead, you will need to use a weighted average across your entire product mix.

For example, you open another store that sells stationery, with a bundle of three products:

• Notebooks that take up 60% of total unit sales
• Pencils that take up 30% of total unit sales
• Erasers that take up 10% of total unit sales

However, these products have different prices and variable costs per unit:

• Notebooks have a price of $120 with $70 variable costs
• Pencils have a price of $30 with $15 variable costs
• Erasers have a price of $10 with $5 variable costs

In this scenario, the weighted average price per unit would be: (0.6*$120) + (0.3*$30) + (0.1*$10) = $82

At the same time, the weighted average variable costs per unit would be: (0.6*$70) + (0.3*$15) + (0.1*$5) = $47

From this information, we can calculate the total break-even units based on the formula:

Break-even point (units) = Fixed costs / Weighted average contribution margin per unit*

*Weighted average contribution margin per unit = Weighted average price per unit – Weighted average variable cost per unit

If our fixed costs are $500, the break-even units will be: 500/(82-47) = 14.29, which is around 15 units.

Then, you multiply the total break-even units by each product's sales mix to calculate how many of each you'd need to sell:

• Notebooks: 15*60% = 9 units
• Pencils: 15*30% = 4.5, round up to 5 units or down to 4 units
• Erasers: 15*10% = 1.5, round down to 1 unit or up to 2 units.

To calculate break-even in dollar terms instead of units, the approach is the same, but you'll use a different formula:

Break-even point (dollar amounts) = Fixed costs / (Weighted contribution margin per unit / weighted average price per unit)

A discount lowers the selling price while the variable costs stay the same, so the contribution margin shrinks and the break-even point rises. Before you run 10% off on your Shopify store for Black Friday or Cyber Monday, work out how many extra units the discount has to sell to pay for itself.

Extra units needed (%) = Discount % / (Contribution margin ratio - Discount %)

Take the cosmetics example again: a $50 price, $30 in variable costs, a 40% contribution margin. At 10% off, the price is $45 and the contribution margin falls from $20 to $15 per unit. To earn the same contribution you need 10% / (40% - 10%) = 33% more units, and the monthly break-even point moves from 10 units to 14 ($200 / $15 = 13.3, rounded up).

A deeper discount needs far more volume. At 20% off the margin halves to $10 and break-even doubles to 20 units, which is 100% more. At 30% off the margin is $5, break-even is 40 units, and you need 300% more units to earn what you earned at full price.

This is why a discount works better when it is tied to quantity. A volume discount gives the lower price only to orders that already contain more units, so the extra volume the math asks for is built into the offer. With Qikify Volume Discounts, you set quantity breaks on a Shopify product, for example a small discount at 2 units and a larger one at 3. Check each tier against the formula above before you publish it.

Although break-even analysis provides you with valuable insights into your costs, pricing, and profit potential, it still has its limitations:

• Marginal costs: The formulas assume your per-unit costs stay the same, but that's rarely true in real life. Supplier prices change, volume pricing kicks in at certain thresholds, and seasonal factors can affect costs unexpectedly.
• Product variety: Break-even analysis becomes more complex when you offer multiple SKUs with different prices and variable costs. While you can still use the weighted average formula, managing it manually gets overwhelming quickly. And here's the catch: your calculations assume a stable sales mix. If customers suddenly favor one product over another, your entire break-even point shifts, and you're back to square one.
• Price cannibalization: This phenomenon happens when one product decreases sales of another product. For instance, if you heavily discount pencils, customers might buy only cheap pencils instead of your higher-margin notebooks. Break-even analysis typically assumes that product sales are independent, so it doesn't account for these cross-product effects or shifts in customer demand caused by pricing changes.

Related: What is wholesale price? Best strategies to price for profit

When it comes to planning for the break-even point, many e-commerce merchants have made critical errors in their calculations that lead to mispriced products and vanishing profit margins.

Here are five common break-even calculation errors that make sure you get it right:

• Forgetting hidden costs: Most people forget to include their hidden costs. Think about payment processing fees, currency conversion fees, and chargeback fees.
• Using imaginary ad costs: If you just start running ads, don't just estimate your CPA or ROAS numbers. In reality, your actual costs will likely be much higher, especially during those first few weeks while algorithms learn. Instead, observe and monitor your actual early performance, and adjust your break-even numbers as your campaigns mature.
• Not updating calculations: Most of your variables, even fixed prices, will change. If you don't update your break-even point after these changes, you will make decisions with outdated numbers. That's why you should consider using a spreadsheet or tool that automatically updates your break-even point when things change. It saves time and keeps your numbers accurate.
• Ignoring cross-product dynamics: When you sell multiple products, each has different costs and profit margins. The mistake? Assuming they operate independently. In reality, the pricing of one product can impact the sales of another. For instance, a discount on Product A might draw customers away from higher-margin Product B, disrupting your entire break-even calculation.
• Not separating break-even by traffic source: If you use multiple channels to run ad campaigns, make sure to track break-even CPA or ROAS separately for each channel. Label the link properly using UTM tags and track each channel's performance in a dashboard so you can monitor break-even metrics at a glance.

There are four ways to lower the break-even point of an e-commerce store, and each one changes a single term of the formula: raise the price, cut the variable cost per unit, cut the fixed costs, or sell more units per order. Run each idea through the units formula before you commit to it. In the cosmetics example, moving the price from $50 to $55 lifts the contribution margin to $25, and the break-even point drops from 10 units to 8.

• Raise the price: A higher price widens the contribution margin on every unit, as the $55 example shows. Test it on one product before you change the catalog.
• Cut the variable cost per unit: Negotiate the product cost, lighten the packaging, or move to a cheaper shipping rate. Every dollar saved per unit goes straight into the contribution margin.
• Cut the fixed costs: Review the apps and tools you pay for every month. Stephens calls this "the most effective way to reduce the sales you need to break even".
• Sell more units per order: Shipping and payment fees have a fixed part per order, so the second unit in an order costs less to deliver than the first. Raising your average order value spreads those costs over more units.

Repeat orders help too. A customer who comes back without clicking an ad has no acquisition cost, so the whole contribution margin of that order goes to your fixed costs. One of the strategies you can use for your Shopify store is to use store credit as a reward for repeat purchases.

Whether you are a dropshipper, an e-commerce store owner, or just simply have a store as a side hustle, knowing the break-even point should always be at the top of mind. It acts as a compass that shows how close you are to profitability and where to focus your optimization efforts

Start by gathering all the numbers you need. Then, calculate your break-even point using the formulas we've covered. Remember, include all costs (especially the hidden ones), use realistic projections, and update your calculations as your business evolves. From there, work on the four levers: price, variable costs, fixed costs and order size.

The path to profitability starts with knowing your numbers, and now you have the formulas to find them.

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1. What is the break-even point?

In e-commerce, the BEP is the number of orders you need to fulfill, or the sales revenue you need to generate to cover all your costs.

2. How do I calculate my break-even point?

To calculate the break-even point, divide Fixed Costs by the Contribution Margin (Selling Price minus Variable Cost per unit).

3. What is a good break-even ROAS?

There is no universal number for e-commerce: break-even ROAS is 1 divided by your contribution margin ratio. A 40% margin breaks even at 2.5, a 25% margin at 4.0, and a 60% margin at 1.67. Anything above your own number contributes to fixed costs and profit.

4. Is break-even ROAS 1 / gross margin or 1 / contribution margin?

Use the contribution margin. Gross margin leaves out shipping, packaging, payment processing fees and discounts, so it gives a break-even ROAS that is too low.

5. How much more do I need to sell if I offer 10% off?

Divide the discount by the contribution margin ratio minus the discount. With a 40% margin, 10% off needs 10% / 30% = 33% more units to earn the same contribution.

6. How often should I recalculate my break-even point (BEP)?

Whenever a price, a supplier cost, a shipping rate, a fee or a fixed cost changes, and at least once a quarter. On an e-commerce store with several products, recalculate when the sales mix shifts too.

7. How is a BEP used?

The Break-Even Point (BEP) is a critical financial metric used primarily for strategic decision-making, setting targets, and risk assessment within a business.