How to Calculate Your Breakeven Point (And Why Most Founders Get It Wrong)

Anyone that’s launched a product has heard the questions before: How many units do you need to sell to break even? What margins do you actually need? How much can you spend on ads before you’re losing money on every sale?

These questions may sound like a Shark Tank panel grilling a founder on national TV. But they’re also the questions every product business needs to answer before scaling, whether you’re pre-launch or doing $10M in revenue. We’ve advised brands that have made it to that stage (and even had success on Shark Tank!), and the ones that scale profitably all have one thing in common: they know their numbers inside and out.

Here’s how to get there.

Start with what you’re selling

Before anything else, you need three numbers for each product in your lineup:

Price per unit. What you’re charging the customer. Straightforward, but worth pressure-testing. If you’re running multiple SKUs, you’ll want to map each one individually because margins can vary dramatically across your product mix.

Product mix. What percentage of your total sales does each product represent? If you sell one product, this is 100%. If you sell three, you need to estimate the split. This matters because your blended breakeven depends on the margin profile of your entire catalog, not just your hero SKU.

Cost to produce. The total cost to manufacture one unit and get it into your warehouse. That includes raw materials, manufacturing labor, packaging, and inbound freight. It does not include the cost to ship it to the customer.

These three inputs give you your gross profit per unit: the difference between what you charge and what it costs to make. If you’re selling a product for $50 and it costs $15 to produce, your gross profit is $35 and your gross margin is 70%. That’s your starting point.

Layer in the costs that eat your margin

Gross profit is what you earn on paper. Contribution margin is what you actually take home per sale. The difference comes down to two things:

Fulfillment costs. Everything it takes to get the product from your warehouse to the customer’s door: outbound shipping, pick-and-pack fees, delivery platform charges. These vary by product size and shipping method, so estimate per unit.

Marketing costs (driven by your target ROAS). This is where most founders either overspend or underestimate. Your Return on Ad Spend (ROAS) tells you how much revenue you generate for every dollar spent on advertising. 

A 2x ROAS means every $1 in ads produces $2 in sales, which means your marketing cost per sale is half your price.

We recommend targeting at least a 2x ROAS to leave enough margin after product and fulfillment costs. Best-in-class brands can push 4-5x, but that takes lots of time and testing.

Once you subtract fulfillment and marketing costs from your gross profit, you arrive at your contribution margin: what each sale actually contributes toward covering your fixed overhead. This is the number that determines whether your unit economics work.

Figure out your fixed costs

Variable costs scale with every unit you sell. Fixed costs are the baseline you’re paying regardless of volume: salaries and contractor costs, rent, professional services like legal and accounting, software subscriptions, travel, and everything else that hits your P&L every month whether you sell one unit or ten thousand.

Total these up on a monthly basis.

The breakeven formula

Once you have your contribution margin per unit and your total monthly fixed expenses, the math is simple:

Breakeven Units = Total Monthly Fixed Expenses / Weighted Contribution Margin per Unit

The “weighted” part matters if you sell multiple products. A $50 product with a $6 contribution margin vs a $75 product with an $8.50 contribution margin will produce different breakeven thresholds depending on your product mix.

That’s exactly what our calculator handles for you. Plug in your prices, costs, ROAS target, and fixed expenses, and it calculates your blended breakeven in seconds.

What your breakeven number actually tells you

Knowing your breakeven number  isn’t just a box to check for investors (though they will ask). It’s how you pressure-test the decisions that come next:

• Pricing. If your contribution margins are razor-thin, you’ll feel it the moment ad costs spike or fulfillment rates go up. Your breakeven number tells you how much room you have.
• Ad spend. Your target ROAS directly determines your marketing cost per sale, which flows straight into whether each unit is profitable. A small change here moves your breakeven number fast.
• Hiring and overhead. Every dollar added to your fixed costs raises your breakeven threshold. That new hire or warehouse lease isn’t just a monthly expense; it’s additional units you need to move.

Grab the calculator, plug in your numbers, and see where you stand. Five minutes now can save you a lot of expensive guessing later.

Need help building out your financial model? Pilot’s CFO Services team works with product businesses at every stage to get the numbers right. You can book a call with our team here.