When Does a Business Start Making Money?

Making sales is not the same as making a profit

A business can make sales without making a profit. Imagine that your business sells a product for $20. If you sell 100 units, your total sales revenue is: $20 x 100 = $2,000.

That $2,000 is the money generated from sales. However, from that money, you may still have to pay for the products, packaging, transportation, staff, rent, software, marketing, and other expenses. If all of those costs total $2,200, the business has generated $2,000 in revenue but has made a $200 loss. This is why revenue alone does not tell you whether a business is profitable. You also need to consider what it costs to generate that revenue.

What break-even actually means

Break-even is the point where the money generated from sales is enough to cover the costs of running the business. At break-even, the business is not making a profit and not making a loss based on the costs included in the calculation. Every dollar earned is being used to cover the costs of producing and selling the products or services. Once sales go beyond the break-even point, the business can begin generating a profit, assuming the selling price and costs remain reasonably consistent.

To understand how this works, we need to look at three things: fixed costs, variable costs, and contribution per unit.

Fixed costs

Fixed costs are expenses that generally stay the same regardless of how many units you sell. Rent, insurance, software subscriptions, and some salaries are examples. Even if you have a slow month and sell very little, these costs may still have to be paid. For example, if your monthly rent is $1,000, you still have to pay that $1,000 whether you sell 10 units or 100 units.

Variable costs

Variable costs change as your sales volume changes. They are directly related to producing or delivering each additional unit. For a food business, this might include ingredients and packaging. For an online business, it could include payment processing fees. Other businesses may have costs such as shipping or direct labor that increase as more orders are completed. If one product costs $8 to produce and you sell 100 units, the variable cost associated with those units would be $800.

Contribution per unit

Contribution per unit is the amount from each sale that remains after paying the variable cost of that sale. It is the amount available to help cover the business's fixed costs.

For example, if you sell a product for $20 and its variable cost is $8:
$20 − $8 = $12

The remaining $12 is the contribution per unit. That $12 first goes toward covering your fixed costs. Once all fixed costs have been covered, additional contribution can become profit. This is why contribution per unit is important when calculating break-even. It tells you how much each sale contributes toward reaching the point where the business has covered its costs.

Seeing break-even on a graph

The relationship becomes easier to understand when you look at it visually.

The revenue line starts at zero because you have no sales when you have sold zero units. As you sell more units, revenue increases.

The total cost line starts above zero because the business already has fixed costs before making any sales. It then rises as variable costs are added with each additional unit sold.

The point where the two lines meet is the break-even point.

Before that point, total costs are greater than revenue, so the business is operating at a loss. After that point, revenue is greater than total costs, so the business can begin generating a profit. The exact break-even point depends on your selling price, variable cost per unit, and fixed costs. Change any of these, and the number of units you need to sell to break even will change as well.

How to calculate it

The calculation is straightforward once you have reasonable estimates for your costs and selling price. You do not need perfect numbers to begin. Use the best information you have and improve the estimates as you learn more.

The basic steps are:

1. Add up your monthly fixed costs.
2. Estimate the variable cost of one unit.
3. Identify the selling price of one unit.
4. Subtract the variable cost from the selling price to find the contribution per unit.
5. Divide fixed costs by contribution per unit to find the break-even units.
6. Multiply the break-even units by the selling price to find break-even revenue.

The two main calculations are:
     Break-even units = Fixed costs ÷ Contribution per unit
     Break-even revenue = Break-even units × Selling price
This makes the relationship easier to see: the more each sale contributes toward fixed costs, the fewer sales you need to reach break-even.

What the result is telling you

The break-even number gives you a sales target for covering the costs included in your calculation. If you expect to sell comfortably above that level, your current price, costs, and sales assumptions leave room for a profit. If expected sales are below it, the business will not cover those costs under the current assumptions. That does not automatically mean you should abandon the idea. It tells you where to look.

Could the price be different? Could some costs be reduced? Could you sell more units? Could the business increase its capacity? Or are the sales assumptions themselves too optimistic?

Questions worth asking

A break-even calculation organises your assumptions. It does not replace judgement. Once you have a number, look at what is behind it.

• Which assumption has the biggest effect on the result? Is it your price, variable cost, fixed costs, or expected sales?
• Which numbers are you least certain about?
• What happens if your actual sales are 20% lower than expected?
• Have you included a realistic amount for your own time or pay?
• Have you separated one-time costs from ongoing monthly costs?

Keep learning as you go

Once you know your break-even point, sales figures become more meaningful. You can compare actual sales with the level the business needs to cover its costs. But the calculation is only as good as its assumptions. As you learn more, update your price, costs, and sales estimates. A change in any of them can change your break-even point.

You don't have to have everything figured out today. You just need a clearer next step.