Break-even point: how many customers do you actually need?

Before investing in marketing, before hiring, before any growth decision — there's one question few business owners can answer: how many customers do you need per month to cover all your costs?

That number has a name: break-even point. It's the exact moment where revenue equals cost. Below it: loss. Above it: profit.

How to calculate:

The logic is straightforward. You need two numbers:

1. 1Total monthly fixed costs — everything you pay regardless of whether you have a client or not. Rent, salaries, your own salary, software, accountant, phone.

1. 1Contribution margin per customer — how much is left from each sale after removing variable costs (materials, commission, taxes on revenue, card processing fees).

Break-even point = Fixed costs / Contribution margin per customer.

Example:

Fixed costs: $15,000/month. Each customer pays $2,000, but $800 goes to variable costs. Contribution margin: $1,200.

Break-even point: 15,000 / 1,200 = 12.5 customers. Rounded up: 13 customers per month to avoid operating in the red.

Why this matters:

Because it changes the entire conversation about your business.

If you need 13 customers and are closing 8, you know exactly the size of the gap. It's not "I think things are slow" — it's "I need 5 more $2,000 customers to break even."

If you're closing 20, you know that 7 are generating real profit. You can calculate how much to invest to bring in more.

If the break-even point produces an impossible number — say, 50 customers per month in a market that doesn't have 50 — the problem isn't sales. It's the model. Either your fixed costs are too high, your margin per customer is too low, or both.

In practice, the break-even point answers three questions:

1. 1Am I making a profit or a loss? (How many customers do I have vs. how many do I need)
2. 2Can I invest in growth? (Only above the break-even point)
3. 3Is my model viable? (If the number is absurd, rethink it)

After 17 years in business, I can say this: the business owner who knows their break-even point makes different decisions. They hire with more confidence. They invest with more judgment. And they don't panic when a month is slow — because they know exactly what needs to happen.

Those who know their break-even point make different decisions. They hire with more confidence. They invest with more judgment.

What's yours? The Calculadora de Preços calculates it with your real numbers. No sign-up required.