Every small business owner eventually asks the same question: how many sales do I need before I stop losing money? Knowing how to calculate break-even point gives you that answer in minutes. It tells you the exact number of units, or the exact dollar amount of sales, you need each month to cover all your costs. Below the line you lose money. Above it, every sale adds profit. This guide walks you through the formulas, a full worked example and the practical ways US small businesses use the number to set prices, plan hiring and judge new ideas.
If you have not yet set your prices, read our guide on how to price a product first, because price is one of the three inputs in the break-even formula.
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What Is the Break-Even Point?
The break-even point is the level of sales where total revenue equals total costs. At that point your profit is exactly zero. It is not a goal on its own. It is a floor. Once you know where the floor sits, you can see how far above it you are operating and how much room you have if sales drop.
To work it out, you need to split your costs into two groups and know your selling price.
Fixed costs
Fixed costs stay the same whether you sell one item or one thousand. Common examples include:
- Rent and utilities for your shop, office or warehouse
- Salaried staff wages
- Business insurance
- Software subscriptions and accounting fees
- Loan interest, depreciation and property taxes
Variable costs
Variable costs rise and fall with each sale. Think raw materials, packaging, shipping, sales commissions and card payment processing fees. You measure them per unit.
Contribution margin
Contribution margin is your selling price minus the variable cost of one unit. It is the slice of every sale left over to pay your fixed costs. Once fixed costs are covered, the contribution margin becomes profit.
How to Calculate Break-Even Point: The Two Formulas
There are two versions of the formula. Product businesses usually use the first. Service businesses, which do not sell neat “units”, usually use the second.
1. Break-even point in units
Break-even units = Fixed costs ÷ (Selling price per unit − Variable cost per unit)
The bottom half of that formula is simply your contribution margin per unit. QuickBooks’ break-even guide uses a clean example: a company with $15,000 in monthly fixed costs sells widgets at $25 that cost $5 each to make. $15,000 ÷ $20 = 750 units. The 751st widget is the first one that earns a profit. If the price rises to $30, the break-even drops to 600 units.
2. Break-even point in sales dollars
Break-even sales = Fixed costs ÷ Contribution margin ratio
The contribution margin ratio is the contribution margin divided by the selling price. If you keep 60 cents of every dollar after variable costs, your ratio is 0.60. This version answers a slightly different question: how much revenue do I need, regardless of which products make it up?
A Worked Example: A Coffee Cart in Five Steps
Let’s run the numbers for a hypothetical mobile coffee cart. The figures are illustrative, so swap in your own.
- Add up monthly fixed costs. Pitch fee, insurance, card reader subscription, van lease and the owner’s set draw come to $4,200.
- Find the average selling price. The average drink sells for $5.50.
- Work out variable cost per drink. Beans, milk, cup, lid and card fee total $1.80.
- Calculate contribution margin. $5.50 − $1.80 = $3.70 per drink.
- Divide. $4,200 ÷ $3.70 = 1,135.1, so the cart must sell 1,136 drinks a month to break even.
Spread across 26 trading days, that is about 44 drinks a day. The contribution margin ratio is $3.70 ÷ $5.50, or roughly 67%, which puts break-even sales at about $6,243 a month. Now the owner has a daily target that every team member can understand.
What-If Scenarios: How Small Changes Move the Line
The real power of break-even analysis is testing decisions before you make them. Here is how the coffee cart’s monthly target shifts:
| Scenario | Contribution margin | Fixed costs | Drinks to break even |
|---|---|---|---|
| Baseline | $3.70 | $4,200 | 1,136 |
| Raise price to $6.00 | $4.20 | $4,200 | 1,000 |
| Cut variable cost to $1.50 | $4.00 | $4,200 | 1,050 |
| Cut fixed costs to $3,600 | $3.70 | $3,600 | 973 |
| Target $2,000 profit | $3.70 | $6,200 | 1,676 |
Notice the last row. To plan for a profit target, just add the profit you want to your fixed costs and run the same formula. This turns break-even analysis into a simple sales goal calculator.
Five Ways to Lower Your Break-Even Point
- Raise prices carefully. Even a small increase lifts the contribution margin on every unit. Test it on one product line first.
- Negotiate supplier costs. Bulk buying, cheaper packaging or a different shipping carrier all trim variable costs.
- Review subscriptions and overheads. Cancel tools you no longer use and renegotiate insurance or rent at renewal.
- Push higher-margin products. Shifting your sales mix toward items with bigger margins lowers the overall target.
- Get paid faster. Break-even is about profit, not cash, but slow-paying customers can sink you even above the line. Tighten your process with our small business billing guide.
Limits of Break-Even Analysis
The formula is simple, which is both its strength and its weakness. Keep these limits in mind:
- It usually ignores taxes, loan principal repayments and, unless you include it, the owner’s pay.
- It is only as accurate as your cost records. If variable costs are hard to pin down, calculate a low, middle and high estimate.
- It assumes one price and one cost per unit. A business with many products needs an average or a weighted sales mix.
- It is a forecast, not a report. Your profit and loss statement tells you what actually happened.
Recalculate whenever prices, supplier costs or rent change. A break-even figure from last year can quietly mislead you.
How to Use Your Break-Even Number
Once you have the figure, put it to work:
- Set daily or weekly targets your team can track on a whiteboard.
- Judge new hires. Add the new salary to fixed costs and see how many extra sales the role must support.
- Test a new location or product before you sign a lease or order stock.
- Talk to lenders. Banks and investors want to see that you understand your numbers. Pair it with a plan to build business credit before you apply for financing.
FAQ
What is a good break-even point?
There is no universal number. A healthy business sits comfortably above its break-even point most months, so a slow week does not push it into a loss.
How do service businesses calculate break-even?
Use the sales-dollar formula: fixed costs divided by contribution margin ratio. You can also use billable hours as your “unit” if you charge by the hour.
Should I include my own salary?
Yes, if you want a realistic picture. Leaving it out makes the business look profitable when it is not really paying you.
How often should I recalculate?
Review it at least quarterly and any time a major cost or price changes.
Conclusion
Learning how to calculate break-even point takes ten minutes and a spreadsheet, yet it changes how you run a business. List your fixed costs, measure variable cost per unit, find your contribution margin and divide. Then use the result to set targets, test prices and plan growth with confidence. Run the numbers this week, and run them again every time your costs move.
