Break-Even Point Formula: How to Calculate It

The formula in plain terms

Break-even units equal fixed costs divided by price per unit minus variable cost per unit. Break-even dollars equal fixed costs divided by the contribution margin ratio.

Two numbers drive the calculation. Fixed costs stay the same no matter how much you sell in a month: rent, salaried payroll, insurance, software, loan payments. Variable costs rise with each sale: materials, packaging, card processing fees, hourly labor tied to jobs.

The gap between what you charge and the variable cost is your contribution margin. It is what each sale contributes toward paying fixed costs.

• Break-even in units = fixed costs / (price - variable cost per unit)
• Contribution margin ratio = (price - variable cost) / price
• Break-even in dollars = fixed costs / contribution margin ratio

Worked example for a product business

If fixed costs are $12,000 a month and each unit sells for $50 with $30 in variable cost, break-even is 600 units, or $30,000 in sales.

This is an illustrative example with round numbers. A small shop sells a product for $50. Materials, packaging and payment fees come to $30 per unit. Monthly fixed costs are $12,000.

1. Contribution margin per unit: $50 - $30 = $20.
2. Break-even units: $12,000 / $20 = 600 units.
3. Contribution margin ratio: $20 / $50 = 40 percent.
4. Break-even dollars: $12,000 / 0.40 = $30,000.

At 600 units the business earns exactly zero profit. At 800 units, the extra 200 units add $4,000 of profit. At 500 units, it loses $2,000. This is a simple way to see how thin margins make volume risky.

Worked example for a service business

Services work the same way, but the unit is usually a billable hour or a job. Use average revenue and average variable cost per job.

Say a home-service company averages $400 per job. Parts, fuel and technician pay for the average job come to $260. Monthly fixed costs for office, insurance, vehicles and admin staff are $14,000.

Contribution per job is $140. Break-even is $14,000 / $140 = 100 jobs a month, or $40,000 in revenue. This is an example only; use your own averages.

If your team can complete only 90 jobs a month with current staffing, you are below break-even by design. You then have three levers: raise price, cut variable cost per job, or lower fixed costs. Our small business pricing guide covers the first one.

Adding a profit target

To find the sales needed for a target profit, add the profit goal to fixed costs before dividing by contribution margin.

Break-even tells you the floor. Most owners want to know the sales needed to take home a certain amount. The adjustment is simple:

Required units = (fixed costs + target profit) / contribution margin per unit.

Using the product example, if you want $6,000 of monthly profit: ($12,000 + $6,000) / $20 = 900 units, or $45,000 in sales.

Remember that profit before taxes is not the same as cash in your account. Debt principal payments and owner draws affect cash but not profit. For the difference, read cash flow vs. profit.

Sorting costs: what is fixed and what is variable

Many costs are mixed. Treat a cost as variable if it moves with sales volume in the short run, and fixed if it stays put regardless.

Real books are messier than the formula. Utilities have a base charge and a usage charge. A manager's salary is fixed, but overtime is variable. Credit card fees are a percentage of sales, so they are variable.

Use your last six to twelve months of statements. Put each expense into one of three buckets: fixed, variable, or mixed. Split mixed items into their fixed and variable parts as best you can.

Avoid the common mistake of leaving out owner pay, taxes or loan payments. They are real obligations. If you cannot pay yourself at the break-even level, it is not a sustainable number.

Using break-even to make decisions

Re-run the break-even calculation before changing price, hiring, adding a location or taking on debt, to see how each change moves your required sales.

The formula becomes more useful when you change one input at a time:

• Raise price by 5 percent: contribution margin rises, break-even units fall.
• Hire a salaried employee: fixed costs rise, so break-even rises.
• Switch suppliers: variable cost changes the margin.
• Add a new payment: loan or lease payments increase fixed costs.

Keep a monthly check against your actual sales. If you hover near break-even, small revenue dips can create losses. A margin of safety, the gap between actual sales and break-even sales, is worth tracking. You can also build one into your cash flow forecast.

When funding changes the break-even point

Financing adds a fixed payment, so your break-even rises. Borrow only when the new revenue or savings it creates outweigh that extra cost.

Suppose a $50,000 equipment purchase adds a $1,500 monthly payment. In this illustrative case your fixed costs rise by $1,500, and at a $20 contribution margin you need 75 more units a month just to cover it. If the equipment produces more than that in added sales or cost savings, the purchase makes sense. If it does not, it deepens your break-even hole.

That is how ROI Funder looks at it: start from what the money will produce, then check true cost and payback. See how to calculate small business loan ROI.

Established businesses with 6+ months in operation and $20,000+ monthly revenue can apply in a few minutes with a soft credit pull. Options include equipment financing and term loans.