Break-Even Point Calculator: How to Find the Sales You Need to Cover Your Costs

Your break-even point is the amount of sales at which revenue exactly equals total costs, so you make neither a profit nor a loss. In units, it equals fixed costs divided by the profit each unit contributes after variable costs. In dollars, it equals fixed costs divided by your contribution margin ratio. Knowing this number tells you whether a business idea, a price change or a new hire is realistic before you spend the money.

The core formulas

First, separate your costs into two groups.

• Fixed costs do not change with sales volume in the short run: rent, salaried pay, insurance, software subscriptions, loan payments.
• Variable costs rise and fall with each sale: materials, direct hourly labor, packaging, shipping, payment fees, sales commissions.

Then use:

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

Worked example: a small coffee cart

These numbers are illustrative.

• Average sale: $6.00
• Variable cost per sale (ingredients, cup, card fee): $2.10
• Fixed costs per month: rent for a cart spot $600, permits and insurance $250, loan payment $350, phone and software $50, a part-time helper's guaranteed pay $1,000. Total: $2,250

Contribution per sale = $6.00 - $2.10 = $3.90. Break-even units = $2,250 / $3.90 = 577 sales per month (576.9, round up). Contribution margin ratio = $3.90 / $6.00 = 65%. Break-even dollars = $2,250 / 0.65 = $3,462.

At roughly 26 operating days a month, that is about 22 sales per day just to cover costs, before the owner earns anything. If the owner wants a $2,000 monthly profit, add it to fixed costs: ($2,250 + $2,000) / $3.90 = 1,090 sales, or about 42 a day.

Break-even with a profit target

Most owners do not want to break even, they want to earn something. The same formula adapts:

Units for target profit = (fixed costs + target profit) / contribution per unit

Try a few targets. The table below uses the coffee cart numbers.

Each extra $1,000 of profit requires about 256 more sales, because every sale contributes only $3.90.

What happens when you change price or costs

Break-even is very sensitive to contribution per unit, which makes it a useful test for price changes.

• Raise the price from $6.00 to $6.50 with the same variable cost: contribution rises to $4.40, and break-even falls to $2,250 / $4.40 = 512 sales.
• Ingredient costs rise $0.30: contribution falls to $3.60, and break-even rises to 625 sales.
• Add a $400 monthly cost for a second helper: break-even rises to ($2,250 + $400) / $3.90 = 680 sales.

If a small price rise reduces demand only slightly, the extra contribution often outweighs the lost sales. The reverse is also true: a discount that looks harmless can raise your break-even sharply. Compare this with the discount math in the margin vs markup guide.

Multiple products: use a weighted average

If you sell several items, calculate an average contribution per sale weighted by your sales mix.

Suppose 60% of sales are drinks with $3.90 contribution and 40% are pastries with $2.50 contribution. Weighted contribution = 0.6 x $3.90 + 0.4 x $2.50 = $2.34 + $1.00 = $3.34. Break-even = $2,250 / $3.34 = 674 total sales. If the mix shifts toward lower-contribution items, your break-even rises even though your prices did not change.

Costs people often leave out

• Owner pay. If you need an income from the business, include it as a fixed cost or as a profit target.
• Taxes. Self-employment and income taxes are paid from profit, so your target should be higher than the take-home you want. See the self-employment tax guide.
• Loan principal. The principal portion of a loan payment is not an expense on your profit and loss statement, but it is cash you must have every month. Use the full payment for a cash break-even.
• Seasonality. A monthly average hides slow months. If three months are weak, calculate break-even for those months specifically.
• Semi-variable costs. Utilities, overtime and delivery costs may be partly fixed and partly variable. Split them by looking at several months of bills.
• Equipment replacement. Setting aside money for repairs and replacement keeps you from having a surprise cost later.

Cash break-even vs. accounting break-even

Accounting break-even includes non-cash costs such as depreciation, while cash break-even includes only money leaving your bank account, including loan principal and inventory purchases. Cash break-even is the number that tells you whether you can pay your bills; accounting break-even tells you whether you are profitable on paper. Run both when you carry debt or buy equipment.

Limits of the break-even model

The model assumes a constant price and constant unit costs, which stops being true at high volumes (you may need more staff) or when you give volume discounts. It also assumes you can actually sell the break-even number of units. Treat the result as a reality check on whether your plan is plausible, then compare it with sales you have achieved or can realistically expect. If the required sales exceed what your location, capacity or marketing can deliver, adjust the plan before you start.

Frequently asked questions

Is break-even the same as profit?

No. At break-even your profit is zero. Every sale beyond it adds its full contribution to profit.

How often should I recalculate?

Whenever prices, rent, wages or major supplier costs change, and at least once a quarter.

Can I use revenue instead of units?

Yes. Divide fixed costs by the contribution margin ratio to get break-even sales in dollars, which is easier for service businesses with varied prices.

What if my costs are mostly fixed?

Then your break-even is high but each sale beyond it is very profitable. This is typical for software and studios, and it makes volume forecasts especially important.

Sources

• U.S. Small Business Administration — business planning and cost management resources
• SCORE — free mentoring and templates for small business planning
• Related: cash runway guide for checking whether you can survive until you reach break-even