How to use the break-even calculator
- Pick Products or Services. For services, choose hourly or per-project billing.
- Enter fixed costs as one total or as a list. Each line can be monthly or yearly; everything is converted to the period you choose.
- Enter your price and variable cost per unit, hour or project. Add any percentage a payment processor or platform takes as a fee.
- Add a target profit and expected sales if you want them. You get the sales needed to hit that profit, your margin of safety, and the lowest price that still covers costs at that volume.
- Read the chart and sensitivity table to see how far a price or cost change moves your break-even point. Copy the link to keep the scenario.
The break-even formula
Break-even units = Fixed costs ÷ (Price − Variable cost per unit)
Break-even revenue = Fixed costs ÷ Contribution margin ratio
The part in brackets is the contribution margin: what each sale leaves over after paying for itself. Fixed costs are the bills that arrive whether you sell anything or not.
Worked example: a product
You make ceramic mugs and sell them for $40. Clay, glaze, kiln time and packaging come to $15 a mug. Fixed costs are $3,000 a month: $1,200 workshop rent, $150 for software and a website, $150 of insurance ($1,800 a year) and a $1,500 salary draw for yourself.
- Contribution margin: $40 − $15 = $25 per mug
- Break-even: $3,000 ÷ $25 = 120 mugs a month
- Break-even revenue: 120 × $40 = $4,800 a month
Now add a 3% card fee. It takes $1.20 from every sale, so the margin drops to $23.80 and break-even rises to 126.05 mugs. You cannot sell 0.05 of a mug, so the answer rounds up to 127. A fee that sounds small costs you seven extra sales every month. This is the example the calculator opens with.
Worked example: a service
You are a freelance designer billing $75 an hour. Fixed costs are $4,550 a month: software, a coworking desk, insurance, an accountant and a $4,000 salary draw. Each billed hour carries about $5 of variable cost for usage-based tools and a little subcontracted help.
- Contribution margin: $75 − $5 = $70 per hour
- Break-even: $4,550 ÷ $70 = 65 billable hours a month, about 15 a week
Bill per project instead, at $1,800 with $150 of subcontractor and stock costs each, and the contribution is $1,650. Break-even is 2.76 projects, so you need 3 a month.
Contribution margin, explained
Contribution margin per unit is price minus variable cost. The contribution margin ratio is that amount divided by price: $23.80 ÷ $40 = 59.5%. It tells you how much of every sale goes toward fixed costs first and profit after.
- Compare offers by margin, not price. A $30 product with a $25 margin does more for you than a $50 product with a $15 margin.
- Do quick revenue maths. At a 59.5% ratio, every extra $1,000 of sales adds $595 toward costs and profit.
Service businesses usually have high ratios because the main input is your time, which belongs in fixed costs as your salary draw. That is why the limit is usually billable hours, not margin.
Using break-even to set your prices
Work backwards from a volume you can actually reach. If you can realistically sell 150 mugs a month, the calculator shows the lowest price that covers every cost at that volume: about $36.08 in the example. Below that you lose money even if every forecast comes true. If your target profit needs more hours than you have, the price is the problem, not your effort.
Check the sensitivity table before you discount. When margins are thin, a 10% price cut raises break-even by far more than 10%, because the whole cut comes out of your contribution margin.
Deciding on hires, tools and other fixed costs
Every new monthly cost needs its own sales to pay for it. Divide the cost by your contribution margin. In the mug example, a $200 a month tool needs about 9 more sales a month, and a $1,500 a month part-time assistant needs about 64 more. Ask whether the tool or hire will realistically bring in that many extra sales, or free enough of your time to make them.
Limitations of break-even analysis
- It assumes straight lines. In reality you discount, materials get cheaper in bulk and costs jump when you outgrow a space. Treat the result as an estimate near your current volume.
- It says nothing about demand. It tells you how many sales you need, not whether anyone will buy them.
- It ignores timing. You can be above break-even on paper and still run short of cash when clients pay late.
- It assumes one product, or an average. With several offers, use a weighted average or run each separately.
- Tax is not included. Income and self-employment tax come out of profit, so set your target profit high enough to cover them.
This is a planning tool, not financial advice. Check your figures against your own records, or with an accountant.
Frequently asked questions
What is a break-even point?
It is the sales volume at which total revenue equals total costs, so you make neither a profit nor a loss. Below it the period runs at a loss. Above it, every extra sale adds its contribution margin to profit.
How do I work out how many sales I need to break even?
Divide your fixed costs for the period by your contribution margin per sale, which is price minus variable cost. With $3,000 of monthly fixed costs and a $25 margin, you need 3,000 ÷ 25 = 120 sales a month. Round any fraction up.
Why does the calculator round break-even units up?
You cannot sell part of a unit, and rounding down would leave you slightly short of covering your costs. The exact figure is shown as well, along with how far short you would be one unit below it.
Should I include my own salary in fixed costs?
Yes, if you want break-even to mean the business pays you. Without a salary draw, break-even only shows when the business stops losing money while you work for free. Put a realistic monthly draw in fixed costs and use target profit for anything beyond it.
What is the difference between fixed and variable costs?
Fixed costs stay the same however much you sell in the period: rent, software subscriptions, insurance and your salary draw. Variable costs rise with each sale: materials, packaging, shipping, per-project subcontractors and payment fees.
What is the margin of safety?
It is how far your expected sales sit above break-even, shown in units, in revenue and as a percentage of expected sales. A 16% margin of safety means sales could fall 16% before you start losing money.
Does break-even analysis work for freelancers and service businesses?
Yes. Treat a billable hour or a project as the unit. The result tells you how many hours or projects you need each month, which you can compare with how many you can realistically sell and deliver.
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