Break-Even Point Formula: How to Calculate It, with Examples
Use the break-even point formula to find the sales you need to cover costs, in units and dollars, with worked examples for product and service businesses.
Quick answer: The break-even point formula is fixed costs ÷ (price per unit − variable cost per unit). The result is the number of units you must sell to cover all costs with zero profit. To get the answer in sales dollars, divide fixed costs by the contribution margin ratio instead.
Break-even analysis answers one of the most practical questions in business: how much do I need to sell before I stop losing money? It helps you set prices, decide whether to sign a new lease or hire someone, and judge whether a new product is worth launching. This guide explains both versions of the break-even point formula, shows the calculator steps you can do in a spreadsheet, and works through examples for a product business and a service business, with every calculation shown.
Before you start, gather a recent profit and loss statement. Nearly every number you need is already on it; you just need to sort the costs into fixed and variable.
What is the break-even point?
The break-even point is the level of sales at which total revenue equals total costs. Below it you make a loss; above it you make a profit. It can be expressed as:
- Units: products, hours, projects or customers.
- Sales dollars: revenue needed in a month or year.
- Time: how many months until cumulative profit covers your start-up investment (often called payback period).
The break-even point formula
Break-even in units
Break-even units = Fixed costs ÷ (Selling price per unit − Variable cost per unit)
The bottom part, price minus variable cost, is the contribution margin per unit: the amount each sale contributes toward fixed costs and then profit.
Break-even in sales dollars
Break-even sales = Fixed costs ÷ Contribution margin ratio
where contribution margin ratio = (Price − Variable cost) ÷ Price. You can also calculate the ratio from totals: (Total sales − Total variable costs) ÷ Total sales. This version is handy when you sell many products at different prices.
Break-even with a profit target
Required units = (Fixed costs + Target profit) ÷ Contribution margin per unit
Fixed vs variable costs
Sorting costs correctly is the step most people get wrong. Fixed costs stay about the same each month whatever your sales volume; variable costs move with every sale.
| Usually fixed | Usually variable | Often mixed (split them) |
|---|---|---|
| Rent and lease payments | Raw materials and inventory | Utilities with a base charge |
| Salaried staff | Packaging and shipping | Phone and internet with usage fees |
| Insurance | Card and payment processing fees | Staff with base pay plus commission |
| Software subscriptions | Sales commissions | Vehicle costs (lease fixed, fuel variable) |
| Loan interest | Subcontractors paid per job | Marketing with a retainer plus per-lead fees |
| Accounting and legal retainers | Platform or marketplace fees | Hourly staff scheduled to demand |
If you sell products, your cost of goods sold is mostly variable cost. For a service business, variable costs are usually smaller: subcontractors, materials used on jobs and payment fees.
Calculator steps: how to work out break-even
- List monthly fixed costs. Use an average of the last three to six months. Annual bills, such as insurance, should be divided by 12.
- Find variable cost per unit. Add every cost that occurs because of one sale.
- Set your selling price. Use the price customers actually pay after typical discounts, not list price. Sales tax is not part of the price for this purpose, since you pass it to the government; the sales tax calculator helps you separate it.
- Calculate contribution margin. Price minus variable cost per unit, and the ratio as margin ÷ price.
- Divide. Fixed costs ÷ contribution margin per unit gives units; fixed costs ÷ ratio gives dollars.
- Round up. You cannot sell 0.3 of a product or project, so round units up to the next whole number.
- Sanity-check. Compare the answer with your actual sales capacity and past months.
In a spreadsheet, put fixed costs in cell B1, price in B2 and variable cost in B3. Then break-even units are =ROUNDUP(B1/(B2-B3),0) and break-even sales are =B1/((B2-B3)/B2).
Worked example 1: a product business
An illustrative candle maker sells candles for $30 each. Variable costs per candle are wax and wick $6, jar and label $4, packaging $2 and card fees about $1, so $13 in total. Monthly fixed costs are studio rent $1,200, insurance $100, website and software $150, and a part-time assistant $1,950, totaling $3,400.
- Contribution margin per unit: $30 − $13 = $17.
- Contribution margin ratio: $17 ÷ $30 ≈ 0.567, or 56.7%.
- Break-even units: $3,400 ÷ $17 = 200 candles a month.
- Break-even sales: 200 × $30 = $6,000. Check with the ratio method: $3,400 ÷ 0.5667 ≈ $6,000.
Now add a target. If the owner wants $2,500 a month of profit to pay themselves: ($3,400 + $2,500) ÷ $17 = $5,900 ÷ $17 ≈ 347.06, which rounds up to 348 candles.
What if prices or costs change?
| Scenario | Contribution per candle | Break-even units |
|---|---|---|
| Base case: $30 price, $13 variable | $17 | $3,400 ÷ $17 = 200 |
| Price up to $34 | $21 | $3,400 ÷ $21 ≈ 161.9 → 162 |
| Supplier raises jar cost by $2 | $15 | $3,400 ÷ $15 ≈ 226.7 → 227 |
| 20% discount promotion ($24 price) | $11 | $3,400 ÷ $11 ≈ 309.1 → 310 |
The discount row is the lesson many owners miss: a 20% price cut raises the volume needed to break even by more than half (310 ÷ 200 = 1.55). Our guide to markup vs margin explains why discounts hit profit harder than they seem, and the article on showing a discount on an invoice covers how to present them clearly.
Worked example 2: a service business
An illustrative bookkeeping freelancer charges $60 an hour. Variable costs per billable hour are a share of software that scales with clients ($3) and payment fees of about 3% ($1.80), so $4.80. Monthly fixed costs are a co-working desk $300, insurance $80, other software $120, phone and internet $100, and a $3,000 salary the owner wants to draw, totaling $3,600.
- Contribution per billable hour: $60 − $4.80 = $55.20.
- Break-even hours: $3,600 ÷ $55.20 ≈ 65.2, so 66 billable hours a month.
- At roughly 4.3 weeks a month, that is 66 ÷ 4.3 ≈ 15.3 billable hours a week.
Since many freelancers can bill only part of their working week, 15 billable hours may be realistic, but it leaves little room for slow months. If the rate rose to $70, contribution would be about $70 − $5.10 = $64.90 (fees rise with price), and break-even falls to $3,600 ÷ $64.90 ≈ 55.5, or 56 hours. Use our guide on how to set freelance rates to test pricing changes like this.
Worked example 3: several products and a sales mix
Most businesses sell more than one thing, so a single price and variable cost do not exist. The fix is to use the sales-dollar version of the break-even point formula with a weighted contribution margin ratio. Take an illustrative café with monthly fixed costs of $9,000 and this sales mix from last month's records:
| Product line | Monthly sales | Variable costs | Contribution |
|---|---|---|---|
| Coffee and drinks | $12,000 | $3,000 | $9,000 |
| Food | $6,000 | $3,600 | $2,400 |
| Retail beans and merchandise | $2,000 | $1,200 | $800 |
| Total | $20,000 | $7,800 | $12,200 |
- Weighted contribution margin ratio: $12,200 ÷ $20,000 = 0.61, or 61%.
- Break-even sales: $9,000 ÷ 0.61 ≈ $14,754 a month.
- Margin of safety: ($20,000 − $14,754) ÷ $20,000 ≈ 26%, meaning sales could fall about a quarter before the café makes a loss.
The answer holds only if the mix stays similar. If food grows to half of sales, the weighted ratio falls because food contributes just 40% ($2,400 ÷ $6,000), and break-even rises. Recalculate whenever the mix shifts noticeably.
Break-even point and your budget
Break-even analysis works best as part of a plan. When you build a small business budget, calculate break-even for the planned fixed costs; if the required sales look unrealistic, cut costs or rethink pricing before the year starts. Then use a cash flow forecast to check timing, because break-even is measured in sales, not cash received. A month where you invoice $6,000 but customers pay in 45 days still leaves a cash gap.
The SBA suggests estimating your costs carefully before launching; its guide to calculating startup costs is a useful companion when you are working out the break-even point for a new business.
Common break-even mistakes
- Leaving out the owner's pay. A business that only breaks even without paying you is not sustainable.
- Using list price instead of actual price. Discounts, refunds and coupons lower the real contribution.
- Misclassifying costs. Treating payment fees or shipping as fixed understates variable cost per unit.
- Forgetting annual and irregular costs. Insurance, licenses and equipment repairs should be spread across months.
- Averaging very different products. If margins vary widely, use the sales-dollar method with a realistic sales mix.
- Treating break-even as a cash target. It ignores payment timing, loan principal and inventory purchases.
- Calculating once and never again. Recalculate when rent, wages, supplier prices or your prices change.
Break-even checklist
- Fixed costs listed and averaged monthly, including annual bills divided by 12.
- Owner's salary or draw included as a fixed cost.
- Variable costs per unit include materials, shipping, payment fees and commissions.
- Selling price reflects typical discounts, with sales tax excluded.
- Break-even calculated in units and in sales dollars.
- Profit target version calculated.
- Scenarios tested for price increases, cost increases and discounts.
- Result compared with actual capacity and recent sales.
- Calculation repeated at least quarterly.
Next step
Run the break-even point formula on last quarter's numbers, then compare the answer with what you actually sold. If you are above break-even but cash is still tight, the problem may be collection speed rather than profit. Send invoices promptly with a clear due date using the free invoice generator, and explore more planning tools in the business finance section.
Frequently asked questions
What is the break-even point formula?
Break-even point in units equals fixed costs divided by contribution margin per unit, where contribution margin per unit is the selling price minus the variable cost per unit. Break-even in sales dollars equals fixed costs divided by the contribution margin ratio, which is contribution margin per unit divided by price. At that level of sales the business makes neither a profit nor a loss.
How do I calculate break-even point in sales dollars?
First find the contribution margin ratio: (price − variable cost) ÷ price, or total contribution margin ÷ total sales. Then divide fixed costs by that ratio. For example, with fixed costs of $10,000 a month and a 40% contribution margin ratio, break-even sales are $10,000 ÷ 0.40 = $25,000 a month. This version works well when you sell many different products or services.
What is the difference between fixed and variable costs?
Fixed costs stay roughly the same regardless of how much you sell in a period, such as rent, insurance, salaries and software subscriptions. Variable costs rise and fall with each sale, such as materials, packaging, shipping, payment processing fees and sales commissions. Some costs are mixed, like a phone plan with a base fee plus usage, so split them into their fixed and variable parts.
What is a contribution margin?
Contribution margin is the amount each sale contributes toward covering fixed costs and then generating profit. Per unit, it is the selling price minus the variable cost of that unit. If you sell a product for $50 and it costs $20 in materials and fees, each sale contributes $30. Once total contributions exceed fixed costs, every additional sale adds its contribution to profit.
How do I calculate break-even for a service business?
Use hours, projects or clients as your unit. Divide monthly fixed costs by the contribution per hour or project, meaning the price minus variable costs such as subcontractors, materials or payment fees. A freelancer with $4,000 of monthly fixed costs and $80 of contribution per billable hour needs 50 billable hours a month to break even, before paying themselves a salary.
How can I lower my break-even point?
There are three levers: reduce fixed costs, reduce variable costs per unit, or raise prices. Raising prices or cutting variable costs increases the contribution margin, so fewer sales are needed. Cutting fixed costs lowers the amount that must be covered. Changing the sales mix toward higher-margin products also helps. Test each change with the formula before deciding.
How do I include a target profit in break-even analysis?
Add your target profit to fixed costs before dividing. Required units equal (fixed costs + target profit) ÷ contribution margin per unit. If fixed costs are $6,000, you want $3,000 of profit and each unit contributes $25, you need ($6,000 + $3,000) ÷ $25 = 360 units. This is sometimes called target profit analysis or a cost-volume-profit calculation.
What are the limitations of break-even analysis?
It assumes prices, variable costs and fixed costs stay constant across the range of sales, which is rarely exact. It also assumes everything you produce is sold and treats a mix of products as a single average. It says nothing about cash timing, so a business can reach break-even on paper while still waiting for customers to pay. Use it as a planning tool, not a forecast.
Should the owner's salary count as a fixed cost?
For planning, yes. If you leave out what you need to pay yourself, the break-even point shows only when the business stops losing money, not when it supports you. Many owners calculate two figures: break-even without owner pay and break-even including a realistic salary or draw. The second number is the one that tells you whether the business is truly sustainable.
Invoice Creator Editorial Team
Guides on invoicing, cash flow and small-business finance from Invoice Creator, operated by Next Software Development Company. Content is reviewed for accuracy against the fields our own invoice generator produces.
Try the invoice generator