Break-Even Calculator

About Break-Even Calculator

How the Break-Even Formula Works

The core formula is straightforward: Break-Even Units = Fixed Costs / (Selling Price per Unit - Variable Cost per Unit). The denominator is called the contribution margin per unit - the amount each sale puts toward covering fixed costs. Once total contribution equals total fixed costs, you have reached break-even.

Formula	Components	What It Tells You
Break-Even Units = Fixed Costs / (Price - Variable Cost)	Fixed costs: rent, salaries, insurance. Variable cost: materials, shipping per unit. Selling price: what you charge per unit.	The exact number of units where revenue = total costs
Contribution Margin = Selling Price - Variable Cost	The amount each unit "contributes" toward covering fixed costs	Higher margin = fewer units needed to break even
Contribution Margin Ratio = Contribution Margin / Selling Price	Contribution margin as a percentage of the selling price	Shows what fraction of each sale covers fixed costs
Break-Even Revenue = Break-Even Units x Selling Price	Total revenue at the break-even point	The revenue target you must hit before any profit appears

The contribution margin ratio is particularly useful for multi-product businesses. If your ratio is 0.50, then half of every pound or dollar of revenue goes toward covering fixed costs. A ratio below 0.20 means you need very high sales volume to break even, while a ratio above 0.60 suggests strong pricing power.

Worked Example

A small candle-making business has the following monthly numbers:

Input	Value
Fixed costs (monthly)	$8,000 (studio rent, insurance, website, one salaried employee)
Variable cost per unit	$12 (wax, fragrance, jar, label, packaging)
Selling price per unit	$32

Step 1: Contribution margin = $32 - $12 = $20 per candle.

Step 2: Break-even units = $8,000 / $20 = 400 candles per month.

Step 3: Break-even revenue = 400 x $32 = $12,800.

Step 4: Contribution margin ratio = $20 / $32 = 0.625, or 62.5%.

This business needs to sell 400 candles per month - roughly 13 per day - to cover all costs. Every candle beyond 400 generates $20 of pure profit. If they raise the price by $3, the break-even drops to 400 x ($20/$23) = 348 candles. That is the power of small pricing adjustments on break-even.

Profit and Loss at Different Sales Volumes

Using the candle business example above, here is what happens at different sales levels:

Units Sold	Revenue	Total Costs	Profit / Loss
200 (50% of BEP)	$6,400	$10,400	-$4,000
300 (75%)	$9,600	$11,600	-$2,000
400 (break-even)	$12,800	$12,800	$0
500 (125%)	$16,000	$14,000	+$2,000
600 (150%)	$19,200	$15,200	+$4,000
800 (200%)	$25,600	$17,600	+$8,000

Notice how losses and profits scale symmetrically. Selling 100 units below break-even costs $2,000; selling 100 above earns $2,000. This linear relationship makes break-even analysis a quick way to gauge how sensitive your bottom line is to volume changes.

Why Break-Even Analysis Matters

Cash flow problems cause 82% of small business failures, according to SCORE. Knowing your break-even point does not guarantee success, but it does give you a concrete sales target rather than a vague hope of profitability. U.S. Bureau of Labor Statistics data shows that about 20% of new businesses close within their first year, 49% within five years, and 65% within ten years. Many of those closures trace back to pricing that never covered costs.

Most small businesses take two to three years to become consistently profitable. Restaurants and marketplace businesses can take 18 to 36 months or longer. Businesses with lower startup costs - online stores, consulting, freelancing - tend to break even faster because their fixed cost base is smaller. Running a break-even analysis before launch tells you exactly how many sales you need each month and how long your cash reserves need to last.

Fixed vs Variable Costs

Getting the split right between fixed and variable costs is the most important input in a break-even analysis. Misclassifying a variable cost as fixed (or vice versa) will skew the result.

Cost Type	Examples	Behaviour
Fixed costs	Rent, salaries, insurance, software subscriptions, loan payments, accounting fees	Stay the same regardless of how many units you sell
Variable costs	Raw materials, packaging, shipping, sales commission, payment processing fees, per-unit labour	Increase proportionally with each unit sold
Semi-variable	Utilities, overtime wages, equipment maintenance, customer support staffing	Have a fixed base plus a variable component - split into fixed and variable for this analysis

A common mistake is forgetting payment processing fees. If you sell online, expect to pay 2-3% of each sale to your payment provider. On a $50 item, that is $1.00-$1.50 per unit - a variable cost that adds up. Similarly, marketplace fees (Amazon, Etsy, eBay) are variable costs typically ranging from 6-15% of the selling price.

Break-Even for Service Businesses

The formula works the same way for services - just define a "unit" as a billable hour, project, or client. Here are practical examples across different service models:

Business Type	Unit	Fixed Costs Example	Variable Cost Example	Price Example
Freelance consultant	Billable hour	Software, co-working space, insurance	Travel, subcontractor fees	Hourly rate
SaaS company	Monthly subscriber	Server costs, salaries, office	Payment processing, support per user	Monthly subscription price
Restaurant	Cover (meal served)	Rent, staff wages, equipment leases	Food cost per meal, disposables	Average spend per customer
E-commerce store	Order	Website hosting, warehouse, staff	Product cost, packaging, shipping	Average order value
Gym / fitness studio	Monthly membership	Lease, equipment finance, insurance	Towels, cleaning, class instructor fees	Monthly membership fee

For a freelance consultant earning $150/hour with $4,000/month in fixed costs and $20/hour in variable costs (travel, software), the break-even is $4,000 / ($150 - $20) = 31 billable hours per month. That is roughly 8 hours per week - leaving the rest for business development and admin.

What Is the Margin of Safety?

The margin of safety measures how far current (or expected) sales sit above the break-even point. It is calculated as: Margin of Safety = (Actual Sales - Break-Even Sales) / Actual Sales x 100%. If you sell 600 candles per month against a break-even of 400, your margin of safety is (600 - 400) / 600 = 33%. That means sales could drop by a third before you start losing money. A margin of safety above 20% is generally considered comfortable for small businesses, while anything below 10% signals vulnerability to even small demand shifts.

What Affects the Break-Even Point?

Change	Effect on Break-Even	Practical Action
Increase selling price by 10%	Break-even decreases significantly	Test price elasticity - will customers pay more?
Reduce variable costs by 10%	Break-even decreases	Negotiate supplier prices, buy in bulk, optimise production
Reduce fixed costs by 10%	Break-even decreases	Downsize office, renegotiate lease, cut unused subscriptions
Add fixed costs (new hire)	Break-even increases	Ensure the hire generates enough incremental revenue to justify the higher break-even
Mix shift to higher-margin products	Weighted break-even decreases	Promote or bundle high-margin items

Price increases typically have the largest effect on break-even because they increase contribution margin without adding any cost. A 10% price increase on a product with 50% contribution margin ratio drops the break-even by roughly 17%. Variable cost reductions have the same per-unit effect but are often harder to achieve.

Common Break-Even Mistakes

Several errors frequently skew break-even analysis results:

Ignoring semi-variable costs. Utilities, overtime, and customer support have both fixed and variable components. Lumping them entirely into one category will understate or overstate your break-even.

Using annual fixed costs with monthly sales targets. Make sure you use the same time period for all figures. If your rent is $24,000/year, enter $2,000/month when calculating monthly break-even.

Forgetting tax. Break-even analysis works with pre-tax figures. Once you pass break-even, your actual take-home profit will be reduced by income tax and potentially VAT or sales tax. Use the profit margin calculator to model net margins after tax.

Assuming a single product. If you sell multiple products at different prices and margins, use a weighted average contribution margin. The calculator works with one product at a time, so run it for each product line or use the blended average.

Contribution Margin Benchmarks by Industry

Knowing typical contribution margins for your industry helps you judge whether your break-even is realistic. NYU Stern publishes annual data on operating margins across sectors, and e-commerce benchmarks from TrueProfit analysis of over 5,000 stores show the following patterns:

Industry / Model	Typical Gross Margin	Notes
Software / SaaS	70-85%	Very low variable costs once built; break-even driven by fixed costs (staff, servers)
E-commerce (private label)	60-65%	Product cost, packaging, shipping eat into margins
E-commerce (dropshipping)	65-70%	No inventory holding costs, but lower control over quality
Consulting / professional services	50-60%	Variable costs are mainly labour and travel
Restaurants	25-35%	Food costs are high; volume is critical to break even
Manufacturing	25-45%	Raw material and labour costs dominate
Retail (physical)	40-55%	Rent and staffing are high fixed costs

Businesses with lower margins need higher sales volume to break even, which is why restaurants and manufacturers often have longer paths to profitability.

To evaluate the profitability of your business beyond break-even, the profit margin calculator breaks down gross, operating, and net margin. The ROI calculator helps assess whether an investment in new equipment or marketing will pay off relative to its cost. For startups tracking how long their cash will last before break-even, the startup runway calculator estimates months of runway based on burn rate.

Sources

• U.S. Small Business Administration - Break-Even Point
• U.S. Bureau of Labor Statistics - Business Establishment Age and Survival
• SCORE - Small Business Failure Rates
• NYU Stern - Operating and Net Margins by Industry
• TrueProfit - Good Gross Profit Margins for E-Commerce (2026)
• Corporate Finance Institute - Margin of Safety Formula