Break-Even Calculator: How to Calculate Your Break-Even Point

What Is the Break-Even Point?

The break-even point is where total revenue exactly equals total costs — zero profit, zero loss. Every unit sold beyond this point generates pure profit (after variable costs). Every unit below it means a loss.

Break-Even Units = Fixed Costs ÷ (Price per Unit − Variable Cost per Unit)

The denominator (Price − Variable Cost) is the contribution margin per unit — how much each sale contributes toward covering fixed costs after paying for itself.

Fixed Costs vs Variable Costs

Cost Type	Characteristics	Examples
Fixed Costs	Don't change with sales volume; paid regardless	Rent, salaries, equipment depreciation, software subscriptions
Variable Costs	Increase proportionally with each unit sold	Raw materials, packaging, shipping, sales commissions

Worked Example

Suppose you sell handmade candles online:

Item	Amount
Monthly fixed costs (rent, software, marketing base)	$2,000
Selling price per candle	$25
Variable cost per candle (materials + packaging + shipping)	$10
Contribution margin per unit	$25 − $10 = $15
Monthly break-even quantity	$2,000 ÷ $15 = 134 candles/month

You need to sell at least 134 candles per month to cover costs. The 135th candle — and every one after — puts $15 of pure profit in your pocket.

How to Use the Break-Even Calculator

The tool.tl Break-Even Calculator takes three inputs:

• Total monthly fixed costs
• Selling price per unit
• Variable cost per unit

And outputs: break-even quantity, break-even revenue, and a profit curve showing performance across different sales volumes.

Using Break-Even Analysis for Pricing Decisions

Break-even analysis answers critical business questions:

• How low can I price? Cutting price reduces contribution margin, requiring more units to break even
• How many customers do I need? If current volume is below break-even, what marketing investment closes the gap?
• Can I afford to hire? Adding a $3,000/month employee raises your fixed costs — how many more units do you need to sell?

Limitations of Break-Even Analysis

• Assumes linearity — In practice, bulk purchasing discounts lower variable costs at scale, and capacity constraints raise them
• Ignores time value of money — Breaking even isn't the same as a good investment; capital has an opportunity cost
• Single product assumption — Multi-product businesses need weighted contribution margins, not a simple average

Related Financial Metrics

Metric	What It Tells You	Tool
Break-Even	Minimum sales to cover all costs	Break-Even Calculator
Profit Margin	How much of each dollar of revenue is profit	Profit Margin
ROI	Return on a specific investment	ROI Calculator
LTV/CAC	Customer lifetime value vs acquisition cost	LTV Calculator

Frequently Asked Questions

How do I calculate break-even for a service business?

For services, use billable hours as your unit: Break-even hours = Fixed Costs ÷ (Hourly Rate − Variable Cost per Hour). Example: $5,000/month fixed costs, $150/hour rate, $20/hour variable costs → break-even = $5,000 ÷ $130 = 38.5 billable hours/month.

What about businesses with multiple products?

Calculate a weighted average contribution margin based on each product's share of total sales. Divide total fixed costs by the weighted contribution margin ratio to get the overall break-even revenue. Then allocate by product mix to get unit targets.

Should break-even be my sales target?

No — break-even is the floor, not the goal. Your actual target should be enough above break-even to: repay startup investment, build a cash reserve, fund future growth, and provide an adequate return for the risk you're taking as a business owner.