What are fixed costs vs variable costs?

Fixed costs remain constant regardless of output — rent, salaries, insurance, loan payments. Variable costs change with output — raw materials, production labor, packaging, shipping, payment processing fees.

What is contribution margin?

Contribution margin is the selling price minus the variable cost per unit. It represents how much each unit sold contributes toward covering fixed costs. A contribution margin ratio of 60% means 60 cents of every revenue dollar goes toward fixed costs and profit.

What is the margin of safety?

Margin of safety = (Projected Sales − Break-Even Sales) ÷ Projected Sales × 100%. It measures how far sales can fall before the business hits break-even. A 30% margin means sales could drop 30% before losses begin.

How can I lower my break-even point?

Three levers: reduce fixed costs (renegotiate rent, cut overhead), reduce variable costs per unit (better supplier pricing), or increase the selling price. Any combination widens the contribution margin and pushes break-even lower.

Break-Even Calculator — Units, Revenue & Margin

📊 Break-Even Calculator

Results update instantly

Fixed Costs / Month

Selling Price per Unit

Variable Cost per Unit

Projected Sales (units/month)

Analysis Period

Break-Even Point

0 units

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Contribution Margin

$0/unit

CM Ratio

Margin of Safety

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Revenue at Projected

Total Costs at Projected

Profit / (Loss)

How to Use the Break-Even Calculator

Enter your monthly fixed costs

Add up all costs that stay constant regardless of sales volume: rent, salaries, insurance, software subscriptions, loan payments.

Enter variable cost per unit

Input all costs that scale with each unit sold: materials, production labour, packaging, shipping, payment processing fees.

Enter your selling price

Input the price at which you sell one unit or deliver one service. For service businesses, this is the price per project or engagement.

Set projected sales and review

Enter your expected monthly sales volume to see profit/loss at that level and your margin of safety above break-even.

What Is a Break-Even Analysis?

A break-even analysis identifies the exact point at which total revenue equals total costs — neither profit nor loss. Every unit sold above break-even generates pure profit; every unit below generates a loss. It answers three critical questions: How many units must I sell to cover all costs? What revenue level is required before turning profitable? How much could sales fall before I start losing money?

The Break-Even Formula

📐 Break-Even Formula

Contribution Margin = Selling Price − Variable Cost per Unit
Break-Even Units = Fixed Costs ÷ Contribution Margin
Break-Even Revenue = Break-Even Units × Selling Price
Margin of Safety = (Projected − Break-Even) ÷ Projected × 100%

Worked Example: Product Business

A candle maker with $3,000/month fixed costs, $8 variable cost per candle, and a $28 selling price:

Contribution margin: $28 − $8 = $20 per candle
CM ratio: $20 ÷ $28 = 71.4%
Break-even: $3,000 ÷ $20 = 150 candles/month
Break-even revenue: 150 × $28 = $4,200/month

Every candle above 150 units earns $20 in profit. At 300 sales/month: (300 − 150) × $20 = $3,000 profit. Margin of safety: 50%.

Worked Example: Service Business

A freelance web designer with $2,200/month fixed costs, $150 variable cost per project, and $1,500 project fee:

Contribution margin: $1,500 − $150 = $1,350 per project
Break-even: $2,200 ÷ $1,350 = 1.63 → 2 projects/month

With a $1,350 margin per project, only 2 projects cover all costs — every project after that is nearly all profit.

Fixed vs Variable Costs: Getting It Right

Misclassifying costs is the most common mistake. Fixed costs stay constant at any volume: rent, salaried staff, insurance, loan repayments, subscription software. Variable costs scale with output: raw materials, production labor, packaging, shipping, credit card processing fees (typically 2.9%).

How to Lower Your Break-Even Point

Reduce fixed costs — renegotiate rent, reduce overhead, automate labor. A $1,000 reduction in monthly fixed costs directly lowers break-even by $1,000 ÷ contribution margin units.
Reduce variable costs — better supplier pricing, leaner production, economies of scale widen the contribution margin.
Increase selling price — higher-value positioning, premium tiers, bundling. Even a 10% price increase dramatically reduces break-even units.

Frequently Asked Questions

Q.What is the break-even point formula?▼

Break-Even Units = Fixed Costs ÷ Contribution Margin per Unit, where Contribution Margin = Selling Price − Variable Cost per Unit. In revenue terms: Break-Even Revenue = Fixed Costs ÷ Contribution Margin Ratio. Example: $10,000 fixed costs with a $30 CM per unit = break-even at 334 units.

Q.What is a good contribution margin ratio?▼

It varies by industry: SaaS/software 70–90%, services 50–80%, manufacturing 30–50%, retail 20–50%. A good ratio is one that lets you break even at a realistic sales volume given your fixed cost structure.

Q.Can break-even analysis handle multiple products?▼

Yes — using a weighted average contribution margin. Weight each product's CM by its share of the sales mix. If Product A (60% of sales, $20 CM) and Product B (40%, $10 CM): weighted CM = (0.6 × $20) + (0.4 × $10) = $16. Use $16 in the break-even formula. Shifts in the sales mix change the weighted CM.

Q.What are the limitations of break-even analysis?▼

Break-even analysis assumes constant selling price, constant variable cost per unit, and that all produced units are sold. In reality, prices may need to drop at higher volumes, variable costs may shift with bulk purchasing, and unsold inventory ties up cash. It is a planning tool — not a substitute for full financial modeling.

Q.How do taxes affect break-even analysis?▼

Standard break-even is pre-tax. For an after-tax break-even, calculate required pre-tax profit: Target Net Income ÷ (1 − Tax Rate). Add this to fixed costs before dividing by contribution margin. Most early-stage businesses use pre-tax analysis.

⚠️ Disclaimer Estimates for informational purposes only. Not legal or financial advice. Consult a qualified professional.