Unit Economics Breakdown Tool

Enter Unit Economics

Understanding Unit Economics

Unit economics measures the direct revenues and costs associated with a single unit of your product or service. It answers the question: "Do we make money each time we sell something?" This is the foundation for understanding whether your business model is viable at scale.

Key Formulas

What is Contribution Margin?

Contribution margin is the profit you make on each unit after covering variable costs. This profit "contributes" toward paying fixed costs and generating profit.

• Variable costs change with each unit sold: materials, shipping, payment processing, packaging
• Fixed costs stay constant regardless of sales: rent, salaries, software subscriptions

If contribution margin is negative, every additional sale increases your losses. No amount of volume growth fixes negative unit economics — the cost structure or pricing must change first.

Healthy Contribution Margins by Industry

Why Unit Economics Matter

1. Viability check: If contribution margin is negative, you lose money on every sale — no amount of volume will save you
2. Pricing decisions: Understand how much room you have to adjust prices or absorb cost increases
3. Scale planning: Know exactly how many units you need to sell to break even and become profitable
4. Investor confidence: Strong unit economics signal a sustainable, scalable business model

Quick Example

You sell a product for $50. Variable costs (materials, shipping, processing) total $22. Your contribution margin is $28 per unit (56%). If monthly fixed costs are $8,400, you need to sell at least 300 units/month to break even.

For a deeper walkthrough with worked examples for e-commerce, SaaS, and service businesses, read our complete guide to unit economics.

Related Tools

• Break-Even Calculator — find the exact sales volume where revenue covers all costs
• CAC Calculator — measure your customer acquisition cost
• LTV Calculator — estimate customer lifetime value
• CAC Payback Period Calculator — how long to recoup acquisition costs
• Burn Rate & Runway Calculator — how long your cash will last

Frequently Asked Questions

What is the difference between contribution margin and gross margin?

Gross margin subtracts only the cost of goods sold (COGS) from revenue. Contribution margin subtracts all variable costs — including shipping, payment processing fees, and commissions — not just COGS. Contribution margin gives a more complete picture of per-unit profitability.

What is a good contribution margin?

It depends on the industry. SaaS companies typically see 70–90%. E-commerce ranges from 20–50%. Food and beverage often operates at 10–30%. The key question is whether your margin is high enough to cover fixed costs at a realistic sales volume.

Can contribution margin be negative?

Yes. If variable costs per unit exceed revenue per unit, contribution margin is negative. This means every sale loses money. Scaling a negative-margin business without fixing unit economics will only increase losses.

Is customer acquisition cost (CAC) a variable or fixed cost?

It depends on your business model. If you pay per click or per lead, CAC behaves like a variable cost. For businesses with mostly organic growth, CAC may be closer to a fixed cost (marketing team salaries). Many analysts model CAC separately through LTV/CAC analysis.

How often should I recalculate unit economics?

At minimum, quarterly. Recalculate whenever you change prices, switch suppliers, adjust shipping methods, or enter new markets. Variable costs shift over time, and outdated numbers lead to bad decisions.

How do subscription businesses calculate unit economics?

For subscriptions, "one unit" is typically one customer-month. Revenue per unit is the subscription fee. Variable costs include hosting per user, support per user, and payment processing. The contribution margin per customer-month feeds into LTV calculations.

Unit Economics Breakdown Tool FAQ