# Contribution Margin Calculator

Calculate contribution margin ratio, per-unit margin, and break-even volume. See how much revenue covers fixed costs and generates profit.

## What this calculates

Find out how much of your revenue actually goes toward covering fixed costs and generating profit. Enter your revenue, variable costs, units sold, and fixed costs to see your contribution margin ratio, per-unit margin, and break-even point.

## Inputs

- **Total Revenue** ($) — min 0 — Total sales revenue for the period.
- **Total Variable Costs** ($) — min 0 — Total variable costs (materials, labor, shipping, etc.).
- **Units Sold** — min 1 — Number of units sold during the period.
- **Total Fixed Costs** ($) — min 0 — Total fixed costs (rent, salaries, insurance, etc.).

## Outputs

- **Total Contribution Margin** — formatted as currency — Revenue minus variable costs.
- **Contribution Margin Ratio** — formatted as percentage — Percentage of each dollar that covers fixed costs and profit.
- **Per-Unit Contribution Margin** — formatted as currency — Contribution margin earned on each unit sold.
- **Break-Even Volume (Units)** — Units you need to sell to cover all fixed costs.
- **Break-Even Revenue** — formatted as currency — Revenue needed to cover all fixed costs.

## Details

The contribution margin tells you how much money is left from each sale after covering variable costs. If your company earns $500,000 in revenue with $300,000 in variable costs, the contribution margin is $200,000, or 40%. That means 40 cents of every dollar earned goes toward fixed costs and profit.

Per-unit contribution margin is equally useful. If you sold 10,000 units, each unit contributes $20 toward fixed costs. With $100,000 in fixed costs, you need to sell 5,000 units just to break even. Everything beyond that is profit.

## Why Contribution Margin Matters

This metric helps you decide which products to prioritize. A product with a 60% contribution margin deserves more attention than one at 15%, assuming similar sales potential. It also helps with pricing decisions -- if you lower prices by 10%, how many more units do you need to sell to maintain the same total contribution?

Manufacturers, retailers, and SaaS companies all rely on contribution margin analysis. For SaaS, variable costs are often low (hosting, payment processing), resulting in contribution margins of 80-90%. For retail, margins typically range from 20-50% depending on the product category.

## Frequently Asked Questions

**Q: What is a good contribution margin ratio?**

A: It depends on your industry. Software and SaaS companies often see 80-90% contribution margins because variable costs are minimal. Retail businesses typically range from 20-50%. Manufacturing can vary widely from 15-60%. The key is comparing your ratio against industry benchmarks and tracking it over time.

**Q: What is the difference between contribution margin and gross margin?**

A: Gross margin subtracts cost of goods sold (COGS) from revenue, while contribution margin subtracts all variable costs from revenue. Variable costs include COGS plus variable selling and administrative expenses like shipping, sales commissions, and payment processing fees. Contribution margin gives you a more complete picture of per-unit profitability.

**Q: How do I use contribution margin for pricing?**

A: Start with your variable cost per unit and add your desired contribution per unit. For example, if a product costs $12 in variable costs and you want a 60% contribution margin, the price should be $12 / (1 - 0.60) = $30. You can also use it to evaluate discounts -- a 10% price cut on a 40% margin product requires 33% more volume to maintain the same total contribution.

**Q: What happens if contribution margin is negative?**

A: A negative contribution margin means you lose money on every unit sold, and selling more only increases losses. This is a critical warning sign. You need to either raise prices, reduce variable costs, or discontinue the product. No amount of volume can fix a negative contribution margin.

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Source: https://vastcalc.com/calculators/finance/contribution-margin
Category: Finance
Last updated: 2026-04-08