Metrics
Contribution Margin
Quick definition
Revenue minus all variable costs of a unit or segment; what each incremental customer or product line contributes before fixed costs.
Contribution margin is revenue minus the variable costs directly tied to producing that revenue, showing what a customer, product line, or channel contributes toward covering fixed costs and profit. It goes a step beyond gross margin by including variable costs that may sit below the gross-margin line, such as variable support or per-transaction costs. Contribution margin is central to unit economics and to deciding which segments, channels, or products actually make money once you strip out shared overhead.
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Insights, guides, and tools where Contribution Margin shows up.
Frequently asked questions
- What is Contribution Margin?
- Contribution margin is revenue minus the variable costs directly tied to producing that revenue, showing what a customer, product line, or channel contributes toward covering fixed costs and profit. It goes a step beyond gross margin by including variable costs that may sit below the gross-margin line, such as variable support or per-transaction costs. Contribution margin is central to unit economics and to deciding which segments, channels, or products actually make money once you strip out shared overhead.
- Why is Contribution Margin important for startups?
- Contribution Margin is a metrics concept that matters for startup founders because it shows up in fundraising readiness, financial decision-making, and operational discipline at the stage where mistakes are expensive to undo. Founders who understand it are better prepared for diligence, board meetings, and investor conversations.
- What category does Contribution Margin belong to?
- Contribution Margin is a Metrics term in the StartupCFO finance glossary, alongside other metrics concepts that founders, CFOs, and accountants use in startup operations and reporting.
- Where can I learn more about Contribution Margin?
- Beyond this definition, see the related metrics terms below, or explore StartupCFO's insights and tools that put Contribution Margin in context. For specific situations, talk to a fractional CFO who can walk through your numbers.
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