Gross Margin vs Contribution Margin
Quick guide: gross margin vs contribution margin.
Last updated: January 2, 2026 • Public quick guide
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Gross margin tells you profit after COGS. Contribution margin tells you profit after variable costs that scale with sales. Both matter, but they answer different questions.
- Gross margin = (Revenue − COGS) ÷ Revenue.
- Contribution margin = (Revenue − Variable costs) ÷ Revenue.
- Use contribution margin to decide whether scaling actually helps.
Decision path
- If you’re choosing products/SKUs, use contribution margin.
- If you’re negotiating costs, use gross margin.
- If both are weak, your pricing or costs are broken—start with unit economics.
- List your revenue per unit (real, after discounts).
- List COGS per unit (production costs tied to making the unit).
- List additional variable costs (payment fees, shipping, commissions).
- Compute gross margin and contribution margin side by side.
- Identify the biggest driver (price, COGS, variable costs).
- Change one lever and recalc.
Scaling a low contribution margin product just scales your pain.
Quick example
Margins compared:
| Metric | Includes | Best for |
|---|---|---|
| Gross margin | COGS only | Cost control and baseline profitability. |
| Contribution margin | COGS + variable selling costs | Scaling decisions and SKU strategy. |
| Net margin | Everything | Business health overview. |
If contribution margin is healthy, scaling can make sense. If it’s thin, fix the unit first.
- Calling every cost ‘COGS’ (blurs decisions).
- Using list price instead of actual realized price.
- Ignoring fees/returns/discounts in variable costs.
- Comparing margins across products with different units.
- Scaling before margins are stable.
FAQ
Which one should I track weekly?
Contribution margin is more actionable for week-to-week decisions.
Is labor COGS or overhead?
Depends. Direct labor tied to making units is often in COGS; admin labor is overhead. Be consistent.
Do I need net margin too?
Yes, monthly or quarterly. But for operator decisions, contribution margin is the workhorse.
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