Paid media
Contribution margin
Contribution margin is revenue minus the variable costs of delivering it: cost of goods, payment fees, shipping, returns and the advertising attributable to the sale.
What is contribution margin?
Contribution margin is revenue minus the variable costs of delivering it: cost of goods, payment fees, shipping, returns and the advertising attributable to the sale. It is what a sale actually contributes before fixed costs.
Why anybody cares
It is the figure advertising should be optimised against, and the one that reveals which products and channels are genuinely profitable.
What the work looks like
Calculated per product or order and fed into bidding through conversion value adjustments, so the platform optimises toward profit rather than revenue.
What it is not
It is not gross margin. Omitting returns and payment fees produces a figure that flatters the channels with the worst return rates.
It is a small idea with a disproportionate effect on how a site performs.
Where this comes up in the work
It is part of Ecommerce SEO, and more specifically of Category page optimisation. Across the rest of the work it shows up in:
- App Store Optimization, because working out whether the problem is impressions or the install decision depends on it
- Marketplace Marketing, in which it shows up as reading the questions section for the gaps your listing left
- Content and Editorial, where it decides refreshing on decay rather than on the calendar
- Lifecycle and Email, since keeping the sending domain healthy before scale makes it urgent is only as good as this is
What to check
Two questions that establish whether this is actually in order on a given site:
- Whether the exception somebody added two years ago is still needed
- Whether it was verified in the logs or inferred from a dashboard
Common questions
How is contribution margin audited?
Calculated per product or order and fed into bidding through conversion value adjustments, so the platform optimises toward profit rather than revenue.
Who owns contribution margin in a business?
Whoever is accountable for consolidating the structure enough that the delivery system can learn. Problems with this tend to persist because nobody is. When this comes up in a pitch, Local SEO and Marketplace Marketing are the pages that settle it.
How much work is contribution margin?
Less than people expect to check and sometimes more than they expect to fix. Calculated per product or order and fed into bidding through conversion value adjustments, so the platform optimises toward profit rather than revenue. This sits between Lead form or Landing page and Local SEO or National SEO, and borrows from both.
Where does contribution margin sit in the priority order?
High if it is actually broken, low if it is merely imperfect. The check tells you which.
What is the evidence for contribution margin mattering?
It is the figure advertising should be optimised against, and the one that reveals which products and channels are genuinely profitable. The evidence is specific to the site, which is why the check comes before the recommendation. The adjacent reading is What does a technical SEO audit actually check?, and What is a good conversion rate? for the version of this question that comes up later.
Is contribution margin just another name for something?
It is not gross margin. Omitting returns and payment fees produces a figure that flatters the channels with the worst return rates. Worth clarifying before agreeing to work on it. This connects directly to FAQPage schema, and less obviously to Featured snippet.
Have someone senior look at the numbers
No pitch deck. A short call, a look at the data you already have, and a view on whether this is worth doing at all.