A rising marketplace sales figure is good news only if the cost of earning it is rising more slowly. Fees, advertising, promotions and returns all sit between the sales number and the margin, and they are rarely reported in the same place.
What the sales number leaves out
Marketplace dashboards are built around sales: revenue, units, conversion. Those numbers matter, but on their own they cannot tell you whether growth is profitable. Several costs sit between a sale and the margin it contributes.
- Channel fees Referral or commission fees, and any fulfilment or storage charges.
- Advertising Sponsored placements and other retail media spend attributed to the sale.
- Promotions Discounts, coupons and deal pricing that lower the selling price.
- Returns and adjustments Refunds, returned stock that cannot be resold, and other charges.
How much of this data is available, and how easily, varies by marketplace, by seller account and by business model. Some costs arrive in settlement reports weeks later; others need to be estimated. That is a reason to agree definitions, not a reason to ignore the costs.
Agree the cost view with finance
Marketing, marketplace and finance teams often each have a different idea of what “margin” means. Before evaluating performance, agree a shared view: which costs are included, where each one comes from, and how anything that cannot be measured directly will be estimated.
This does not need to be perfect from day one. A definition that everyone accepts, with known gaps written down, is far more useful than a precise figure that only one team trusts.
Compare offers and products fairly
Once the cost view is agreed, products and offers can be compared on the same basis. A hypothetical example shows why this matters; the numbers below are invented for illustration only.
Hypothetical example: product A sells for 100 with fees of 15, advertising of 20 and a 10 discount during a promotion, leaving 55 before product cost. Product B sells for 80 with fees of 12, advertising of 5 and no discount, leaving 63. Product A looks stronger on sales, but contributes less before product cost.
Comparisons like this are only as reliable as the inputs. Where costs are estimated, say so, and check whether the conclusion changes if the estimate is wrong.
Decisions to make while the campaign is running
The most useful time to look at margin is during a campaign, not only after it. If agreed thresholds are set in advance, the team can act on them rather than debate them in the moment.
- Advertising bids Reduce spend on products whose advertising cost is eroding their contribution.
- Promotion depth Revisit discounts that are driving volume without adding margin.
- Stock and availability Protect products that are profitable and at risk of selling out.
- Listing quality Fix content issues that make paid traffic convert poorly.
The aim is not to cut every cost, but to make sure growth on the marketplace is growth the business actually wants.
Feeds, listings and marketplace management, run against agreed commercial measures.
Channel & marketplace operations
