Profitability Analytics for Ecommerce Sellers
9 October 2026
Profitability analytics for ecommerce answers a question a sales report cannot: after every cost, what did this order, this product and this channel actually earn? Revenue says how busy you are. Profit says whether it was worth it.
What goes into the calculation
True profit per order is the sale price minus every cost that belongs to it:
- Cost of goods, the product cost from your supplier
- Marketplace fees, which differ by channel and often by category
- Fulfilment and shipping, whether you ship or the marketplace does
- Advertising spend behind that particular sale
- Refunds and returns, charged back to the product returned
- Tax, including VAT, where it affects your margin
Why the answer is different on every channel
The same product sold at the same price can produce a very different profit on Amazon, eBay and your own Shopify store, because fees, shipping and advertising all change. Profitability analytics puts those results next to each other so the comparison is fair.
What to look for in a tool
- Profit down to the order and SKU, not just a channel total
- Fees pulled from the actual order, not a flat estimate
- Cost of goods that can be loaded in bulk or taken from your inventory system
- Ad spend matched to the sales it drove
- A view that updates as orders arrive rather than at month end
- Every channel you sell on, so nothing is left out
Common mistakes
- Using price minus cost of goods as margin, which leaves out every other cost
- Averaging fees instead of using the real figure for each order
- Treating ad spend as an overhead, so no product ever looks responsible for it
- Ignoring returns until a quarterly review
A quick example by channel
The same £24.99 product can earn very differently depending on where it sells. On a marketplace it carries a referral fee of around 15%, a fulfilment cost and perhaps ads. On your own store the referral fee disappears, but payment processing and shipping remain. Profitability analytics shows each result next to the other, using the real costs on each order.
What is the difference between gross and net profit in ecommerce?
Gross profit is sales minus cost of goods. Net profit also removes fees, shipping, advertising, refunds and other operating costs. Net is the figure that reaches your bank.
How do I get cost of goods into the system?
Most tools let you upload a spreadsheet of SKUs and costs, or pull costs from an inventory system such as Linnworks. Load them once and keep them updated when supplier prices change.
How often should I look at profitability?
Check headline profit daily if you can, and review product and channel profit weekly. Large changes deserve a same-day look.
The worked example in /insights/how-to-calculate-true-ecommerce-profit-margin shows how a £24.99 sale ends up at £5.04 once all costs are counted. You can see how WhatSales does this at /profitability.