How to Do Profitability Analysis in E-Commerce?
Profitability analysis means calculating, per product, what remains in your hands after commission, shipping, returns, packaging and advertising costs are deducted from each order. When profit erodes while revenue grows, the cause is almost always that this calculation has not been done.
Revenue misleads, profit does not
The most common trap in e-commerce is treating revenue as a measure of success. Net profit can fall while revenue rises, and in practice this is common: advertising spend has increased, the return rate has gone up, or a campaign discount has eaten the margin.
The right question is not how much you sold this month, but how much you earned from each product. These two often point to different products.
Most commonly forgotten cost items
Commission and shipping are usually included. The ones that get forgotten are: round-trip shipping and resaleability loss on returned products, packaging materials, payment and maturity differences, storage, and allocating advertising spend to products.
Each of these items looks small on its own, but together they create a burden expressed in tens of percent in most categories. If they are left out, a product thought to be profitable may actually be losing money.
How to do it step by step?
1. Drill down to product level
Total profit is misleading; a few strong products can hide dozens of loss-making ones. Do the calculation separately for each product.
2. List all cost items
Supply, commission, shipping, return allowance, packaging, payment cost, storage and advertising. A missing item means a wrong result.
3. Convert the return rate into cost
Add your category's return rate to product cost as a percentage. In apparel this item is often bigger than commission.
4. Allocate advertising to products
Allocate total advertising spend to the products that were advertised, not to revenue. Otherwise, unadvertised products unfairly look unprofitable.
5. Sort results into three groups
Profitable, marginal and loss-making. One of the decisions (price, cost or delisting) should be applied to the loss-making group.
6. Repeat monthly
Commission rates, shipping tariffs and advertising costs change. An analysis done once becomes invalid after three months.
Items in the net profit calculation
| Item | How it is calculated | Common mistake |
|---|---|---|
| Sale price | Amount paid by the customer | Forgetting the campaign discount |
| Commission | Category rate × selling price | Skipping category-specific differences |
| Shipping | Negotiated tariff, based on volumetric weight (desi) | Assuming free shipping costs nothing |
| Returns | Return rate × unit loss | Ignoring it entirely |
| Advertising | Spend allocated to products | Pro-rating against revenue and moving on |
| Packaging | Unit packaging material cost | Skipping it because it seems small |
Common mistakes
1. Settling for looking at total profit. A few strong products hide the loss-makers.
2. Thinking free shipping is free. The shipping cost comes out of your pocket; it needs to be built into the price.
3. Not counting returns as a cost. Especially for apparel and breakable products, it is the biggest hidden item.
4. Pro-rating advertising against revenue. It unfairly shows unadvertised products as unprofitable and distorts decisions.
Limitations: what does it not cover?
Applying these with awareness lets you set realistic expectations:
The calculation is only as accurate as the data you enter. An incorrectly entered supply cost or shipping tariff produces an incorrect net profit.
Competitors' profitability cannot be known. Other stores' cost structures are closed to outsiders; costs cannot be inferred from a competitor's price.
It does not replace accounting. Tax filing and official records are a separate area; this analysis is for operational decisions.
Requires historical data. For new products, return rate and advertising efficiency are unknown, so the calculation is an estimate.
Frequently asked questions
What is profitability analysis in e-commerce?
It is calculating, per product, the net amount left after commission, shipping, returns, packaging and advertising costs are deducted from each order.
Why does profit fall while revenue rises?
Usually because advertising spend has increased, the return rate has risen, or campaign discounts have eaten into the margin.
Which cost item is forgotten the most?
Returns. Especially for apparel and breakable products, the return cost is often larger than commission.
How should I allocate advertising costs?
Allocate it to the products that were advertised, rather than as a share of total revenue. Otherwise, unadvertised products unfairly look unprofitable.
How often should I repeat the analysis?
Once a month. Commission rates, shipping tariffs and advertising costs change, so an old analysis becomes outdated quickly.
Doing it with the tool
ProfitPulse calculates product-level net profit after commission, shipping and advertising, and generates alerts for loss-making products. The accuracy of the calculation depends on the cost data you enter.
For a quick estimate, you can use the and profit margin calculator and Trendyol commission calculator tools.
Last updated: September 10, 2026