10 Metrics Every eBay Seller Should Track (With Formulas)
Quick answer
The ten most useful metrics for an eBay business are net profit, net profit margin, average profit per order, effective eBay fee rate, ad cost of sales, shipping cost as a percentage of revenue, sell-through rate, average days to sell, return rate, and profit per hour. Together they show whether you're profitable, where money leaks, and where to focus your time. Review them monthly and compare with the previous month.
Key takeaways
- Sales alone tell you very little; profit metrics tell you whether the business works.
- Effective fee rate and ad cost of sales show how much eBay and promotion really cost you.
- Speed metrics (sell-through and days to sell) show how fast inventory turns into cash.
- Return rate and profit per hour reveal hidden costs in time and money.
- A monthly review of these ten numbers takes minutes with automated tracking.
Seller Hub is full of numbers: views, impressions, click-through rates, traffic sources. They're useful for listing optimization, but they don't tell you whether your business is healthy. These ten metrics do. Each one comes with a formula and a note on what to watch.
1. Net profit
The bottom line. Track it monthly and compare month over month and year over year. See calculating eBay profit.
2. Net profit margin
Shows how much of every dollar you keep. A falling margin with rising sales often means you're buying worse, discounting more, or promoting too heavily. Benchmarks in what is a good eBay margin.
3. Average profit per order
Low profit per order means fixed costs and returns hit harder. If it's only a few dollars, consider raising your minimum item value or bundling.
4. Effective eBay fee rate
Your real eBay commission, including tax in the fee base, international fees, and surcharges. If it rises without a change in categories, investigate. See eBay fees explained.
5. Ad cost of sales
Tells you how much of your revenue goes to ads. Watch it alongside net margin — see are promoted listings worth it.
6. Shipping cost as a percentage of revenue
Rising shipping percentage usually means outdated shipping templates, oversized boxes, or carrier rate increases. See reduce shipping costs.
7. Sell-through rate
How fast your inventory converts to cash. Covered in depth in sell-through rate explained.
8. Average days to sell
Shows how long cash is tied up in each item. Rising days to sell is an early warning of overpricing or saturated categories.
9. Return rate
Track it by category. High rates erode profit through lost shipping and time — see how returns affect profit.
10. Profit per hour
The metric most sellers ignore. Log hours spent sourcing, listing, packing, and on admin for a month. If profit per hour is low, delegate (see hiring a VA) or shift toward higher-value items.
How often should you review these metrics?
| Metric | Review |
|---|---|
| Net profit, margin, profit per order | Weekly glance, monthly review |
| Fee rate, ad cost, shipping % | Monthly |
| Sell-through, days to sell | Monthly |
| Return rate | Monthly, by category |
| Profit per hour | Quarterly |
How can you track these metrics automatically?
Most of these numbers require combining eBay data (sales, fees, ads, refunds) with your own data (item cost, hours). MyOrderProfit handles the eBay side automatically — orders and fees sync every 10 minutes — and calculates net profit and margin per order, per day, and per month. Advanced reports break down eBay fees and trends, sales by product and buyer, and monthly and yearly P&L, with CSV export and automated weekly email summaries. Start with a 14-day free trial, no credit card required.
Frequently asked questions
What metrics should eBay sellers track?
Net profit, net margin, average profit per order, effective eBay fee rate, ad cost of sales, shipping as a percentage of revenue, sell-through rate, average days to sell, return rate, and profit per hour.
What is an effective eBay fee rate?
It is the total of final value fees, per-order fees, and other eBay fees divided by revenue. It shows what eBay actually costs you, including tax in the fee base and surcharges.
How often should I review my eBay business metrics?
Glance at profit weekly, review fees, shipping, sell-through, and returns monthly, and calculate profit per hour quarterly.