You paid $8 for a wool jacket at a thrift store and sold it on eBay for $40 plus $8 shipping. After fees and postage you cleared $23.62. A friend says that's a 295% return. Another says it's a 49% margin. They're both right, and if you mix the two up you'll price your next buy wrong.
So what's a good profit margin for reselling? Before you can answer that, you need to know which number you're looking at. Profit margin and ROI use the same profit but divide by different things, and each one answers a different question about your business.
The two formulas
Both start with profit: what you keep after every cost.
Profit = Sale total − Marketplace fees − Shipping paid − Supplies − Item cost
Then they split:
Profit margin = Profit ÷ Sale total
ROI = Profit ÷ Item cost
| Metric | Denominator | Question it answers |
|---|---|---|
| Profit margin | What the buyer paid (item + shipping collected) | How much of each sale dollar do I keep? |
| ROI | What you paid for the item | How hard did my sourcing money work? |
With positive costs, margin stays below 100%; an estimate with no costs at all can reach 100%. For positive sale revenue and nonnegative costs, it cannot exceed 100%. Acquisition ROI has no ceiling, but is unavailable when acquisition cost is $0, not infinite. A $2 find that nets $30 is a 1,500% ROI. That's why ROI numbers from cheap thrift finds look huge and margin numbers look modest, even on the same sale.
Define your denominator once and stick with it. In this post, "sale total" means item price plus shipping the buyer paid, not including sales tax, since the marketplace collects and remits the tax.
The free calculators use that sale-revenue denominator. Upcyclist's recorded-sales dashboard instead divides profit by net revenue after buyer sales tax and platform fees. The same profit can therefore show a different margin percentage in the app. Compare like denominators; this guide does not change the app's recorded-sale calculations.
Worked example: the thrift jacket
These are hypothetical domestic US sales in USD, using ordinary No Store/Starter clothing and Home & Garden presets from us-domestic-2026-10-07, reviewed October 7, 2026 and rechecked October 9 against eBay's official selling fees. Both use 13.6% of the fee base plus $0.40 per order over $10. The 7% buyer-tax assumption applies to item price plus shipping collected; it is not a universal tax rate. Advertising, additional charges and overhead are $0; time, returns and income tax are not modeled.
- Item price: $40.00, shipping collected: $8.00 → sale total $48.00
- Sales tax (7% example rate): $3.36, so eBay's fee base is $51.36
- Final value fee: 13.6% × $51.36 + $0.40 = $7.38
- Postage paid: $8.00. Poly mailer and tape: $1.00. Item cost: $8.00
Profit = $48.00 − $7.38 − $8.00 − $1.00 − $8.00 = $23.62
- Profit margin = $23.62 ÷ $48.00 = 49.21%
- ROI = $23.62 ÷ $8.00 = 295.25%
Notice the fee is charged on the tax too. Many new sellers calculate 13.6% of the item price only and overstate their profit by a dollar or more per sale.
Check your own category, shipping and buyer-tax assumptions with Upcyclist's eBay calculator described below. Enter acquisition, postage and other costs to see profit, sale-revenue margin and acquisition ROI; its category presets cover selected US transactions, not every sale.
When you already know the actual marketplace fees, the general reseller profit calculator described below separates seller revenue, fees, postage, other costs and acquisition before showing profit, margin and ROI. Use seller shipping receipts, not buyer-label pass-through amounts. Blank required costs are not assumed to be zero; $0 acquisition makes acquisition ROI unavailable.
Worked example: the expensive buy
Now a higher-cost item: a $70 espresso machine from an estate sale, listed at $120 with free shipping.
- Sale total: $120.00 (free shipping)
- Sales tax (7%): $8.40, fee base $128.40
- Final value fee: 13.6% × $128.40 + $0.40 = $17.86
- Postage: $12.00. Box and padding: $2.00. Item cost: $70.00
Profit = $120.00 − $17.86 − $12.00 − $2.00 − $70.00 = $18.14
- Profit margin = 15.1%
- ROI = 25.9%
The jacket and the espresso machine both made money. But the machine tied up nine times the cash for less profit, and its thin margin means one return or damage claim wipes it out. Seeing both numbers side by side is what tells you that.
When to use margin, and when to use ROI
Use ROI when you're deciding what to buy. Your sourcing cash is limited. ROI tells you which purchase makes your money grow fastest. A shelf of $2 books at 300% ROI can beat one $70 appliance at 26%.
Use margin when you're setting a price. Margin tells you how much cushion each sale has against fees, shipping surprises, returns and offers. A low-margin item has almost no room to accept a lowball offer.
Watch both when cost is high. High-cost items often show acceptable margin and weak ROI, or the reverse if you bought a deal. The risky zone is where both are low.
What's a good profit margin for reselling?
There is no universal right answer, and anyone quoting one ideal number is guessing about your costs. Your floor depends on:
- Your fee rate. eBay's most-category rate is 13.6%, but books, jewelry and handbags are charged differently. Other marketplaces use different structures entirely.
- Shipping. Heavy or bulky items eat margin fast, especially with free shipping.
- Time. An item that takes an hour to clean, photograph and list needs more margin than one you list in five minutes.
- Return risk. Electronics and sized clothing get returned more than decor.
A practical way to set your own floor: pick the lowest dollar profit you'll accept for an hour of work, then work backward to the margin that gets you there on your typical sale size. Revisit it once you have a few months of sold items to look at.
Set a target price from a margin goal
If you know your cost and want a specific margin, the formula is:
Target price = Cost ÷ (1 − Margin goal)
A $70 item at a 50% margin goal needs a $140 price. But that simple formula ignores fees and shipping. Run the $140 through eBay's fees for the espresso machine and the real margin lands near 25%, about half the goal. Always check a target price against a fee calculator before you commit to it.
Before sourcing, use What Can I Pay? to find an all-in buying limit from an expected sale and your manual fee, cost and ROI assumptions. For an eBay listing-price goal, use the eBay calculator's price-for-a-profit-goal mode.
Free calculators to check your numbers
You don't have to do this math by hand every time. These free tools calculate fees and profit before you list:
- The reseller profit calculator separates seller receipts, actual marketplace fees and costs to estimate profit, sale-revenue margin and acquisition ROI.
- The eBay fee calculator estimates supported US category fees, buyer-tax effects and profit, or works backward to a selling price for your profit goal.
Use the same shipping, cost and fee assumptions when comparing estimates. Different defaults can produce different results.
FAQ
Is ROI or profit margin more important for resellers?
Neither is more important. ROI guides buying decisions; margin guides pricing decisions. Track both.
Can profit margin be over 100%?
No, not with positive sale revenue and nonnegative costs. Margin is profit divided by seller revenue: it is below 100% with positive costs and exactly 100% with zero total modeled costs. It is unavailable at $0 revenue. Acquisition ROI can exceed 100%, but is unavailable at $0 acquisition cost.
Should shipping be included in the sale total?
If the buyer paid for shipping, yes, include it, and include your postage as a cost. Otherwise a sale with paid shipping looks less profitable than it is.
For the separate question of reporting gross payments versus taxable profit, read about reseller taxes and 1099-K.
What's the difference between markup and margin?
Markup is profit over cost before fees, similar to ROI. Margin is profit over the sale total. A 100% markup is only a 50% margin, and less after fees.
Upcyclist lets you set a margin target, and it uses cost ÷ (1 − goal) to suggest a target price for each item, highlighting items that clear your goal. The Inventory Planner shows how your stock and costs add up so you can see where your sourcing cash is tied up. Since the target formula doesn't include marketplace fees, pair it with one of the calculators above before you list.
What's next
Before setting an eBay listing price, use the eBay calculator's price-for-a-profit-goal mode. It includes supported category fees and entered expenses, and uses margin on sale revenue including buyer shipping. It estimates a cost-based target, not market value, and does not change the app's inventory target formula.
Once you know your margin and ROI, the next question is what they add up to over a month. Our guide to how much resellers make works backward from an income goal to the number of items and the margins you actually need.
