Reseller Profit Calculator
Paid one price for a box or bundle? Spread it over the items, add fees and postage, and see profit for each item and for the lot.
Free · runs in your browser · nothing is uploaded
How to use the reseller profit calculator
- Type the total you paid in “What you paid for the whole lot”.
- In the first row, name the item under “Item”. The page starts with three sample rows you can overwrite.
- Enter the price you expect it to sell for under “Expected sale price”.
- Choose the marketplace under “Sold on”. The fee rules follow that choice.
- Enter what you will pay to post it under “Your postage”. It starts at 5 and is ignored for Poshmark rows.
- Press “Add an item” for each further item and repeat steps 2 to 5. The × button on a row removes it.
- Read the table: “Share of lot cost”, “You keep (after platform fees)” and “Profit” for every item. Rows that lose money are highlighted.
- Read “Profit if everything sells” under the table, then the line below it that says how many of your best-earning items cover the lot, or that the lot does not pay back.
You keep is the sale price less platform fees. Postage comes off in the Profit column, except for Poshmark rows, where the buyer’s flat shipping pays the label so nothing is taken off. The page assumes you charge no shipping to the buyer. This page does not save your rows or make a shareable link, and it has no CSV or ledger button, so note the figures down before you leave.
How do I split the cost of a lot between items?
The tool divides the lot price in proportion to each item’s expected sale price, so an item expected to sell for $40 carries more of the cost than one expected to sell for $10. Cents are handed out by largest remainder, so the shares always add up to exactly what you paid.
Take a $60.00 lot of three items, each with $5.00 postage:
| Item | Expected sale price | Sold on | Share of lot cost | You keep | Profit |
|---|---|---|---|---|---|
| Item 1 | $40.00 | eBay (US) | $30.00 | $34.16 | −$0.84 |
| Item 2 | $25.00 | Poshmark | $18.75 | $20.00 | $1.25 |
| Item 3 | $15.00 | Mercari | $11.25 | $13.50 | −$2.75 |
The result is “Profit if everything sells” of −$2.34. The three items leave $57.66 after fees and postage, short of $60.00, so the page says the lot does not pay back its cost. The Poshmark row has no postage taken off, which is why Item 2 shows $1.25 even though its $5.00 postage field is filled in. Fees take $5.84 from the eBay sale (13.6% plus $0.40), $5.00 from the Poshmark sale (20%) and $1.50 from Mercari (10%).
How much profit does a lot make at a lower price?
Paying $30.00 for the same three items changes the shares to $15.00, $9.38 and $5.62. The profit rows become $14.16, $10.62 and $2.88, and the total is $27.66. The break-even line then reads that selling the 2 best-earning items covers the lot, because the first item leaves $29.16 after postage and the second brings the running total to $49.16, past $30.00.
At $45.00 the shares are $22.50, $14.06 and $8.44, the total is $12.66, and it still takes the 2 best-earning items to get the money back ($49.16 against $45.00). Try your own numbers before you bid on a lot.
How do I work out the margin on a flip?
The table does not show a margin column. Divide an item’s Profit by its Expected sale price and multiply by 100. Item 1 in the $30.00 lot makes $14.16 on a $40.00 sale, which is 35.4%. Markup divides by cost instead, so the same sale shows a bigger number, 94.4% on the $15.00 share.
What is the break-even point on a lot?
The break-even line lists the items by what they leave after fees and postage, best first, and counts how many it takes for that running total to reach the lot price. It does not give one break-even price. If even all items together fall short, the line tells you the lot does not pay back its cost.
How this tool works and where the numbers come from
The price you paid for the lot is divided across the items in proportion to their expected sale price, using largest-remainder rounding so the shares add up to exactly what you paid. Each item then goes through the fee engine of the platform you pick, minus its share of the lot and your postage. The break-even line counts how many of the best-earning items repay the lot.
Sources
- eBay US: selling fees (final value fees, per-order fee, insertion fees) (no date shown on the page) · checked
- Poshmark: what are the fees for selling (no date shown on the page) · checked
- Mercari US: fees on Mercari (Updated 10/23/2026) · checked
- Etsy: Etsy fee basics (listing and transaction fees) (no date shown on the page) · checked
- Depop: seller fees and charges (updated 2026-07-21) · checked
- Whatnot: seller fees (commission tiers, payment processing) (October 1, 2026) · checked
- Grailed: what are the fees (updated 2026-09-22) · checked
- Facebook Marketplace: selling with shipping and checkout (no date shown on the page) · checked
- TikTok Shop US: referral fee updates (no date shown on the page) · checked
Frequently asked questions
How do I calculate profit on one flip?
Take the sale price, subtract the platform fees, your postage and the item’s cost. In this tool, enter the item’s expected sale price, pick the platform and the postage, and read the Profit column. For a single item bought alone, put its price as the lot price and use one row.
Why does the calculator share the lot cost by expected price?
You usually cannot say what each item cost when you bought them together. Weighting by expected sale price gives each item a fair share, and it keeps the shares equal to your total. If you know an item’s real cost, enter that as a lot of one.
Does it include the fees of each platform?
Yes, using the default options for the platform in “Sold on”: no Store, standard seller, no ads. The fee pages for each platform list the official sources, and the rate changelog shows when rates were last checked.
What happens if I sell on different platforms?
Each row has its own “Sold on” choice, so one lot can be spread over several platforms. The total adds the profit of every row.
Does it include returns, ads or sales tax?
No. It does not model returns, promoted listings or income tax. Subtract those yourself from the totals if they apply to you.
How much do resellers make?
This page quotes no average. Use the income calculator with your own sales pace instead.
Related tools
- Selling Price Calculator: to find the price each item needs before you add it here.
- Sell-Through Rate Calculator: to see how quickly a lot’s items are likely to move.
- Reseller Income Calculator: to turn per-lot profit into weekly and yearly figures.
- eBay Profit Calculator: to work one eBay sale through with your own costs.
- Poshmark Fee Calculator: to check the 20% fee on one order.
- Mercari Fee Calculator: to check the 10% fee on one order.
- Etsy Fee Calculator: for Etsy’s listing, transaction and processing fees. The term ‘Etsy’ is a trademark of Etsy, Inc. This Application uses Etsy’s API, but is not endorsed or certified by Etsy.
- Reselling Spreadsheet: to keep a record of what each item finally sold for.