Record what you put in
Keep your inventory and purchase costs with the item they belong to.
The reseller’s working ledger
MothMargin
Know what every resale item actually earns.
An easy-to-use, editable spreadsheet for inventory, purchase costs, marketplace fees, sales, and true profit—all in one place.
A private, editable ledger for the resale workflow you already have.
One item. The whole picture.
THE MARGIN, MADE VISIBLE
| The item | Purchase cost | Marketplace fees | Sale | True profit |
|---|---|---|---|---|
| Track each resale item | What went in | What the sale cost | What came back | What you actually earned |
One fictional resale item
See the profit behind one sale.
This fictional Canvas chore jacket uses the workbook’s eBay preset. The fee preset is editable; check it against your actual fees. The 13% rate and $0.30 fixed amount are illustrative placeholders, not source-verified marketplace terms. The applicable region and source date were not supplied.
- Item
- Canvas chore jacket
- Purchase cost ($)
- $18.00
- Marketplace
- eBay
- Fee rate
- 13%
- Fixed fee ($)
- $0.30
- Manual fee override ($)
- — (blank)
- Sale price ($)
- $50.00
- Marketplace fees ($)
- $6.80
- True profit ($)
- $25.20
Marketplace fees
$50.00 × 13% + $0.30 = $6.80
The blank manual override leaves the fee preset in use.
Workbook order: ROUND(ROUND(sale price × fee rate, 2) + fixed fee, 2).
True profit
$50.00 − $18.00 − $6.80 = $25.20
Sale price minus the tracked purchase cost and marketplace fees; other costs aren’t included unless entered in those fields.
Inside the spreadsheet
A closer look at the resale math.
Review the same three fictional resale rows shown in the free sample workbook. Poshmark’s percentage and fixed-fee inputs are blank because its fee-source research, applicable region, and source date were not supplied. Its automatic fee and true-profit results stay blank until both editable inputs are completed. Depop remains an editable provisional 0% + $0.00 placeholder with no verified seller-paid component; its region and source date were not supplied. eBay’s 13% + $0.30 is an editable placeholder without supplied region or source-date research.
| Item | Purchase cost ($) | Marketplace | Fee rate | Fixed fee ($) | Manual fee override ($) | Marketplace fees ($) | Sale price ($) | True profit ($) |
|---|---|---|---|---|---|---|---|---|
| Vintage wool coat | $22.00 | eBay | 13% | $0.30 | — | $8.62 | $64.00 | $33.38 |
| Ceramic planter | $12.50 | Etsy | 10% | $0.25 | — | $4.05 | $38.00 | $21.45 |
| Denim jacket | $18.00 | Depop | 0% | $0.00 | — | $0.00 | $52.00 | $34.00 |
The full nine-column layout, including the blank manual override and calculated fees.
| Item | Sale price ($) | Purchase cost ($) | Marketplace fees ($) | True profit ($) |
|---|---|---|---|---|
| Vintage wool coat | $64.00 | $22.00 | $8.62 | $33.38 |
| Ceramic planter | $38.00 | $12.50 | $4.05 | $21.45 |
| Denim jacket | $52.00 | $18.00 | $0.00 | $34.00 |
Compare each sale with its purchase cost and marketplace fees to see true profit.
These rows are fictional. Poshmark’s percentage and fixed-fee preset inputs are blank because its source research, applicable region, and source date were not supplied; its automatic fee and true-profit results stay blank until both inputs are completed. Depop is an editable provisional 0% + $0.00 placeholder; no seller-paid component is verified, and its applicable region and source date were not supplied. Etsy remains an illustrative estimate. The eBay 13% + $0.30 preset is an editable illustrative placeholder, not source-verified; its applicable region and source date were not supplied. Check your current fees and update the preset inputs before relying on any values.
Complete editable workbook
Inventory, purchase costs, marketplace fees, sales, and true profit—all together in one editable sheet.
$29one-time
A note from the maker
Help make MothMargin clearer
Tried the sample or bought the workbook? Tell us what made sense and what could be improved. No account needed.
The useful number is the one left
A sale price isn’t the whole story.
MothMargin keeps the moving parts of a resale together, so you can look past the sale total and see what each item earns after its costs.
Count the costs of selling
Add the marketplace fees and sale details that change the final number.
See what’s worth listing again
Use true profit to spot what is selling and decide what fits your next listing.
Keep the workflow light
Start with a sheet. Learn what your shop needs.
Keep your inventory, purchase costs, marketplace fees, sale prices, and true profit together in one working sheet built for independent resellers.
Start with the number that matters: what each sold item actually earns.
Make the next listing count
Ready to see what each item keeps?
Create your private ledger and keep the economics of every resale item in view.
Start your ledger Free to start. Built to stay clear.