Free Seller Profit Tracker

Log each sale and the tracker works out the platform’s fees and your profit, with totals by month, platform and item, your unsold stock and tax-time totals. It runs in your browser: nothing you type is sent to us.

Fees from our calculators, checked 7 October 2026 on each platform’s own pages. No sign-up and no ads.

Profit tracker

Where you sell
eBay and some others charge their fee on the tax too.

Off: your log lasts until you close this page. Nothing is sent to us either way.

Log a sale

Your unsold stock

Tax-time totals

Plain totals from your log, grouped the way each form asks for figures. Not tax advice: whether a cost counts, and what you owe, is for you or your tax adviser to decide.

Import and export

Removes every sale and item from this page and from this device.

How does the profit tracker work?

Type a sale as you make it: the date, the platform, the item, what the buyer paid and what the item and postage cost you. The tracker works out the platform’s fees with the same rules as our calculators, for the day of the sale, so a fee change is applied from its own date. Your profit is what the buyer paid, less the fees, the postage you paid and what the item cost you.

Where a platform sells the buyer the postage label (Poshmark, Vinted, StockX and GOAT), the postage is not your money, so the tracker leaves it out of your profit, as the calculators do.

What do the totals show?

Your sales, fees and profit for every month and every platform, and for each item. Items with the same name, in any mix of capital letters, are added together, so a line you sell again and again shows as one row. The best and worst items show where your profit really comes from, and where an item cost more than it made.

Why keep a list of unsold stock?

Money tied up in stock is money you cannot spend. Add what you buy, with its cost and the date, and the tracker counts the days each item has waited. When it sells, pick it from “From your stock” in the sale form: its name and cost fill in, and it leaves your stock.

Where is my log kept?

Only in this browser. With “keep my log on this device” switched off, the log lasts until you close the page. Switched on, it is saved in your browser’s own storage (IndexedDB) on this device. We never see it, and nothing is sent to us. To use the log on another device, download a backup file here and restore it there. Read more in our privacy policy.

How do I import sales from a CSV file?

The quickest way is our template: one row per sale with the date, platform, item, sale price, postage charged, item cost and postage cost. Any other CSV works too, such as a marketplace’s sales report: choose the file, check which of its columns holds each figure, and import. Dates are read month first in the US and day first in the UK; amounts can include $ or £ signs and commas.

What do the tax-time totals add up?

For the period you choose, the US Schedule C style totals are gross receipts (what buyers paid you, not sales tax), fees, shipping and the cost of goods sold. The UK self-employment style totals are turnover and expenses (fees, postage and the cost of the items you sold). They are sums of your own log, nothing more: they are not tax advice, and they leave out costs the tracker does not know, such as packaging or mileage.

Want the fees on one sale before you list? Use the seller fee calculator to compare every platform side by side.

Profit tracker questions

Is my sales log sent to you?

No. The tracker runs in your browser and nothing you type is sent to us or to anyone else. If you switch on “keep my log on this device”, it is saved in your browser’s own storage on this device only. Use the backup file to move it to another device.

How are the fees worked out?

With the same rules as our calculators, read on each platform’s own pages (last checked 7 October 2026), for the day of each sale. The tracker uses each platform’s standard options, such as eBay’s most common category rate; open a platform’s calculator for its categories and extras.

Can I import my sales from a spreadsheet or a marketplace report?

Yes. Download our CSV template, or import any CSV file and match its columns to ours in the column mapper. Rows the tracker cannot read are listed, with the reason, and left out.

What are the tax-time totals?

Plain totals from your log for a calendar year or a UK tax year (6 April to 5 April): what buyers paid you, platform fees, postage and the cost of the items you sold. They are grouped the way a US Schedule C and UK self-employment return ask for figures. They are not tax advice; check with a tax adviser before you file.

What happens if I clear my browser?

Clearing your browser’s site data deletes the saved log. Download a backup file now and then, and restore it if that happens. “Delete everything” removes the log on purpose.

Does the tracker cost anything?

No. It is free, with no sign-up and no ads on this page.