Resale Profit Calculator

How to use the resale profit calculator

1. Pick a symbol in Currency. It changes the label only; nothing is converted.
2. Choose a Marketplace preset or keep "Custom — enter your own fee". A preset fills Marketplace fee and Fixed fee per order; the note under the form names its source and date.
3. Fill in Sale price, Purchase cost, Shipping you pay and Packaging, cleaning, other.

If no preset matches your account or category, choose Custom and overwrite both fee fields: switching back does not clear them.

Inputs explained: buy price, sale price, fees, shipping, extras

What belongs in purchase cost is settled in COGS for resellers; costs that never appear on the sale screen are in hidden costs of reselling.

Buyer-paid fees vs seller costs

Only fees deducted from you go in the fee fields. Here is what the official pages stated on 13 September 2026:

eBay UK says its Buyer Protection fee is included in the item price buyers see when browsing, so don't copy the price from the buyer's view of your listing; enter the price you set.

Example: an 80 zł jacket sells on Vinted Poland for 200 zł, with 6 zł of extras; the right answer is 114 zł. Typing 212.90 zł (price plus the usual 5% + 2.90 zł) as the sale price shows 126.90 zł; typing 5% + 2.90 as your fee shows 101.10 zł.

eBay UK business and eBay.pl fees apply to the total sale, which both fee pages say includes postage; the calculator uses Sale price only. Enter item price plus buyer-paid postage there, and the label cost as shipping. Every marketplace's fee on one price is in the marketplace fee calculator.

Reading the results: profit, margin, ROI

The calculator runs exactly this:

ROI divides by purchase cost only, so extras lower profit but do not count as investment. A purchase cost of 0 shows "—".

If net profit is negative at the price you expect, change the price or the marketplace. The break-even price calculator finds your lowest acceptable offer; the reselling ROI calculator adds holding time for slow items.

Worked example in zł

The 15.80 zł gap is the commission. Keeping 114 zł on Allegro Lokalnie takes a 217.16 zł price (200 ÷ 0.921); the Vinted buyer pays about 212.90 zł plus delivery.

• Sale price is the price you set, not the checkout total
• Fee fields hold only what is deducted from you
• On eBay UK business or eBay.pl, buyer-paid postage is inside the sale price

Limits of the calculation

• Small orders. eBay UK business charges £0.30 at £10 or less and eBay.pl 0.25 zł under 50 zł; edit the fixed fee.
• Missing fees. The eBay.pl preset omits the regulatory operating fee, which two official eBay.pl pages state differently (0.43% and 0.35% + VAT). eBay UK shows business fees excluding VAT and doesn't say there what is added; check your invoice. Returns, promotions and currency conversion are not included.
• Monthly costs belong in the gross vs net profit section of the resale profit guide; to log each sale and profit per marketplace, use the reseller inventory and profit tracker.
• Tax. Results are before income tax. This is not tax advice; ask a tax adviser.

More worked examples per marketplace are in the complete resale profit guide.