The fee base is more than the item price
eBay defines the amount of the sale as the item price plus the shipping collected, some exceptions aside, and charges the final value fee on that whole amount. Enter the price and the shipping you charge the buyer together, because the page adds them before it applies any percentage.
That is why “free shipping” is not free: the postage still sits inside the base, so the fee is charged on it either way. Folding shipping into the item price leaves the base unchanged and only moves what the buyer sees on the listing.
Leaving the shipping field at zero when you do charge postage is the quiet error - the fee comes out low and the proceeds come out high. If the base is zero, the page stops with a prompt instead of printing a negative payout.
The category picks the percentage and the tiers
eBay prices the final value fee from a category table rather than a single rate. Most categories charge 13.6% on the first $7,500 of the sale and 2.35% above it; books, movies and music run 15.3% to the same hinge; coins and select collectibles sit at 13.25%.
The exceptions are where a listing can be priced badly by assumption: bullion drops to 7% above $7,500, handbags step from 15% to 9% above $2,000, jewelry and watches from 15% to 9% above $5,000, and watches alone have three brackets - 15%, then 6.5%, then 3%. NFTs are a flat 5%, select business and industrial listings 3% to $15,000 and 0.5% above, and guitars 6.7% to $7,500.
Each bracket applies only to the part of the sale inside it, so a $1,000 watch pays 15% on that first $1,000 while a $9,000 watch pays 15%, 6.5% and 3% on three separate slices. The category selector carries all twelve rows, and the row used is named under the answer.
A per-order fee rides on top
Every order pays a fixed fee on top of the final value fee: $0.30 when the amount collected is $10 or less, $0.40 above it. It is charged once per order, so a multi-quantity sale in this model is still one order and one fee.
Athletic shoes are the exception the page itself makes: at $150 or more the per-order fee is not charged, and the same threshold moves the category rate from 13.6% to 8%. A $200 pair therefore pays 8% and no fixed cents, which can leave more in hand than an item of the same price in a category at 13.6%.
Fixed cents hurt small orders most. On a $5 sale the $0.30 fee is six percent of the entire amount before the percentage fee has even been applied, and no category choice fixes that.
Insertion fees only beyond the free allowance
Most categories give 250 free listings a month before the $0.35 insertion fee begins. The page counts only the listings past that allowance, so a seller inside it enters 0 and sees no insertion line at all; the fee is multiplied by the listing count rather than assumed once per sale.
The table carries the exceptions with their own insertion figures: select business and industrial categories charge $20 per listing, guitars and athletic shoes charge nothing, and the per-listing rate used is printed in the fee row when an insertion fee applies.
Not modelled, and named as such: optional listing upgrades, the Below Standard surcharge that adds 7% to applicable final value fees after four consecutive months, sales tax, and store subscription fees. A refunded sale can earn fee credits, but that is the refund side of the ledger, handled by the refund calculator in this family.
Pricing backwards from the money you want to keep
Most sellers price forward and find out what the fee costs afterwards. Run the same arithmetic backwards instead. On a most-categories sale the fee is 13.6% of the amount collected plus $0.40, so collecting $46.75 leaves you about $40. That $46.75 is the amount collected, not the item price: postage sits inside the fee base, so a “free shipping” listing that keeps $8 of postage in the price pays the fee on the postage too - the fee follows the money the buyer sends, not the label on the listing.
The mark-up question then gets honest. Buy at $20, sell at $45 with $8 of shipping collected, and the fee line takes $7.60: your gross margin is $25 and the fee is nearly a third of it before any packaging, fuel or returns. Sell three a week and the arithmetic repeats per item - the percentage does not shrink with volume, and it does not notice that your cost of goods went up. The only levers are the amount collected, the category and the decision not to make the sale.
That is also why the page prints the fee as a share of the sale next to the money. A seller who knows the share is 14.3% can price a whole catalog in one pass, and a seller who only knows the dollar amount has to redo the sum for every item at every price.
Danfio