Mercari Seller Fees: Calculate Proceeds and Your Minimum Price

Keep seller proceeds and buyer cost separate

The buyer's 3.6% Buyer Protection fee uses item price plus buyer-paid shipping too. There is no additional buyer payment-processing fee in the current structure. Official buyer and seller fee details.

For the worked $20 item and $5 label, with no buyer tax or other charges:

The two fees belong to different parties. Adding the $0.90 to the seller deduction understates seller earnings. Adding it to seller revenue overstates them.

Complete the contribution worksheet

Assume the product cost $6 and packaging costs $0.50. The illustrative buyer-funded label exactly matches the $5 shipping charge.

Contribution = $20 − $2.50 − $6 − $0.50 = $11.00.

The gross method reaches the same answer:

$25 − $2.50 − $5 label − $6 − $0.50 = $11.00.

Use either method consistently. The second method makes the shipping collection and expense visible. The first starts from item earnings and treats matching label funds as a pass-through. Neither includes uncounted labor, overhead, return costs or income taxes.

For seller-paid shipping, subtract the actual label from the item earnings. If a label adjustment or seller-funded shipping discount applies, add that actual cost even if the original label was buyer-funded.

Set an offer floor before negotiating

Let P be item price, S buyer-paid shipping, C your product, packaging and other seller costs, and G the desired contribution after those costs. For buyer-funded prepaid shipping that exactly covers the label:

Contribution = 0.90P − 0.10S − C.

Rearranging gives:

Minimum item price = (C + G + 0.10S) ÷ 0.90.

In a worked example, product and packaging cost $4.50, buyer-paid shipping is $6, and the target contribution is $10. The result is:

($4.50 + $10 + $0.60) ÷ 0.90 = $16.78, rounded up.

At $16.78, the seller fee on $22.78 rounds to $2.28. Item proceeds are $14.50, and subtracting $4.50 leaves exactly $10.00. Your chosen target is a business input, not a market guarantee.

Test free shipping separately

With free shipping, set buyer-paid shipping to zero and put the full label cost inside C. For the same $4.50 product-and-packaging cost, $6 label and $10 target, the required price is:

($4.50 + $6 + $10) ÷ 0.90 = $22.78, rounded up.

This equals the earlier $16.78 item plus $6 charged shipping. The buyer's pre-tax commercial amount is unchanged, so the illustration produces the same contribution.

Compare your estimate with the completed order

Save agreed price, shipping arrangement, seller fee, label amount and adjustments. Reconcile those with your order record before interpreting the available balance or cash withdrawal as profit.

Open the Mercari calculator. Check the displayed fee against 10% of the combined item and charged-shipping amount. If you are updating an older spreadsheet, the fee-change guide explains why historical fee formulas should not be applied to current orders.