Why sellers lose money without a fee calculator
Most new marketplace sellers price by gut feel: buy for $12, sell for $25, assume $13 profit. Then the payout report arrives and the number is smaller — referral fees, final value fees, fulfillment, payment processing, and ad spend all took a slice. On Amazon, referral and FBA fulfillment fees alone commonly consume 30–40% of the sale price. On eBay, the final value fee applies to the shipping you charge the buyer, not just the item. On Etsy, three separate fees stack on every single order.
These calculators itemize every deduction like a receipt so you can price with your eyes open: know your break-even price, your true margin, and what one order actually puts in your pocket — before you list, not after.
Marketplace fees at a glance
| Marketplace | Main fee | Also charges | Payment processing |
|---|---|---|---|
| Amazon FBA | 15% referral (most) | FBA fulfillment + storage | Included |
| eBay | 13.6% FVF (most) | $0.30–$0.40 per order | Included |
| Walmart | 8–15% referral | WFS fulfillment (optional) | Included |
| Etsy | 6.5% transaction | $0.20 listing + Offsite Ads | 3% + $0.25 (US) |
Typical published rates for standard sellers; categories, regions, store subscriptions, and performance status can change your exact rate — always confirm in your seller dashboard.
How the eBay fee calculator works
eBay's final value fee (13.6% for most categories) is charged on the total sale amount — item price plus buyer-paid shipping — with a per-order fee of $0.30 on orders of $10 or less and $0.40 above that. The calculator auto-selects the right per-order tier, adds Promoted Listings ad rate if you use it, and shows your net payout, profit, and break-even item price.
How the Walmart Marketplace calculator works
Walmart Marketplace has no monthly subscription — you pay a referral fee of 8–15% by category (15% for most). Sellers using Walmart Fulfillment Services add a per-unit fulfillment fee based on size and weight; seller-fulfilled merchants enter their own shipping cost instead. The receipt shows profit, margin, ROI, and break-even.
How the Etsy fee calculator works
Every Etsy sale carries three mandatory fees: a $0.20 listing fee, a 6.5% transaction fee on item plus shipping, and a payment processing fee (3% + $0.25 in the US; 4% + £0.20 in the UK). If the order came through Offsite Ads, add 12–15% more. The calculator stacks them all and shows what actually reaches your bank.
Margin vs. markup — know the difference
Margin is profit as a share of the selling price. Markup is profit as a share of cost. Buy at $12.50 and sell at $24.99: profit is $12.49, margin is 50%, markup is 100%. Mixing them up is the most common pricing mistake in retail — targeting "50% margin" but calculating 50% markup leaves you far thinner than you think.
Frequently asked questions
Are these calculators really free?
Yes — free, no signup, no limits. They run entirely in your browser; your numbers never leave your device.
How much does eBay take from a sale?
For most categories, 13.6% of the total sale amount (item + shipping charged to the buyer) plus a $0.30–$0.40 per-order fee. Store subscribers get a discount in many categories, and some categories run higher or lower — check your Seller Hub for your exact rate, then enter it here.
What are Walmart Marketplace seller fees?
Walmart charges no setup or monthly fee. You pay a referral fee of 8–15% depending on category — 15% for most. If you use Walmart Fulfillment Services, a per-unit fulfillment fee based on size and weight is added.
How much does Etsy take per sale?
A $0.20 listing fee, 6.5% of item + shipping as a transaction fee, and payment processing (3% + $0.25 for US sellers, 4% + £0.20 in the UK). If the sale came from Offsite Ads, another 12–15% applies. Combined, mandatory fees typically total around 10–12% plus fixed amounts.
Where do I find my exact Amazon FBA fulfillment fee?
In Seller Central, open the Revenue Calculator or your product's fee preview. FBA fees depend on the size tier and shipping weight of your product and change with Amazon's periodic fee updates, so always paste the current number into this calculator.
What's a good profit margin for an online seller?
After all fees and product costs, many healthy e-commerce businesses net 15–30% per order. Below 10%, returns, damaged stock, and ad-cost swings can erase profit entirely.
How do I calculate break-even price?
Break-even is the price at which revenue exactly covers all fees and costs — profit is zero. Each receipt computes it for you, correctly accounting for percentage-based fees. Any price above break-even is profit; anything below is a loss on every unit.