What does the Seller Fee Calculator do?

It helps a seller estimate gross sale amount, item costs, platform fees, shipping subsidy, net amount, margin, and breakeven price before listing or repricing an item.

Does it use exact live marketplace fee rates?

No. It is an editable worksheet, not a live fee schedule. Sellers should check the current marketplace fee page before relying on a final price.

Does it save or send my inputs?

No. The worksheet runs in the browser and does not store or transmit calculator inputs.

Seller Fee Calculator

Pick your platform to load its real 2026 fees, then see what a sale actually keeps after fees, shipping, packaging, discounts, and item cost. Every fee is editable, because your real numbers beat any default.

Estimate only. Not tax, legal, or financial advice. The presets are 2026 starting values (sources at the bottom of this page); platforms change fees and charge category-, tier-, and location-based rates. Always confirm the current fee on the platform's own page before you rely on a result. This tool is not affiliated with or endorsed by any marketplace.

Inputs stay in this page and are never stored or transmitted. The calculator runs entirely in your browser.

Inputs

Load a platform's 2026 fees

Choose a platform to auto-fill its fee fields, or keep "Custom" and enter your own. You can edit any field after loading a preset.

Sale price Shipping charged to buyer Shipping cost paid by seller Item or material cost Packaging cost Discount amount Payment processing % Payment flat fee Marketplace/referral % Marketplace flat/listing fee Other fee % Other flat fee Promotion or ad cost Tax collected/remitted by platform

Formula: gross collected = sale price + shipping charged - discount.

Estimated fees = gross collected times each entered percentage fee + the entered flat fees.

Estimated true net = gross collected - fees - shipping cost - item cost - packaging cost - promotion cost. Tax collected is shown separately and excluded from seller net.

Use the result

If the net is lower than expected, check the largest line item before changing the price.
If the margin is thin, compare packaging, shipping, discount, and promotion cost separately.
Copy the result into your listing notes so you can compare one real sale at a time.

Estimated Result

What this sale may keep $0.00

Enter a sale and costs to see the true-net estimate.

Gross collected$0.00

Estimated fees$0.00

Total costs before fees$0.00

Includes shipping cost, item/material cost, packaging, and promotion/ad cost.

Tax collected separately$0.00

Shown for awareness only; this estimate does not subtract platform-collected tax from seller net.

Estimated true net$0.00

Estimated margin0%

Break-even sale price$0.00

Next decision

Use the estimate to decide which input deserves a closer look before you change the listing.

Free 2026 seller-fee cheat-sheet

Get the fee cheat-sheet by email

One page: what Etsy, eBay, Amazon, Shopify, Mercari, Poshmark, Depop, StockX, Whatnot, PayPal and Stripe really take in 2026, so you can pull it up before you list. We email you if a platform changes its fees. One email, no spam.

Fee sources (accessed 2026-07-21). Etsy: help.etsy.com & etsy.com/legal/fees (6.5% transaction, $0.20 listing, 3%+$0.25 processing; Offsite Ads 12–15% may apply). eBay: ebay.com selling-fees (~13.6% final value fee incl. processing, +$0.30–$0.40/order; varies 2.5–15.3% by category). Amazon: sell.amazon.com/pricing (15% referral, most categories; 8–15% range, $0.30 min; FBA fees extra). Shopify: shopify.com/pricing (Shopify Payments 2.9%+$0.30 Basic; $39/mo plan; +2% for 3rd-party gateways). Mercari: mercari.com help (10% seller fee, reinstated Jan 2025). Poshmark: poshmark.com ($2.95 under $15, 20% at $15+). Depop: news.depop.com (0% selling fee since Jul 2024; processing ~3.3%+$0.45. Approximate, verify). StockX: stockx.com/help (7–9% by seller level + 3% processing). Whatnot: help.whatnot.com (4–8% commission + 2.9%+$0.30). PayPal: paypal.com merchant fees (3.49%+$0.49 G&S). Stripe: stripe.com/pricing (2.9%+$0.30). Figures are representative; confirm the current rate for your category, tier, and location on the platform's own page.