Amazon FBA vs. Walmart WFS Fee Calculator

Auto-detects each platform's size tier from your weight and dimensions (Amazon's Small standard-size / Large standard-size / Large bulky / Extra-large tiers, and Walmart's Standard / Oversize 1 / Oversize 2 / Big & bulky tiers), applies the matching fulfillment-fee formula including Amazon's 3.5% fuel and logistics-related surcharge, and adds the category-specific referral fee for each platform — calculated bracket by bracket (like a tax bracket) for categories with a price breakpoint, not on the whole price at once — including category-specific carve-outs like apparel being excluded from Amazon's Low-Price FBA discount.

Walmart WFS figures use this site's own verified WFS fee breakdown (shipping-weight brackets, apparel/hazmat/low-price/oversize add-ons, and big & bulky freight pricing). Amazon's full fulfillment-fee schedule sits behind Seller Central login, so its fulfillment-fee formulas here are calibrated directly against real results read from Amazon's own Seller Central Revenue Calculator — five verified anchor points across all four FBA size tiers, confirmed October 2026 — rather than fitted from third-party fee trackers. That verification also confirmed two specific mechanics directly from Amazon's live tool: fulfillment fees carry a flat 3.5% fuel and logistics-related surcharge on top of the base fee (effective April 17, 2026, applied here to every size tier), and referral fees for multi-band categories are calculated bracket by bracket, not by applying one rate to the whole price. Referral-fee rates and breakpoints for both platforms come from this site's own verified marketplace-hub fee tables. The under-150-lb. Extra-large branch and a handful of narrow weight bands weren't independently re-verified and keep their prior formulas; for a specific SKU, always confirm the exact fee in Seller Central's Revenue Calculator before pricing, since Amazon updates rates periodically.