Amazon FBA Fee & Profit Calculator

The three fees that eat into an Amazon FBA sale

Selling through Fulfillment by Amazon means three separate charges come out before you see a dime: a referral fee (Amazon's cut for the sale itself, set per category -- commonly 15% for a broad 'Everything Else' bucket, but as low as 8% for consumer electronics or as high as 17% for clothing), an FBA fulfillment fee (a flat per-unit cost for picking, packing and shipping, tiered by size and weight), and a monthly storage fee charged per cubic foot your inventory occupies in an Amazon warehouse. Note: exact referral and fulfillment rates vary by sub-category and specific dimensions; use Amazon's Revenue Calculator for a shipment-specific quote before committing to a large order.

Storage fees roughly triple during the October-December peak season versus the rest of the year, reflecting the holiday capacity crunch -- a unit sitting in a warehouse through November costs meaningfully more to store than the same unit in June, which is a strong incentive to time inventory to sell through before peak season if you can.

The FBA fulfillment fee is a flat dollar amount per unit based on size and weight tier, not a percentage, which means it eats a much bigger share of margin on a low-priced item than a high-priced one -- a $3.22 fulfillment fee on a $12 item is over a quarter of the sale price, while the same fee on a $60 item is barely 5%.

Where these numbers come from

The formulas and default values in this calculator are based on:

• Amazon Seller Central published fee schedules for 2025-2026: referral fees by category (commonly 8-17% depending on category, 15% typical default)
• FBA fulfillment fees by size tier (approximate 2025 rates: $3.22 small standard, $4.75-5.65 large standard, $9.50+ oversize)
• monthly storage fees of approximately $0.87 per cubic foot (Jan-Sep) and $2.40 per cubic foot (Oct-Dec) for standard-size items. Note: these are representative figures
• use Amazon's own Revenue Calculator tool for an exact per-ASIN quote, since rates are frequently updated and vary by exact product dimensions

Platform fee schedules change. These are planning estimates based on the most recently published rates -- always confirm the current fee schedule on the platform itself before relying on the exact number for a real payout.