Amazon FBA Fees 2026: Complete Calculator & Impact Guide Executive Summary Amazon FBA fees are increasing January 15, 2026. The average fulfillment fee rises $0.08/unit for standard-size items priced $10-$50, and $0.31 for items over $50. New inbound defect fees jump from $0.02-$0.07 to $0.32-$5.72. This guide provides marketplace sellers with actionable strategies to calculate…