Amazon FBA Profit Calculator

Amazon introduced over a dozen new fee types between 2024 and 2026. The Inbound Placement Fee alone adds $0.21-$1.58 per unit - a cost that didn't exist before April 2024. The Low-Inventory-Level Fee (LIVE) penalizes sellers who let their historical days of supply fall below 28 (measured per FNSKU since 2026); keeping roughly 35 days of stock is the safe buffer. And after Amazon ended its FBA prep services in January 2026, the Inbound Defect Fee charges up to $5.72 per unit if your shipment prep or labeling doesn't meet Amazon's standards.

Most profit calculators online still use 2023 fee structures. That means your margin calculations could be off by 5-15%. Our calculator includes every current Amazon FBA fee so you can make sourcing and pricing decisions based on real numbers, not outdated estimates.

What Fees Does This Calculator Include?

This calculator covers all major Amazon FBA costs for 2026: Referral Fee (8-20% by category), FBA Fulfillment Fee ($3.22-$9+ depending on size and weight), the +3.5% Fuel & Logistics Surcharge (added to every fulfillment fee since April 2026), Inbound Placement Fee (for multi-warehouse distribution), LIVE Fee (low-inventory penalty, triggered below 28 days of supply), Monthly Storage Fee ($0.56-$2.40/cu ft), Aged Inventory Surcharge (now starts at 181 days), Inbound Defect Fee (prep non-compliance penalty), Return Processing Cost, China and other country tariffs (up to 145%), and PPC advertising cost per unit. You can also model New Selection Program launch pricing (referral capped at 10% on your first 100 units).

How to Use This Calculator

Enter your selling price, product cost (COGS), and units per month. Select your category for the correct referral rate. Input your FBA fee, weight, and size tier. Adjust the 2026-specific fees - Inbound Placement, LIVE, Storage, and Defect - based on your product. Add your tariff rate and PPC spend. The calculator instantly shows your per-unit profit, monthly revenue, and a comparison between 2023 and 2026 margins so you can see exactly how new fees affect your bottom line.

Frequently Asked Questions