Are defaults live Amazon rates?

No. They are illustrative. Always replace them from Seller Central or Amazon’s published fee pages for your marketplace.

Does this include Amazon ads?

No. PPC and deals are outside this fee stack—model them separately after contribution per unit is clear.

Is this an official Amazon tool?

No. It is an educational fee and contribution arithmetic guide.

Amazon FBA Fee Basics: Referral, Fulfillment, and Storage

Amazon FBA planning usually combines a category referral percent on the sale with per-unit fulfillment fees from a size/weight tier, plus storage and other Amazon charges you choose to attribute. This guide explains that arithmetic and links to the interactive worksheet. Rates are user-entered—not a live Seller Central estimate.

What This Worksheet Actually Answers

Given a sale price, unit count, referral percent, fulfillment fee, attributed storage/other Amazon fees, and product cost, what are total Amazon-style fees, net after those fees, contribution profit, and effective fee percent? It does not model PPC ads, returns reserves, or inbound placement programs automatically.

Educational worksheet, not Seller Central

Illustrative defaults (for example 15% referral, $5.47 FBA fulfillment, $0.50 storage) are planning placeholders. Replace every figure from Amazon’s fee documentation and your Seller Central fee preview for the correct marketplace and size tier.

The Inputs That Drive the Math

Sale price per unit, units sold, referral fee percent, FBA fulfillment fee per unit, storage fee attributed per unit, other Amazon fees per unit, and product cost (COGS) per unit.

Inputs and Limits

Input	Role in the model	Common confusion
Sale price per unit	Base for referral percent × units	Mixing list price with net after coupons
Referral percent	Category percent of revenue	Using one percent for every category
FBA fulfillment fee	Fixed pick-pack-ship per unit	Ignoring size-tier or peak changes
Storage / other	Attributed Amazon costs per unit	Double-counting monthly storage in overhead
Product cost	COGS subtracted after Amazon fees	Forgetting inbound freight in landed cost

How the Worksheet Orders the Math

Step 1

Compute revenue = sale price × units.

Step 2

Compute referral fees = revenue × referral percent / 100.

Step 3

Add fulfillment, storage, and other Amazon fees × units.

Step 4

Net after Amazon = revenue − total Amazon fees; contribution = that net − product cost.

Fees can exceed the sale

Unlike some checkout fee worksheets, this model allows negative net when fixed fulfillment dominates a low price. That is a feature for inventory decisions, not a bug.

Open the Amazon FBA Fee Calculator

Run a labeled scenario with your Seller Central numbers:

Amazon FBA Fee Calculator

Bottom Line

Price and source with referral plus fulfillment in mind, then verify against a real fee preview before you send inventory to Amazon.