You listed a trade paperback for $20 on Amazon. A customer buys it. Congratulations - but before you calculate profit, it helps to understand exactly how many hands that $20 passes through before any of it reaches you.
Amazon's fee structure for books is layered, and each layer quietly shrinks your margin. Here is a complete breakdown of every charge so you know exactly what you are working with.
The Three Core Fees on Every Amazon Book Sale
1. The Referral Fee: 15%
Amazon charges a 15% referral fee on the total sale price of books. On a $20 book, that is $3.00 taken off the top before anything else is calculated. This fee applies whether you ship the book yourself or use Fulfillment by Amazon.
2. The Per-Item Closing Fee: $1.80
Books fall into Amazon's media category, which carries an additional flat $1.80 per-item closing fee on every single sale. This is separate from the referral fee and is charged regardless of the sale price. Combined with the 15% referral fee, you are already down $4.80 on a $20 book before you have paid for a single stamp or box.
3. FBA Fulfillment Fees: ~$3.22 Pick and Pack + Storage
If you use Fulfillment by Amazon - which most sellers do to qualify for Prime shipping - the fees continue. For a standard trade paperback weighing approximately one pound, Amazon's FBA pick-and-pack fee runs approximately $3.22. On top of that, monthly storage fees typically add $0.50 to $1.00 per unit depending on the time of year (rates increase significantly in Q4).
What That Looks Like on a $20 Book
| Fee | Amount |
|---|---|
| Referral fee (15%) | $3.00 |
| Per-item closing fee | $1.80 |
| FBA pick and pack | $3.22 |
| Storage (monthly estimate) | $0.50 |
| Total Amazon take | ~$8.52 |
That is roughly 42-45% of your $20 sale price going to Amazon in fees alone - before you account for the cost of the book itself.
The Hidden Cost: What Remains
After Amazon's fees, you have approximately $11.48 left from a $20 sale. From that, you still need to cover your wholesale book cost. A typical trade paperback wholesale cost can run $8-12 depending on the title and source. Depending on your supplier, you may be looking at very slim margins - or no margin at all on lower-priced books.
Why Sellers Often Don't Realize This Until It's Too Late
Amazon presents these fees across multiple dashboards and reports, making it easy to focus on revenue and miss the full fee picture. Many new sellers calculate profit based on the referral fee alone (15%), not realizing the closing fee and FBA charges are stacked on top.
A Different Path: Shopify + BooksCloud
Platforms like Shopify with a dropshipping app like BooksCloud change the math considerably. BooksCloud is free to install and charges on a pay-per-sale basis - you pay the book's wholesale cost plus a flat $7 shipping fee per order. Shopify's Basic plan runs $39/month plus 2.9% + 30¢ per transaction with Shopify Payments. There are no media-specific closing fees and no FBA overhead.
More importantly, every customer who buys from your Shopify store is your customer - their email address, their purchase history, and their future repeat business all belong to you. Amazon does not offer that.
Understanding where every dollar goes is the first step toward choosing the platform that actually works for your book business - not just the one with the most built-in traffic.