Marketplace Fees

FBA vs FBM Calculator

Compare your profit per unit when Amazon fulfils your orders (FBA) against shipping them yourself (FBM) — same product, same price, side by side.

verifiedRates checked October 2026lockRuns in your browser

Your numbers

$
$

FBA — Amazon ships

$

From Amazon’s Revenue Calculator for your size tier

$

Monthly storage ÷ units sold per month

$

Shipping to Amazon, placement, labels

FBM — you ship

$

0 for free shipping

$
$

Box, filler, your time

Results

FBA earns more per unit

$0.95

FBA $12.14 vs FBM $11.19 profit per unit

FBA profit per unit
$12.14
FBA margin
40.48%
FBA referral + fulfilment + storage + inbound
$10.35
FBM profit per unit
$11.19
FBM margin
37.31%
FBM referral fee
$4.50
FBM shipping + handling
-$6.80

Download your results

Branded KleverKlimb report with your inputs and results.

Default rates last checked October 2026. Rates can change and may differ for your account — verify on the official Amazon seller fees page. How we check our rates

How it works

The formula

Exactly what this calculator does with your numbers — no hidden assumptions.

01percent

Same referral fee

Amazon’s referral fee is charged on every sale either way — on the price plus any shipping you charge for FBM orders.

02warehouse

FBA costs

The FBA fulfilment fee for your size tier, plus monthly storage and the cost of getting stock to Amazon, all per unit.

03local_shipping

FBM costs

Your shipping label, packaging and handling per order, minus any shipping you charge the buyer.

FAQ

Questions, answered

Q1Is FBA or FBM more profitable?
It depends on size, weight and price. Small, light, fast-selling items often do better with FBA; large, heavy or slow-selling items often do better with FBM because storage and fulfilment fees climb.
Q2Does FBA sell more?
Often, because FBA listings get Prime delivery, which many shoppers filter for. This calculator compares profit per unit; if FBA sells more units, that can outweigh a smaller per-unit profit.
Q3Where do I get my FBA fee?
Amazon’s Revenue Calculator in Seller Central shows the exact FBA fee for your product. Enter it here along with your storage and inbound costs.
Q4What about Seller Fulfilled Prime?
Seller Fulfilled Prime is FBM with Prime-speed delivery. Use the FBM side with your faster (usually pricier) shipping cost.

Estimates for Amazon.com (US). Returns, long-term storage, low-inventory fees, advertising and the monthly subscription are not included unless you add them.

Keep going

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Guides to read

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Amazon Seller Fees Explained (2026)

4 min read

Dimensional Weight Explained: Why Your Shipping Costs More Than It Should

5 min read

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