Amazon Fulfillment Cost Playbook: FBA vs FBM

Model fulfillment costs so you know when FBA or FBM keeps margin healthy.

Quick start

Best for

Amazon sellers managing fees + fulfillment

Time needed

6 min read

Inputs you’ll need

FBA adds fulfillment and storage fees but can improve conversion.

FBM adds pick-pack and carrier costs but offers more control.

Amazon fees vary by size tier and weight band.

Track your top SKU weights to avoid surprises.

Set a minimum margin target before choosing FBA.

If the margin dips below target, revisit pricing or fulfillment mode.

Next step

Apply this guide using our calculator tools.