Separate FBA and FBM cost drivers
FBA adds fulfillment and storage fees but can improve conversion.
FBM adds pick-pack and carrier costs but offers more control.
Model weight and size tiers
Amazon fees vary by size tier and weight band.
Track your top SKU weights to avoid surprises.
Protect margin with fulfillment thresholds
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.