The two models in one minute
With FBA (Fulfilled by Amazon) you send stock to Amazon warehouses. Amazon stores, picks, packs, ships and handles many customer service tasks. With FBM (Fulfilled by Merchant) you or a partner store the goods and ship each order yourself.
Where FBA helps a hands-off owner
- Fewer daily tasks: no packing, labelling for each order or carrier booking.
- Prime eligibility, which can lift conversion on many products.
- Amazon handles first-line delivery questions and returns processing.
- Predictable process once inbound shipments are set up correctly.
Where FBA adds work or risk
- Inbound shipments, labels and prep rules must be followed exactly.
- Storage fees and long-term storage charges apply to slow stock.
- Stock can be lost or damaged, which needs claims follow-up.
- Capacity limits and restock limits can restrict how much you send.
- Commingled or unfulfillable stock needs regular clean-up.
Where FBM fits
- Large, heavy or low-volume products where FBA fees are high.
- Products that need custom packaging or personalisation.
- Sellers with an existing warehouse or a reliable 3PL partner.
- Testing a new product before committing stock to FBA.
Where FBM costs you time
Every order needs picking, packing, tracking upload and customer messages within the marketplace’s time limits. Late shipments and cancellations hurt account health. FBM can be hands-off only if a fulfilment partner takes over the whole process and you monitor their performance.
A simple decision table
- Small, fast-moving, lightweight product: FBA is usually worth testing first.
- Bulky, slow or low-margin product: compare FBM or 3PL costs carefully.
- Many SKUs with different sizes: model fees per SKU rather than guessing.
- Seasonal products: plan storage timing so you do not pay long-term fees.
Questions to answer before choosing
- What is the fully loaded cost per unit under each model, including storage, returns and ads?
- How fast must the product reach the buyer to stay competitive?
- Who monitors stock levels and inbound shipments each week?
- What happens when stock is lost, damaged or stranded?
- Can I switch models later without losing reviews or rank?
Hybrid is allowed
Many sellers run FBA for best sellers and FBM for the long tail. Check the rules for each marketplace on mixed fulfilment for the same product.
Illustrative cost comparison
Take one product and list every cost per unit under each model: product, inbound freight, storage, fulfilment fee, packaging, returns, customer service time and advertising. Add them up for FBA, then for FBM or a 3PL. The result may surprise you in either direction, and it often differs between products, so do it per product group.
What a hands-off weekly routine looks like
- Monday: check stock levels and inbound plans.
- Tuesday: review account health and any notices.
- Wednesday: review ads and pricing.
- Thursday: check returns, reimbursements and stranded stock.
- Friday: read a short report and approve decisions.
Whether you or a team do this, writing it down turns a vague wish to be hands-off into a routine that someone owns.
Signs you should rethink the model
- Storage and long-term fees keep rising.
- Late shipments or cancellations are creeping up.
- Customers mention damage or delays in reviews.
- Stock keeps getting stranded or lost without follow-up.
How we can help
Our FBA/FBM Management, FBA Shipment Setup and Reimbursement Recovery services cover the daily work behind either model. We model costs with you before recommending one and cannot promise a specific profit.
