Choosing how to fulfil marketplace orders affects your costs, stock availability and daily workload. The right approach depends on the products you sell, where your inventory is held and the delivery service your operation can reliably provide.
This guide explains Amazon FBA and FBM, Walmart Fulfillment Services and seller-managed shipping, with official sources and a practical decision checklist. It focuses on fulfilment planning rather than product listing optimisation. The comparison workflow is our recommendation, not an official marketplace scoring system.
What is the difference between marketplace and seller fulfilment?
Marketplace fulfilment generally means sending eligible inventory into a marketplace-operated fulfilment network. Seller fulfilment means arranging storage, picking, packing and dispatch through your own operation or an agreed third-party logistics provider. Outsourcing physical fulfilment still leaves you with planning and account responsibilities.
Amazon FBA and FBM
Amazon’s official FBA versus FBM guide explains that Fulfillment by Amazon lets sellers send products into its network and outsource packing, shipping, customer service and returns. With Fulfilled by Merchant, sellers manage fulfilment using their own arrangements. Amazon also allows a combination of the two for eligible products.
For your comparison, check product eligibility and your actual operating needs before choosing a method. An existing warehouse, special packing requirements or demand that varies across products may affect the decision. Use current account guidance and product-specific estimates rather than assuming that one option is always cheaper.
Our Amazon Store Management services include inventory and shipment coordination alongside catalogue and account support.
Walmart WFS and seller-fulfilled orders
Walmart’s WFS overview describes its fulfilment network for eligible inventory. Sellers send stock to Walmart facilities, where customer orders are picked, packed and shipped. The programme also includes customer support and returns services within its scope.
Walmart also provides seller-fulfilled shipping options for businesses managing their own fulfilment arrangements. Confirm current programme eligibility, product requirements and service terms before allocating stock.
Our recommendation is to compare the two options using the same products and expected order pattern. Keep inbound preparation and replenishment tasks visible in the plan; sending inventory to a fulfilment centre is only one stage of the workflow.
Explore our Walmart Seller Center Management services for WFS planning and seller-fulfilled coordination.
eBay: make the dispatch promise realistic
For seller-managed shipping, eBay’s handling-time guidance defines handling time around payment and the carrier scan. Creating a shipping label alone is not the same as the carrier receiving the parcel. Your settings should reflect the dispatch process you can actually deliver.
Build carrier collection times, staffing and packing capacity into your daily workflow. A clear handover process helps your team distinguish orders awaiting packing from parcels already collected. Avoid promising a faster dispatch service simply to make an offer appear more attractive.
Our eBay Store Management services can support inventory, order workflows and buyer communication.
Compare the complete cost, not one fee
For an internal comparison, list the costs relevant to each option: inbound transport, preparation, storage, picking, packaging, outbound shipping, returns processing and staff time. Include provider charges that apply to your product or inventory situation. Not every charge applies to every programme.
Use the latest marketplace fee tools, account information and warehouse quotes. This article intentionally does not quote fixed fees because charges vary by market, product dimensions, programme and date. A per-order estimate based on incomplete inputs can hide important costs.
Keep marketplace selling charges and advertising separate from physical fulfilment in your comparison so you can see which costs change with the fulfilment method. Then review the combined picture before deciding.
Choose by product and operating requirements
- Product suitability: confirm size, weight, category, preparation and any special storage requirements.
- Demand pattern: review expected order volume, seasonality and how long stock may remain unsold.
- Warehouse capacity: check whether your team or provider can pick, pack and dispatch reliably.
- Inventory access: decide how frequently you need direct access to the stock.
- Packaging needs: confirm any custom packing is permitted and operationally practical.
- Returns: identify who receives, inspects and records returned items.
- Replenishment: assign responsibility for forecasting, shipment preparation and stock updates.
You do not need to make an identical decision for every product. If you use more than one fulfilment method, document how inventory is allocated and how orders are routed. Check the rules and technical setup for the programmes involved rather than assuming stock is automatically shared between channels.
Create a stock and replenishment routine
Review stock available for sale separately from units being prepared, transported or received. Inventory in transit should not be treated as ready to dispatch until the relevant system confirms its status.
As an internal planning starting point, estimate demand during replenishment lead time and consider an additional buffer for uncertainty. This is a planning aid, not a guaranteed forecast. Adjust it using actual demand, supplier reliability, receiving times and your budget.
Keep a record of who owns each action: the seller, warehouse, carrier, marketplace or management agency. Clear ownership makes it easier to follow up on delays and avoid assuming another party has already handled an issue.
Frequently asked questions
Is marketplace fulfilment always better than shipping orders myself?
No. Compare product eligibility, complete costs, service requirements and operational capacity. A method that suits one product may be unsuitable for another.
Can I use more than one fulfilment method?
Amazon explicitly supports combining FBA and FBM for eligible products. For other programmes or cross-channel arrangements, confirm the specific rules, inventory setup and integrations before implementation.
Does a management agency physically store and ship my products?
Not automatically. Vertix Commerce provides fulfilment coordination within an agreed scope. Physical storage, packing, shipping and carrier services are handled through your chosen fulfilment arrangements unless separately agreed.
What should I prepare before discussing fulfilment support?
Bring your product dimensions, stock locations, order history where available, supplier lead times, current warehouse arrangements and the markets you intend to serve.
Plan fulfilment around your store
Vertix Commerce can help organise stock reviews, shipment tasks and marketplace workflows alongside your wider store management. We agree responsibilities and reporting with your team so the support reflects your operation.
Use our contact form to discuss your products, current fulfilment arrangements and the areas where you need help.
Sources reviewed: 16 October 2026. The linked resources mainly concern US marketplace programmes. Availability, fees and requirements vary by country, account and product; check the current terms before making changes.