Glossary
Amazon FBA
Amazon FBA (Fulfillment by Amazon) is Amazon's third-party logistics service. Sellers ship inventory to Amazon fulfillment centers, and Amazon handles storage, packing, shipping, returns, and customer service. FBA is the dominant fulfillment model for private-label brands selling on Amazon, and Buy Box eligibility is heavily weighted toward FBA sellers.
Why it matters for Amazon sellers
FBA determines a lot of downstream behavior for Amazon sellers. Prime eligibility, faster shipping, higher conversion, better Buy Box share, and access to certain Lightning Deals and promotions all flow from FBA participation. The trade-off is a fee structure that can get expensive — referral fees, fulfillment fees, long-term storage fees, and IPI score penalties for sellers who keep aged inventory. The rise of Amazon's FBA Capacity Manager and restock limits changed how sellers think about inventory planning. A brand that used to manage 'do we have enough stock?' now also manages 'do we have enough allocation to send enough stock?' That makes demand planning and inventory velocity even more important — running low on allocation can force backorders or merchant-fulfilled sales that hurt Buy Box metrics. AI-driven demand planning that coordinates with PPC and pricing helps sellers stay within FBA capacity while protecting velocity. Modern AI agents need to understand FBA fee structure to make economic decisions; a bid system that ignores fulfillment fees will systematically overvalue sales on fee-heavy categories.
How Profasee handles this
Bruno monitors FBA inventory across your catalog — in-bound shipments, current stock, velocity, and restock capacity. Bruno's signals feed Oracle (pricing) and Marko (PPC) so the whole system adapts to FBA reality: pausing ads when stock tips toward stockout, raising prices on scarce SKUs, and surfacing restock decisions before capacity runs out.
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Frequently asked questions
What is Amazon FBA?
Amazon FBA (Fulfillment by Amazon) is a logistics service where sellers ship inventory to Amazon warehouses and Amazon handles storage, picking, packing, shipping, returns, and customer service. FBA offers include Prime eligibility, faster delivery, and significantly higher Buy Box share compared to merchant-fulfilled offers.
How does FBA affect Amazon profitability?
FBA fees (referral, fulfillment, storage, long-term surcharges) can easily run 25-40 percent of revenue for typical private-label SKUs. That is why contribution margin accounting is essential on Amazon — gross margin alone hides the impact of FBA fees. Good AI-driven pricing and PPC must have real FBA fee data per SKU to make accurate decisions.
What is an IPI score and why does it matter for FBA?
IPI (Inventory Performance Index) is Amazon's score of how efficiently you manage FBA inventory — based on sell-through rate, aged inventory, stranded inventory, and in-stock rate. A low IPI score reduces your restock limits, which caps growth even when demand is strong. Good demand planning keeps IPI scores healthy by matching inventory to velocity.
Related terms
Inventory Velocity
Inventory velocity is the rate at which inventory sells through over a given period, typically expre...
Read the Inventory Velocitydefinition →
Demand Planning
Demand planning is the practice of forecasting future product demand to optimize inventory levels, r...
Read the Demand Planningdefinition →
Buy Box
The Buy Box is the featured offer section on an Amazon product page — the 'Add to Cart' and 'Buy Now...
Read the Buy Boxdefinition →
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