Amazon FBA Agency | Eva

Amazon FBA is simultaneously one of the most powerful commerce infrastructure tools available and one of the most expensive when managed poorly. Storage fees, aged inventory penalties, stranded inventory, stockouts during peak demand windows, overstocked SKUs suppressing cash flow — these are not fringe problems. They are the operating reality for most brands running FBA without a system that connects inventory decisions to advertising, pricing, and cross-channel demand. Eva builds that system.

Why Amazon FBA Agency Management Falls Short Without a System

Most FBA management services focus on the operational layer: inbound shipments, inventory health scores, reorder point calculations, removal orders, and case management. That work matters. A disorganized FBA operation is an expensive one. But operational hygiene is not the same as strategic inventory management, and the difference between the two is measured in margin.

The core failure mode is isolation. When FBA inventory decisions are made by someone who cannot see your advertising calendar, your Shopify demand curve, or your TikTok content schedule, those decisions are necessarily reactive. Stock runs out during a product launch because no one coordinated the inventory build with the demand spike. Aged inventory fees accumulate on SKUs that are selling fine on Shopify but were over-allocated to FBA. Replenishment orders lag because the reorder signal did not account for a paid campaign driving velocity above forecast. Each of these is a costly coordination failure — and they are endemic to channel-isolated management.

There is also a pricing dimension. FBA economics — referral fees, fulfillment fees, storage costs — affect margin at the unit level. Pricing decisions made without full FBA cost visibility lead to listings that look profitable at the gross revenue level and are actually margin-negative after fees. Managing FBA without integrating its true unit economics into your pricing model is a profit leak that compounds at scale.

How Eva Approaches Amazon FBA

Eva treats FBA as a fulfillment and economics problem, not an operational checklist. Inventory is positioned across FBA and Shopify fulfillment based on demand signals from all three channels — not assigned by a static allocation rule. When TikTok content is generating demand that will flow into Amazon within 72 hours, FBA inventory position adjusts ahead of that demand. When an advertising campaign is about to drive significant velocity on a specific ASIN, that SKU’s reorder signal tightens. The system reads demand and positions inventory in response — before the stockout, not after.

Pricing inside Eva accounts for FBA unit economics directly. Referral fees, fulfillment costs, and storage fees are built into the profit model that governs pricing decisions. The system does not set prices to win the Buy Box; it sets prices to win the Buy Box at a margin that meets the brand’s profitability target. Those are different calculations. Only one of them builds a profitable business.

Eva’s AI also monitors inventory health continuously. Aged inventory thresholds trigger proactive responses — promotional pricing, removal decisions, or Shopify bundle opportunities — before Amazon’s fee structure penalizes the position. Stranded inventory is resolved algorithmically, not by a weekly manual audit. The operational layer runs automatically so that human attention goes to strategic decisions, not administrative recovery.

What Results Look Like

Eva manages $6B+ in commerce sales and serves 9,000+ brands, including 12 of the top 100 Amazon sellers. The 32% average profit increase brands achieve on the Growth System is driven significantly by inventory and pricing efficiency. At the unit economics level, the difference between a managed FBA operation and a system-optimized one is typically measured in 4–8 margin points per SKU.

The compounding effect is visible at scale. A brand with 200 active ASINs, each losing 3 margin points to inventory inefficiency, repricing lag, and uncoordinated ad spend, is leaving millions of dollars per year on the table. Eva closes that gap by connecting the decisions that were previously made independently: inventory, pricing, and advertising aligned around a single profit target per unit.

Who This Is For

Eva’s FBA management is built for brands with 20 or more active ASINs doing at least $1 million in Amazon revenue. These are brands that have figured out the basics — products are live, FBA is running, shipments are moving — but the economics are leaking.

The typical profile: storage fees that creep up every quarter without a clear cause. Stockouts on top performers that happen right when PPC spend is highest. An FBA allocation that was set up once and never recalibrated against Shopify demand. A reimbursement backlog that nobody owns. These are not signs of a broken business. They are signs of an FBA system that was built to process volume rather than protect margin.

If you are running FBA at scale and your storage fees are growing faster than your revenue, or your reorder accuracy is measured in gut feel rather than data, this is where Eva starts.

What Eva Manages

• Inbound shipment planning: quantity, timing, and split-shipment decisions tied to demand signals and ad calendar
• Inventory health monitoring: IFH scores, aged inventory flags, and stranded inventory resolution across all ASINs
• FBA and Shopify allocation: dynamic reorder rules that account for demand across both channels, not just Amazon
• Reorder points calibrated to PPC calendar: when ad spend increases, reorder triggers tighten automatically
• Automated removal order management: Eva initiates removals before long-term storage fee thresholds activate
• Stranded inventory resolution: systematic monitoring and case filing to clear stranded listings before they compound
• Unit economics model per ASIN: referral fees, fulfillment fees, storage fees, and margin visibility by product
• Buy Box management with margin visibility: pricing decisions made with full unit economics context, not just competitive matching
• FBA reimbursement case management: systematic identification and filing of reimbursement cases against Amazon shipping errors, lost units, and warehouse damage
• Inventory performance forecasting: 90-day demand modeling per ASIN tied to seasonality, ad velocity, and cross-channel signals

Your First 90 Days

Days 1–30: Audit and Baseline

Eva connects to Seller Central and Shopify, then pulls 12 months of transaction, inventory, and fee data. We build a unit economics model for every active ASIN — referral fees, fulfillment fees, storage fees at current velocity, and aged inventory exposure. We identify stranded inventory, calculate the reimbursement backlog, map current reorder points against the ad calendar, and establish an IFH score baseline across the catalog. By day 30, we know exactly where the margin is leaking and what it will take to stop it.

Days 31–60: Implementation

Eva activates inventory allocation rules that account for both FBA and Shopify demand. Removal orders are initiated on aged inventory hitting the storage fee threshold. Reorder signals are recalibrated to the PPC calendar — if a campaign is scheduled to scale, the reorder point moves. Reimbursement cases are filed on the backlog. Stranded inventory is resolved. The unit economics model is live and connected to pricing decisions.

Days 61–90: Compounding Begins

The system is running on live demand data. Storage fee exposure is measurably lower. Reorder accuracy is improving — stockouts on PPC-active ASINs decrease. The reimbursement pipeline is producing recoveries. Buy Box management has margin context, not just price matching. FBA is operating as a connected economic function, not a reactive logistics queue.

The Three Entry Points

Amazon & Shopify Core

FBA inventory management connected to Shopify fulfillment under one system. Demand signals from both channels inform inventory allocation, pricing, and ad spend. No more over-allocation to FBA at the expense of Shopify margin, and no more Shopify stockouts because FBA absorbed all available inventory.

TikTok-Led Demand Engine

For brands using TikTok to drive demand into Amazon. FBA inventory is positioned ahead of TikTok-driven demand spikes so that velocity converts to rank — not to stockouts. Attribution from TikTok content through to FBA sell-through data informs both content strategy and replenishment decisions.

Full Growth System

Amazon FBA, Shopify, and TikTok Shop with unified inventory, pricing, and ad budget management. Eva’s AI allocates units across fulfillment channels based on where margin is highest and where demand is trending. FBA becomes a tool inside a system, not a cost center managed in isolation.

FBA That Optimizes for Profit, Not Just Operations

Clean FBA operations are the floor. Profitable FBA operations are the goal. Eva builds the system that connects your FBA inventory decisions to the advertising, pricing, and cross-channel demand data that determines whether those decisions make or cost you money. Book a growth audit. We will model the unit economics of your current FBA operation and show you specifically where the system gaps are costing margin.

Frequently Asked Questions

Does Eva replace my 3PL?

No. Eva is not a physical fulfillment operation. Your 3PL handles warehouse storage, prep, and inbound freight coordination. Eva manages the decision layer above that: when to send inventory, how much to allocate to FBA vs. Shopify, when to initiate removals, and how to calibrate reorder timing against your ad calendar. Eva connects directly with your 3PL’s workflow to coordinate inbound shipment plans, but we do not replace physical fulfillment operations.

How does Eva handle FBA reimbursements?

Amazon’s error rate on FBA transactions — lost shipments, warehouse damage, weight discrepancy credits, return processing errors — typically leaves 1–3% of annual FBA revenue unclaimed. Eva runs systematic case management against Seller Central’s transaction history to identify eligible reimbursement claims, files them, and tracks resolution. For most brands at $1M+ in FBA revenue, the first 90 days of reimbursement case management recovers meaningful five-figure amounts that were sitting unclaimed.

What happens if a product goes out of stock?

Stockouts on active PPC campaigns are one of the most expensive events in FBA economics — you are paying for ad spend that cannot convert, and the organic rank you built through velocity begins to decay immediately. Eva’s reorder system is designed to prevent this by tying reorder triggers to ad spend signals, not just inventory levels. If a stockout does occur, Eva initiates emergency inbound planning, pauses spend on affected ASINs to stop burning budget, and models the rank recovery path so the response is structured rather than reactive.

How is Eva different from a dedicated FBA account manager?

A dedicated account manager monitors Seller Central and responds to problems. Eva’s system prevents problems by connecting FBA decisions to every upstream variable: your ad calendar, your Shopify demand, your IFH scores, your storage fee thresholds. The other difference is the unit economics model — most account managers track inventory levels. Eva tracks what each unit costs you to hold, and makes decisions accordingly. That is the difference between logistics management and economics engineering.

Does Eva work with Amazon Vendor Central (1P)?

Eva’s primary FBA infrastructure is built for Seller Central (3P). Vendor Central operates on a fundamentally different model — Amazon owns the inventory and sets the retail price, which changes the economics and removes most of the levers Eva’s system relies on. If you operate a hybrid model (some ASINs on 1P, some on 3P), Eva can manage the 3P catalog while providing visibility on how the 1P catalog affects your overall account health. A full 1P-only account is outside Eva’s current operational scope.

Eva manages $6B+ in commerce revenue across 9,000+ brands. If your FBA account is running but your margins are not improving, the system is the problem. We can show you exactly where in 30 days.

Book a growth audit at eva.guru.

For more on Amazon meltable product compliance, see: Amazon Meltable Product Guidelines.