Amazon FBA management

FBA inventory looks like a logistics function and behaves like a marketing constraint. Everything advertising is permitted to attempt is set by how many units are in the network and how long they will last.

Stock cover decides bid strategy

There is no single correct bid for a product. There is a correct bid for a product with four months of cover and a different correct bid for the same product with three weeks of cover.

Deep cover means scaling: push for placement, buy rank, accept a higher ACOS while acquiring position. Thin cover means protecting: defend existing rank, hold branded terms, stop paying to acquire customers you cannot serve. Getting this backwards is one of the most expensive errors in the channel, and it happens constantly when ads and inventory are managed by different people looking at different screens.

The cost of running out

A stockout is not a pause. Organic rank decays while you are unavailable, competitors absorb the placement and the reviews that go with it, and the position you rebuild afterward is bought at full price with advertising spend. The unit margin you missed is usually the smallest part of the loss.

The cost of overbuying

The opposite failure is quieter and just as expensive. Aged inventory surcharges escalate by age band, long-term storage fees land quarterly, and capital sits in a warehouse instead of in the next production run. Inventory age is tracked continuously so that removal, liquidation or a promotional push is a decision made in advance rather than a reaction to a fee that already posted.

What is managed

Restock planning against sales velocity, seasonality and lead time. Shipment plan creation, tracking and receipt reconciliation, including the discrepancies that require a case to recover. Restock limits and Inventory Performance Index. Removal and disposal orders where carrying cost has passed recoverable margin. Multi-marketplace stock allocation where a catalog serves several regions from shared supply.

Where storage cost actually accumulates

Storage is not one fee, and the one people watch is rarely the one that hurts.

Monthly storage is charged per cubic foot and rises sharply in the fourth quarter, so inventory that arrives in September for a January promotion pays peak rates to sit still through the most expensive months of the year. Aged inventory surcharges escalate by age band the longer a unit remains in the network, which means the cost of a slow ASIN compounds rather than accrues. And a low-inventory-level fee now penalises the opposite behaviour — running too lean relative to demand — so under-sending is no longer the safe error it used to be.

The result is a genuine window rather than a direction to optimise in. Too much stock and the surcharges compound; too little and you pay a fee for it and lose rank besides. Amazon publishes the current rates and the FBA fee structure, and they change often enough that a restock model built two years ago is now wrong in ways nobody has noticed.

What that means in practice: inventory age gets watched continuously, not at quarter end, and a removal or a promotional push is scheduled before a band boundary rather than after the fee posts.

Coordination, not replacement

Your freight forwarder, 3PL and manufacturer keep doing their jobs. My role is the Amazon-facing half: what to send, when, in what quantity, and what to do about it when a shipment arrives short.

Inventory is also only one lever of several. Where cover is healthy and the account is still flat, the constraint is usually elsewhere: Seller Central management covers the catalog, pricing and Buy Box side, and listing optimization covers the case where the traffic is arriving and the detail page is losing it.

Who actually runs it

Inventory planning against bid strategy sits with me, because it is the same decision as what advertising is allowed to do. The fee and settlement reconciliation underneath it — what a unit actually costs once every deduction has landed — sits with Faris.

That pairing is deliberate. An inventory plan built on gross margin rather than post-fee contribution will look sound and quietly lose money on every replenishment.

The first thirty days

Week one is read-only: inventory reports, storage fee history, restock limits, IPI, and the settlement data that shows what each unit really nets. No changes.

The output is a cover figure per ASIN, an aged-inventory exposure number, and a list of products where advertising and stock are currently pointed in opposite directions. That last list is usually the one that surprises.

From week two, restock planning runs on a fixed cadence against velocity and lead time, and bid strategy moves with cover rather than lagging it by a month.

Storage exposure is a slow number. Meaningful change in it reads over a quarter, not a fortnight — anyone claiming otherwise is describing a one-off removal order, not a plan.

What it costs

Ongoing management starts at $1,000 per month for a single marketplace. If you would rather start with a diagnosis than a commitment, the account audit is $500 and covers inventory exposure alongside catalog, advertising and account health.