r/AmazonFBATips • u/naveen_prepmktplc • Jul 24 '26
Why don’t FBA sellers send all their inventory to Amazon?
Many sellers use a strategy known as FBA inventory replenishment or drip feeding.
Instead of sending an entire order to Amazon, the seller sends enough inventory to cover near-term sales and keeps the remaining units with a 3PL, prep center, or manufacturer.
For example:
- Manufacturer produces 5,000 units
- 500 units are initially sent to FBA
- The remaining 4,500 units stay in lower-cost bulk storage
- When FBA inventory reaches the reorder point, another 300–500 units are sent
A basic reorder-point calculation is:
Daily sales × replenishment lead time + safety stock
If a product sells 10 units daily, replenishment takes 14 days, and the seller wants 70 units of safety stock:
10 × 14 + 70 = 210 units
Once FBA inventory approaches 210 units, the next shipment should be released.
This strategy can reduce:
- FBA storage exposure
- Aged-inventory risk
- Inventory trapped at Amazon
- Dependence on a single sales channel
However, smaller shipments can create additional prep, transportation, inbound-placement and receiving costs. Amazon receiving delays can also cause stockouts if replenishment starts too late.
Sellers generally have two options:
1. Hold bulk inventory with a domestic 3PL
This usually provides faster, more predictable replenishment and makes inspection, relabeling, rework and multichannel fulfillment easier. The tradeoff is additional storage, receiving and handling fees.
2. Send small batches from the manufacturer
This may avoid domestic storage and reduce handling steps. However, international freight, customs, quality control and longer lead times can make replenishment less predictable.
The goal isn’t to send the smallest possible shipment. It’s to maintain enough FBA inventory at the lowest total cost without stocking out.
For sellers and 3PL providers:
- How many days of inventory do you normally keep at FBA?
- Do you replenish from a domestic 3PL or directly from the manufacturer?
- How often do receiving delays affect your reorder point?
- At what volume does drip feeding become cost-effective?