Amazon Inventory Management: How to Avoid Stockouts
Nothing kills an Amazon product like running out of stock. Every day without inventory, you lose sales, rankings, and visibility. This guide shows you how to maintain perfect inventory levels.
The Cost of Stockouts
- Lost revenue — obvious but quantifiable
- Ranking drops — algorithm penalizes periods of zero sales
- Increased ad costs — lower ranking means higher CPC to maintain position
- Review stagnation — no sales means no new reviews
Key Metrics to Track
Daily Sales Velocity
Average units sold per day over the last 30 days. This is your baseline.
Lead Time
Days from placing order with supplier to receiving inventory at FBA. Typically 30-60 days from China.
Safety Stock
Extra inventory held to buffer against demand spikes or supply delays. Typically 14-30 days of sales.
Reorder Point
The inventory level that triggers a new order: Reorder Point = (Daily Sales × Lead Time) + Safety Stock
The Ordering Formula
Order Quantity = (Expected Sales During Lead Time) + Safety Stock − Current Inventory
Seasonal Planning
Q4 (October-December) requires special attention:
- Demand typically increases 2-3x
- Supplier lead times extend due to holiday shipping
- FBA capacity constraints can delay receipts
Plan orders 90 days before peak season.
Using Our Calculators
Our Reorder Point Calculator helps you determine exactly when to order. The Safety Stock Calculator shows how much buffer you need.
Stocks out are expensive. Plan ahead, track velocity weekly, and always have a contingency supplier.