Low-inventory-level fee
Amazon adds a fee to every unit shipped when your stock is low relative to sales. Check whether it applies to you, what it costs, and how many units fix it.
| Tier | Weight | Under 14 days | 14 to under 21 days | 21 to under 28 days |
|---|---|---|---|---|
| Small standard | Up to 16 oz | $0.89 | $0.63 | $0.32 |
| Large standard | Up to 3 lb | $0.97 | $0.70 | $0.36 |
| Large standard | 3+ to 20 lb | $1.11 | $0.87 | $0.47 |
| Small bulky | Up to 50 lb | $1.85 | $1.02 | $0.51 |
| Large bulky | Up to 50 lb | $2.09 | $1.15 | $0.57 |
How the fee works
Amazon charges the low-inventory-level fee on every unit shipped while a product is understocked compared with its sales. Historical days of supply is your average daily units on hand divided by your average daily units shipped, measured over the last 30 days and the last 90 days. The fee applies only when both figures are under 28 days. Since January 15, 2026 Amazon measures this for each seller FNSKU, so each variation is judged on its own stock.
Who is exempt
- Products new to FBA, for their first 180 days
- New professional sellers, for 365 days after their first inventory arrives
- Products selling fewer than 20 units in the last 7 days
- Grocery (from January 2026) and extra-large items
- Sellers replenishing at least 70% of inventory through AWD
Exemptions as reported by AMZ Prep: Amazon Low Inventory Level Fee 2026. Your Seller Central inventory page shows each product's exemption status.
Avoiding it
Keep the short-term figure above 28 days by restocking earlier, or keep enough stock in reserve that the 90-day figure stays above 28. The calculator shows how many extra units on hand would bring your 30-day figure to 28.