Low-inventory-level fee

Amazon charges this fee when a product's inventory sits below roughly 28 days of supply relative to its trailing demand. The logic: chronically thin stock forces the network to fulfill from farther away, so Amazon bills the inefficiency back. It stacks with your other fulfillment costs and quietly erodes margin on exactly the SKUs selling too well.

The fix is a replenishment cadence tied to weeks-of-cover, not gut feel — and for import-lead-time products, an upstream buffer (AWD or a 3PL) so FBA can be topped up in days rather than a container cycle. We watch weeks-of-cover per SKU weekly; the fee is effectively a fine for not doing so.