Amazon Low Inventory Fee Calculator
Days of cover, and the reorder point.
Amazon revises fee schedules at least annually and adds new surcharges more often. These defaults are a starting point — the figures in your own fee preview are the ones that describe your ASINs.
Days of cover
22 days
in the fee zone
Below roughly four weeks of cover the low inventory fee applies to every unit you sell — $115 a month here. With a 45-day lead time you need to reorder at 540 units of cover, not at zero.
How the Amazon Low Inventory Fee Calculator works
Amazon charges a fee when your cover falls below roughly four weeks, on the reasoning that thin stock makes its delivery promises harder to keep. It applies per unit sold, so it hits hardest exactly when you are selling well and running short.
Not financial advice. Marketplace fees change, and they vary by country, plan and seller status. Every rate here is an editable default, not a quoted price — check the platform's current fee schedule before you price a product against it. This is not tax or business advice.
Frequently asked questions
What triggers the low inventory fee?
Historical days of cover falling below the threshold, assessed against your recent sales rate. It applies to units sold while cover is low, not to units held.
How much cover should I hold?
Enough that your reorder point sits above the threshold given your lead time. With a ten-week lead time, reordering at four weeks of cover guarantees you spend six weeks paying the fee.
Why does it hit growing products hardest?
Because cover is measured against recent sales. A product that suddenly sells twice as fast halves its days of cover overnight, without a single unit leaving the shelf unexpectedly.
How do I avoid it?
Reorder against lead time plus safety stock rather than against a fixed unit count, and use a third-party warehouse to buffer so you can replenish FBA quickly without holding everything there.