Restock Recommendations vs Restock Limits: What Each One Does
Restock recommendations and restock limits are two different Amazon FBA tools that sellers routinely confuse. Restock recommendations live at the SKU level: Amazon predicts demand for each ASIN over the next 30 to 45 days and suggests a quantity to send in. Restock limits (now governed by FBA Capacity Manager) live at the account level: they cap total cubic feet of inventory you can send in across all SKUs combined. The first answers "how much of this SKU?" The second answers "can I send anything at all?"
Both surfaces appear in Seller Central, sometimes on the same page, and both use the word "restock," which is why the confusion is endemic. The distinction matters because the actions to fix each one are completely different. Low restock recommendations on a single SKU usually means weak forecasted velocity. Hitting your restock limit means you are out of capacity headroom and must either age out inventory, run removal orders, or pay a reservation fee.
How Amazon Calculates Each Number
Restock recommendations come from Amazon's internal forecast model, which uses trailing 8-week sales velocity, seasonality flags, and category-level demand signals. The output is a single suggested send-in quantity per SKU per inbound cycle. The math (simplified):
Restock limits are calculated very differently:
One is forecast-driven and per-SKU; the other is capacity-driven and account-wide.
Worked Example: When the Two Numbers Disagree
Your account has 8,000 cubic feet of standard size restock limit headroom. Across 40 SKUs, Amazon's restock recommendations total 14,500 cubic feet of inbound. The numbers disagree by 6,500 cubic feet.
| Step | Action |
|---|---|
| 1 | Sort SKUs by margin per cubic foot. Highest margin per cu ft fills the limit first. |
| 2 | For SKUs that did not fit, decide: skip the cycle, ship to AWD instead, or bid for additional capacity. |
| 3 | Compare reservation fee cost ($0.40 per cu ft × 6,500 = $2,600) to the gross margin of the deferred SKUs ($30K+ at typical margins). Reservation fee usually wins. |
| 4 | Submit reservation fee bid via Capacity Manager. Wait for Amazon's auto-allocation decision. |
If you took Amazon's restock recommendations literally without checking against the restock limit, you would generate an inbound shipment plan for 14,500 cubic feet, hit the limit at 8,000, and have the remaining shipments rejected with no explanation beyond a generic capacity error.
Why FBA Sellers Need to Treat These Separately
The most common operating pattern is to use restock recommendations as a SKU-level demand signal and the restock limit as a capacity gate. Pull the recommendations into your reorder spreadsheet, but reconcile them with your own forecast (which usually beats Amazon's), then sum the cubic feet and check against your current capacity. Reorder math runs at the SKU level; allocation math runs at the account level.
This is also why most third-party FBA tools track both numbers separately. A tool that shows only restock recommendations is missing half the picture. A tool that shows only the restock limit cannot tell you which SKU to send in first.
Common Mistakes Conflating These Two
Reading the recommendation as a directive. Amazon's restock recommendations under-recommend during ramp-up and over-recommend during the cool-off. Sellers who blindly follow them stock out 30 to 45 days into a growth phase.
Hitting the restock limit and blaming the recommendation. The recommendation is not aware of your account capacity. Sending in everything Amazon recommends will exceed your limit. The limit is a separate gate that you have to enforce yourself.
Not refreshing both numbers weekly. Restock recommendations update daily. Restock limits update monthly (with mid-cycle adjustments). Sellers who plan reorders against a 3-week-old recommendation or a stale capacity number get burned by the gap.
Frequently Asked Questions
What is the difference between restock recommendations and restock limits?
Restock recommendations are Amazon's per-SKU suggested order quantities. Restock limits are the account-level cap on total inventory you can send into FBA, now expressed in cubic feet through Capacity Manager.
Are Amazon's restock recommendations accurate?
Amazon's restock recommendations rely on a 30 to 45 day forward forecast based on trailing sales. They under-recommend during demand acceleration and over-recommend after a sales spike fades. Sellers usually adjust by 20 to 40 percent.
Can I exceed my restock limit?
You cannot ship beyond your restock limit through Send to Amazon; the system blocks the inbound plan. Sellers can pay capacity reservation fees or send inventory to AWD instead.
Should I follow restock recommendations?
Treat restock recommendations as a starting point, not a directive. They do not factor in case pack rounding, MOQ, lead time variability, or marketing-driven demand. Compare to your internal forecast.