What is the Amazon FBA restock limit?

It is the cap on how much inventory you can send to and store in Amazon's fulfillment centers. Since March 2023, Amazon has set it as a monthly capacity limit per storage type, measured in cubic feet and including shipments not yet received.

How do I check my FBA restock limit?

Open the Capacity Monitor in Seller Central to see confirmed and estimated limits, usage and open shipments by storage type. When you build a shipment in Send to Amazon, also check for quantity caps on individual SKUs, which some sellers have reported since 2025.

Why did my FBA restock limit go down?

Common reasons are excess or aged inventory, stranded listings, lower sales forecasts after a stockout, long shipment lead times and network space pressure before Q4. Improving sell-through and clearing slow stock raises IPI, which Amazon says influences your limits.

Does Amazon limit restock by ASIN?

Amazon's official system sets limits by storage type. However, many sellers have reported per-ASIN caps since April 2025, often tied to about 90 days of supply, and Amazon has not published a formal announcement. Treat the quantity Send to Amazon allows as the working limit.

How can I send more inventory to FBA?

Clear excess and aged stock to lift your IPI, ship smaller loads more often, keep reserve inventory in Amazon Warehousing and Distribution or a 3PL, and request extra space in Capacity Manager for stock you are confident will sell through within the month.

Amazon FBA Restock Limit: What It Is and How to Work With It

What changed: Limits on how much inventory you can send into FBA
When: Monthly capacity limits since March 1, 2023; seller-reported ASIN caps since April 2025
Who it affects: FBA sellers planning inbound shipments
What to do: Check the Capacity Monitor before every purchase order and shipment

Key takeaways

Restock limits now mean monthly capacity limits per storage type, in cubic feet, set in week three of each month.
Sellers report ASIN-level caps since April 2025, so check quantities in Send to Amazon as well.
Keep reserve stock upstream and replenish FBA in smaller, more frequent shipments.

How FBA restock limits changed

Apr 2021
Storage-type limits replace ASIN limits
Mar 1, 2023
One monthly capacity limit per storage type
Apr 2025
Sellers report ASIN-level caps
Jan 1, 2026
US prep services end

What is an Amazon FBA restock limit?

A restock limit is the most inventory Amazon will let you have in, or on the way to, its fulfillment network. The term comes from Amazon's older system, which used weekly restock limits by storage type alongside quarterly storage limits. In April 2021 Amazon moved from ASIN-level quantity limits to storage-type limits, and on March 1, 2023 it replaced weekly restock and quarterly storage limits with one monthly capacity limit per storage type.

Today, when sellers talk about their restock limit, they usually mean that monthly capacity limit, which our Amazon FBA capacity limits guide covers in depth.

How restock limits are calculated now

Amazon says capacity limits are influenced by your Inventory Performance Index (IPI), sales forecasts for your ASINs, shipment lead time and available fulfillment center capacity. The limit counts both inventory on hand and shipments not yet received, and it is measured in cubic feet, so bulky items fill it much faster than small ones.

Amazon announces next month's limit in the third full week of each month, with estimates for the two months after. Those estimates can rise or fall depending on how efficiently you use space.

Are ASIN-level restock limits back?

Seller reports since April 2025 describe caps on how much of a single ASIN can be sent, often tied to around 90 days of supply, and some sellers posted on Amazon's forums that their storage allocation was cut sharply. Amazon has not published a formal Seller Central announcement confirming a new ASIN-level rule.

In practice, treat the Send to Amazon workflow as the final word. If it limits the quantity you can send for an ASIN, plan around that number and use the Capacity Monitor for the overall picture. Amazon representatives have pointed sellers to three remedies: clear excess or aged stock, request space in Capacity Manager and use Amazon Warehousing and Distribution for longer-term storage.

How to check your restock limit

Look in two places before you place a purchase order, not just before you ship.

Capacity Monitor: confirmed limit for this month and next, estimates for two more, current usage and open shipments by storage type
Send to Amazon: any quantity caps on individual SKUs when you build a shipment
Inventory Performance dashboard: your IPI score and the factors pulling it down
Restock Inventory report: Amazon's suggested quantities and timing per SKU

Where to check before you ship

Capacity Monitor limits
Send to Amazon SKU caps
IPI and its drivers
Restock Inventory report

Why your restock limit dropped

A lower limit usually points to inventory health, not a penalty.

Excess inventory relative to recent sales
Aged stock that has sat for more than 181 days
Stranded inventory with no active listing
Falling sales forecasts after a stockout or price change
Long lead times between creating and delivering shipments
Network-wide space pressure, especially ahead of Q4

How to work within FBA restock limits

The goal is to keep winners in stock without using more cubic feet than you need.

Prioritise space for your highest margin, fastest selling ASINs
Ship smaller loads more often to keep lead times and on-hand stock low
Hold reserve stock at a 3PL or in Amazon Warehousing and Distribution
Clear slow movers with coupons, deals or a removal order
Request extra space in Capacity Manager only for stock that will sell
Keep an FBM offer on key ASINs as a backup if FBA runs low

	Helps your limit	Hurts your limit
Fast sell-through
Aged stock over 181 days
Short shipment lead times
Stranded listings

IPI is the lever you control.

Plan restocks around prep and fees

Two 2026 changes affect restock planning. Since January 1, 2026, Amazon no longer preps or labels US FBA inventory, so every replenishment needs prep time at your facility or a prep center. And FBA fees rose by an average of $0.08 per unit from January 15, 2026, with a 3.5% fuel surcharge on fulfillment fees from April 17. Storage also costs far more from October to December, which is another reason to send holiday stock in stages. See our Amazon FBA fees guide for the full picture.

What restock limits mean for ads

Restock limits and advertising are linked. If a capped ASIN keeps running aggressive ads, it can sell out before the next shipment lands, losing rank and wasting the ad spend that built it. Match ad budgets to available stock and lift them when inventory arrives. Also read our post on Amazon stockouts and rank for how to recover.

Where PPC Spider helps

PPC Spider's FBA inventory management service forecasts demand per ASIN and plans shipments within your limits. SpiderOS monitors stock alongside bids, budgets and search terms, so ads ease off before a capped product runs out. For a review of your IPI, limits and replenishment plan, book a free Amazon audit.

Sources

Amazon: Announcing a new streamlined FBA capacity management system (sell.amazon.com/blog/announcements/fba-capacity)
Amazon Seller Forums: Simplified FBA capacity limits announcement (sellercentral.amazon.com/seller-forums/discussions/t/3c9cef3c-530b-4846-a3b3-a855ed62f241)
Seller Labs: Amazon restock limits strategy, updated April 2026 (sellerlabs.com/blog/amazon-restock-limits-2026-strategy/)
Amazon Selling Partner API: US FBA prep and labeling services to end January 1, 2026 (developer-docs.amazon/sp-api/changelog)

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