Amazon FBA Storage Limits Explained

March 9, 2026

Amazon FBA storage limits cap how much inventory you can send to and store in fulfillment centers each month, broken out by storage type. When you hit your limit, inbound shipments get blocked and your ability to replenish takes a hit. Understanding how limits are set, where to find them, and what moves the needle on capacity is core to running FBA without constant supply disruptions.

What FBA Storage Limits Are

Amazon sets a monthly capacity limit for each seller, measured in cubic feet. The limit is not a single number applied to your whole catalog. It is segmented by storage type, so standard-size, oversize, apparel, footwear, and other categories each have their own cap.

That segmentation matters in practice. You can have available capacity in one storage type and still be blocked from sending inventory in another. Checking total capacity without looking at the breakdown by type is a common source of confusion when inbound gets unexpectedly blocked.

Your current limits are visible in Seller Central under the Capacity Monitor. Amazon typically announces limits for the upcoming month on a regular cadence, which gives you a short but workable planning window.

How Amazon Sets Your Limit

Capacity limits are influenced by your Inventory Performance Index (IPI) score alongside other factors including Amazon’s sales forecasts, your shipment lead times, and fulfillment center capacity signals. IPI is designed to measure how efficiently you use the space Amazon allocates to you, with sell-through rate, excess inventory, and stranded inventory as the main drivers.

One important nuance: improving your IPI score does not immediately change next month’s limit. There is a lag between performance changes and how they are reflected in capacity decisions. This makes consistent inventory management more valuable than reactive fixes.

What Happens When You Hit Your Limit

Once your capacity usage reaches the limit for a given storage type, you cannot create new inbound shipments for products in that category. If you have a replenishment cycle that depends on regular inbound, a capacity block can create stockouts faster than you expect, especially during high-velocity periods.

Beyond the inbound block, storage costs escalate the longer inventory sits. Monthly storage fees apply to all units held in fulfillment centers, and aged inventory surcharges kick in for units that have been at Amazon past specific thresholds. The combination of a capacity ceiling and rising storage costs makes slow-moving inventory expensive to hold.

How to Increase Your Capacity

Capacity Manager

Amazon offers a tool called Capacity Manager where sellers can request additional capacity above their assigned limit. Requests are evaluated based on your account performance and other factors. This is a useful option when you have a near-term need, such as a seasonal push, but it is not a substitute for operational improvements that raise your baseline limit.

Operational levers that move the limit over time

Remove or liquidate slow-moving units to free up space and improve sell-through rate
Resolve stranded inventory promptly since stranded units count against your capacity without contributing to sales
Tighten replenishment planning using sales velocity and lead time so you are not sending more than you will sell in the near term
Reduce excess inventory by adjusting reorder quantities and safety stock assumptions

The Fee Picture

Storage limits and storage fees are connected. Even when you are under your capacity limit, monthly storage fees make overstocking expensive. Fees vary by time of year, with higher rates during the fourth quarter. Aged inventory surcharges layer on top for units that cross specific age thresholds, assessed at set snapshot dates during the month.

The practical implication: holding excess inventory does not just consume capacity, it costs money at an increasing rate the longer it sits. That dynamic makes inventory age a more useful metric to track than total units on hand.

A Monthly Operating Cadence

A consistent weekly routine keeps limits from becoming a crisis:

Week 1: audit stranded inventory and excess units by storage type
Week 2: make removal or liquidation decisions on slow movers
Week 3: build the next month’s inbound plan based on velocity and lead time
Week 4: incorporate the new monthly limits once announced and adjust purchase orders accordingly

Troubleshooting Common Capacity Issues

Problem	Likely Cause	First Action
Have capacity but inbound is blocked	Storage type mismatch or shipment-level constraint	Check Capacity Monitor by storage type, not just total
Limit dropped unexpectedly	IPI decline, sell-through slowdown, or excess inventory increase	Review IPI drivers and prioritize stranded and excess units
Approaching limit with peak season ahead	Insufficient capacity for forecasted volume	Request additional capacity through Capacity Manager early

Storage limits reward the same behaviors that make FBA profitable in general: fast sell-through, low excess inventory, and clean listings. Brands that manage capacity well treat it as an inventory governance metric, not just a shipping constraint. Keep sell-through high, age low, and stranded inventory at zero, and capacity rarely becomes the limiting factor in your growth.