Amazon FBA Capacity Limits: How to Get More Space Before Peak Season

What FBA Capacity Limits Are

Amazon's FBA capacity limits help page explains that limits help Amazon manage unexpected surges in demand and supply chain disruptions, so it can run its fulfillment network efficiently. For you, they set how much inventory you can send to and store in Amazon's fulfillment centers each month.

You'll find your limits in the Capacity Monitor at the bottom of the FBA dashboard. It shows your current usage by inventory status, the room left for new shipments, and your estimated limits for the next three months.

How Amazon Sets Your Capacity Limit

Who Gets a Limit

• Individual selling accounts have a fixed limit of 15 cubic feet. It doesn't change and can't be increased.
• New Professional accounts (active in FBA for less than 39 weeks) don't receive capacity limits while they build a sales record.
• Other Professional accounts receive one limit per storage type, every month.

When Limits Are Announced

Amazon typically announces limits during the fourth week of the month, in the Capacity Monitor and by email. Each announcement confirms next month's limit and updates the estimates for the two months after it, so your November limit is confirmed in late October.

What Influences Your Limit

According to Amazon, your limit is influenced by your Inventory Performance Index (IPI) score, plus historical sales, seasonal peaks, ASIN forecasts, new selection, scheduled deals, fulfillment center capacity, and shipment lead time. Our guide to IPI score targets and inventory management covers the IPI side in detail.

How Capacity Usage Is Measured

Capacity is measured in volume, not units, and counts inventory on hand plus open shipments on the way.

Storage Types

Each product falls into exactly one storage type based on weight and dimensions: standard-size, oversize, apparel, footwear, or extra-large. You can't change it or trade capacity between types. Dangerous goods are handled separately. Check each product's storage type and volume in FBA Inventory.

How to Calculate Cubic Feet

Multiply length × width × height in inches, then divide by 1,728 (the number of cubic inches in a cubic foot). Amazon's example: a unit measuring 47 × 12 × 10 inches equals 5,640 cubic inches, or about 3.3 cubic feet.

Amazon may verify dimensions using samples of your inventory, and its numbers win if they differ from yours. Measure packaged units carefully.

What Happens When You Hit Your Limit

If your on-hand inventory plus inbound shipments exceed your limit, Amazon blocks you from creating new shipments. You're also blocked if a new shipment would push you over.

In a 2024 Seller Forums announcement, Amazon said it eliminated the US storage overage fee effective July 1, 2024, and its current US help page lists blocked shipments as the consequence. The real cost is lost sales when you can't restock best sellers. See our guide to the low-inventory-level fee for why running too lean also costs money.

Capacity Manager: How to Request More Space

If you expect strong demand, Capacity Manager lets you request extra capacity for a future month at a reservation fee you choose. Requests can be made for any future period with a confirmed or estimated limit, but not for the current period.

How to Create a Request

1. Open Capacity Manager and click Create new request under the storage type you need.
2. Enter the Requested volume in cubic feet.
3. Enter your maximum reservation fee per cubic foot.
4. Set a request expiration date, after which an ungranted request lapses.

No upfront payment is required.

How Requests Are Granted

Amazon assesses capacity regularly (typically twice per week) and grants the highest fees per cubic foot first until space runs out. Granted space lasts the whole period and may be available up to one month early so you can ship ahead. Amazon suggests checking pending requests weekly; you can cancel and resubmit with a higher fee.

The Lowest Reservation Fee Guarantee

You never pay more than your maximum. Everyone granted space in the same week pays the lowest granted fee, and if later requests for that period are granted lower, your fee adjusts down too. So waiting won't get you a better price.

Performance Credits

Once the period starts, you earn a $0.15 performance credit for every dollar of sales generated using the additional capacity. Amazon prorates your FBA sales in that storage type by the share of your total limit that came from the request (MCF sales don't count). Credits can offset up to 100% of the fee, which is charged after the period ends.

Amazon's example: a 1,000 cubic foot limit plus a 500 cubic foot increase means 33% of sales qualify. On $105,000 of sales, that's up to $5,250 in credits.

Should You Bid? A Quick Break-Even Check

The fee is charged whether or not you use the space, and unused capacity may affect your IPI score. Amazon's advice: if you aren't confident you can sell the inventory, don't request it.

Because credits are 15% of qualifying sales, you need qualifying sales of about 6.7 times your reservation fee to offset it completely. Here's an example with made-up numbers:

• Request: 200 cubic feet at $1.00 per cubic foot = a $200 maximum fee (illustrative)
• Sales needed to fully offset it: $200 ÷ 0.15 ≈ $1,333 of qualifying (prorated) sales
• If your original limit is 800 cubic feet, the increase is 20% of your new 1,000 cubic foot total, so you'd need about $6,667 in total FBA sales for that storage type during the period

If the numbers only work in your best-case forecast, free up space instead. Also turn on auto-cancellation: if your confirmed limit comes in higher than the estimate, Amazon cancels up to 100% of your granted request.

Q4 2026 Deadlines That Affect Your Capacity

In its Holiday 2026 announcement, Amazon says its teams shift from receiving inventory in September and October to processing orders in November and December, so limits may be lower. To keep the Prime badge for Black Friday Week and Cyber Monday, inventory must arrive by:

• October 14: Amazon Warehousing and Distribution (AWD) shipments
• October 21: FBA shipments with "minimal shipment splits"
• October 28: FBA shipments with "Amazon-optimized shipment splits" (the option most sellers select)

These are arrival dates, not ship dates. Amazon's peak season readiness guide says inbound processing typically takes 2 to 3 weeks. Its Q4 deadlines post advises booking delivery appointments at least 7 days before the cutoff (14 days for Partnered Carrier pickups) and sending accurate box content information. Our FBA inbound shipping guide walks through creating shipments.

Holiday peak fulfillment fees also apply from October 15, 2026 to January 14, 2027, averaging $0.32 more per unit, plus the 3.5% fuel and logistics surcharge. For event costs, see our guide to deals and promotion fees.

Where AWD Fits

Amazon's Q4 post says inventory auto-replenished from AWD is not subject to FBA capacity limits during peak, and AWD has no additional peak fees.

How to Free Up Space Without Paying for More

Amazon's help page recommends these steps to get more out of the limit you already have:

1. Cancel open shipments you won't send. They count toward usage. Cancel them in the Shipping Queue.
2. Improve sell-through with promotions, outlet deals, ads, or better product pages.
3. Use Multi-Channel Fulfillment to sell the same inventory on your own site. See our MCF guide.
4. Create removal orders. They're reflected in usage within 24 hours, even while pending.
5. Follow restock recommendations on the Restock Inventory page.

Customer returns are added back to your usage when received, so leave room for them.

Common Mistakes to Avoid

• Bidding on hope. The fee is owed even if the space sits empty.
• Waiting too long. Requests can't be made for the current period.
• Ignoring your account. Amazon's peak guide suggests resolving compliance or listing issues before peak. Our Account Health Rating guide explains how.

Putting It Together

Capacity limits decide how much of your holiday plan reaches Amazon. Know your numbers and use Capacity Manager only for inventory you're confident will sell.

The key takeaways:

• Limits are monthly, per storage type, measured in cubic feet, and include open shipments
• Going over your limit blocks new shipments
• Capacity Manager grants the highest fees first; $0.15 credits per sales dollar can offset the fee
• For Black Friday and Cyber Monday, FBA inventory must arrive by October 21 (minimal splits) or October 28 (Amazon-optimized splits)

Your next step: Open the Capacity Monitor today, compare your November and December estimates with your sales forecast, and cancel any open shipments you don't plan to send.