Running out of FBA storage space is not just annoying. It traps your cash in pallets that cannot move and forces you to throttle sales on SKUs that could be scaling.
The good news: Amazon has made the process to request more space very clear. No back‑and‑forth with Seller Support. No secret loopholes. There is one place Amazon expects you to go when you need more capacity: Capacity Manager.
In this post, I will walk you through exactly how to use Capacity Manager, how the bidding piece actually works, and how to plan ahead so you are not begging for space in the middle of a sales spike.
Step 1: Find Your Real FBA Capacity Numbers
Before you request more space, you need to know two things: how much you have and how much Amazon is planning to give you.
You can get there two ways:
- From the main menu, go to Inventory → FBA Inventory.
- Or go to Shipments.
At the bottom of either page, open the Capacity Monitor. Then click the button that says “Go to Capacity Manager.”
That page is your control panel. It shows:
- Your current capacity by storage type (standard, oversize, extra‑large, apparel, footwear).
- The limits Amazon has already set for the next few months.
You will notice that some categories, like hazmat and flammable, cannot be increased through this process. For everything else, this is where you make your move.
Step 2: Choose the Month and Storage Type
Inside Capacity Manager, find the storage type you care about (for example, apparel) and click “Create new request.”
On the request screen you will:
- Pick the month you want more space for.
- Choose the storage type you want to increase.
A couple of important details:
- You generally cannot increase capacity for the current month once it is finalized. If the current month shows as grayed out, Amazon has locked it in.
- You will usually see the next two or three months available. That is your window to plan ahead.
If you know you are going to need more space for a future launch or peak season, you want to be making these requests well before that month starts.
Step 3: Enter Your Capacity Request (And Bid)
Now you will fill out three key fields:
- Requested capacity
- Enter the total cubic feet you want for that storage type in that month.
- This is not “extra on top.” It is the total number you want to land at.
- Maximum reservation fee per cubic foot
- This is your bid. It tells Amazon how much you are willing to pay per cubic foot for that extra capacity if they approve it.
- Your total maximum fee is: requested capacity × your bid per cubic foot.
- Current limit: 218 cubic feet
- You request: 400 cubic feet total
- Bid: 0.25 per cubic foot
- Expiration date
- This is how long your offer stays on the table.
- If Amazon does not accept it by that date, the request expires and you can submit a new one with a different bid.
My recommendation on bidding:
- Do not start with an aggressive, sky‑high number.
- Start with a reasonable bid you would actually be comfortable paying if needed.
- If Amazon does not grant it, come back, increase the bid slightly, and resubmit.
Capacity Manager even includes an “I need help” link that can walk you through estimating how much capacity you actually need for a new product based on price, expected sales, and dimensions. Use it if you are unsure how much to request.
When you are happy with your volume and bid, hit “Submit request.”
Step 4: What Happens After You Submit
Once you submit, your request goes into Amazon’s internal queue.
A few key points to understand:
- Amazon prioritizes requests with higher reservation fees per cubic foot.
- They grant requests up to the amount of space they have allocated for that period.
- You only pay a reservation fee if the request is actually granted.
If your request is:
- Approved: your new capacity limit for that month will reflect the increased volume. You can start planning and shipping against that number.
- Rejected or expired: go back into Capacity Manager, create a new request for the same month and storage type, and bump your bid up to the next level you are comfortable with.
This is why timing matters. If you are requesting capacity for a month that starts in a few days, you have almost no room to adjust your bid. If you are requesting for a month that is six to eight weeks out, you can afford a couple of lower bids before increasing.
Step 5: Plan Ahead So You Do Not Hit a Wall
The sellers who struggle the most with capacity are usually the ones who wait until they are already in trouble.
Here is how to stay ahead of it:
- Check Capacity Manager at least once a month. Look at the next two to three months of projected capacity, not just the current limits.
- Work in cubic feet, not units. Know the volume of your key SKUs so you can quickly estimate how much space an upcoming shipment will consume.
- Request additional capacity as soon as you know you will need it. For example, if it is February and you are planning a big April push, start submitting requests for April now.
- Have a walk‑away number on your bid. If the extra storage would not pay for itself in margin and velocity, do not overpay for capacity that does not move the needle.
The goal is not to win every bid. The goal is to secure the right amount of space, at a price that still keeps your SKUs profitable.
Stop Guessing: Work the System Amazon Built
The old days of begging Seller Support for more space or hoping you get a “nice” rep are mostly gone. Amazon has moved that decision into a single system, with clear rules: Capacity Manager.
If you learn how to:
- Read your capacity numbers
- Request the right volume in the right month
- Bid strategically instead of emotionally
you will stop being surprised by storage limits and start using them as another lever in your inventory strategy.
If you want help working through your specific situation, my team lives in this stuff every day. We can review your storage limits, shipment plans, and margins and help you build a capacity strategy that keeps your best SKUs flowing instead of sitting on the floor.