Last Updated: August 7, 2026
Did you know your Amazon FBA restock limit can change without warning? Amazon sets these caps to keep its fulfillment network moving and to reserve warehouse space for products with proven demand.
Most sellers never check the number until a shipment gets rejected. By then they are scrambling to work out what happened and how to fix it before their best sellers run dry.
Knowing where this metric lives, what drives it, and how to manage it keeps you ahead of the penalties, the stockouts, and the cash sitting in a 3PL. Our Amazon agency has managed $1.2B+ in ecommerce revenue across 400+ brands, and broken inventory flow ends more Q4s than a thin ad budget ever has.
This guide covers what restock limits actually represent and how they differ from storage limits. You will also get the diagnostic for a sudden drop, the warning signs that show up first, and the playbook for earning your capacity back.
Table of Contents
We diagnose whether your problem is forecast or storage before you spend another cycle on it.
TL;DR - Amazon FBA Restock Limits
Your Amazon FBA restock limit is a monthly FBA capacity limit measured in cubic feet. Amazon recalculates it from your own inventory health every month.
- Sales velocity drives the number
- IPI gates your storage volume
- Utilization quietly eats your headroom
- Estimated limits preview two months
- Recovery runs four to eight weeks
Your cap is an output, so change the inputs instead of arguing with the result. Our Amazon agency checks client headroom weekly, which is why the third-week update never lands as a surprise.
Understanding the Amazon FBA Restock Limit
Your restock limit is Amazon’s forecast of what it expects you to sell, translated into warehouse space. The number describes your account rather than punishing it, which is why it moves when your selling patterns move.
Amazon retired the old weekly restock cap and quarterly storage volume cap in March 2023, folding both into one monthly capacity limit per storage type and framing the switch as more predictability and control for sellers. Confirmed numbers land in the third week of each month, along with estimates covering the two months after that.
Two updates since then tightened the math. Amazon trimmed forward cover from six months of projected sales down to five in mid-2025, and ASIN-level caps came back for individual SKUs in April 2025 with no announcement in Seller Central.
Why Does Amazon Impose Capacity Limits at All?
Amazon runs a marketplace, not a storage business. Fulfillment centers exist to move product quickly, so space goes to inventory that sells.
New professional sellers get a grace period here. Accounts active on FBA under 26 weeks, or without enough sales data to generate a score, generally do not receive storage limits yet. That window closes quietly, and plenty of brands hit their first cap in month ten.
Where Can You Find Your Amazon FBA Capacity Limit?
Your capacity limit lives in the Capacity Monitor inside Seller Central. Finding it takes about fifteen seconds once you know which path your account uses.
Here is the walkthrough:
1. Log into your Amazon Seller Central account.
Log In to Seller Central
2. Open the Inventory tab and choose Dashboard from the drop-down.
Open the Inventory Tab and Click Dashboard
3. Scroll to the bottom of the FBA Dashboard and click Capacity Monitor. Accounts on the newer Seller Central layout will find the same button in the top right of the FBA inventory section instead.
Click the Capacity Monitor
4. Review each storage type separately. Standard-size, oversize, apparel, footwear, aerosol, and flammable all carry their own independent limit.
Capacity Monitor on Seller Central
Every limit reads in cubic feet, with an estimated unit equivalent shown alongside it for planning. Volume is the binding constraint, so treat the unit figure as a translation rather than the actual cap.
What Do Maximum Shipment, Open Shipment, and On-Hand Mean?
Three numbers make up the monitor, and sellers misread them constantly. On-hand is what sits in fulfillment centers, open shipment is what you created but Amazon has not received, and maximum shipment is what you can still send.
Here is the part nobody explains. On-hand excludes units already pending removal, so your monitor can look worse than your actual position while a removal order processes.
How Is the Amazon FBA Capacity Limit Determined?
Three signals drive the number, and each moves at a different speed. That difference is what makes your cap predictable, because the slow inputs tell you where the fast ones are heading.
| Driver | What Amazon reads | How fast it moves |
|---|---|---|
|
Sales velocity
|
Forecast demand across roughly five months
|
2 to 6 weeks
|
|
Inventory performance index
|
Excess, sell-through, stranded, in-stock
|
4 to 8 weeks
|
|
Storage utilization
|
Weeks of cover sitting in the network
|
1 to 3 weeks
|
How Does Sales Velocity Change My Limit?
Velocity is the dial, and it does most of the work. Amazon multiplies its demand forecast by roughly five months of cover, so faster sell-through converts straight into cubic feet.
Run the math on your own catalog. A SKU moving 300 units a month at 0.5 cubic feet earns around 750 cubic feet of allocation, and slipping to 200 units costs you 250 cubic feet with no policy change involved.
What IPI Score Do I Need To Avoid Restock Limits?
Clear 400 and hold it. The minimum threshold sits at 400 on a scale that runs to 1,000, and Amazon refreshes your score weekly against rolling three-month data.
A good IPI score in 2026 is 550 or better, not 401. Four components feed the number, and stranded inventory is the one to fix first because those units occupy space while sending Amazon no demand signal at all.
- Excess inventory percentage
- Sell-through rate over 90 days
- Stranded inventory percentage
- In-stock rate on your movers
How Does Storage Utilization Eat My Headroom?
Utilization is the brake. Amazon tracks how many weeks of cover you are holding, and slow volume gets expensive well before it gets restricted.
The surcharge kicks in around 22 weeks of cover and reaches $1.58 per cubic foot in the 44 to 52 week band. Aged inventory stacks on top, with surcharges starting at 181 days and climbing steeply past the one-year mark.
Forecast Inventory Using Custom Analytics
Amazon prices your restock limit off sales velocity, which makes your forecast only as good as the data behind it. Guessing demand costs you either way.
Under-forecast and you trip the low inventory level fee. Over-forecast and you hand Amazon the utilization data that shrinks next month’s cap.
Custom Analytics in Seller Central reports real traffic and ordered units at the level you actually plan at. Watch the breakdown below to see how that dashboard produces the numbers your next shipment plan should be built on.
Amazon Custom Analytics Gives You Extremely Accurate Reporting
The Difference Between Capacity Limits and Storage Limits
Sellers use “capacity limit” and “storage limit” interchangeably, and that habit costs them weeks of wasted effort. The two describe different mechanisms with different levers, even though Amazon now reports them as one monthly number.
| Capacity limit | Storage volume limit | |
|---|---|---|
|
Controls |
How much you can send and hold
|
How much space you are allowed
|
|
Measured in
|
Cubic feet, per storage type
|
Cubic feet, per storage type
|
|
Main driver
|
Sales forecast and velocity
|
Inventory performance index
|
|
Review cycle
|
Monthly, third week
|
Tied to IPI score checks
|
|
Extra space
|
Capacity Manager bidding
|
Raise your IPI above 400
|
|
Penalty for breaching
|
Overage fees plus blocked shipments
|
Tighter capacity next cycle
|
What Is an Amazon FBA Capacity Limit?
Your capacity limit caps the total volume you can send to and hold at Amazon’s fulfillment centers each month, set separately for every storage type. Amazon builds the number from your sales forecast, your inventory performance, and the space available across its network.
You get one confirmed limit for next month plus estimates for the two months after it. Capacity Manager lets you bid a reservation fee for additional space, and performance credits can offset that fee when the extra inventory actually sells.
How Do Storage Limits and Overage Fees Still Apply?
Storage limits did not disappear when Amazon unified the reporting; they moved underneath it. Your inventory performance index still governs how much volume Amazon will allocate you in the first place, which is why an IPI slide shrinks next month’s capacity.
Overage fees hit when on-hand volume passes the confirmed limit, calculated against the highest confirmed or estimated figure Amazon published for that period. The charge runs about $10 per cubic foot per month on everything above the line, so 200 cubic feet of overshoot becomes a $2,000 monthly problem.
We track headroom, IPI trend, and aged stock weekly so cuts stop catching you late.
What Happens if You Exceed the Amazon Capacity Limit?
Amazon blocks new shipment creation for that storage type until your volume drops back under the line. The fees and the knock-on damage start immediately.
- Blocked shipments, until on-hand volume falls below your limit
- Overage fees, charged per cubic foot on everything above the line
- Stockouts on movers, which cost organic rank as well as sales
- Stalled launches, since new products need headroom to land in
- A lower IPI, which tightens next month’s allocation further
That last point is what turns a bad month into a bad quarter. Falling sales shrink the forecast, the smaller forecast cuts your cap again, and the cycle feeds itself until you break it deliberately.
Will Amazon Freeze Your FBA Storage Capacity Limits in Q4?
Why Your Amazon FBA Capacity Limit Decreased
Why did your Amazon FBA restock limit drop this month? Work the diagnostic below before touching a purchase order, because the wrong fix costs you a full cycle.
| What you see | Likely driver | First move |
|---|---|---|
|
Cap fell, sales flat
|
Utilization climbed on slow SKUs
|
Removal orders on the bottom decile |
|
Cap fell after a soft month
|
Forecast dropped with velocity
|
Promotion or ad push on movers
|
|
Shipments blocked entirely
|
IPI crossed under 400
|
Clear stranded and excess units
|
|
One ASIN blocked, account fine
|
ASIN-level restock cap
|
Rebalance the SKU mix
|
|
Cap fell going into Q3
|
Network tightening before Q4
|
Move bulk upstream now
|
Why Did My Restock Limit Drop When My Sales Went Up?
Growth in units does not help when it came from SKUs that were already lean while your slow movers kept aging in the warehouse. Amazon scores the whole account, so a strong ASIN and a shelf of dead stock net out against each other.
Timing is the other cause, and it catches sellers who did everything right. Amazon locks the number in the third week, so a strong close to the month lands too late to count and shows up in the following cycle instead.
Why Can't I Create an FBA Shipment Right Now?
Check open shipments before you assume Amazon cut you. Every plan you created consumes capacity from the moment it exists, so shipments still sitting in your queue are already spending space you think you have.
Two other blocks look identical from the shipment screen. An ASIN-level cap stops one SKU while your account still shows room, and a storage type sitting at its own limit blocks that type even when the others have space to spare.
Warning Signals That Show Up Before a Cut
Capacity problems are visible weeks ahead if you know the number to watch. Add on-hand plus in-transit plus open shipments, divide by your confirmed limit, and call it headroom.
Run at 70 percent. Past 85 percent, you are one soft week away from a blocked shipment.
- Headroom above 85 percent with inbound still planned
- IPI down three straight weeks at any score
- Utilization moving past 18 weeks of cover
- Any SKU crossing 150 days in the network
- Estimated limits for month two trending down
Those two estimated months are your only advance notice. Amazon publishes on a schedule and never flags individual account changes, so a falling estimate is the alarm.
4 Ways to Tell if your Amazon Account Being Managed Properly
7 Strategies to Increase Your Amazon FBA Capacity Limit
Every strategy below works, but the order matters more than the list. Sequence these correctly and a typical recovery runs four to eight weeks instead of two full quarters.
1. Cancel Open Shipments You No Longer Plan To Send
Open shipments consume capacity the moment you create them, whether or not a box ever leaves your warehouse. Clearing stale plans from your shipping queue is the fastest free space you will find, and it takes an afternoon.
2. Fix Stranded Inventory First
Stranded units occupy cubic feet while generating no sales signal, so they drag your capacity and your inventory performance index down at the same time. Pull the stranded report, fix the listing errors behind it, and those units start earning their space back immediately.
3. Clear Aged and Excess Stock
Anything past 150 days with no realistic sell-through path is costing you space, surcharges, and next month’s allocation. Liquidation clears in roughly 30 days while removal orders can take three months, so pick based on how soon you need the room.
4. Buy Velocity on SKUs That Still Sell
Sell-through is the fastest-moving input Amazon reads, so discounts, outlet deals, and Brand Tailored Promotions on movers pay back in capacity as well as revenue. Thin margin on a clearance push beats full margin on inventory you cannot replenish.
5. Shift Slow Items to FBM
Merchant fulfillment keeps a listing live and its sales history intact without spending FBA cubic feet you do not have. Use it as a holding pattern on slow standard-size products while the rest of the cleanup runs.
6. Send Smaller, More Frequent Shipments
Fifteen days of cover every two weeks holds far more headroom than one 60-day shipment sitting in a fulfillment center. The pattern also signals active inventory management to the same forecast that sets your next limit.
7. Bid in Capacity Manager When the Math Works
Amazon grants requests from the highest reservation fee per cubic foot down, then returns $0.15 in performance credits for every dollar of FBA sales from that space. A $0.30 bid on 500 cubic feet costs $150 and needs $1,000 in sales to break even, so bid only on inventory you know moves.
For a step-by-step guide, check out this video tutorial from our Amazon agency on how to request more inventory space using the Capacity Manager:
How to Request More Inventory Space at Amazon FBA: Capacity Manager Walkthrough
How To Plan Inventory So You Don't Stock Out or Overbuy
Plan to a corridor, not a target. Amazon penalizes both ends now, so the job is staying between two fee walls rather than hitting one perfect number.
The floor is the low inventory level fee at 28 days of supply, and the ceiling is the utilization surcharge around 22 weeks. That leaves a working range of roughly four to twenty weeks of cover per SKU, and our guide to stockouts and overstock covers the reorder mechanics in full.
Solving Inventory Problems to Drive Growth
FAQs About Amazon FBA Capacity Limits
Your Cap Is a Number You Control
The Amazon FBA restock limit behaves like a credit score rather than a rulebook. Velocity sets the dial, your inventory performance index gates the storage volume, and utilization pulls the brake.
Sellers who stay in stock through Q4 are not luckier than everyone else. They watch headroom, estimated limits, and aged stock weekly instead of reacting after a shipment gets rejected.
Are you losing sales to a capacity limit that keeps shrinking? Contact our full-service Amazon agency and let our experts audit your inventory health, recover your capacity, and keep your movers in stock.
We audit your capacity, inventory performance index, and restock cadence at no cost.
