The deal was perfect
By Steven Pope · September 13, 2026 · Curated by George's Blog
The deal was perfect
The ads were live
The shelf was empty
That's how brands lose Prime Big Deal Days
Before the first shopper even clicks
Inventory is the one lever you can't fix mid event
You can change bids in minutes
You can change prices in an hour
You can't rush a shipment sitting in FBA receiving
Because you finally started to panic
Plan backward from the event
Not forward from today
Pull your sales velocity from the last big deal event
Apply that lift to each ASIN
Then add the time Amazon actually takes to check in
Inventory during peak season
That window stretches right when every other seller is shipping too
Check your FBA capacity limits before
You place the purchase order
Buying units Amazon won't let you send
is just renting a very expensive shelf
The real cost of a stockout isn't the lost sale. It's the damage after
Your Amazon PPC campaigns stop serving
Your organic rank and Best Seller Rank slide
While competitors collect the clicks you paid to earn
Winning that rank back costs more than the inventory ever would have
Build a backup plan
Keep reserve units in AWD
A third party warehouse ready to refill FBA
Set up FBM as a safety net so a sold out ASIN stays buyable
Don't overcorrect either
Run too lean and Amazon can charge you a low inventory level fee
Overstock and aged inventory surcharges
will eat the margin you made on the deal
Hold what Black Friday, Cyber Monday
and the holiday rush will actually move
Amazon inventory planning isn't a warehouse task
It's a revenue strategy
Q4 winners are decided in September not October