Most lists of Amazon FBA mistakes treat every item as equally urgent, which is why they are hard to act on. Overpaying for shipping and getting your account deactivated are both mistakes. They are not the same size of mistake.
So this one is ordered by consequence: what ends a business, what wastes a launch, what costs margin, and what barely matters despite being on every list ever written.
I’d read the first tier properly and skim the rest. In our experience the sellers who fail almost never fail on tier three.
Tier 1: the mistakes that end the business
Rare, and the only ones with no recovery path worth relying on.
Sourcing goods you cannot document. In our experience the single most expensive error available to an Amazon seller, and the one people underrate most consistently. When a counterfeit or inauthentic complaint lands, Amazon asks for invoices from the brand or an authorized distributor, and a supply chain that cannot produce them ends the ASIN and sometimes the account. Retail receipts and marketplace purchases do not survive this. Our guides to where to buy products to sell on Amazon and to appealing a policy violation cover both halves.
Touching review incentives. My most absolute view on this page. Paid reviews, review swaps, refund-for-review arrangements, inserts asking for positive feedback. Detection is better than sellers assume, and reinstatement after a manipulation finding is among the hardest cases there is. No ranking gain survives losing the account. Our guide on getting paid for Amazon reviews covers where the line sits.
Running a second account without permission. Amazon links accounts through banking, addresses, devices and networks, and the usual way a recoverable suspension becomes permanent is a second account opened in week two out of frustration. Our guide on a suspended seller account covers what to do instead.
Ignoring an account health warning. I’d check the dashboard weekly and I’d treat that as non-negotiable. Deactivation is rarely a surprise from Amazon’s side. The metrics drift visibly for weeks first. What makes it a surprise is not looking.
Tier 2: the mistakes that waste a launch
Far more common, survivable, and they cost real money.
Choosing the product badly. I’d call this the mistake that causes most of the others, because everything downstream inherits it. Picking something because a tool showed high volume, entering a category held by entrenched brands with review counts you cannot match, or falling for a product whose margin only works at a volume you will not hit. Our FBA product research checklist runs the sequence in cost order, cheapest checks first.
Getting the numbers wrong before ordering. Referral fees, fulfillment fees, storage, returns, advertising, freight, duty. I’ve found most sellers model three of those and then order inventory. Run it properly with our guide to calculating FBA profit margin before committing money, not after.
Budgeting for one inventory order. Your reorder has to be paid for before the first batch has finished paying you back. More launches die in that squeeze than at the starting line, which our guide to the cost of starting an FBA business goes through.
Expecting advertising to work immediately. Campaigns killed in week one teach you nothing and cost the same as campaigns that ran long enough to learn from. Our guide on how long Amazon PPC takes to work sets the realistic timeline.
Listing before the listing is ready. I’d wait. Going live with placeholder images and thin bullets to “get started” begins accumulating a conversion history you then have to overcome. Early data follows a listing around.
Tier 3: the mistakes that quietly cost margin
Unglamorous, ongoing, and collectively larger than tier 2 over a year.
Running out of stock. The one I’d watch hardest of this tier. Inventory is a ranking input in a way it is not on any other platform. Going out of stock costs position immediately and the recovery takes longer than the outage did. Our guide to Amazon inventory management covers the cover calculation worth running weekly.
Overstocking the other way. Storage fees and aged inventory surcharges quietly eat the margin on anything that sells slower than planned.
Bad identifiers. Barcodes bought cheaply from resellers fail Amazon’s check against GS1, often years later, and fixing the identifier on a live listing is a support case rather than an edit. Our guide to UPC codes explains why the cheap ones detonate late.
Listing errors left unfixed. Suppressed and inactive listings sit there earning nothing while you look at aggregate revenue and see a gentle decline. Our guide to Amazon listing errors covers diagnosing and preventing them.
Prep and packaging failures. Non-compliant shipments get charged a prep fee per unit or refused outright, and the fees are small enough individually to be ignored and large enough in aggregate to notice. Our guide to FBA packaging requirements covers the rules that actually get enforced.
Never reading the search term report. The cheapest win on this page, in my experience. You are paying for the data whether or not you read it, and it tells you what shoppers actually typed. Our guide to the advertising search term report covers what to do with it.
Not registering the brand. If you own a trademark and have not enrolled in Brand Registry, you are declining free control over your own listings plus A+ Content and enforcement tools. Rarely urgent, always worth doing.
Tier 4: the ones on every list that barely matter
Worth naming so you can stop worrying about them.
Shipping cost presentation. Almost everything is Prime now, so I’d ignore this entirely. This item is a holdover from a marketplace that no longer exists.
Not using every available module or feature. I’d resist it. Filling every slot is not a strategy. A tight listing beats a padded one.
Posting to social media about your products. Fine to do. Rarely the constraint, and never the reason a product failed.
Perfecting the description. Buyers on mobile mostly do not reach it, which surprises people who spent a weekend on theirs. Spend that hour on the main image instead.
The mistake underneath the other mistakes
Having consolidated four separate articles on this topic into this one, a pattern is hard to miss: nearly every item above is a sequencing error rather than a knowledge error.
People know product research matters. They do it after finding a product they like. People know the numbers matter. They run them after the sample arrives. People know listings matter. They fix them after launching.
The mistakes are almost never things sellers did not know. They are things done in the wrong order, because the exciting steps come early and the tedious ones feel postponable. I’d take that as the actual lesson here, ahead of any individual item.
What I’d do differently if starting again: spend the first month exclusively on arithmetic and supplier verification, with nothing bought. It is the least satisfying month available and it removes most of tier 1 and tier 2 outright.
We manage Amazon accounts for client brands as an Amazon Ads verified partner and an Amazon SPN Verified Partner, and the tiering above reflects which of these we spend time undoing rather than which are most talked about.
FAQ
What are the most common Amazon FBA mistakes?
By frequency: poor product research, underestimating total costs before ordering, running out of stock, leaving listing errors unfixed, and judging advertising too early. By consequence, a different list entirely: undocumented sourcing, review manipulation and operating a second account, which can end the business rather than cost it money.
What is the biggest mistake new Amazon sellers make?
Sequencing. Nearly every common failure is something the seller already knew mattered but did in the wrong order, typically finding a product they like and then doing the research, or launching and then fixing the listing. Early data follows a listing permanently, so the order genuinely matters.
What mistakes get an Amazon seller account suspended?
Sourcing goods whose supply chain you cannot document with invoices from the brand or an authorized distributor, any form of review manipulation, operating an unauthorized second account, and ignoring account health metrics until they cross a threshold. These are the four with no reliable recovery path.
What mistakes do sellers make when choosing products?
Selecting on search volume alone, entering categories held by brands with review counts that cannot be matched, accepting a margin that only works at optimistic volume, failing to verify the supplier, and not costing freight and duty before committing. Running the checks in cost order means the expensive ones only ever happen on products that survived the cheap ones.
Are Amazon FBA fees a common mistake?
Miscalculating them is, yes. Sellers commonly model the referral and fulfillment fees and omit storage, returns processing, advertising, freight and duty, which is enough to turn a viable product into a loss-making one. Run the full calculation before ordering rather than after the first invoice.
How do I avoid Amazon FBA mistakes as a beginner?
Spend the first month on arithmetic and supplier verification with nothing bought. That single habit removes most of the account-ending and launch-wasting mistakes, since both tiers trace back to committing money before the checks were done.
Last updated: September 21, 2026. This page consolidates four earlier articles on Amazon seller mistakes into one. Amazon’s policies, fees and enforcement thresholds change, so confirm current rules in Seller Central.
