Most brands launch on Amazon with a spreadsheet showing 40% margins. Six months later, they're wondering where the profit went.
It didn't disappear. Amazon took it. Legally. Through a fee structure so layered that most sellers don't fully understand it until they're bleeding cash.
Let's fix that. Here's every Amazon seller fee explained—the full cost stack for 2025—so you can engineer margins before launch, not scramble to find them after.
The Professional Seller Account: Your Entry Fee
$39.99/month. Non-negotiable if you're serious.
The Individual plan charges $0.99 per sale instead. Do the math: if you sell more than 40 units a month, Professional wins. But that's not the real reason you need it.
Professional unlocks advertising, Brand Registry eligibility, bulk listing tools, and API access. Without it, you're playing a different game entirely. One you'll lose.
Referral Fees: Amazon's Cut of Every Sale
This is the big one. Amazon takes a percentage of every sale, and it varies by category:
- Most categories: 15%
- Apparel and accessories: 17%
- Consumer electronics: 8%
- Grocery: 8-15% (tiered by price)
- Jewelry: 20% (on items over $250)
- Amazon device accessories: 45%
For most product brands, assume 15%. That's $4.50 on a $30 product. Every single sale. Forever.
Some sellers try to game categories. Don't. Amazon's algorithms catch miscategorization, and the penalty is account suspension. Not worth it.
FBA Fees: The Fulfillment Tax
Fulfillment by Amazon is why most brands use Amazon in the first place. Two-day shipping. Prime badge. Customer trust. But it costs.
FBA fees depend on size and weight. For a standard small item (under 1 lb), you're looking at $3.22 minimum. A 2 lb item? $5.90. Large and heavy? $10+ easily.
Here's where it gets interesting. Amazon updated their fee structure in 2024 and again in 2025. They split out "inbound placement" as a separate fee. If you send inventory to a single warehouse instead of distributing it yourself, you pay extra. Could be $0.27-$1.58 per unit depending on size.
Translation: Amazon wants you to do more logistics work. Or pay them to do it.
For a typical $30 product weighing 1.5 lbs, expect $5-7 in total FBA fees. That's another 17-23% of revenue.
Storage Fees: The Slow-Moving Inventory Penalty
Amazon charges monthly storage fees based on cubic footage:
- January-September: $0.78 per cubic foot (standard)
- October-December: $2.40 per cubic foot (standard)
Seems manageable. Until you add aged inventory surcharges.
Inventory sitting 181-270 days? Extra $1.50 per cubic foot. 271-365 days? $3.80. Over a year? $6.90 per cubic foot per month, plus an additional $0.15 per unit.
This is how brands accidentally burn thousands. They order too much inventory based on optimistic projections, sales slow down, and Amazon's storage fees compound until removal or liquidation is the only option.
For a well-run account with 60-day inventory turnover, storage adds 1-2% to your cost stack. For a poorly managed one? 5-10% or worse.
Return Processing Fees: When Customers Change Their Mind
Amazon charges you when customers return products. For most categories, this equals the original fulfillment fee. For apparel and shoes, it's a bit less.
Your return rate varies by category. Electronics? 5-8%. Apparel? 15-30%. Supplements? 3-5%.
Here's what most sellers miss: you also lose the referral fee on returns. Amazon refunds it, but that refund takes 60 days. Cash flow matters.
Budget 2-5% of revenue for return-related costs. Higher if you sell clothing or anything with fit/sizing concerns.
Advertising: The Hidden Necessity
Technically optional. Practically mandatory.
We run PPC for dozens of brands using our PPC Lifecycle Framework. Here's what we see: new products need 15-25% of revenue going to advertising during launch. Mature products settle at 8-12%.
Those numbers assume you're doing it right. We've audited accounts burning 40%+ on ads because they're targeting the wrong keywords, bidding on broad match, or haven't touched their campaigns in months.
When Blue Forest Holdings came to us, they were spending aggressively but unprofitably. Within 12 months, we doubled their revenue and tripled their profit—largely by restructuring their ad spend. TACoS went from destructive to sustainable.
Budget 10-15% for advertising as a baseline. Accept that this is a cost of doing business on Amazon, not an optional extra.
Brand Registry and Additional Programs
Brand Registry itself is free. But the programs it unlocks aren't:
- A+ Content: Free (but requires creative investment)
- Amazon Vine: $200 per parent ASIN for up to 30 reviews
- Subscribe & Save: 5-15% discount you fund
- Coupons: $0.60 per redemption plus the discount
- Lightning Deals: $150-500 per deal plus the discount
None of these are required. All of them improve conversion when used strategically. Budget 1-2% for promotional programs if you're running them consistently.
Amazon Seller Fees Explained: The Full Stack
Let's add it up for a typical product. Assume a $30 item with 1.5 lbs weight, 60-day inventory turnover, 5% return rate, and 12% advertising spend:
- Referral fee (15%): $4.50
- FBA fulfillment: $5.50
- Inbound placement: $0.50
- Storage (prorated): $0.30
- Return processing (5% × $5.50): $0.28
- Advertising (12%): $3.60
- Professional plan (prorated): $0.10
Total Amazon fees: $14.78 per unit
That's 49% of your $30 sale price. Gone before you account for COGS, shipping to Amazon, or your own overhead.
If your landed COGS is $8 (27%), you're left with $7.22 contribution margin. That's 24%.
Most brands don't do this math before launch. They see 15% referral and think they're fine. They're not.
Why Margin Engineering Happens Before Launch
Once you're on Amazon, your levers are limited. You can optimize ads. You can reduce returns with better listings. You can negotiate slightly better FBA rates at scale.
But you can't change your COGS without reformulating. You can't change your size and weight without redesigning packaging. You can't change your category without changing your product.
Revenue is vanity. Contribution margin is sanity.
We see brands doing $3M annually on Amazon with worse economics than brands doing $500K. The $3M brand launched without margin engineering. The $500K brand did the math first.
Our Revenue Rescue Decision Tree starts with contribution margin analysis for exactly this reason. When a brand comes to us with declining profit, the first question isn't "what's wrong with your ads?" It's "what's your true unit economics?"
Sometimes the answer is: this product doesn't work on Amazon at this price point. Better to know that before you've burned six figures.
The Fees Most Sellers Forget
Beyond the standard stack:
- Removal/disposal fees: $0.97-$13.05 per unit when inventory needs to leave
- Labeling fees: $0.55 per unit if Amazon applies barcodes
- Manual processing fees: $0.15 per unit for non-partnered carrier shipments
- Long-term storage: Mentioned above, but often forgotten until the bill arrives
- Refund administration: Amazon keeps $5 or 20% of the referral fee (whichever is less) on refunds
These add 1-3% for most brands. Not huge individually. Significant in aggregate.
What Good Looks Like
Brands that thrive on Amazon share common traits:
- 30%+ contribution margin after all Amazon fees and COGS
- 8-12% TACoS at maturity
- Sub-90-day inventory turnover
- Return rates at or below category average
- Price point that absorbs fee increases without margin destruction
NumNum Baby hit these benchmarks and grew from $100K to $3M in 18 months before an 8-figure exit. The margins were there from day one. We just scaled them.
Work With OBG
If you want to see how this would work for your brand, book a free strategy session. We'll audit your account, identify the fastest wins, and map out exactly how we'll execute. And if we don't increase your profitability in the first 30 days, you don't pay. Zero risk.