Amazon’s fee structure is deliberately complex. Apparel return rates run 20–35%. Supplier terms negotiated in year one rarely get renegotiated. PPC spend grows to maintain revenue that should be organic. By the time all of it is layered together, most brands are operating on a fraction of the margin they think they have.
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The Amazon Cost Stack
FBA fees, referral fees, PPC spend, return processing, storage charges — each calculated separately, never seen together at the SKU level. Running a true per-unit P&L across every cost layer takes time — and the picture that emerges is almost always more complex than the dashboard suggests.
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Returns Eating Contribution
Apparel averages 25% return rates industry-wide. Shoes run over 30%. Each return carries a reverse logistics cost, a restocking cost, and a potential write-off. Returns are typically tracked as a blended category cost — diagnosing which specific SKUs are driving the rate, and why, is where the real leverage sits.
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Supply Chain Cost Untouched
Factory terms set years ago. MOQs that force over-inventory. Freight costs that have never been renegotiated. Landed cost that has drifted with tariff changes nobody modeled. The supply chain side of the margin equation is where the largest untapped leverage usually sits.
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PPC Masking Organic Decay
Ad spend grows quarter over quarter to maintain rankings that should be organic. Remove the spend and revenue drops — which means the brand is renting its own sales velocity. The true cost of that dependency rarely appears in any report the brand sees.
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SKU Proliferation
Every color, every size run, every seasonal variation is a separate inventory commitment. Capital tied up in the wrong colorways, dead sizes that will never sell through, and photography and listing costs that accumulate across a catalog nobody has rationalized.
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Pricing Architecture Misaligned
Price points set by competitive benchmarking rather than cost structure. Promotions that train customers to wait. Coupons with no expiration date that became structural discounts. The price at which a product sells is rarely the price at which it is profitable.