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5 Amazon Seller Mistakes That Cost Thousands in 2026

March 31, 2026By Profit Scanner Team
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1. Ignoring the New Inbound Defect Fees

This is the most expensive new mistake in 2026. Amazon increased inbound defect penalties from €0.02–€0.07 per unit to €0.32–€5.72 per unit — a 10x to 80x increase.

Combined with the elimination of FBA Prep services, the responsibility is 100% on you. A 1,000-unit shipment with labeling errors can generate a €5,720 penalty.

Fix: Invest in quality prep — whether in-house or through a reliable 3PL. Double-check FNSKU labels, poly bags, and suffocation warnings before every shipment.

2. Calculating Profit Wrong

New sellers see a product at €10 from a supplier selling at €25 on Amazon and think €15 profit. The reality:

  • Referral fee: €2.50–€3.75 (10–15%)
  • FBA fulfillment: €2.50–€5.00
  • Inbound shipping: €0.50–€1.50
  • Storage fees: €0.30–€1.00
  • Returns (5–10% rate): €0.50–€1.00 average
  • VAT on fees: varies by country

That €15 profit is actually €3–€5 before VAT. Many products that look profitable at first glance are break-even or losses.

Fix: Always use a scanner that calculates ALL fees including VAT. Profit Scanner factors in referral fees, FBA fees, storage, and country-specific VAT rates automatically.

3. Buying Before Checking Selling Eligibility

Amazon gates categories and specific brands. Buying 500 units of a gated product means your capital is stuck in unsellable inventory. In 2026, more brands maintain whitelists of approved sellers.

Fix: Check eligibility in Seller Central BEFORE purchasing. Use the Add a Product tool to verify you can list every ASIN.

4. Underestimating IP Complaints

Just 1–2 IP complaints can trigger an account suspension. Suspensions rose 12% in 2026. If a brand files an IP complaint, Amazon can destroy your FBA inventory without reimbursement.

Fix: Research brands before buying. Keep invoices from legitimate distributors. Tools like Profit Scanner flag known IP-complaint brands automatically.

5. Ignoring GPSR Compliance

Amazon now automatically suppresses listings without complete GPSR data. A seller with 500 non-compliant listings loses all those sales overnight.

Fix: Verify GPSR compliance for every product before sending to FBA. Most established EU brands already comply — but imported products often do not.