Amazon FBA Fee Overcharge: How to Detect and Get Reimbursed

 Amazon charges fba fee overcharge (FBA) fees based on product size, weight, and category. However, Amazon sometimes overcharges sellers due to incorrect weight/dimension calculations. If Amazon misclassifies your product, you could be paying higher fulfillment fees than necessary.

This guide explains how to check for FBA fee overcharges, request corrections, and file reimbursement claims to recover lost profits.

1. What is an FBA Fee Overcharge?

Amazon determines FBA fees based on:
✅ Product size tier (standard-size vs. oversized)
✅ Product weight (including packaging)
✅ Dimensional weight (DIM weight) (length × width × height ÷ 139)

If Amazon records incorrect product dimensions or weight, they may charge a higher FBA fee than necessary.

📌 Example of an Overcharge:

  • Your product’s actual weight: 10 oz
  • Amazon incorrectly classifies it as: 2 lbs
  • Correct FBA fee: $3.72
  • Amazon charges you: $5.42
  • Overcharge per unit: $1.70

If you sell 1,000 units per month, that’s $1,700 in lost profits!

2. How to Check If Amazon Overcharged You

Step 1: Find Your Current FBA Fees

  1. Go to Seller Central > Reports > Fulfillment > Fee Preview Report
  2. Look for the Estimated FBA Fees for each ASIN
  3. Compare Amazon’s recorded weight and dimensions with your actual product specs

Step 2: Verify Product Size Classification

Amazon assigns products to size tiers that determine the FBA fee.

Size TierMax WeightMax Dimensions (inches)
Small Standard16 oz15 × 12 × 0.75
Large Standard20 lbs18 × 14 × 8
Small Oversize70 lbs60 × 30 × 130

If your product is incorrectly classified, you’re paying more than necessary.

Step 3: Compare with Amazon’s FBA Fee Calculator

Use the Amazon FBA Fee Calculator to estimate the correct fee for your product:
🔗 Amazon FBA Fee Calculator

3. How to Request an FBA Fee Review

If Amazon is overcharging FBA fees, you can request a product re-measurement and reimbursement.

Step 1: Gather Evidence

✔ Actual product weight & dimensions (use a scale & measuring tape)
✔ Manufacturer specs (if available)
✔ Screenshots from the Fee Preview Report

Step 2: Submit a Reimbursement Request

  1. Log in to Seller Central
  2. Go to Help > Get Support
  3. Select Selling on Amazon > Fulfillment by Amazon
  4. Click Incorrect FBA Fee Charges
  5. Request an FBA fee re-measurement and attach your evidence
  6. Submit the case

Step 3: Follow Up on the Claim

  • Amazon typically responds within 7-14 days
  • If denied, reopen the case with additional proof
  • Check the case status in Seller Central > Case Log

📌 Tip: If Amazon confirms an overcharge, they will adjust your FBA fees going forward and may issue a reimbursement for past overcharges.

4. Time Limit for FBA Fee Reimbursements

Reimbursement TypeTime Limit
FBA fee overcharge90 days

💡 Tip: Check your Fee Preview Report every month to catch overcharges before the deadline.

5. Automating FBA Fee Audits

Manually tracking FBA fee overcharges can be time-consuming. Use tools to automate fee audits and reimbursement claims:

✅ Helium 10 Refund Genie – Detects incorrect FBA fees
✅ Seller Locker – Automates claims for incorrect fulfillment charges
✅ AMZ Refund – Identifies overcharges and files claims

These tools save time and help recover lost profits.

6. Final Thoughts

Amazon’s FBA fee overcharges can cost sellers thousands of dollars per year. To protect your profits:

✔ Regularly check your FBA fees for incorrect size/weight classifications
✔ Submit a re-measurement request if Amazon is overcharging you
✔ File a reimbursement claim to recover past overcharges
✔ Use automation tools to detect fee discrepancies faster

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