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E-commerce sellers lose 2-3% of gross payment volume to undetected marketplace fee errors — wrong commission categories, weight overcharges, and unreversed return fees.
Decompose each settlement into commission + shipping + TCS + TDS + returns. Compare commission rate against product category master. Validate volumetric weight against actual weight. Verify return fee reversals within 90-day SAFE-T window.
Commission rates 2-22% by category, volumetric weight formula L×W×H/5000, SAFE-T claim window 90 days, settlement report retention 90 days, TCS at 0.5% on net taxable supplies.
Fee variance report by error type, overcharge recovery claims with SAFE-T filing support, and monthly settlement reconciliation with order-level P&L.
A seller processing 500 orders per day across Amazon, Flipkart, and Meesho receives settlement reports with 15-20 different fee line items per order. Commission rates, shipping charges, closing fees, fixed fees, TCS deductions, and return adjustments are each computed independently by the marketplace. When any one of these calculations is wrong, the error repeats across every affected order until the seller identifies it. Most sellers never do.
What a Marketplace Fee Audit Involves
A marketplace fee audit is the systematic comparison of fees charged in settlement reports against the applicable fee schedule for each order. The audit covers referral commission rates by category, shipping and weight charges, closing fees, fixed fees, return-related fee reversals, and TCS computations. The objective is to identify systematic overcharges that reduce the seller’s net realisation per order.
The challenge is scale. A seller with 15,000 orders per month across three marketplaces generates 45,000 order-level fee records. Settlement reports are retained by marketplaces for only 90 days, making proactive download and archival essential for any retroactive audit.
Where Fee Errors Occur
Commission Category Misclassification
Amazon and Flipkart referral commission rates range from 2% to 22% depending on the product category. A product listed under “Electronics Accessories” at 10% commission that the marketplace system classifies under “Computers and Accessories” at 5.5% creates a systematic variance on every order. The reverse is more common and more costly: a lower-commission product classified into a higher-commission category. Sellers with 200+ SKUs across multiple categories are most exposed to this error.
Volumetric Weight Overcharges
Marketplaces compute shipping charges using the higher of actual weight or volumetric weight (L x W x H / 5000). A packaging discrepancy of 10 grams can push an order into the next weight slab, adding ₹15-30 per shipment. Across 10,000 shipments per month, a systematic 10-gram overstatement costs ₹1.5-3 lakh monthly. Sellers must verify the weight recorded in the settlement report against actual dispatch weight, which requires maintaining dispatch-level weight logs.
Return Fee Reversal Failures
When a customer returns an order, the marketplace should reverse the commission, closing fee, and shipping charge. In practice, reversals are often incomplete. Amazon’s November 2025 policy change stopped reimbursing closing fees on returned orders. Refund administration fees are retained even on legitimate returns where the seller was not at fault. Each unreversed fee is typically ₹20-50 per order, but at 8-12% return rates on fashion and lifestyle categories, the aggregate impact is significant.
TCS Calculation Errors
Section 52 of the CGST Act requires marketplaces to collect TCS at 1% (0.5% CGST + 0.5% SGST for intra-state, or 1% IGST for inter-state). The computation base must be the net value of taxable supplies excluding GST. Errors occur when TCS is computed on the gross value including GST, or when the intra-state vs. inter-state classification does not match actual delivery geography.
Marketplace Fee Audit Reference
| Fee Type | Error Pattern | Typical Impact per Order | Audit Data Source |
|---|---|---|---|
| Referral commission | Wrong product category applied | ₹20-200 | Settlement report vs. fee schedule |
| Shipping / weight | Volumetric weight exceeds actual | ₹15-30 | Settlement report vs. dispatch weight log |
| Closing fee | Not reversed on return | ₹20-50 | Return report vs. settlement adjustments |
| Fixed fee | Charged on cancelled orders | ₹5-25 | Cancellation report vs. settlement |
| TCS | Computed on gross including GST | 0.1-0.3% of order value | TCS certificate vs. GSTR-8 |
| Refund admin fee | Retained on seller-faultless returns | ₹10-30 | Return reason report vs. fee reversal |
Recovery Mechanisms and Deadlines
Amazon SAFE-T (Seller Assurance for E-commerce Transactions) claims have a 90-day filing window from the date of the disputed transaction. The process requires supporting documentation within 3 days of an information request, and sellers get one appeal within 7 days of a denial. An active A-to-Z guarantee claim on the same order takes precedence and blocks SAFE-T filing.
Flipkart sellers must raise disputes through the seller dashboard within the settlement dispute window, which varies by seller tier. Settlement reports for both platforms are available for download for only 90 days, so finance teams must automate report downloads to preserve audit trail continuity.
For sellers managing settlements across multiple marketplaces, payment gateway reconciliation tooling that unpacks lump-sum bank credits into order-level components is essential. Manual VLOOKUP matching achieves approximately 51% match rate on settlement data; reconciliation software India-wide deployments with structured matching improve this to 88% by applying order ID, UTR reference, and amount-based multi-signal matching across settlement reports.
Fee schedules, settlement report formats, and SAFE-T claim procedures are available on Amazon Seller Central India.