How to Verify Amazon FBA Weight Handling Charges

What you are actually verifying

A weight handling charge is one component of the fulfilment fee. It depends on the size or weight tier Amazon assigns to your product and the shipping weight it uses for that tier. Your job is not to guess the rate. It is to confirm three things for every SKU:

• The dimensions and weight Amazon holds in its catalogue match the packed product.
• The tier or slab applied is the one the current rate card prescribes for those measurements.
• The amount deducted in your settlement equals that slab's rate for the units shipped.

The rate card and the rule for computing chargeable weight (for example, whether volumetric weight is considered) change from time to time. Always read the latest fee schedule in Seller Central and your agreement rather than relying on an old blog post or a spreadsheet from last year.

Gather the right documents first

Before you recompute anything, collect these in one folder:

• The current FBA rate card and any fee-change notices applicable to your review period.
• Your fee preview or fulfilment fee report and the settlement report for the same dates.
• Your SKU master with actual packed weight and length, breadth and height, as measured by you.
• The product dimensions and weight currently shown in Amazon's catalogue or inventory records for each SKU.

Use one date range and one set of fee terms. Mixing periods across a rate revision is the commonest reason an audit shows false errors.

Step-by-step: recompute the charge

1. List SKUs by fee impact. Sort by units shipped multiplied by fee per unit, so you start with SKUs that matter most.
2. Measure and weigh a sample. Take a packed unit as it ships to the fulfilment centre. Record dead weight and dimensions to the precision Amazon uses.
3. Compare with Amazon's record. Note any SKU where catalogue weight or size is higher than your measurement.
4. Derive the chargeable weight. Apply the method stated in the current fee schedule to your own measurements.
5. Look up the slab. Find the tier and rate for that weight in the rate card for the shipment dates.
6. Match to the settlement. Pull the fee line per order or per unit and compare it with your expected fee.
7. Record variances by SKU, order ID, units and rupee difference.

Do this per SKU, not on the total. Totals hide errors that cancel out.

Common reasons the numbers do not match

• Outdated or wrong catalogue dimensions, often from a listing created with approximate measurements.
• Packaging changes that increased size after the listing was set up.
• Bundles or multipacks listed with the single-unit weight, or the opposite.
• Rate revision timing, where part of the period falls under old rates.
• Slab boundary cases, where a few grams push a unit into the next tier.
• Returns and re-shipments that create extra fee lines for the same order.

Group variances by cause. If one cause explains most of them, fixing the catalogue data may prevent the issue going forward.

Raise the dispute with evidence

If your recomputed fee is lower than the charged fee, open a case through Seller Central support. Include:

• SKU, ASIN, order IDs and the date range affected.
• Photos of the packed product on a scale and with a measuring tape.
• The catalogue values Amazon shows versus your measured values.
• The rate card page and slab you believe applies.
• Your calculation of the difference.

Ask for the dimensions to be corrected and for a refund of past overcharges for the affected period. Whether and how far back Amazon will adjust depends on its current policy and your terms, so confirm that in your agreement or with your account manager. Log each case with its ID, date raised, amount claimed and outcome.

Turn it into a monthly routine

One-time audits find old errors; a routine stops new ones. Re-check weight and size data whenever packaging changes or a new SKU goes live, and recompute fees on the top SKUs every settlement cycle. Keep a single sheet that ties SKU, tier, expected fee, charged fee and case status together.

If manual checking is becoming heavy, a tool such as MarketplaceMetrics by Fundle is built to check fees against agreed terms and track recovery cases. It currently reviews Myntra Excel reports, and Amazon coverage would be a scope discussion, so confirm fit before relying on it for FBA.