Common Carrier Billing Errors That Cost Ecommerce Brands Thousands

Carriers calculate dimensional weight using package dimensions (L × W × H ÷ divisor). When they measure incorrectly — or use outdated package profiles — they charge a higher weight than actual. This is the single most common overcharge in ecommerce shipping.

The same surcharge applied twice to a single shipment — often residential delivery fees, fuel surcharges, or handling charges. These typically occur during carrier system updates or when packages are re-routed.

Carriers guarantee delivery by specific dates for express and ground services. When they miss the guaranteed window, you're entitled to a full refund of shipping charges — but carriers almost never issue these automatically.

Carriers determine shipping cost partly by zone — the distance between origin and destination. When the origin ZIP is incorrect in their system, or when zone tables aren't updated, every package to that destination is overcharged.

Carriers charge a residential delivery surcharge for home addresses. But their address databases aren't perfect — businesses in mixed-use buildings, home offices, and commercial addresses in residential areas are frequently misclassified.

Charges for services you didn't request: address corrections, delivery area surcharges, signature required fees, or Saturday delivery premiums applied to standard shipments.

Carriers impose peak/demand surcharges during holiday seasons (typically Nov–Jan). Some billing systems fail to remove these surcharges after the peak window ends, continuing to charge elevated rates into February and beyond.

Fuel surcharges are calculated as a percentage based on weekly fuel index prices. Errors occur when outdated fuel indices are applied, when the wrong service tier's fuel rate is used, or when fuel surcharges are applied to charges that should be exempt.