Last mile delivery refers to the final leg of a shipment’s journey — from a distribution hub or carrier facility to the end customer’s door. Despite covering the shortest geographic distance, the last mile is typically the most expensive, time-intensive, and complex segment of the entire supply chain, accounting for 40-53% of total shipping costs in many analyses.
Why Last Mile Is So Expensive
Last mile costs are high because deliveries are geographically dispersed — a single driver may make 100+ stops in a single route, covering many miles between deliveries. Factors that drive up last mile cost include:
- Failed delivery attempts: When no one is home to receive a package, the carrier must reattempt delivery or hold for pickup — adding cost without revenue.
- Residential surcharges: Carriers charge premium rates for deliveries to residential addresses vs. commercial locations.
- Delivery area surcharges: Additional fees apply for deliveries to rural or extended areas far from carrier hubs.
- Route density: Low-density areas require more miles driven per stop, increasing cost per delivery.
Last Mile Carrier Options
Major parcel carriers (UPS, FedEx, USPS) handle the vast majority of e-commerce last mile delivery. Regional carriers (LSO, OnTrac, Spee-Dee, LaserShip/Axlehire) can offer competitive rates in their service areas. USPS-final-mile programs — such as FedEx SmartPost and UPS SurePost — inject parcels into the postal system for final delivery at lower cost but with longer transit times.
Optimizing Last Mile Costs
Strategies to reduce last mile costs include: carrier mix optimization (matching carrier to geography and service need), zone skipping (shipping inventory closer to end customers to reduce zone-based pricing), delivery density improvement (batching deliveries by address proximity), and delivery time window narrowing (reducing failed delivery attempts through customer notification and scheduling).