Last-mile delivery is the final leg of the shipping process, in which an order moves from the last sorting depot, store or micro-fulfillment site to the customer’s address, a parcel locker or a pickup point. In orders & fulfillment, it is the step the customer actually sees, and it is widely regarded as the most expensive and least efficient part of e-commerce logistics per parcel.
The term does not refer to a literal mile. Depending on the region, the last mile can span a few hundred meters in a dense city or dozens of kilometers in rural areas. What defines it is the shift from consolidated bulk transport between hubs to individual stops, each with its own address, time window and delivery outcome.
How last-mile delivery works
Last-mile delivery starts when parcels arrive at a local delivery station and ends with a confirmed handover. The process combines physical sorting with software for routing, communication and proof of delivery.
- Inbound sortation: parcels from line-haul trucks are scanned and sorted by delivery route.
- Route planning: software sequences stops by address, time windows, vehicle capacity and traffic.
- Loading: vehicles are loaded in reverse stop order to save time at each address.
- Customer notification: the shopper receives an estimated time window and tracking link.
- Delivery attempt: the driver hands over, leaves the parcel safely or redirects it.
- Proof of delivery: a scan, photo, signature or one-time code confirms the outcome.
Failed attempts return to the depot and become delivery exceptions, which trigger a second attempt, redirection to a pickup point or return to the sender. Each failed attempt adds cost without adding revenue, which is why carriers invest heavily in first-attempt success.
Why the last mile is so expensive
The last mile is expensive because it breaks economies of scale. Earlier legs move full trailers between a few hubs, while the last mile moves one or two parcels per stop to thousands of different addresses. Industry estimates often place it at roughly 40 to 50 percent or more of total shipping cost, although the share varies with density and service level.
| Driver | Why it raises cost | Typical lever |
|---|---|---|
| Stop density | Fewer stops per hour in sparse areas | Pickup points and lockers |
| Drop size | One parcel per stop spreads cost thinly | Order consolidation |
| Failed attempts | Repeat visits and returns to depot | Accurate time windows, safe places |
| Time windows | Narrow slots reduce route efficiency | Price premium for tight slots |
| Urban access | Parking, traffic and access restrictions | Cargo bikes, micro-hubs |
| Labor | Driver time is the largest cost item | Better routing and loading |
A central metric is cost per stop rather than cost per kilometer. Increasing the number of parcels per stop or the number of stops per route hour usually saves more than shortening distances.
Last-mile delivery models
Merchants and carriers combine several delivery models to balance speed, cost and customer convenience. The table compares the most common ones.
| Model | Typical speed | Cost profile | Best suited for |
|---|---|---|---|
| Standard carrier delivery | Next day to several days | Lowest per parcel | Most online orders |
| Same-day delivery | Within hours | High, needs local stock | Urgent or high-value orders |
| Parcel lockers | Similar to standard | Low, many parcels per stop | Urban and commuter customers |
| Pickup points | Similar to standard | Low, partner shops | Customers rarely home |
| Click and collect | Hours to days | Low for retailer with stores | Omnichannel retailers |
| Crowdsourced couriers | Often within hours | Variable, flexible capacity | Peaks and local deliveries |
Out-of-home options such as lockers and pickup points consolidate many deliveries into one stop and nearly eliminate failed attempts. Their limitation is convenience for bulky items and for customers without nearby locations.
Customer experience and performance metrics
The last mile shapes how customers judge the whole purchase. A late, damaged or misdelivered parcel often generates a support contact or a negative review aimed at the store, not at the carrier.
| Metric | What it measures | Why it matters |
|---|---|---|
| On-time delivery rate | Share delivered within the promise | Reliability of the delivery promise |
| First-attempt success rate | Share delivered on the first visit | Cost and customer effort |
| Cost per parcel | Total last-mile cost divided by parcels | Unit economics |
| Stops per hour | Route productivity | Labor efficiency |
| Claims rate | Lost, damaged or disputed parcels | Quality and fraud control |
Proactive notifications with narrow arrival estimates, an option to redirect parcels and clear shipment tracking reduce “where is my order” contacts, which are among the most common support requests in e-commerce.
Sustainability and common pitfalls
Last-mile delivery contributes to urban traffic, emissions and noise, and many cities restrict access for large diesel vehicles. Carriers respond with electric vans, cargo bikes and micro-hubs close to dense neighborhoods, and with consolidation through lockers.
- Promising speeds the network cannot deliver leads to missed promises and refunds.
- Poor address data, such as missing apartment numbers, causes failed attempts.
- Offering free fast delivery everywhere can erase margins on low-value orders.
- Split shipments multiply last-mile stops for a single order.
- Ignoring returns, since reverse logistics often uses the same last-mile network in the opposite direction.
Merchants rarely run the last mile themselves, but they control several inputs that strongly influence it. Choosing more than one carrier reduces dependence on a single network during peak seasons, and carrier selection rules can route bulky, remote or high-value parcels to the service best suited for them. Accurate parcel dimensions and weights prevent surcharges, and packaging that fits through a letterbox or into a small locker compartment avoids a failed attempt altogether.
The delivery promise shown at checkout should be derived from actual carrier performance data, not from nominal transit times. A slightly longer but reliable promise usually produces fewer complaints than a fast promise that is missed regularly.
The short version
Last-mile delivery is the trip a parcel makes from the local depot to the customer. Earlier, the parcel travels in a big truck with thousands of others, which is efficient. At the end, a driver has to stop at each house separately, find parking and sometimes come back because nobody was home.
That final, personal step is the slowest and most costly part of getting an online order to someone, and it is also the part customers remember.
Where it makes a difference
An online pet supply store ships about 3,000 orders per day, mostly heavy bags of food. Customer reviews show frequent complaints about missed deliveries, and the carrier reports that roughly one in ten parcels needs a second attempt in apartment districts.
The store adds parcel lockers and pickup points as checkout options, collects apartment numbers through a required address field, and sends evening notifications with a two-hour arrival window. Within three months, failed attempts fall substantially, support contacts about delivery decline, and the carrier offers a lower rate for locker deliveries because each stop now carries many parcels.