Amazon’s quiet but massive plan to roll out more than a thousand same‑day fulfillment centers by 2031 represents a strategic countermove against Walmart’s long‑standing geographic advantage.
Rather than merely expanding its product catalog, the initiative—dubbed Project Mercury—seeks to shrink the distance between high‑velocity everyday goods and the majority of Prime members.
By positioning inventory within a ten‑mile radius of roughly 80% of U.S. Prime subscribers, Amazon hopes to turn speed into a habitual shopping trigger, encouraging more frequent, smaller basket purchases that historically have been Walmart’s stronghold.
Project Mercury’s blueprint calls for scaling Amazon’s existing same‑day network from about 85 facilities today to over 1,000 hyper‑local hubs within the next seven years.
Unlike traditional fulfillment centers that stock millions of SKUs, these new sites will concentrate on a curated assortment of approximately 90,000 fast‑moving items—think paper towels, over‑the‑counter medicines, fresh produce, and snack foods.
The focus is on turning these hubs into rapid‑replenishment nodes that can restock themselves multiple times a day, thereby enabling true same‑day delivery without the need to duplicate Amazon’s entire catalog in every neighborhood.
Walmart’s current edge stems from its physical footprint: roughly 5,000 stores that already place a store within ten miles of about 90% of the U.S. population.
The retailer has been converting these locations into micro‑fulfillment centers, leveraging existing aisles, back‑rooms, and curb‑side pickup lanes to push more than 70% of its online orders out the same day.
This store‑based network gives Walmart a built‑in advantage in last‑mile density that pure‑play e‑commerce players have struggled to match.
Amazon’s Mercury project is essentially an attempt to recreate that store‑like proximity through purpose‑built, smaller‑scale fulfillment points rather than repurposing large retail spaces.
From a financial standpoint, Bank of America characterizes the estimated $6.8 billion capital outlay for Project Mercury as “manageable” given Amazon’s cash‑generating core businesses.
Internal models reviewed by Business Insider anticipate the network turning cash‑flow positive by 2030 and delivering roughly $7.1 billion in cumulative economic value over a ten‑year horizon.