Amazon's contingency plan if it lost USPS: build out delivery to 39,400 ZIP codes by 2029

The planning document calls the problem the "structural fragility of external carrier dependency" ^[12]. If an outside carrier abruptly changes its volume or contract terms, areas with no Amazon alternative face immediate service problems and "no mitigation lever available," according to the document ^[12]. Business Insider reported that this weakness was still there after Amazon and USPS signed their April deal ^[12][2].

Amazon's own footprint would grow from 23,700 ZIP codes to about 39,400, so roughly 15,700 would be added ^[16][3][1]. New stations account for about 3,300 of them and Hub Delivery for about 4,500 ^[13][14], some 7,800 together ^[2]. The remaining 7,900 or so, about half the expansion, falls to the third piece ^[3]. Amazon would cut the number of packages a ZIP code must generate each day before Amazon delivers there itself from 50 to, eventually, none ^[15]. Existing stations could then add nearby low-volume ZIP codes without new buildings ^[15].

The trade-off is route density against redundancy. Amazon would run its own routes in ZIP codes that were too small for them under its old rules ^[15]. Those thin areas matter because USPS has historically given Amazon reach in rural and remote places where its own network is thinner, and Amazon has been the Postal Service's largest customer ^[9]. The document rated Hub Delivery, aimed mainly at rural areas, as the most attractive option on cost and customer experience wherever a dedicated station was not economical ^[14].

An Amazon spokesperson treated the document as one draft among many. "We're always forecasting across our operations, and we routinely produce and revise many versions of planning documents," the spokesperson said. "That said, no one should be surprised that Amazon works to build redundancy into its logistics network to ensure continuity of service for customers." ^[7] A skeptic would take the first sentence at face value and read the 2029 target as a forecast. That discount is fair for the date. It is weaker for the direction, because the April contract has already moved. A floor 19% below the old one ^[11] puts the previous minimum near 1.57 billion packages, so the guaranteed volume fell by about 300 million ^[4][5]. The report does not say which side pushed for the lower floor or how long the contract runs.

The leverage builds slowly. The stations open between 2027 and 2029 ^[13]. Business Insider's reading, that the approach protects Amazon if partners change plans and strengthens its hand in future negotiations ^[5], therefore applies a piece at a time, and the April contract was signed before any of it existed ^[2]. In December, Amazon said USPS had walked away from talks at "the eleventh hour," creating "significant uncertainty" ^[10]. If the plan holds, a future breakdown of that kind would hit a company with its own route into about 95% of US ZIP codes ^[3].