Amazon Logistics: Why the AMZN–USPS Deal Keeps Amazon in Control of Last-Mile Costs

Opening hook: Amazon reportedly holds on to roughly 80% of USPS volume, keeping control of roughly 1 billion parcels

Reports say Amazon will keep roughly 80% of its existing deliveries with the U.S. Postal Service — roughly 1 billion packages per year — under a tentative agreement after a tense contract standoff. The deal, if finalized, would avoid an earlier reported plan by Amazon to cut USPS volume by about two‑thirds, and it would materially change the economics of last‑mile delivery for 2026 and beyond.

What happened: the deal, the numbers, and the immediate facts

Reports say Amazon and the U.S. Postal Service reached a tentative deal that would keep about 80% of current Amazon parcel volume with USPS, rather than the roughly two‑thirds reduction Amazon had reportedly considered. That equates to roughly 1 billion packages annually staying on postal routes. If those numbers hold, that leaves roughly 20%, or about 200 million packages, that Amazon could potentially shift away from USPS — though whether Amazon can or will do so depends on future operational decisions and the final contract terms.

The volume Amazon generates is meaningful to USPS finances. Amazon contributes about $6 billion in annual revenue to the Postal Service, roughly 7.5% of an $80 billion operating budget, while USPS reported net losses in recent years (about $9.5 billion in fiscal 2024 and roughly $9.0 billion in fiscal 2025). A 20% reduction in Amazon volume would imply about $1.2 billion less revenue for USPS if the math is linear, a nontrivial hit to a loss‑making agency.

Why it matters: margins, leverage, and rural delivery economics

This deal matters because Amazon gets what it sought most, control and optionality. By keeping roughly 80% of volume with USPS, Amazon avoids the operational disruption and incremental cost of moving roughly 1 billion parcels, preserving short‑term unit economics that support margins at the retail and Prime level.

At the same time Amazon secures leverage. Retaining about 80% now would give the company flexibility to shift more volume later, potentially moving over 200 million packages to its own network or other partners if unit costs fall or service needs change. Historically Amazon has invested in delivery infrastructure since the mid‑2010s to reduce reliance on third parties, an evolution that has both raised fixed costs and increased negotiating power.

For USPS, the deal is relief and a warning. Keeping the bulk of Amazon parcels stabilizes near‑term revenue, but the USPS remains vulnerable. The agency posted large net losses in recent years (about $9.5 billion in fiscal 2024 and roughly $9.0 billion in fiscal 2025), and a potential run‑rate decline of $1.2 billion from Amazon over time would deepen budgetary stress and increase the urgency of operational reforms or legislative relief.

The bull case: Amazon preserves margins and optionality

Bullish investors will like three clear facts: Amazon retains roughly 1 billion annual USPS parcels, it preserves cost predictability for peak seasons, and it keeps the option to migrate ~200 million parcels into its own network. Those ~200 million packages represent direct margin upside if Amazon can deliver them cheaper than USPS, or strategic leverage to win better pricing on future USPS contracts.

Operationally, fewer surprises in shipping volumes support free cash flow predictability. Amazon's logistics investments—delivery stations, contracted carriers, and the Delivery Service Partner program—become more valuable when used selectively, not as an all‑in replacement. For AMZN shareholders this reduces a tail‑risk scenario where last‑mile chaos erodes Prime economics and adjoins higher shipping expense.

The bear case: USPS fragility and political risk remain

Bears will point to the fragile state of USPS finances and the blunt negotiating power Amazon holds. The Postal Service reported substantial net losses in recent years (about $9.5 billion in fiscal 2024 and roughly $9.0 billion in fiscal 2025), and a gradual 20% decline in Amazon‑related volume equals roughly $1.2 billion of revenue at risk. That could force deeper cuts to rural services, raise prices for other customers, or push USPS to seek emergency funding from Congress, introducing political risk into parcel flows.

There is also execution risk for Amazon. Moving the ~200+ million parcels it may choose to migrate requires capacity, driver availability, and tighter operational control, and those investments are capital‑intensive. If Amazon underestimates the cost of replacing USPS deliveries, the margin benefits could prove smaller than expected.

What this means for investors: trade ideas, metrics to watch, and timeframes

Actionable takeaway: treat the reported deal as a net positive for AMZN but a structural challenge for the Postal Service and an ongoing watch item for UPS and FDX. The immediate winners are Amazon (AMZN) and the smooth functioning of e‑commerce margins; the near‑term losers are USPS if volume erosion resumes, and legacy carriers if Amazon expands its own footprint.

Watch these specific metrics over the next two quarters: monitor Amazon's shipping expense per unit and guidance at the next earnings call, track declared parcel volume moved to Amazon Logistics (any move above ~200 million packages would be material), and watch UPS (UPS) and FedEx (FDX) for changes in pricing power or route density that could follow Amazon's continued reshaping of last‑mile flows.

Trade ideas: consider owning AMZN on dips to the extent the market prices in execution risk from any future parcel migration. For income or defensive exposure, watch UPS and FDX for short‑term volatility and possible buying opportunities if guidance weakens; avoid leveraged bets on USPS stability because legislative outcomes remain binary.

Quick checklist for investors

• AMZN: buy/accumulate on dips, monitor shipping cost per unit and Prime margin impact.
• UPS/FDX: watch next‑quarter guidance, volume and yield changes; expect volatility linked to Amazon’s routing.
• USPS: not investable directly, but policy risk could create knock‑on effects—watch Congressional hearings and any emergency funding requests.

Investor takeaway: Reports suggest the deal lowers immediate execution risk for AMZN and secures roughly 1 billion parcel deliveries, while leaving Amazon with the potential optionality to move ~200M packages later. Position accordingly, and track shipping‑cost metrics closely.