USPS Letter Carriers Enter Mediation as Contract Negotiations Stall

S. Postal Service and the National Association of Letter Carriers have entered a mandatory 60-day mediation period after failing to reach agreement on a new collective bargaining contract. The existing agreement expired on Friday, with NALC representing 295,000 delivery workers currently engaged in contentious negotiations over compensation and working conditions.

The stalemate occurs against a backdrop of severe financial pressure at USPS, which reported a $2 billion loss in Q2 and a $9 billion loss in fiscal year 2025. This labor dispute carries significant implications for supply chain professionals and logistics operators nationwide. While postal workers are legally prohibited from striking, the article warns that a frustrated workforce could result in service deterioration—a critical risk for retailers, ecommerce companies, and businesses relying on USPS for last-mile delivery.

If mediation fails, the parties will resort to binding arbitration, extending uncertainty through at least the 60-day window and potentially beyond. For supply chain teams, this development signals the need to stress-test contingency plans for mail and parcel delivery disruptions, diversify carrier relationships, and monitor negotiation progress closely. The intersection of labor cost pressures and USPS's mounting financial losses creates a structural challenge that may reshape pricing models and service reliability expectations in the last-mile market.