Quick Summary
- •May 25, 2026: Amazon announces tighter Seller Fulfilled Prime delivery speed thresholds
- •July 6, 2026: new national one-day and two-day coverage targets take effect
- •Grace period of roughly four weeks on the speed metric calculation eases the transition
- •New per-ZIP delivery promise tool replaces the default ship-from-ZIP promise
- •Single-warehouse SFP sellers and oversized categories are most exposed to Prime badge suppression
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Verified Sources
- ppc.land: Amazon tightens Seller Fulfilled Prime speed rules starting July 6 (May 26, 2026)
- Amazon Seller Forums: SFP program update announcement
- AMZ Advisers: Seller Fulfilled Prime program requirements baseline (Apr 28, 2026)
- EcommerceBytes: Amazon Changes How It Computes Customer Service Metric (May 14, 2026)
- Federal Register: Domestic Competitive Products Pricing and Mailing Standards Changes (May 15, 2026)
All information verified from official Amazon sources and trusted industry analysts as of publication date.
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