Amazon is changing how it decides who keeps the Prime badge on seller-fulfilled orders in the UK store. From 30 October 2026, Seller Fulfilled Prime (SFP) eligibility will be judged per product tier instead of across your whole account. Any UK seller running SFP, especially on large or bulky items, needs to look at this before the end of the month.
According to the official Seller Central announcement, Amazon is introducing three product tiers: standard-size, oversize and extra-large. Existing SFP metrics will be measured at tier level from 30 October, and two new tier-specific requirements follow, with a grace period that runs until 6 January 2027.
What exactly is changing?
Three product tiers: SFP products in the UK store are split into standard-size, oversize and extra-large. The dimensions for each tier sit on the Eligible product selection for Seller Fulfilled Prime help page.
Tier-level assessment: Amazon will check weekend-capable shipping methods, on-time shipment rate, Buy Shipping or Easy Ship usage and cancellation rate per tier, not per account.
Standard-size speed rule: At least 25% of customer page views must show a delivery date within one day.
Extra-large carrier freedom: You can ship extra-large Prime orders with any logistics provider outside Buy Shipping or Easy Ship, as long as Amazon receives a valid tracking number and your on-time delivery rate on those orders stays at 97% or higher.
Grace period: The one-day speed rule and the 97% on-time rule are not used to assess eligibility until 6 January 2027. Until then, Amazon may email you when you fall below the bar.
New dashboard metric: Your SFP dashboard now shows the share of standard-size page views with a one-day delivery date.
Why does this matter for sellers?
Account-level scoring let strong performance on small parcels cover weaker results on bulky goods. That cushion is gone. If your extra-large orders keep missing on-time shipment, you could lose Prime on that tier while your standard-size catalogue stays fine, or the other way round. Losing the badge on a tier can hurt visibility and conversion on those ASINs, right in the middle of Q4.
The one-day rule is the bigger shift for standard-size items. Some sellers in the announcement thread report zero one-day page views, and an Amazon moderator replied that the figure comes from shipping template settings. If your template, handling time or cut-off times do not support next-day delivery, this metric will stay low no matter how fast you pack. On the plus side, extra-large sellers get more freedom to pick a specialist freight carrier, as long as the tracking data flows back to Amazon.
What should sellers do now?
Map your catalogue to tiers: Check the tier dimensions and work out which SFP ASINs fall into standard-size, oversize and extra-large.
Check the new dashboard metric: Open your SFP dashboard and note your current one-day page view share for standard-size products against the 25% bar.
Fix your shipping templates: Review handling time, order cut-off times and weekend shipping settings so eligible postcodes can show a next-day date.
Audit extra-large carriers: If you ship bulky items outside Buy Shipping or Easy Ship, confirm every order uploads a valid tracking number and track on-time delivery against 97%.
Use the grace period: Treat any warning emails before 6 January 2027 as a to-do list, not noise.
Have a fallback ready: For ASINs where a tier looks at risk, consider moving peak stock into FBA so the Prime badge stays live over the holidays.
eStore Factory Tip: Pull your SFP dashboard numbers by tier this week and compare them before and after 30 October. If one tier is dragging, fix the template or carrier for that tier only instead of reworking the whole account. Our Amazon account management team can review your SFP setup and shipping templates before the new rules start counting.
