Guide · Amazon Seller Fulfilled Prime
Seller Fulfilled Prime (SFP) puts the Prime badge on products you ship from your own warehouse or 3PL. Amazon reopened it with a much stricter rulebook than the one most articles still describe: weekly evaluation, delivery-speed targets measured on what shoppers see before they buy, weekend operations, and three metrics that end your enrollment when they slip. This page lists the 2026 requirements as Amazon enforces them, what each one means for a warehouse, and how to run SFP without living in the performance dashboard.
What SFP is
Seller Fulfilled Prime lets a Professional seller with a US ship-from address show the Prime badge on offers it fulfills itself. Amazon closed new enrollment for several years, reopened it in late 2023 with tighter rules, and has kept tightening: performance is now judged weekly, and the delivery-speed requirement is measured on the promise shoppers see on the page, not only on what you ship. Most of the SFP content online predates those changes.
The trade is simple. You keep inventory control, avoid FBA fees, and can fulfill Amazon, Walmart, and your own store from the same shelf. In exchange you run a warehouse to Amazon's standard: fast cutoffs, weekend shifts, nationwide one-to-two-day promises, and metrics that remove the badge automatically when they slip. The SFP and managed shipping services article covers the shipping-template side; this page is the rulebook.
Three stages
| Stage | What Amazon requires | Notes |
|---|---|---|
| Prequalification | Professional account, US default ship-from address, 100+ seller-fulfilled packages in the last 90 days, cancellation under 2.5%, valid tracking above 95%, late shipment under 4% | These are the loose gates; the trial is where the real thresholds apply |
| Trial | Ship at least 100 Prime trial packages inside the trial window while meeting the ongoing metrics below every week | Weekend fulfillment is enforced from day one of the trial |
| Ongoing | Weekly evaluation against on-time delivery, valid tracking, cancellation rate, and delivery-speed targets | Sustained misses remove the badge; re-enrollment means a new trial |
The three metrics
| Metric | Threshold | How it is measured | What usually breaks it |
|---|---|---|---|
| On-Time Delivery Rate | 93.5% or higher | Packages delivered by the promised date, evaluated weekly | Carrier misses on long zones, handling time set above zero, cutoffs too early |
| Valid Tracking Rate | 99% or higher | Orders with a valid tracking number from an Amazon-integrated carrier, with scans | Regional carriers Amazon does not integrate, scans that post late, tracking uploaded after the fact |
| Pre-fulfillment Cancellation Rate | 0.5% or lower | Seller-initiated cancellations before shipment | Overselling across channels, stock in the wrong warehouse |
The margin is thinner than the numbers suggest. Sellers near 93.5% on-time delivery are exposed to any carrier disruption; sellers who win the Buy Box run closer to 97%. Amazon's Shipping Settings Automation and Buy Shipping labels carry on-time delivery protection for minor lateness on standard and premium shipping, which is why nearly every SFP operation buys labels through Amazon rather than its own carrier accounts. Cancellations are the metric an OMS controls outright: with one inventory pool across channels and allocation at order time, seller-initiated cancellations are an anomaly rather than a rate.
Delivery speed
The speed requirement is the one most sellers misunderstand. Amazon does not only ask whether you delivered fast; it measures what percentage of Prime customer page views for your offers showed a fast delivery date before the customer ordered. Your shipping templates, cutoffs, inventory location, and carrier coverage determine that promise, so a seller can ship every accepted order on time and still fail on speed because too many shoppers saw a slow date.
| Size tier | One-day | Two-day | Five-day |
|---|---|---|---|
| Standard size | 40% of Prime page views | 75% | 90% |
| Oversize | 15% | 45% | 80% |
| Extra large | No one-day threshold | 25% | 60% |
Those thresholds took effect July 6, 2026. Amazon has also said it is excluding weekend page views from the speed evaluation between May 31 and October 17, 2026; that does not suspend the weekend shipping obligation, only the way weekend views count toward speed. Practically, the speed targets are a geography problem: a single warehouse on one coast cannot show one-day promises to the other coast, which is why multi-warehouse routing or a 3PL network is part of most SFP operations.
Operational rules
| Rule | Requirement | Warehouse impact |
|---|---|---|
| Handling time | Zero-day handling for same-day, one-day, and two-day offers | Orders placed before cutoff ship the same day |
| Order cutoffs | No earlier than 2:00 pm weekdays and 10:30 am weekends | Afternoon pick waves, not morning-only |
| Weekend operations | Ship on at least one weekend day; deliver six days a week | Saturday or Sunday shift, carrier pickup arranged |
| Coverage | Free standard shipping to the contiguous US for Prime customers | Nationwide templates; long zones covered by service upgrades or a second origin |
| Returns | Free returns on Prime items under 50 lb; refunds inside Amazon’s window | Returns workflow that refunds within two days of receipt |
| Labels | Amazon-integrated carriers; Buy Shipping for on-time protection | Label purchase through Amazon rather than direct carrier accounts |
Running it
SFP is a multi-warehouse, multi-channel problem, which is what an order management system is for. InfiPlex allocates each Prime order to the warehouse or 3PL that can meet the promised date, sorts the pick queue by ship-by time so cutoff orders leave the same day, buys labels through Amazon Buy Shipping so tracking is valid and on-time protection applies, posts tracking from the ship scan, and keeps Amazon's available quantity in step with every other channel so pre-fulfillment cancellations stay near zero. Multi-location inventory setup is covered in the multi-location inventory article, routing rules in multi-warehouse order routing. If a 3PL runs the weekend shift, the 3PL Connector carries the order out and the tracking back inside the window.
Frequently asked
The questions sellers ask before applying and during the first weeks of the trial.
On-time delivery of 93.5% or higher, valid tracking of 99% or higher, and a pre-fulfillment cancellation rate of 0.5% or lower, evaluated weekly, plus delivery-speed targets measured on Prime page views: 40% one-day, 75% two-day, and 90% five-day for standard-size items.
Amazon measures the percentage of Prime customer page views for your offers that showed a one-day, two-day, or five-day delivery date. It is about the promise displayed, not only the shipment, so shipping templates, cutoffs, and warehouse locations decide it. Thresholds differ by size tier.
Yes. Amazon requires shipping on at least one weekend day and delivery six days a week, with weekend cutoffs no earlier than 10:30 am. The temporary exclusion of weekend page views from speed evaluation in 2026 does not remove the weekend shipping obligation.
A Professional account, a US default ship-from address, at least 100 seller-fulfilled packages in the last 90 days, a cancellation rate under 2.5%, valid tracking above 95%, and a late shipment rate under 4%. The trial then applies the tighter ongoing thresholds.
Amazon gives a trial window in which you must ship at least 100 Prime trial packages while meeting the ongoing metrics every week. The window varies with your volume; most sellers plan for about a month of stable operations.
Because it guarantees valid tracking from an Amazon-integrated carrier and, with Shipping Settings Automation, carries on-time delivery protection for minor lateness on standard and premium shipping. Own-account labels put both the tracking and the on-time metrics at risk.
Rarely for standard-size items, because one-day promises cannot be shown to the far coast from a single origin. Most SFP operations use two or more warehouses or a 3PL network with routing rules that pick the location closest to the customer.
By keeping one inventory pool across Amazon and every other channel and allocating stock at order time, so a unit sold on Walmart or your store cannot also be promised on Amazon. Pre-fulfillment cancellations become an exception rather than a rate.
Amazon evaluates weekly. Sustained misses on on-time delivery, valid tracking, or cancellation rate remove the Prime badge from your offers, and re-enrollment requires passing the trial again.
Resources
Multi-warehouse allocation, same-day pick queues, Buy Shipping labels, tracking from the scan, one inventory pool. Live in 1–3 business days.
We set up multi-warehouse Amazon operations every week. Bring your order volume, warehouse locations, and current metrics and we will map what it takes to stay above the thresholds. Contact us, email info@infiplex.com, or call 888‑770‑0857.
InfiPlex™ is a trademark of InfiPlex. Amazon, Seller Central, Seller Fulfilled Prime, Amazon Business, Amazon Warehousing and Distribution, Selling Partner API, FBA, and Prime are trademarks of Amazon.com, Inc. or its affiliates. InfiPlex is an independent integration provider and is not endorsed by or affiliated with Amazon. Program rules, thresholds, and fees are set by Amazon and change; verify current terms in Seller Central before relying on them. ©2026 InfiPlex. All rights reserved.
InfiPlex provides eCommerce companies, warehouses, and 3PLs with a robust platform to manage their sales channels.
©2026. All Rights Reserved. Privacy Policy | Terms & License