Amazon Seller Fulfilled Prime (MFN Prime): Requirements, costs, and how it works
MFN stands for Merchant Fulfilled Network. It is Amazon’s term for orders that the seller fulfills instead of Amazon, which many sellers also call FBM (Fulfillment by Merchant). Seller Fulfilled Prime (SFP), sometimes called MFN Prime, is a program within that model. It lets qualified sellers show the Prime badge while shipping from their own warehouse, without sending inventory to Fulfillment by Amazon (FBA).
Prime shoppers are some of Amazon’s most active customers, so the badge can make a real difference to visibility and sales. It also moves Amazon’s Prime delivery promise onto your own operation, and the standards are strict.
This guide covers what MFN means, how SFP works, the current requirements and trial rules, what it costs, and how it compares with FBA. For background on FBA, see our Amazon FBA guide and our comparison of Amazon FBA vs FBM.
What does MFN mean on Amazon?
MFN is Amazon’s label for merchant-fulfilled orders. There are three ways to fulfill an Amazon order, and they differ in who ships it and whether it can carry the Prime badge:
| Option | Who fulfills the order | Prime badge |
|---|---|---|
| FBA | Amazon stores, packs, and ships | Yes, for eligible products |
| MFN (FBM) | You, or a 3PL you hire | No, unless you qualify for Seller Fulfilled Prime |
| Seller Fulfilled Prime | You, or a 3PL you hire, to Prime standards | Yes, after you pass the trial |
What is Seller Fulfilled Prime?
Seller Fulfilled Prime lets MFN sellers list products as Prime eligible while keeping control of their own fulfillment. You store the inventory, pick and pack the orders, and ship them to Prime customers on Amazon’s terms: free one-day and two-day delivery, with tracking and performance that match FBA.
Amazon launched the program in 2015, paused new enrollment in 2019 after inconsistent delivery experiences, and reopened it in October 2023 with stricter standards.
Because the standards are demanding, SFP suits sellers who already have strong fulfillment operations and want Prime visibility without using FBA.
Seller Fulfilled Prime requirements
The requirements below apply to the US marketplace and reflect Amazon’s published rules and industry reporting as of October 2026. Amazon updates them, so confirm the current numbers in Seller Central before you apply.
| Stage | What Amazon requires |
|---|---|
| Pre-qualification (past 90 days) | A Professional selling account with a US address. At least 100 seller-fulfilled packages. A late shipment rate under 4%, a cancellation rate under 2.5%, and a valid tracking rate above 95%. |
| 30-day trial | Ship at least 100 Prime trial orders. On-time delivery rate of at least 93.5%, valid tracking rate of at least 99%, and a seller-initiated cancellation rate under 0.5%. The Prime badge does not show during the trial. |
| Ongoing | The same on-time delivery, tracking, and cancellation metrics, checked every week, plus delivery-speed requirements. |
Delivery speed
Amazon measures how many Prime customer page views show a qualifying one-day or two-day delivery date, not only whether orders arrived on time. On July 6, 2026, Amazon raised the delivery-speed thresholds for every size tier. A grace period, during which weekend orders were excluded from the speed calculations, ran through October 17, 2026. Amazon is also rolling out a ZIP-code delivery promise tool in Seller Central.
These speed requirements push many sellers toward more than one warehouse, or toward a 3PL with a national network.
Shipping labels, carriers, and returns
- Buy shipping labels through Amazon Buy Shipping, and use Amazon-integrated carriers so your tracking counts as valid.
- Turn on Shipping Settings Automation and buy OTDR Protected labels, which protect your on-time delivery rate from carrier and weather delays.
- Ship Prime orders the same day, including on weekends, and offer free one-day and two-day delivery to Prime customers.
- Amazon now requires prepaid return labels for seller-fulfilled orders, including SFP. Confirm the details in Seller Central.
Sellers who fall below the requirements can lose the Prime badge because Amazon reviews performance every week. Other marketplaces, including the UK, have their own rules and warehouse requirements.
How does Seller Fulfilled Prime work?
- Check if you pre-qualify. Review your 90-day metrics in Seller Central.
- Register for the trial. Choose the products you want to offer with Prime.
- Complete the 30-day trial. Ship at least 100 Prime orders while meeting every metric. The badge stays hidden.
- Enroll automatically. After you pass, your registered products display the Prime badge.
- Ship Prime orders on Amazon’s terms. Buy labels through Amazon Buy Shipping, ship the same day, and keep tracking valid.
Plan your trial start carefully. Amazon has typically limited new trial graduations over the holiday period, so starting earlier in the year gives you more room. Stock-outs during the trial hurt twice: cancelling orders damages your cancellation rate, and delaying them damages your on-time rate.
Seller Fulfilled Prime costs and fees
Amazon doesn’t charge any additional fee to use Seller Fulfilled Prime. You pay the shipping cost of the carrier you use, and your selling plan and referral fees stay the same. Because you must offer free one-day and two-day delivery to Prime customers, build shipping costs into your pricing.
Advantages of Seller Fulfilled Prime
Prime visibility without FBA
Prime-eligible offers are more visible to Prime shoppers and can improve your chances of winning the Buy Box. See our guide to winning the Amazon Buy Box.
No FBA fulfillment or storage fees
You avoid FBA fulfillment, storage, and inbound fees, along with the storage limits tied to your IPI score. See Amazon FBA fees explained for what you would otherwise pay.
Control of inventory and packaging
You keep your stock in your own warehouse and ship in your own packaging, which helps you build a brand that isn’t tied to Amazon.
Disadvantages of Seller Fulfilled Prime
- Strict, weekly standards. You must keep your on-time delivery, tracking, and cancellation metrics up, week after week.
- Rising speed requirements. The July 2026 changes raised the bar, and meeting them can mean extra warehouses or a 3PL.
- Operational demands. Same-day shipping, weekend operations, and Amazon Buy Shipping labels are required.
- A high-stakes trial. You need volume, stock, and processes in place before you start.
- Free shipping costs. One-day and two-day delivery has to be built into your margins.
Seller Fulfilled Prime vs FBA
| Seller Fulfilled Prime | FBA | |
|---|---|---|
| Who ships | You or your 3PL | Amazon |
| Amazon fees | Selling plan and referral fees only | Selling plan, referral, fulfillment, storage, and inbound fees |
| Control | Full control of stock and packaging | Limited, and storage limits apply |
| Effort and risk | High: you carry the Prime delivery promise | Lower: Amazon carries it |
| Customer service and returns | You handle them, within Amazon’s rules | Amazon handles them |
If you aren’t sure which fits, read our comparison of FBA vs FBM and our guide to Amazon FBA vs 3PL.
Is Seller Fulfilled Prime right for you?
- You already ship at least 100 orders in a typical 90-day period, and your metrics are strong.
- You can ship the same day, including weekends, and reach most of the US in one or two days.
- You have stock levels that won’t run out during the trial.
- You want Prime visibility but need to control inventory, packaging, or costs that FBA doesn’t allow.
Some 3PLs run fulfillment to SFP standards. If you use one, ask them to show that they can meet the metrics before you apply.
Managing Seller Fulfilled Prime with Linnworks
Meeting SFP standards depends on getting orders out fast and tracking them correctly. Linnworks shipping management handles carriers, labels, and tracking, and order management rules can send Prime orders to a priority queue before your team sees them. Linnworks also keeps stock synced across 100+ native channel integrations in under 10 minutes, so you don’t oversell during the trial.
Get a Linnworks demo: ship Prime orders faster and keep stock accurate
See how Linnworks routes, labels, and tracks orders so your team can meet Amazon’s delivery standards.
Frequently asked questions
MFN stands for Merchant Fulfilled Network. It is Amazon’s term for orders that the seller stores, packs, and ships, instead of using Fulfillment by Amazon. Many sellers call it FBM (Fulfillment by Merchant).
Seller Fulfilled Prime (SFP) is an Amazon program that lets qualified merchant-fulfilled sellers display the Prime badge while shipping from their own warehouse, without using FBA.
To trial and stay enrolled, sellers need an on-time delivery rate of at least 93.5%, a valid tracking rate of at least 99%, and a seller-initiated cancellation rate under 0.5%, plus Amazon’s delivery-speed requirements. Amazon updates the rules, so check Seller Central for the current numbers.
Amazon doesn’t charge any additional fee for Seller Fulfilled Prime. You pay the shipping cost of your carrier, and your normal selling plan and referral fees still apply.
The trial lasts 30 days. Sellers must ship at least 100 Prime trial orders while meeting all the performance metrics, and the Prime badge does not show during the trial.
Yes. Many sellers use FBA for some products and merchant fulfillment, with or without Seller Fulfilled Prime, for others, such as bulky or slow-moving items.
It can be, if you already run a strong fulfillment operation and want Prime visibility without FBA fees. The standards are strict and reviewed weekly, so it is not a good fit for sellers who can’t ship the same day or meet the delivery-speed requirements.