If you sell on Amazon, you have probably seen the terms “1P” and “3P” thrown around and wondered which one actually applies to you — and, more importantly, how prep works differently under each model. The distinction matters more than most sellers realize, because it changes who owns the inventory, who sets the price, and exactly how your products need to be prepped and labeled before they reach an Amazon fulfillment center.
This guide breaks down what Amazon 1P and 3P really mean, how prep requirements differ between them, and how to think about the move from one model to the other without creating compliance headaches.
What is Amazon 1P?
Amazon 1P (“first party”) means you sell to Amazon. You are a supplier, or vendor, and Amazon buys your inventory wholesale through Vendor Central. Amazon then owns that inventory, sets the retail price, and sells it to customers under the “Ships from and sold by Amazon” banner.
In the 1P model you receive purchase orders (POs) from Amazon, fulfill those POs to Amazon’s specifications, and get paid as a wholesale supplier. You do not control the listing price, and you have far less say over the customer-facing content than a brand owner in the 3P world does. Access to Vendor Central is invitation-only — you cannot simply sign up.
What is Amazon 3P?
Amazon 3P (“third party”) means you sell on Amazon through Seller Central. You own the inventory the entire time, you set your own prices, and you list directly to customers in the marketplace. The vast majority of the Amazon catalog is now 3P.
Most 3P sellers use Fulfillment by Amazon (FBA), where you ship inventory into Amazon’s fulfillment network and Amazon handles storage, picking, packing, and shipping. You retain control of pricing, branding, and catalog content — but you also carry the responsibility of getting every unit prepped to FBA standards before it arrives.
1P vs 3P: the core differences
Who owns the inventory: In 1P, Amazon buys and owns it. In 3P, you own it until it sells.
Who sets the price: Amazon controls retail price in 1P. You control it in 3P.
How you get paid: 1P pays you wholesale via POs on Amazon’s payment terms. 3P pays you the retail proceeds minus Amazon’s fees.
Barrier to entry: 1P (Vendor Central) is invitation-only. 3P (Seller Central) is open to anyone.
Content control: 3P brand owners have more direct control over listings; 1P vendors work within Amazon’s retail systems.
There is no universally “better” model. Many established brands run a hybrid — some ASINs through 1P, others through 3P — and the right mix depends on margin, volume, and how much control you want over pricing and content.
How prep differs between 1P and 3P
This is where a lot of sellers get tripped up. Prep is required under both models, but the standards, routing, and consequences differ.
3P (FBA) prep. Every unit must meet Amazon’s FBA prep and packaging requirements before it enters a fulfillment center: correct FNSKU labeling, poly-bagging with suffocation warnings where required, bubble wrap for fragile items, bundling and set labeling, expiration-date formatting for consumables, and more. Miss a requirement and you face unplanned-prep fees, relabeling charges, or a rejected shipment. This is the prep most sellers are familiar with, and it is where a dedicated Amazon prep center earns its keep.
1P (Vendor Central) prep. Vendors must fulfill Amazon POs to strict vendor routing, labeling, and packaging guidelines. Chargebacks are the enforcement mechanism here — non-compliant cartons, wrong labels, bad ASN data, or missed routing windows all trigger deductions against your invoices. The prep discipline is arguably tighter than 3P because the penalties are automatic and land straight on your payments.
The common thread: whether you are shipping POs to Amazon as a vendor or sending FBA shipments as a seller, the prep has to be right the first time. The failure modes are just labeled differently — “unplanned prep fees” in 3P, “chargebacks” in 1P.
Thinking about the 1P to 3P transition
A growing number of brands are moving from 1P to 3P (and Amazon itself has pushed some vendors in that direction). The appeal of 3P is control: you set pricing, you own the customer content, and you keep the full retail margin instead of a wholesale cut.
The catch is that the transition puts the entire prep and fulfillment burden on you. Under 1P, you shipped bulk POs to Amazon and Amazon took it from there. Under 3P FBA, every unit needs FNSKU labeling and FBA-compliant prep before it ships, and you own the ongoing operation. Brands that underestimate this find themselves buried in prep work, unplanned-prep fees, and stranded inventory right when they are trying to grow.
This is exactly where partnering with a prep center makes the transition smooth: you get FBA-compliant prep at scale without building the operation in-house.
Get your prep right, whichever model you run
Whether you are a 1P vendor managing Amazon POs, a 3P seller scaling FBA, or a brand navigating the move from one to the other, the prep standard is unforgiving and the fees for getting it wrong add up fast.
ZonPrep handles FBA-compliant prep — FNSKU labeling, poly-bagging, bundling, inspection, and shipment routing — so your inventory arrives right the first time, every time. Get in touch to talk through your prep needs.