Under 1P you sell your units to Amazon at a wholesale cost price and Amazon becomes the seller of record. Under 3P you stay the seller, Amazon takes a referral fee and a fulfillment fee, and you keep the retail price. The difference is not a preference about control; it is a different per-unit contribution and a very different cash cycle, and both can be calculated before you decide.
This article runs the arithmetic on one product both ways, then shows where the cash difference matters more than the margin difference.
The one-line difference
1P means Amazon Retail issues a purchase order, you ship into their network, they own the inventory and they set the retail price. Your customer is Amazon. You invoice, and you get paid on terms.
3P means you list the product yourself in Seller Central, you own the inventory until a shopper buys it, and you set the retail price. Your customer is the shopper. Amazon deducts its fees and disburses what is left on a schedule.
Everything else — advertising access, content control, chargebacks, returns treatment — follows from who owns the unit at the moment of sale.
What a 3P unit actually nets
Take one product all the way through. Retail price $29.99, landed cost of goods $6.50, large standard size, sold on Amazon in the United States.
- Retail price: $29.99
- Referral fee, fifteen cents on the dollar: minus $4.50
- FBA fulfillment fee: minus $5.69
- Landed cost of goods: minus $6.50
- Advertising, at roughly a tenth of revenue: minus $3.00
- Storage, removals, returns processing: minus $0.80
Contribution per unit: $9.50.
That is the number most sellers already know in a rough form. Two parts of it are worth naming. Advertising is a real cost of being 3P, because you are responsible for driving traffic to your own offer. And the $0.80 line is the one people forget, which is why reconciled contribution is usually below the spreadsheet estimate.
What a 1P unit actually nets
Now the same product under a Vendor Central relationship. Amazon buys at a cost price, and cost price is negotiated against the retail price they intend to run. For a $29.99 shelf price, a cost price of $15.00 is a realistic starting point.
- Cost price on the purchase order: $15.00
- Accruals and allowances, roughly eight cents on the dollar across damage, marketing and co-op: minus $1.20
- Freight to the fulfillment center, prepaid: minus $0.75
- Chargebacks and shortages, averaged across a year: minus $0.35
- Landed cost of goods: minus $6.50
Contribution per unit: $6.20.
Add back what disappears. There is no referral fee, no FBA fee and no returns processing on your side, because Amazon owns the unit. Advertising is optional rather than structural: many vendors still run Sponsored Products through the Advertising Console, but a 1P product that Amazon actively merchandises can sell without it. If you strip the $3.00 of advertising from the 3P line, the gap narrows sharply.
The honest comparison is therefore not $9.50 against $6.20. It is $9.50 against $6.20 where the 1P number requires no traffic work, no inventory planning inside Amazon's network and no customer service. The 3P number is higher and it is also a job.
The cash cycle is the real difference
Per-unit margin is the number everyone compares. Cash timing is the number that decides whether the channel is survivable at scale.
Under 3P, you pay your factory, you pay freight, you ship into FBA, and the units sit until they sell. Disbursements run roughly every fourteen days, with a reserve held against returns. From the day cash leaves for a production run to the day the last unit's proceeds land, ninety to a hundred and twenty days is common, and the whole inventory position is financed by you.
Under 1P, Amazon takes ownership at receipt. Standard vendor terms are net sixty or net ninety from invoice, sometimes with an early-payment discount of two cents on the dollar for net thirty. You are financing the production run and then waiting out the terms, but you are not financing shelf time — a purchase order for 3,000 units converts to a receivable the moment the pallets are checked in, whether Amazon sells them in three weeks or three months.
Work it through on a 3,000-unit order. Under 3P, you spend $19,500 on goods plus freight and wait for sell-through at, say, 400 units a month: your money comes back over seven or eight months. Under 1P at $15.00 cost price, the same 3,000 units generate a $45,000 invoice that is due sixty days after receipt regardless of sell-through. That is the argument for 1P in a sentence, and it is a cash argument, not a margin one.
The catch is that Amazon's terms are Amazon's terms. Compare them with what a distributor or a regional chain will sign, which is usually net thirty, and the picture changes again — Amazon Business net terms covers how terms work on the B2B side of the same marketplace.
Where 1P wins
Volume you do not have to create. Amazon Retail merchandises what it owns. Placement, deal events and category promotions come more easily when Amazon carries the inventory risk.
No inventory operations inside Amazon. No restock limits to manage, no removal orders, no long-term storage surprises.
A single customer with clean paperwork. One buyer, one set of purchase orders, one invoice flow. For a brand building towards real distribution, that paperwork discipline is transferable, which is one of the quieter benefits described in Amazon seller channel expansion.
Retail credibility. A brand that ships purchase orders on terms and holds fill rate is a brand that a buyer at a regional chain can evaluate.
Where 3P wins
Price control. Amazon sets the retail price under 1P, and it can cut that price to match a competitor without asking. A price cut does not change your cost price, but it does reset the market's idea of what your product is worth, and it can pull your other channels' pricing down with it.
Margin per unit, once you are efficient. The $9.50 against $6.20 gap is real for a brand with low advertising dependence and a good conversion rate.
Speed. You change a price, a title or a variation in Seller Central in minutes. Under 1P the same change moves at the pace of a support case.
Data and direct relationship. You see search terms, conversion and customer behavior at a level that vendor reporting does not match.
How both compare to real wholesale
There is a third column most Amazon brands never draw. Selling the same product to a distributor at $14.00 or to a retail chain at $15.00 looks superficially like 1P, and the per-unit number lands in a similar place: $14.00 minus $6.50 of goods minus roughly $0.90 of pick, pack and outbound freight is $6.60 of contribution.
What differs is concentration and control. A distributor does not set your retail price, does not charge you back for a late ship window, and does not decide next quarter that your category is being de-emphasized. Several distributors are several customers. Amazon, 1P or 3P, is one.
That is why the useful question is rarely 1P or 3P. It is how much of the business depends on a single counterparty, which is the argument in Amazon dependency risk and the practical path in from FBA to wholesale.
If you want a quick read on whether a third column is even available to your product, paste the listing into WholesalePilot and the preview shows the distributors and retailers that plausibly stock products like yours.
Questions sellers ask about 1P and 3P
Can I run both at once? Yes, and many brands do, usually by putting different ASINs or pack sizes in each. The mechanics and the traps are in the Amazon hybrid model.
Does 1P mean I lose my reviews? No. Reviews attach to the ASIN, and the ASIN survives a switch in who sells it.
Is 1P margin always lower? Not always. For a product with heavy advertising dependence, the 1P number can beat the 3P number once you charge advertising honestly against each unit. Run your own version of the two lists above with your real advertising cost per unit.
Who handles returns under 1P? Amazon does, and it recovers some of that cost through damage and returns accruals negotiated into your terms.
Which one do retail buyers respect more? Neither, particularly. What a buyer at a chain asks about is case pack, lead time, fill rate and whether your Amazon price will undercut their shelf — questions covered in how to sell Amazon products in retail stores.