1P vs. 3P Ecommerce: Compare Vendor and Marketplace Seller Models

1P vs. 3P describes whether a retailer (first party, or 1P) buys and resells your goods or a marketplace seller (third party, or 3P) lists and sells them directly to the shopper. On Amazon, 1P means you act as a vendor selling wholesale to Amazon (Vendor Central); 3P means you sell on Amazon’s marketplace as a seller (Seller Central), and that difference changes who controls inventory, pricing, shipping, returns, and how you get paid.

Direct answer: under the 1P (vendor) model Amazon is your customer and controls retail price, customer fulfillment, returns policy execution and invoice settlement terms; under the 3P (marketplace) model you (the seller) control listing price and commercial decisions, while Amazon may handle fulfillment if you use FBA but does not own your inventory.

How Inventory And Fulfillment Differ

1P (Vendor): You receive purchase orders from Amazon and ship inventory to Amazon’s warehouses according to PO terms or EDI. Once Amazon takes title, it owns the inventory and is responsible for consumer order fulfillment and last-mile delivery.

3P (Marketplace Seller): You retain title until sale. Two common 3P flows are:

• Fulfilled By Merchant (FBM): You pick, pack and ship orders to customers and handle returns according to marketplace rules.
• Fulfilled By Amazon (FBA): You ship inventory to Amazon fulfillment centers under FBA — Amazon stores, picks, packs and ships customer orders but you still own inventory until sale.

Pricing Control And Promotions

1P: Amazon sets the retail (customer-facing) price and runs promotions. Vendors negotiate wholesale costs, cooperative advertising, and promotional allowances with Amazon; pricing visibility and promotional cadence are controlled by Amazon Retail.

3P: You set the listing price and control promotions, coupons and buy-box strategy (although Amazon’s repricing algorithms, competing sellers, and policies influence outcomes). Using FBA often improves buy-box share but does not transfer pricing authority to Amazon.

Shipping, Returns And Customer Experience

1P: Amazon manages customer shipping, tracking, customer service and returns under Amazon Retail policies. Your operational obligation is to fulfill POs to Amazon’s receiving requirements (packaging, labeling, EDI, inbound routing). Noncompliance can generate chargebacks.

3P: If you use FBM, you manage shipping speed, carriers and return handling yourself within Amazon’s seller requirements. If you use FBA, Amazon handles shipping and returns for customer orders; returned goods are processed into your FBA inventory (subject to disposition rules).

Settlement, Fees And Cashflow

1P: Amazon pays vendors per agreed payment terms (commonly net-30, net-60, or negotiated terms) against vendor invoices. Amazon may apply chargebacks, allowances and deductions (e.g., for PO noncompliance, chargebacks for incorrect EDI, freight claims) that affect net receipt.

3P: Sellers receive disbursements from Amazon on a regular cycle (commonly every 14 days for many accounts), net of referral fees, variable closing fees and—if using FBA—fulfillment fees, storage fees and any service charges. Sellers also bear returns cost (though FBA has return processing rules) and may face account-level reserves or holds for risk reasons.

Worked Amazon Example (Hypothetical Inputs)

Scenario: SKU A, consumer retail price target $25 per unit.

• Hypothetical 1P Flow: Vendor sells to Amazon at a negotiated wholesale unit cost of $10. Amazon buys 1,000 units via PO and pays on net-30. Amazon sets customer price at $25, fulfills orders, and handles returns. Vendor’s revenue = $10 × units sold to Amazon. Vendor pays inbound freight and PO compliance costs unless contract specifies otherwise. Vendor has limited control over retail price or promotions.
• Hypothetical 3P Flow (Seller using FBA): Seller lists SKU A at $25. Amazon referral fee (example 15%) = $3.75. FBA fulfillment fee (example) = $3.50. Net to seller before cost of goods sold = $25 − $3.75 − $3.50 = $17.75. If seller’s COGS is $8/unit and inbound shipping to FBA $0.75/unit, gross margin differs from 1P but seller controls price and promotional activity. Amazon disburses payment per seller settlement cycles (e.g., every 14 days), not by PO invoice.

Interpretation: In this example the 1P vendor collects $10 per unit quickly against a PO with agreed payment terms (stable purchase but limited upside), while the 3P seller earns the retail margin minus fees and retains price control (higher upside but higher operational responsibility and fee exposure).

Checklist: Compare 1P And 3P Across Key Operational Areas

• Inventory Ownership: 1P—Amazon owns after PO receipt; 3P—you keep title until sale (including FBA until the sale event).
• Pricing Control: 1P—Amazon sets retail; 3P—the seller sets price (subject to Amazon policies and competition).
• Shipping & Fulfillment: 1P—Amazon ships to customers; 3P—FBM seller ships, FBA Amazon ships on seller’s behalf.
• Returns Handling: 1P—Amazon handles returns end-to-end; 3P—FBA handles returns processing, FBM sellers handle returns directly.
• Settlement Terms: 1P—PO invoicing with negotiated payment terms (net-30/60 and chargebacks); 3P—frequent disbursements from Amazon less fees (e.g., 14-day cycles).
• Fees & Deductions: 1P—wholesale price negotiation, potential marketing/co-op fees and chargebacks; 3P—referral fees, FBA fees, storage and advertising fees.

Practical Tips For Deciding Between 1P And 3P

Evaluate cashflow needs (1P provides predictable PO revenue; 3P disbursements follow sales cadence), margin targets (compare negotiated wholesale vs. retail margin after seller fees), operational capacity (can you meet Amazon PO and EDI requirements, or do you prefer to control listings and pricing?), and desired control over branding and price promotions.

Negotiate clear PO terms and chargeback policies if considering 1P; if 3P, optimize FBA prep and labeling to reduce inbound errors and storage fees and control buy-box competitiveness through price, availability and performance metrics.

Regulatory note: Amazon’s specific program names and terms are Vendor Central (1P) and Seller Central (3P); FBA is a fulfillment option available to 3P sellers. Check Amazon’s official program pages and your agreements for current operational and payment terms before onboarding.

In short, the 1P vs. 3P choice determines who owns inventory, who sets price, who ships and who collects payment: 1P hands those responsibilities to Amazon in exchange for wholesale purchase relationships; 3P preserves seller control and upside but brings marketplace fees and operational responsibilities. Choose the model that matches your margin targets, cashflow needs and operational capabilities.