Vendor Central vs Seller Central Advertising: What Differs

Vendor Central vs Seller Central advertising comes down to who owns the sale. A seller (3P, third-party) sets the price, holds the stock and counts ad sales as its own revenue, while a vendor (1P, first-party) sells to Amazon, so its ads promote Amazon's offer at Amazon's price and the vendor earns its cost price on the units Amazon orders. The ad types are almost the same, but the attribution window, the sales data you judge ads against and the way you calculate TACoS (ad spend ÷ total sales) all differ.

Vendor Central vs Seller Central advertising at a glance

Most of the differences sit behind the ad console, in who controls the offer and what a rupee of ad sales is worth to you.

The ad menu is nearly the same: both can run Sponsored Products, Sponsored Brands and Sponsored Display, and both can buy Amazon DSP (see when to move to Amazon DSP). So the 1P vs 3P Amazon ads question is about how you judge ads, not which ones you can buy.

Who controls price, stock and the Buy Box?

A seller sets its own price and stock, and those drive its chance of holding the Buy Box. In Amazon vendor advertising, Amazon controls all three, and together they decide whether an ad runs at all.

Amazon serves a Sponsored Products ad only while the product is in stock and the advertised offer holds the featured offer, the Buy Box. For a seller, that offer is your own. For a vendor, it is Amazon's: when Amazon runs out, or a third-party seller holds the featured offer on your product, your Sponsored Products ads for it stop, with no change in your ad account.

• Price. Sellers set price, coupons and deals. Vendors can fund promotions through Vendor Central, but Amazon sets the everyday price and can change it without asking.
• Stock. Sellers see their own units and plan restocks. Vendors can see Amazon's sellable stock and open purchase orders, but Amazon decides how much to order.
• Buy Box. Sellers can track their featured offer (Buy Box) percentage per product in Business Reports. Vendors need to check that Amazon's own offer is the one shown, because their ads depend on it.

How do attribution windows differ for vendors and sellers?

Sponsored Products credits a purchase to an ad for 7 days after the click in a seller account and for 14 days in a vendor account. Sponsored Brands and Sponsored Display use 14 days in both. Three things follow.

1. The same ads look cheaper on a 14-day window. ACoS (advertising cost of sale) is ad spend ÷ ad-attributed sales. A 14-day window also credits second-week purchases, so the same clicks show an equal or lower ACoS. Sponsored Products data from the Amazon Ads API includes both windows, so compare accounts on the same one.
2. Recent days are unfinished. Purchases keep arriving until the window closes, so the latest 7 days of a seller's Sponsored Products data and the latest 14 days of a vendor's will still rise. We judge a bid change only on days whose window has closed.
3. Blended numbers mix windows. In a seller account, Sponsored Products (7 days) sits beside Sponsored Brands and Sponsored Display (14 days), so an account total mixes both.

What sales data do you judge ads against?

Sellers judge ads against their own orders. Vendors judge them against Amazon's retail sales, which are not their own revenue.

A seller sees every order in Seller Central, from ads or not, with the fees charged on each, so ad results can be checked against real margin every day.

A vendor sees Amazon's retail sales reporting in Vendor Central: the units shoppers bought from Amazon and the revenue at Amazon's price. The vendor's own revenue comes from Amazon's purchase orders, which follow sell-through with a lag and depend on the stock Amazon already holds. That has two effects:

• Ads that lift sell-through this month may reach your invoices next month, or not at all if Amazon is already overstocked.
• Retail sales data arrives later than a seller's order data, in our experience often by a few days. So a vendor's latest TACoS is incomplete twice over: the attribution window is still open and sales are still arriving.

How is TACoS calculated for vendors and sellers?

For a seller, TACoS is one number. For Amazon vendor advertising, calculate it twice: at Amazon's price, to compare with the market, and at your cost price, to compare with your margin.

TACoS = ad spend ÷ total sales (ad-attributed plus organic) in the same period

A seller takes total sales from its own orders. A vendor needs its cost price for each product to work out the second version. Our guide to TACoS vs ACoS covers how to read the trend.

Worked example (illustrative figures, tax left out). Say a product sells for ₹1,000 on Amazon and your cost price to Amazon is ₹600. In a month you spend ₹60,000 on ads, ads are credited with 300 units, and Amazon sells 1,000 units in total.

A seller with the same price and results would see the left-hand column, as its own revenue. The vendor should set the right-hand column against margin. If Amazon then cuts its price to ₹850 and the ads still bring 300 units, ACoS at Amazon's price rises to 23.5% (₹60,000 ÷ ₹2,55,000) while ACoS at cost price stays at 33.3%, because you still receive ₹600 a unit. The console number moved; your return didn't.

How should vendors and sellers set bids and budgets?

Set a seller's bids from its margin at its own price. Set a vendor's bids from the margin on its cost price, converted into the ACoS the console shows at Amazon's price.

Break-even ACoS = profit per unit before ad spend ÷ price the shopper pays

Break-even CPC = price × break-even ACoS × conversion rate

CPC is cost per click and conversion rate is orders ÷ clicks. For a target bid, put your target ACoS into the second formula.

Worked example (illustrative figures). Take the same ₹1,000 product and a 10% conversion rate.

• Seller. Say you keep ₹250 a sale before ads, after Amazon's fees, GST and product cost. Break-even ACoS is 25% (₹250 ÷ ₹1,000) and break-even CPC is ₹1,000 × 25% × 10% = ₹25. Our free Amazon profit calculator works out the fees and GST for your product.
• Vendor. Say you sell to Amazon at ₹600, the product costs you ₹360 to make and deliver, and the allowances in your vendor terms take ₹60, leaving ₹180 before ads. Break-even ACoS at Amazon's price is 18% (₹180 ÷ ₹1,000) and break-even CPC is ₹1,000 × 18% × 10% = ₹18.

In this example, the vendor's ceiling is ₹7 a click lower for the same product and shoppers. A vendor may run above that line to keep sell-through strong so Amazon keeps reordering; make that call deliberately, with the cost-price numbers in front of you. If ACoS is already above break-even, our guide to fixing a high ACoS shows where to look first.

Budgets follow the same split. A seller caps spend on a product by its stock (weeks of cover = units available ÷ units sold per week) and spends less once cover falls below the restock time. A vendor caps spend by Amazon's stock and purchase orders, because spending hard on thin stock only brings the stockout forward. If your vendor ad account runs on funds paid in advance, keep the balance ahead of planned spend: an empty balance stops every campaign at once.

What should you do when price or stock moves?

A seller can fix the cause. A vendor mostly adjusts to it and takes the cause up with Amazon.

Which model suits a brand's advertising?

Seller Central suits brands that want price, promotions, stock and margin in their own hands. Vendor Central suits brands that would rather sell in bulk to Amazon; advertising then means keeping sell-through strong at a price you don't set, on data that arrives later. Some brands run both and choose product by product.

ScaleSKUs reads each ad account's type from the Amazon Ads API, so a vendor account is measured on 14-day Sponsored Products data with TACoS against Amazon's retail sales, and a seller account on 7-day data and its own orders. Every number comes from Amazon's official APIs; how it works explains the connection.

Frequently asked questions

Can vendors and sellers run the same Amazon ad types?

Yes. Sponsored Products, Sponsored Brands and Sponsored Display are open to both, for products in eligible categories. Sellers need Amazon Brand Registry for Sponsored Brands and Sponsored Display, and Amazon DSP is open to both.

Why does a vendor account's ACoS look better than a seller account's?

Mostly the window: vendor Sponsored Products results credit purchases for 14 days after a click instead of 7, so the same clicks earn more attributed sales. The vendor figure is also at Amazon's retail price, not your cost price. Compare on the same window, and judge the vendor at cost price.

Can a vendor control the price shown in its ads?

No. Amazon sets the retail price of the products it buys from vendors and can change it at any time. A vendor can fund promotions through Vendor Central and negotiate its cost price, but day to day the job is to adjust bids to the price Amazon sets.

How should a brand selling both 1P and 3P set ACoS targets?

Set them per account, since the 1P and 3P sides run in separate ad accounts. Give the vendor account a target built on cost-price margin and 14-day Sponsored Products data, and the seller account one built on its own margin and 7-day data. When you report the two together, state which window and which sales figure each number uses.