Amazon Buy Box: how the Featured Offer is chosen in 2026, and how brands keep it

The Buy Box decides who makes the sale when more than one seller offers the same product. For a brand, it decides something else as well: whether the traffic you paid for converts into your sales or a reseller’s. This guide explains how Amazon chooses the winner under the rules in force in the UK today, how to read the one number that tracks it, and what to do when you lose it. It is one part of running a large catalogue, which our hub on running a complex Amazon account covers end to end.

What the Buy Box (Featured Offer) is

Amazon now calls it the Featured Offer: “the offer that appears with Add to Basket/Buy Now buttons in the Offer Display on a Product Detail Page"¹. Amazon evaluates all the offers on the page to decide which is most attractive to the customer. When no single offer is clearly better, the Featured Offer can rotate between the best ones, and offers that are not featured stay available in the All Offers display¹.

Three details matter more than they first appear:

• It is decided per variation. Each size or colour is a separate ASIN, so you can hold the Featured Offer on some variations and not others¹⁴.
• Different shoppers can see different winners. The Featured Offer can change with the customer’s delivery location, their Prime membership and filters such as delivery date¹.
• Business customers are compared on VAT-exclusive prices on Amazon.co.uk, where those prices are available¹.

To check a single product, open its page: if your name is on the Add to Basket offer, you hold it; if you appear under other sellers, you don’t⁴.

What changed on 20 July 2026

Until this summer, a seller had to pass an eligibility step, based on seller performance, before its offers were even considered. Amazon announced that “on 20 July 2026, we’ll remove the seller eligibility requirements for the Featured Offer for sellers in the EU and UK”, adding: “We’re not changing how the Featured Offer is selected"³. The UK help pages that described eligibility now say they have been removed, and that “offers from all sellers are now eligible to be evaluated for the Featured Offer"²¹².

Two cautions. First, Amazon’s own pages are not perfectly aligned: the main UK help page dates the change to “September 2026"¹, while the removed pages and the announcement say 20 July²³. Second, the Amazon Ads help page on the Featured Offer, last updated on 16 July 2026, still lists an order defect rate below 1% as an eligibility factor⁶. We treat the Seller Central pages as the current rule, and keep the order defect rate low anyway, because seller performance still counts in selection.

The practical effect is that more offers now compete. Resellers who used to fail the eligibility step can now win your Featured Offer on price and delivery alone.

The factors Amazon names

Amazon says it ranks qualified offers “in the same way for every product” and never uses manual overrides¹. It names these factors:

Amazon also lists what it does not consider: customer reviews and star ratings, the Prime badge on its own, and fulfilment method when all other factors are equal¹.

Then there are the pricing checks. Pricing Health shows offers that are “currently ineligible to become the Featured Offer” because they aren’t priced competitively against retailers outside Amazon, or are priced significantly higher than recent prices on Amazon or elsewhere⁷. Amazon’s reference prices include the current Featured Offer price, the 60-day average selling price, the list price and the per-unit price of a smaller bundle⁷. It also flags offers that are eligible and priced within 5% of the Featured Offer price, where a small change could win it⁷. Its fair pricing policy adds that it may remove the Buy Box from offers whose pricing harms customer trust⁸. This is why a product can lose the Featured Offer with no competitor on the page: your own website, or another retailer, is selling it cheaper.

How to read Featured Offer % in Business Reports

The number to track is Featured Offer percentage, in the Detail Page Sales and Traffic reports.

Amazon’s glossary says it falls below 100% when the product was out of stock, when the Featured Offer would have sold the customer another seller’s offer, or when your offer wasn’t available through the Featured Offer at all⁵. You can chart it over time from the By Date report by adding the Featured Offer percentage column to the graph⁷.

Our free Profit X-Ray reads the same Business Report in your browser and flags the listings losing the Featured Offer.

What losing it costs: sales and wasted advertising

Advertising stops. Amazon Ads states that Sponsored Products, display and Sponsored Brands campaigns “generate 0 impressions if the advertised ASIN or SKU doesn’t hold the Featured Offer”, even while the campaign shows “Delivering” in the campaign manager⁶. When the Featured Offer shifts to a competitor, impressions for the previous holder stop immediately, and if several SKUs share one ASIN, only the SKU holding the Featured Offer can serve⁶. Nothing alerts you: the dashboard simply goes quiet.

The traffic you paid for converts for someone else. Money spent outside Amazon, on influencers, Google or email, still sends shoppers to the page. If a reseller holds the button, much of that traffic buys from them.

Here is what that looks like on one product. The referral fee follows Amazon’s published UK rate for Home Products above £20, and the digital services fee its 2% rule⁹; the other costs and volumes are illustrative.

Matching the price costs £1,224 a month against a normal month, but losing the Featured Offer costs £2,970. That is why brands defend it. It is also why a price war is only a stopgap: the reseller can follow you down. The lasting fix is upstream, in who can buy your stock.

Resellers, pricing and UK law

This is where many brands, and many agencies, give advice that is a legal risk in the UK. “Enforce your MAP” is standard in American playbooks. We don’t advise it.

The Competition and Markets Authority defines resale price maintenance as a supplier requiring a retailer “not to resell the supplier’s products below a specified price”, and says it can be imposed indirectly, including where a supplier “prevents or limits your ability to advertise lower prices online (so-called ‘minimum advertised price policies’)“¹⁰. Recommended resale prices are lawful only “if the retailer can still resell at whatever price it wants to"¹⁰. Retailers are liable too: the CMA fined GAK, a musical instrument retailer, £278,945 for agreeing with a supplier not to discount online prices¹⁰.

Amazon will not do it for you either. It says violations of exclusive or selective distribution agreements “do not constitute intellectual property rights infringement” and that “it would not be appropriate for Amazon to assist in enforcement activities"¹¹. Its brand protection tools remove counterfeits and infringements, not genuine products sold cheaply.

Our guide to Amazon for manufacturers sets out what the CMA allows on distribution in more detail, and Amazon Transparency and Project Zero explains when the counterfeit tools are worth their cost. Brand Registry, which sits underneath both, is covered in our UK Brand Registry guide.

Where the Featured Offer fits in running the account

On a small catalogue you can check the Featured Offer by eye. On a large one, it becomes an exception report: every week, the products that lost the most page views to another seller, to a stockout or to a pricing flag, each with an owner and an action. Our complex account hub shows how that report sits alongside catalogue governance, variation structure and account health, and our break-even ACoS guide shows how to tell whether the advertising you restart afterwards is making money.