The Amazon flywheel: what it is, and what it means for a brand's profit

Few business diagrams are quoted as often as Amazon’s flywheel. Sellers hear it in conference talks, agencies put it in pitch decks, and it gets searched as often as “Amazon flying wheel” as by its right name. Most explanations stop at the circle of arrows. This guide covers where the idea came from, in Amazon’s own words where they exist, what it means for a brand that sells on Amazon, and the one test that tells you whether your own flywheel is making you money.

It is part of our guide to selling on Amazon in the UK. For how Amazon search turns sales into rank, read our Amazon SEO guide.

Where the Amazon flywheel came from

The flywheel is Jim Collins’s image before it is Amazon’s. In Good to Great he described how lasting results come from “relentlessly pushing a giant, heavy flywheel, turn upon turn, building momentum until a point of breakthrough"⁴. No single push makes the difference; each turn builds on the last.

Collins says Amazon took the idea up “coming out of the dot-com bust in 2001”, and then went further by naming the specific drivers of its own flywheel⁵. Brad Stone’s history of the company, The Everything Store, describes the loop Jeff Bezos and his team sketched, quoted here by Stratechery: “Lower prices led to more customer visits. More customers increased the volume of sales and attracted more commission-paying third-party sellers to the site. That allowed Amazon to get more out of fixed costs like the fulfillment centers and the servers needed to run the website. This greater efficiency then enabled it to lower prices further. Feed any part of this flywheel, they reasoned, and it should accelerate the loop.“⁶

That is the famous napkin drawing. Its parts are simple:

The flywheel in Amazon’s own words

Amazon’s leaders have returned to the idea in their letters to shareholders. In his 2014 letter, Jeff Bezos explained why Fulfilment by Amazon mattered so much: “FBA is so important because it is glue that inextricably links Marketplace and Prime.” When a seller joins FBA, he wrote, “their items can become Prime eligible”, which makes Prime membership more valuable, and “This is powerful for our flywheel.“¹

Andy Jassy’s 2024 letter, published in April 2025, describes the decision that opened the store to other sellers in the same terms of customer choice: “Why not let customers choose the selection, price, and delivery speed they prefer from among these millions of sellers?“²

The numbers show how central sellers have become. In the second quarter of 2026, third-party sellers accounted for 61% of the units Amazon sold. Amazon earned $46.8bn from third-party seller services and $19.8bn from advertising in that quarter, with advertising up 26% on a year earlier³.

What the flywheel means for a brand

Read from a brand’s side, the flywheel has three consequences.

It brings you traffic. The loop works to send more shoppers to Amazon every year, and you can sell to them without building that audience yourself.

It pushes on your price. The loop exists to lower prices for customers. Every seller competing for the same shoppers is part of that pressure, and Amazon’s systems reward the offer that serves the customer best, as our Buy Box guide explains.

It charges for access. Selection grows, so standing out costs more. On top of the referral fee, 15% for most categories plus a 2% digital services fee on UK fees⁸, most brands now pay for visibility through advertising. Amazon’s advertising revenue growing faster than its seller services revenue³ is a sign of where sellers’ money is going.

None of that makes Amazon a bad place to sell. It means that growth on Amazon and profit on Amazon are different things, and the flywheel will happily deliver the first without the second.

Your own flywheel: the loop that matters to you

A brand on Amazon has a smaller flywheel inside Amazon’s. Ours, in practice, looks like this:

1. A listing that converts turns traffic into sales.
2. Sales and reviews raise conversion further: published research finds a product with five reviews is 270% more likely to be bought than one with none⁹.
3. Sales history earns organic rank, because Amazon search rewards products that shoppers click and buy, as our Amazon SEO guide sets out.
4. Organic rank lowers the advertising cost of each sale, because more sales arrive without a click you paid for.
5. The margin released funds the next product, the next listing improvement or the next keyword.

Set side by side, the two loops share a shape but not a goal:

One turn, in numbers

Here is what a single turn looks like when it works, for the £24.99 product in our break-even ACoS guide, which keeps 26.5% of its £20.83 ex-VAT price before advertising.

Sales rose 15% and profit rose 28%, without spending another penny on ads. That is the flywheel working for the brand: the gain came from conversion and rank, not from buying more traffic. The rule of thumb we use is that a healthy turn shows sales up and TACoS down in the same month. Sales up with TACoS up means you are paying for the momentum, which is fine for a launch and a warning sign anywhere else.

Each step is a lever on profit, and each can be pushed the wrong way. Discounting buys sales that may not earn rank for long. Advertising above break-even buys sales history at a loss. Neither is wrong as a deliberate, time-limited choice. Both are wrong as a habit.

The test: does each turn add margin?

The formula from our break-even ACoS guide is the simplest way to check whether your flywheel is spinning forwards:

Amazon Ads reports attributed sales without VAT⁷, so put total sales on the same basis before you compare.

Brand A grew sales by 50% and lost 25% of its profit. Brand B grew sales by 30% and made 43% more. On a sales dashboard Brand A is winning. On the bank statement Brand B is. Brand A’s flywheel is turning, but each turn takes margin out; it will need ever more advertising to hold its rank, and it has less money each month to pay for it.

Making your flywheel spin profitably

Check the flywheel monthly with three numbers: profit after advertising, TACoS and its direction, and organic share of sales. Our TACoS benchmarks guide shows what healthy looks like at different stages.

When the flywheel spins backwards

Momentum works in both directions. The patterns we see most often in accounts we are asked to review:

• Stock-outs. Sales stop, rank falls, and the restart needs advertising you didn’t budget for.
• A falling rating. Conversion drops, so every ad click costs more per sale, so advertising gets cut, so sales fall further.
• Price wars. Matching every competitor’s cut keeps the volume and drains the margin that paid for advertising.
• Advertising as the engine rather than the starter. If sales only hold while ad spend rises, the flywheel isn’t turning; you are pushing it every minute.

Where the metaphor misleads

The flywheel is a useful picture, but two parts of it are easy to take too literally.

A flywheel doesn’t spin for ever on its own. Collins’s point was that momentum builds from consistent effort, turn after turn, and that no single push creates the breakthrough⁴. On Amazon, competitors push too. A product that reached the top of its search results last year keeps its place only while it keeps converting better than the products around it. Treat rank as something you rent with conversion, not something you own.

Amazon’s flywheel and yours have different owners. Amazon’s loop is built to grow Amazon’s customer base by giving those customers lower prices, more selection and faster delivery, and its letters say so plainly¹². Your interests overlap with that, because more shoppers are good for you, but they are not the same. When Amazon’s flywheel asks for a lower price or a faster delivery promise, the question for a brand is whether the extra sales earn back what the change costs. Sometimes they do: Prime eligibility through FBA is the example Bezos gave in 2014. Sometimes the answer is to hold the price and accept fewer, more profitable sales.

In each case the fix starts with the same question we ask of every turn: did this make the business more money, or just more sales?