How Amazon Forces Sellers to Raise Prices

Amazon’s appeal rests partly on a powerful assumption: a huge marketplace, fast purchasing and prices that shoppers often expect to be among the lowest available.

But “Is Amazon always cheaper?” cannot be answered by comparing one product on one day. The more important economic question is: how are prices formed when the largest marketplace can influence what sellers are able or willing to charge outside it?

That takes the discussion beyond a single product page and into marketplace economics.

The price a consumer sees starts with the economics of the channel

Every sales channel has a cost structure.

If a seller pays higher marketplace fees, advertising costs and operating charges on Amazon, its margin there may be lower than on a direct website or a lower-cost marketplace.

In a competitive market, that difference can benefit the customer. A cheaper channel gives the seller room to offer a lower price, allowing platforms to compete not only for traffic but also on how efficiently they connect sellers and buyers.

The tension begins when a seller cannot use that lower-cost channel as freely as the economics would otherwise allow.

If a lower external price can affect Featured Offer eligibility or visibility on Amazon, a seller may decide that protecting Amazon volume matters more than passing the lower channel cost on to the customer. The practical result is that the economics of the larger platform can influence prices beyond its own website.

This does not mean every external discount automatically produces the same Amazon outcome. The broader point is that the seller’s pricing freedom across channels can be shaped by the importance of Amazon visibility.

Fiona Scott Morton: the high-fee platform can influence the market’s price floor

Competition economist Fiona Scott Morton describes the problem in market-wide terms.

Her argument is that if the largest platform charges higher fees and can effectively discourage sellers from offering lower prices through cheaper channels, the high-cost platform can help establish a higher price floor across the wider market.

The lower-cost competitor is then less able to use its cost advantage. The seller is less able to pass savings to consumers if doing so threatens access to demand on the dominant platform.

This argument does not mean every product on Amazon is more expensive than every alternative. It means the incentive structure can prevent prices outside Amazon from falling as far as they otherwise might.

Thomas Höppner makes a stronger argument

German competition-law expert Thomas Höppner takes a more forceful position, arguing that Amazon’s system is structured in a way that makes products more expensive.

That is an expert opinion, not a universal finding that applies identically to every Amazon listing.

Its value is in changing the question. Instead of asking only, “Did I find a good deal on Amazon today?” it asks, “Are competing channels fully able to use lower costs to offer lower prices?”

That is a much larger economic issue.

So is Amazon more expensive? That is not the right conclusion either

A product may be cheaper on Amazon today and cheaper elsewhere tomorrow. A snapshot comparison cannot prove the economics of the market.

The more precise conclusion is that consumers should not assume Amazon is automatically the cheapest simply because it is the largest marketplace.

Scale can create real efficiencies. It can also create market power. If marketplace rules make it harder for lower-cost channels to express their advantage through lower prices, the cheapest visible price may not reflect completely independent price competition between channels.

Consumers outside Amazon can be affected too

The most interesting part of this argument is that a shopper does not necessarily need to buy from Amazon to feel the effect of Amazon’s marketplace economics.

If a seller raises the price on its own website or another marketplace because pricing lower there could weaken its position on Amazon, customers using the alternative channel pay the higher price as well.

This is where the phrase “Amazon tax” sometimes appears as an economic metaphor. It is not a government tax. It describes the idea that the costs and rules of a dominant platform can spread indirectly into prices across the broader market.

Price is not just a number. It is the output of channel power

A shopper sees a price on a screen. Behind it sit marketplace fees, advertising, storage, visibility rules and the seller’s dependence on the channel.

None of those factors proves that Amazon is “expensive.” But they explain why marketplace size should not automatically be treated as proof that the market has reached the lowest possible price.

A platform can become large enough that it does not merely follow market prices. Its rules can influence how sellers structure prices across several channels.

Sellers face a different version of the same question

Consumers ask: where can I buy this product for less?

Sellers need to ask: can we price each channel according to its real economics, or does our dependence on Amazon push us toward similar pricing even where another channel costs less to operate?

That is where pricing and platform dependency meet.

The more important Amazon becomes to a company’s total demand, the more expensive it can feel to make a pricing decision that risks weakening visibility there.

“Cheapest” should not be treated as a permanent property of any marketplace

Price is the outcome of incentives, fees, platform rules and channel power.

The useful way to think about Amazon is therefore not as permanently “cheapest” or permanently “more expensive,” but as a major marketplace whose economics can influence pricing both inside and outside its own platform.

That makes “Is Amazon always cheaper?” a question about market structure, not merely a question about one price tag.

FAQ

Is Amazon always cheaper than other websites?

There is no basis for assuming that universally. Prices vary, and the economic issue is broader: marketplace fees and visibility rules can affect how freely sellers price other channels.

How can Amazon marketplace rules affect prices outside Amazon?

If lower external prices can weaken Amazon visibility or Featured Offer eligibility, sellers may decide to keep prices higher elsewhere in order to protect Amazon-side sales. That is a commercial incentive, not an automatic outcome in every case.

What does “Amazon tax” mean in this context?

It is a metaphor for indirect costs that can spread across the market when the fees and rules of a dominant marketplace influence seller pricing. It is not an official tax.