Photo by Angèle Kamp on Unsplash
Verdict: Amazon holds between 35.7% and 40.5% of U.S. e-commerce as of July 2, 2026 — but independent pricing research shows it beats Walmart on price in only about 22% of comparisons. In five specific product categories, the gap is large enough to cost regular shoppers real money every month.
22 percent. That is the share of head-to-head price matchups where Amazon actually comes out cheaper than Walmart, according to retail pricing research cited by AI Fallback. For a platform that spent a decade synonymous with low prices, that number is worth pausing on.
The mechanism is not complicated. Third-party sellers now represent more than 50% of unit sales on Amazon as of 2026, and those sellers face combined fees totaling up to 50% of their total revenue — a 15% referral fee, 20–35% for FBA fulfillment, and up to 15% in advertising costs, per data from Zenventory and TheStreet. Effective April 17, 2026, Amazon added a 3.5% fuel and logistics surcharge on top of existing fulfillment charges. Those costs do not disappear — they migrate directly into the price you see at checkout.
The Evidence: 5 Categories With Documented Price Gaps
1. Baby Formula and Infant Nutrition
This is the starkest case in the dataset. As of July 2, 2026, NBC News documented that baby formula sold by third-party sellers on Amazon can run more than 45% above in-store prices. Specialty formula offers more alarming examples: Neocate Junior was listed at $320 on Amazon versus a $175 regular retail price — a markup exceeding 300%. Parents facing acute shortage situations may have limited alternatives, but for routine, planned purchases, pharmacy chains and warehouse clubs consistently undercut Amazon's third-party listings on identical products.
2. Groceries and Food and Beverage
This is the only category where both Walmart and Target beat Amazon on price, according to Kiplinger's comparative pricing research. As of July 2, 2026, Walmart's food and beverage prices average 4.61% below Amazon's; Target runs 7.30% lower. On a $200 weekly grocery order, that translates to $9.22 to $14.60 in avoidable spending — every single week. For standard packaged goods, the competitors are not merely close; they are consistently and measurably cheaper.
3. Products With Inflated "Reference Prices"
Consumer Watchdog examined 4,000 Amazon product listings and found that nearly 40% used reference prices — the crossed-out "was $X" figures — that were not charged by any other retailer. Amazon's reference prices averaged $18.88 higher than the market mean for the same items. A retail pricing analyst quoted in the research described the strategy plainly: Amazon shows genuine low prices on a handful of high-visibility, comparison-checked products, hoping customers conclude "that the site has the cheapest prices for everything." The catch is that the discount is measured against a benchmark no one else uses. Call it urgency theater with arithmetic attached.
4. Specialty and Niche Third-Party-Only Products
When no first-party Amazon listing exists and a category is populated entirely by third-party sellers, competitive pricing pressure largely disappears. Sellers in niche categories — specialty supplements, imported accessories, hard-to-find components — face less friction and can hold prices well above what direct brand sites or specialist retailers charge. The FTC's 172-page antitrust complaint, filed ahead of Amazon's October 2026 bench trial, alleges the platform "strong-arms small sellers into paying outlandish fees in order to succeed on its monopoly e-commerce platform — fees that then force those sellers to raise the price of their products." The consumer class action certified in August 2025, covering hundreds of millions of buyers from third-party purchases, makes the same underlying claim.
5. Safety-Certified Consumer Products
The U.S. Consumer Product Safety Commission identified 400,000 faulty products on Amazon, including defective CO detectors and non-compliant children's sleepwear. The pricing dimension here is subtle but real: bargain-priced third-party listings in safety-sensitive categories often undercut branded alternatives by shedding the certification itself. At this price, a CO detector that does not meet UL standards is not a deal — it is a liability. Here is what matters: the cheapest Amazon listing in a certified product category is not always a substitute for the product it appears to be selling. The price comparison becomes meaningless when the products are not actually equivalent.
Chart: Percentage savings when purchasing at selected retailers versus Amazon pricing. Grocery figures per Kiplinger comparative pricing research; baby formula figure reflects the minimum documented third-party seller premium on Amazon versus in-store retail, per NBC News reporting as of July 2, 2026.
What It Means
Amazon adjusts prices on millions of products daily, with high-competition SKUs updated every 10 minutes according to platform data. That algorithm is calibrated to win the sale in a visible comparison environment — not to maintain the lowest price across all categories. The FTC antitrust complaint scheduled for an October 2026 bench trial goes further, alleging that Amazon's covert pricing algorithms actively influence competitor pricing and create an effective price floor across the broader e-commerce ecosystem. As of July 2, 2026, Amazon and Shopify together control 49.7% of U.S. e-commerce — a duopoly concentration that has, paradoxically, reduced the intensity of price competition in Amazon's dominant segments.
A consumer advice expert quoted in the research summarized the current reality without hedging: "Most of the time, Amazon's not cheap anymore. It's about convenience. So if you're about the lowest price, Amazon ain't it most of the time."
How to Act on This
Groceries and food staples — Skip Amazon. The 4.61% to 7.30% savings at Walmart and Target is consistent across multiple independent pricing sources and is not narrowing. Walmart+ grocery delivery functions as a direct substitute for Amazon Fresh at a lower price point in most U.S. markets.
Baby formula — Skip third-party Amazon listings. Check the identical product at a pharmacy chain, warehouse club, or through the manufacturer's direct subscription program before defaulting to Amazon. A documented markup range of 45% to 300% makes comparison-shopping non-optional, not optional.
Products with a "was $X" reference price — Wait and verify first. Browser extensions that track Amazon price history (CamelCamelCamel is the standard tool) expose when a "discount" is measured against a reference price that only ever existed on Amazon's own listing. If the price history shows the current "sale" price has been the default price for months, it is not a sale. It is the price.
Niche third-party specialties — Compare before buying. For any listing where a third-party seller is the sole source, check the brand's own website and at least one specialist retailer. Combined fee burdens of up to 50% of seller revenue leave structurally no margin for Amazon to be the low-cost channel.
Safety-certified products — Pay for the verifiable brand. CO detectors, children's sleepwear, car seats: buy from a recognized brand with documented certification. In categories where the CPSC has flagged 400,000 faulty Amazon products, selecting the cheapest listing is not a neutral financial choice.
Frequently Asked Questions
Is Amazon always the cheapest place to buy?
No. As of July 2, 2026, Amazon beats Walmart on price in approximately 22% of direct comparisons, according to retail pricing research. Amazon remains competitive in electronics and certain fast-moving branded goods, but consistently loses on price in groceries, food and beverage, and categories dominated by third-party sellers carrying high combined fee burdens of up to 50% of revenue.
What should you not buy on Amazon?
Based on current pricing research as of July 2, 2026, the weakest-value categories on Amazon are: groceries and food (Walmart is 4.61% cheaper, Target is 7.30% cheaper per Kiplinger); baby formula from third-party sellers (documented markups of 45% to 300% above in-store prices per NBC News); products carrying Amazon-only reference prices (Consumer Watchdog found nearly 40% of such reference prices are not charged by any other retailer); and safety-certified products where the CPSC has identified 400,000 faulty Amazon listings.
Why is Amazon so expensive now?
The primary structural cause is the platform's shift to third-party sellers, who now represent over 50% of unit sales and face combined fees totaling up to 50% of revenue. Those costs flow directly into listed prices. A 3.5% fuel and logistics surcharge, effective April 17, 2026, pushed seller costs higher still. The FTC's antitrust case, scheduled for an October 2026 bench trial, alleges Amazon's fee structure is a direct and intentional cause of elevated prices both on and off the platform — not an unintended side effect.
Bottom line: In my analysis of the available pricing data, Amazon's convenience premium has quietly become a price premium across too many everyday categories to ignore. The platform is still genuinely competitive in electronics, fast-moving branded consumer goods, and anything Prime-shipped with no viable local alternative — that advantage is real and should not be dismissed. But for groceries, baby nutrition, niche third-party listings, and anything carrying a suspect reference price, the math has shifted away from Amazon, and the structural causes outlined in the FTC's October 2026 trial complaint suggest those conditions are not resolving quietly on their own. The practical rule is simple: one tab open on Amazon, one tab open on a competitor. In these five categories, the competitor tab wins more often than most shoppers realize.
Disclaimer: Prices and deal availability change frequently. Always verify current pricing before purchasing. This post represents original editorial commentary based on publicly reported research and does not constitute independent product testing or personal use recommendations. Research based on publicly available sources current as of July 2, 2026.