Amazon Q3 2026 ad revenue hits $19.6bn as Prime Day shift cuts growth to 12%

Amazon's advertising revenue grew 11% to $19,637 million in the third quarter of 2026, up from $17,703 million a year earlier, according to the results Amazon published on 29 October 2026. Excluding currency effects, growth was 12%, down from 26% in the second quarter. Amazon put the slowdown down mainly to Prime Day timing, since the event moved into the second quarter in most large countries this year, and it told investors it expects advertising revenue to grow in the high teens in the fourth quarter of 2026.

Amazon's Q3 2026 advertising numbers

The figures come from Amazon's Q3 2026 earnings release filed with the SEC. In its supplemental table, Amazon reports advertising services revenue of $19,637 million for the quarter, an 11% year-over-year increase on a reported basis and 12% excluding changes in foreign exchange rates.

Amazon defines the advertising line as sales of advertising services to sellers, vendors, publishers, authors and others, through programs such as sponsored ads, display and video advertising.

The year-over-year increase works out to $1,934 million in absolute terms. That figure, and the other derived numbers in this article, are Relevant Audience's calculations from the figures Amazon published, not numbers Amazon stated itself.

Five quarters of advertising revenue

Amazon's release includes a run of quarterly figures that shows how unusual the third quarter looks. The table below lists advertising revenue and growth excluding foreign exchange as Amazon reported them.

Two things stand out. Growth excluding FX sat at 22% for four quarters in a row, rose to 26% in the second quarter of 2026 and then dropped to 12%. And in dollar terms, third-quarter advertising revenue was slightly lower than the second quarter's. By Relevant Audience's calculation, revenue fell by $172 million, or about 0.9%, from $19,809 million in Q2 to $19,637 million in Q3.

Why growth slowed: Prime Day moved

Amazon gave its explanation in two places in the release. In the guidance section it said advertising revenue grew 12% year-over-year excluding FX in the third quarter, "impacted by timing anomalies primarily related to Prime Day (and a couple other timing factors)." Amazon did not say what those other timing factors were.

In its opening highlights, Amazon reminded investors that Prime Day timing shifted this year, with the event taking place in Q2 for most large countries, whereas in 2025 Prime Day took place entirely in Q3. Amazon added that, excluding this shift, third-quarter year-over-year growth would have been about 400 basis points higher. That 400 basis point figure refers to total company net sales, not specifically to advertising. Amazon did not publish an adjusted advertising growth rate.

When the event moves from one quarter to another, both quarters' comparisons are distorted: the quarter that gains it looks stronger and the quarter that loses it looks weaker.

A Prime Day-neutral way to read the quarter

One way to remove the calendar effect is to combine the two quarters that Prime Day moved between. By Relevant Audience's calculation from Amazon's figures, advertising revenue for Q2 and Q3 2026 together was $39,446 million, against $33,397 million for Q2 and Q3 2025. That is an increase of about 18.1%. This is a rough check, since it uses reported figures rather than FX-adjusted ones and cannot separate out the "couple other timing factors" Amazon mentioned, but it suggests the underlying business did not slow as sharply as the 12% headline implies.

Two more derived figures help with scale. Adding the last four quarters, Q4 2025 through Q3 2026, gives about $78.0 billion of advertising revenue on a trailing twelve-month basis. And advertising was about 9.7% of Amazon's total net sales of $201,944 million in the third quarter. Both are Relevant Audience's calculations.

What Amazon guided for Q4 2026

Amazon said: "We expect year-over-year advertising revenue to grow in the high teens in fourth quarter 2026." That is the only advertising-specific forward statement in the release, and Amazon did not give a dollar figure.

To put the guide in context, the comparison base is $21,317 million, Amazon's advertising revenue in Q4 2025. If "high teens" is read as roughly 17% to 19%, that would imply fourth-quarter advertising revenue of about $24.9 billion to $25.4 billion. This range is Relevant Audience's illustration of the guide, not an Amazon forecast, and the actual result could fall anywhere Amazon's "high teens" wording covers.

For the company as a whole, Amazon guided fourth-quarter net sales of $240.0 billion to $247.0 billion, growth of 12% to 16% on the fourth quarter of 2025, and operating income of $28.5 billion to $33.5 billion, compared with $25.0 billion a year earlier. It also said it continues to expect 2026 cash capital expenditures of about $220 billion.

The rest of Amazon's quarter, briefly

Amazon's total net sales rose 12% to $201.9 billion in the third quarter, from $180.2 billion in the third quarter of 2025, or 13% excluding a $0.9 billion unfavourable foreign exchange impact. AWS segment sales increased 39% to $46.0 billion. Operating income rose to $28.1 billion from $17.4 billion a year earlier.

Those numbers matter to advertisers only indirectly. They show that the advertising slowdown happened in a quarter when the rest of the company grew strongly, which supports Amazon's framing of the ad figure as a timing issue rather than a demand problem. They do not prove it, and the fourth-quarter result will be the real test of the guide.

Amazon Ads Agent and Full-Funnel Campaigns: context, not new

The release lists two advertising product highlights. Amazon says it introduced Amazon Ads Agent for advertisers, bringing its full offering under "a single, AI-first platform," backed by trillions of shopping, browsing and streaming signals, which supports advertisers with insights, answers and the ability to take action on their behalf. It also says it launched Full-Funnel Campaigns in Amazon Ads Agent for all U.S. advertisers, bringing sponsored ads, display, video and streaming TV into a single campaign, where advertisers provide initial inputs and Amazon's AI plans, executes and continuously optimises the rest.

Relevant Audience covered the Amazon Ads Agent rebrand and the Full-Funnel Campaigns launch when they were announced at unBoxed 2026, in a post published on 30 September 2026. The earnings release adds no usage, adoption or performance figures for either product, so it gives no evidence yet of how much of the quarter's ad revenue ran through them.

The release also includes Prime Video viewership figures, which matter because streaming TV is now one of the formats inside Full-Funnel Campaigns. Amazon says the fifth season of Thursday Night Football on Prime Video averaged 17.7 million viewers through six games, according to Nielsen, and that the second season of NBA on Prime debuted in more than 200 countries and drew more than two million U.S. viewers for its season-opening doubleheader. The release does not report Prime Video advertising revenue separately.

What advertisers should take from the numbers

For brands and sellers already spending on Amazon Ads, the practical points are about comparison and planning rather than strategy changes:

• Compare your own Q3 2026 Amazon ad results against Q3 2025 with Prime Day timing in mind. If your Prime Day spend moved from Q3 to Q2, a quarter-on-quarter or year-on-year drop in Q3 may reflect the calendar, as it did in Amazon's own total.
• Read your Q2 and Q3 results together when judging the year. Amazon's combined figure is a reasonable model for doing the same with your own account data.
• Expect Q4 auctions to stay busy. Amazon's high-teens guide for Q4 advertising implies continued spend growth on the platform in the holiday quarter. Amazon did not say whether that growth comes from more advertisers, higher prices or more inventory, so treat any CPC assumptions as your own.
• Treat Full-Funnel Campaigns as something to test with clear controls. Amazon has given no performance data in the release, so any decision to consolidate sponsored, display, video and streaming TV into one automated campaign should rest on your own measured results.

What this means for Thai marketers

Amazon's release contains no figures for Thailand or the wider region, so this is not a story about the Thai market directly. It is relevant in two narrower ways.

Thai brands and exporters that sell through Amazon in other countries face the same seasonality. If you sell into the U.S. or Europe on Amazon, the Prime Day shift affects how your own quarterly ad results compare, and the Q4 guide is a signal about how busy the holiday auctions are likely to be.

For marketers in Thailand who mostly buy retail media on regional marketplaces, Amazon's figures work as a benchmark for how large retail media has become: about $19.6 billion in a single quarter that Amazon itself calls distorted by timing. The same planning habit applies locally. When a marketplace's big sale event changes date, compare results across the affected periods together rather than quarter by quarter. If you are planning Q4 retail media budgets for an online store, our e-commerce marketing team can help structure spend across marketplaces, and if part of that budget sits in search, our Google Ads management service covers the search side.

FAQ

How much did Amazon make from advertising in Q3 2026?

Amazon reported $19,637 million in advertising services revenue for the third quarter of 2026, up from $17,703 million in the third quarter of 2025. That is 11% growth on a reported basis and 12% excluding foreign exchange.

Why did Amazon's ad growth slow to 12%?

Amazon attributed the slowdown mainly to Prime Day timing, plus "a couple other timing factors" it did not describe. Prime Day took place in Q2 for most large countries in 2026, whereas in 2025 it fell entirely in Q3.

What does Amazon expect for Q4 2026 advertising?

Amazon said it expects year-over-year advertising revenue to grow in the high teens in the fourth quarter of 2026. It gave no dollar figure; against Q4 2025's $21,317 million, a 17% to 19% range would imply roughly $24.9 billion to $25.4 billion, which is Relevant Audience's illustration, not Amazon's.

Did Amazon say how Full-Funnel Campaigns are performing?

No, the earnings release lists Amazon Ads Agent and Full-Funnel Campaigns as highlights but gives no usage, adoption or performance figures. Advertisers who test them have to rely on their own measurement.

Does this affect advertisers in Thailand?

Only indirectly, because the release includes no figures for Thailand. Thai sellers who advertise on Amazon in other countries are affected by the same Prime Day timing and Q4 demand, and the numbers are a useful benchmark for retail media generally.

The bottom line

Amazon's advertising business slowed sharply on paper in Q3 2026, from 26% to 12% growth excluding FX, and Amazon blamed the calendar. Read across Q2 and Q3 together, the business still grew by about 18% on Relevant Audience's calculation, and Amazon is guiding to high-teens growth for the holiday quarter. The useful step for advertisers is to apply the same calendar logic to their own results before drawing conclusions. If you would like help planning Q4 retail media or reading your own year-on-year numbers, Relevant Audience can work through them with you.