It showed up in one line item on the Q1 earnings call. Third-party seller services: $41.6 billion. Up 14% year over year.
The number barely made headlines. It should have.
Because the denominator changed. Amazon's active seller base dropped from 2.4 million in 2021 to roughly 1.65 million by end of 2025 — a 31% decline. New seller registrations hit 165,000 last year, the lowest in a decade, down 44% from 2024. Marketplace Pulse called it "The Great Compression." The era of easy entry is over.
But the fee line didn't compress. It grew. Amazon collected $41.6 billion in one quarter from a seller base that's nearly a third smaller than it was four years ago.
Run the math. $41.6 billion divided by 1.65 million active sellers is roughly $25,200 per seller per quarter. Annualized, that's north of $100,000 in fees per surviving seller. In 2021, the same math came out to roughly $39,000 per year.
The average fee load per active seller didn't go up 10%. It went up 160%.
Why This Is Actually the Bullish Number
Most people will read $41.6B and see a cost story. It's not. It's a concentration story.
Here's what happened on the other side of the ledger while 750,000 sellers disappeared:
Traffic per active seller increased 31%. Same buyer pool, fewer storefronts splitting it.
Worldwide paid units grew 15% in Q1 — the highest growth rate since COVID lockdowns.
Amazon's own first-party retail actually declined in 2025 ($255B vs. $260B in 2024).
Third-party marketplace sales grew 15% to $575 billion globally.
The number of sellers breaking $1 million annually nearly doubled — from 60,000 to over 100,000.
235 sellers now generate over $100 million a year, up from just 50 four years ago.
The marketplace didn't get harder. The floor got higher.
The sellers who couldn't run clean operations, couldn't absorb fee increases, couldn't manage advertising at scale — they're the 750,000 who left. What remains is a smaller, more professional, better-capitalized seller base competing for 31% more traffic per account.
If you survived the compression, you're now operating in the best competitive environment in four years. Most operators don't realize it because they're still running 2021 playbooks against a 2026 landscape.
The Number That Should Change Your Q3 Planning
The per-unit fee story is actually flat. Q1 unit growth was 15%. Fee growth was 14%. That means Amazon didn't meaningfully raise per-unit rates this quarter — the fee growth came almost entirely from volume.
This matters for your planning because it means the margin squeeze right now isn't coming from Amazon's rate card. It's coming from your cost stack: tariff-inflated landed costs, the 3.5% fuel surcharge that went live April 17, and advertising CPCs that averaged $1.12 across the platform (up 15.5% year over year).
The operators who are winning aren't fighting the fee line. They're fighting the three lines underneath it.
Pull your Q1 P&L. Calculate your all-in cost per unit sold — landed cost, FBA fee, referral fee, fuel surcharge, advertising cost per unit, return rate cost. If that number is within 15% of your selling price, you're running on fumes heading into Prime Day. If it's within 10%, you're already underwater and advertising is masking it.
The Brief
— Amazon Q1 2026: $181.5B net sales, $23.9B operating income, 17% revenue growth. Third-party seller services hit $41.6B (up 14%). AWS grew 28% to anchor the whole machine.
— New seller registrations hit a decade low. 165,000 in 2025, down 44%. Chinese sellers still lead at 59.9% of new launches. US-based sellers are now just 16.3% of new registrations — down from 70.8% in 2016.
— Rufus reached 300M+ customers. Interactions up 210% YoY. Q4 2025 earnings confirmed nearly $12B in incremental annualized sales from AI-driven discovery. If your listing copy is still keyword-stuffed for A9, you're optimizing for an algorithm that's losing share every quarter.
Quick Win
Compare your Q1 2026 Sessions-per-ASIN to Q1 2025.
If sessions grew more than 15% (the baseline unit growth rate), you captured more than your share of the traffic windfall. If sessions grew less than 15%, your listing is losing share even in a less competitive environment.
That's the diagnostic that tells you where to invest before Prime Day. Pull the data in Business Reports → Detail Page Sales and Traffic → filter by ASIN → compare Q1 2026 vs. Q1 2025 sessions. Flag every ASIN where session growth underperformed 15%. Those are the listings bleeding the traffic windfall to competitors with tighter content.
The marketplace just told you who it's built for now. If you're still here, the math is better than it's been in four years. The question is whether your operations match the opportunity.
Grab a 15-minute slot here and we'll walk you through the intake on the call: book a time here.
— Dan
