Why Your YouTube RPM Dropped: You're Comparing the Wrong Months

Comparing this month to last month is the wrong test for RPM. Here's the comparison that actually works, why Q1 is structurally your weakest ad quarter, and the three things that cause a genuine decline.

If you're staring at YouTube Studio trying to work out what you broke: check the comparison before you check the content.

Almost everyone diagnoses RPM by comparing this month to last month. That comparison is close to useless. RPM moves with the advertising calendar, and the advertising calendar makes any two adjacent months a bad pair. Compare the same month against the same month a year earlier instead. Do that first and a lot of "my RPM is dying" panics resolve in about ten minutes.

January is the loudest version of this — the ad year resets and RPM drops with it — but the same mistake manufactures false alarms in any month that follows a stronger one.

Below: the proof that the Q4-to-Q1 dip is structural, how to run the year-over-year check, and the three things that actually cause RPM to trend down.

First, what RPM is measuring

RPM is your revenue per 1,000 views, calculated after YouTube's revenue share. Per YouTube's ad revenue analytics documentation, it bundles ads, channel memberships, YouTube Premium revenue, Super Chat and Super Stickers into one number.

Two consequences for diagnosis:

• Because it's a blend, RPM can't tell you which revenue source moved. A membership churn event and an ad market dip look identical in the RPM line.
• Because the denominator counts views that carried no ad, RPM falls when the share of unmonetized views rises, even if your revenue is flat. YouTube says so directly: "your RPM may go down when there's an increase in unmonetized views, even if your revenue was the same."

Worth noticing what that list leaves out. Everything a brand pays you sits outside it — the fee, the product they shipped, whether it was a gift or a loan you still owe back, which video it ran in. None of that appears in Studio at any date range, so a falling RPM tells you nothing about whether your actual income fell. That side of the business needs its own record: a spreadsheet, or something like VidCRM.

The Q1 dip is real, and it's the whole ad market

You don't have to take a blog's word for advertiser seasonality. Alphabet reports YouTube ad revenue every quarter, and the Q4-to-Q1 drop shows up in every one of the last five years:

Figures from Alphabet's quarterly earnings releases (Q4 2022, Q1 2023, Q4 2024, Q1 2025, Q4 2025, Q1 2026); each release also carries the prior year's figure, and percentage changes are calculated from those numbers.

So the drop is constant in direction and variable in size: somewhere between 12% and 21% over these five years, with the worst of them in 2022. Anyone quoting you a fixed seasonal percentage is quoting one year of it.

Now look at the same Q1 figures year over year instead:

• Q1 2023 vs Q1 2022: −2.6%
• Q1 2024 vs Q1 2023: +20.9%
• Q1 2025 vs Q1 2024: +10.3%
• Q1 2026 vs Q1 2025: +10.7%

Same data. Every quarter that looks like a catastrophe against December looks ordinary, or good, against the previous January. And note 2023, the one year in five that came back negative — that's the test working. A year-over-year comparison that goes red is telling you something real happened; a month-over-month one that goes red is mostly telling you the calendar moved.

Where this evidence stops: it's Alphabet's total YouTube ad revenue, not your RPM — your channel won't track it precisely, and your niche may swing harder or softer than the platform average. And it's a revenue total, not a rate. Since YouTube's viewership doesn't shrink by that much every January, the drop in revenue per view is reasonably inferred to be at least as steep as the drop in the total — but that's my inference from the aggregate, not a figure Google publishes.

YouTube's help pages confirm the mechanism without quantifying it, and they're specific that it's CPM that fluctuates: "Advertisers tend to bid higher or lower depending on the time of year. For instance, many advertisers bid higher just before holidays." CPM is what advertisers pay per thousand ad impressions; RPM is what lands in your account per thousand views. They're different metrics, but the auction sits upstream of both — when advertisers bid less for your impressions, less revenue reaches the numerator of your RPM.

Run the comparison properly

In YouTube Studio, open Analytics, go to the Revenue tab, and set a custom date range for the month in question. Then compare it against the same calendar month a year earlier — either with the built-in compare option or, if you can't find it, by noting the figure and setting a second custom range manually. Advanced mode gives you the fuller report and lets you export the data. YouTube's revenue reporting page states it plainly: "It takes 2 days for revenue to show in YouTube Analytics." So the tail end of your range will read low until it fills in — wait out the lag before you conclude anything, and expect more drift than that between what Studio estimates and what you're finally paid.

What you're looking for:

• Same month, similar or higher RPM than last year → seasonality. Nothing is wrong. Stop looking.
• Same month, materially lower than last year → something structural changed. Keep reading.

If you have less than a year of monetization history you can't run this test yet, and you should be extremely reluctant to conclude anything from a month-to-month move. A channel whose first monetized months were October through December and then panicked in January mistook the best quarter of the year for its baseline.

The three causes of a genuine RPM decline

Seasonality ruled out, these are the things that actually push RPM down as a trend.

1. Your audience geography shifted

The most common real cause, and the easiest to miss, because it can happen while your views are growing. YouTube's documentation is explicit: "Different locations will have different levels of competition in the ad market, so CPMs will vary by geography."

If a video breaks out in a market where advertisers bid less, your view count goes up and your RPM goes down at the same time. The channel is doing better; the per-thousand rate is doing worse. Both are true.

Check it under Geography, and compare your revenue-by-country breakdown against your views-by-country breakdown. If the top countries in each list have drifted apart over 12 months, you've found your answer.

One thing to know before you go looking: YouTube publishes no official CPM or RPM benchmarks by country, so there is no authoritative table to check yourself against — the per-country figures circulating online are estimates built from whatever private samples their authors had.

2. Shorts became a bigger share of your views

Shorts and long-form are monetized through entirely different machinery. Long-form ads are auctioned against the individual watch page. Shorts revenue comes from ads running between videos in the Shorts Feed, pooled monthly and allocated on a separate track — how that pool is calculated and what share of it reaches you is a subject of its own. What matters for diagnosis is that YouTube treats them as separate systems: "Shorts views exclusively receive ad revenue sharing from the Shorts Feed, which is separate from long-form video monetization on the Watch Page," per YouTube's Shorts monetization policies.

Channel-level RPM blends the two anyway, and the counting rules differ by format. The documentation is precise about the denominator: "For Shorts, it includes all engaged views. For Videos, it includes all views." Different counting rules per format, one combined ratio at channel level. So as Shorts grow as a proportion of your total, your blended RPM drifts toward the Shorts rate — even if neither format's own rate changed at all.

Isolate it: in Advanced mode, filter the revenue report so Shorts and long-form are separated, and read each format's revenue and RPM on its own. If long-form RPM held steady and only the blended figure fell, you have a mix shift, not a monetization problem.

Creators consistently report Shorts RPM landing well below long-form, and the pooled-versus-auctioned mechanism explains why that would be. YouTube publishes no comparative rate, though, so that remains shared experience rather than a measurement, and any exact multiplier you've read came from somebody's own channel.

3. More of your catalogue is limited-monetization

Videos that fall outside the advertiser-friendly content guidelines pick up a "Limited ad earnings" or "No ad earnings" notice and run reduced ads or none, which pulls down the channel average. One flagged video is noise. A creeping accumulation, as your subject matter drifts toward covered territory, is a trend.

Those notices show up in the Notices column on your Content page — read down it and see whether they cluster in recent uploads. From that same column you can appeal an ad suitability restriction on videos that are eligible for one, and it's worth checking your video against the guidelines before you spend it, because you get exactly one: "After your one appeal, the reviewer's decision is final, and the video's monetization status won't change."

And a fourth thing, which isn't a cause

Not every view carries an ad. The same documentation defines estimated monetized playbacks as "The number of times your video was watched with ads," and the reasons a given view may carry none include the viewer's geography, whether they have a Premium subscription, and the advertiser's own targeting.

So yes: when a smaller share of your views carries ads, RPM falls. But that share is almost always moving because of one of the three causes above, not independently of them. Read it as confirmation that you've identified the right cause, not as a diagnosis in itself.

The ten-minute check

1. Is the drop between a holiday quarter and the one after it? If yes, assume seasonality.
2. Compare the month against the same month last year. Recovered? You're done.
3. Still down year over year? Compare views-by-country against revenue-by-country across 12 months.
4. Separate Shorts from long-form in Advanced mode and check long-form RPM in isolation.
5. Read the Notices column on your Content page and look for a cluster of recent "Limited ad earnings" flags.

If 3 through 5 come back clean and you're genuinely down year over year, you're probably looking at a broader ad market movement in your category. The auction isn't exposed to creators — you can't see which advertisers bid on your inventory, or at what price — and nobody outside Google knows the seasonal magnitude for your specific niche. The direction is well established; the size is only knowable from your own year-over-year history, which is the argument for keeping one.

One structural thing worth internalizing: Q1 is supposed to be your weakest ad quarter. Creators who plan around that don't experience it as a crisis.

The RPM line is a rate, not a verdict. Read it against the same month last year and it'll tell you something true.