Pre-roll vs mid-roll: which podcast slot to sell

Pre-roll vs mid-roll starts with where the ad runs: pre-roll comes before your content and mid-roll sits inside the episode. Post-roll comes after the show ends. Each one sells a different slice of your audience, so price them as separate products because that is what a sponsor is buying.

The ranking looks obvious until you try to prove it. Delivery evidence, not intuition, is what settles a placement argument with a buyer.

What each placement actually is

A pre-roll sits near the top of the file, before or immediately after your cold open. Every listener who starts the episode passes through it.

A mid-roll sits at a break inside the content. On a long-form show that usually means one break somewhere near the middle, or two breaks spaced through a 90-minute episode. The listener has already decided the episode is worth their time, which is the whole reason this slot commands more.

A post-roll runs after the content is finished, often after the outro. Some listeners are gone by then. Others are physically gone, having left their phone playing in another room.

Those positions exist in both ad models. In a baked-in read, the ad is recorded into the audio file itself, so as the IAB Tech Lab puts it in its Podcast Measurement Technical Guidelines v2.2, "everyone who downloads the file gets the same ads" and targeting is limited. In dynamic insertion, an ad server picks the ad at the moment of the file request and drops it into designated ad breaks. Our dynamic ad insertion guide covers the plumbing behind that.

Pre-roll vs mid-roll vs post-roll at a glance

Why mid-roll carries the premium

Nobody pays more for mid-roll because the audio sounds better in the middle. They pay for the filter in front of it.

That filter pushes the ad closer to the part of the show where the host has already earned some credibility. A recommendation landing after 20 minutes of useful conversation reads differently from one landing before the guest has said a word. That is the effect our host-read ads guide unpacks in more detail.

The trade-off is volume. Fewer people reach the mid-roll than reach the pre-roll, and how many fewer depends entirely on your show. Two podcasts with identical download counts can have very different mid-roll audiences, which is why a sponsor who asks "how many people actually hear the break?" is asking the right question and usually gets a vague answer.

Pre-roll wins on the other side of that trade. It is the only placement where the audience for the slot is close to the audience for the episode, and that makes it simple to price and simple to verify.

The measurement rule that decides post-roll

The IAB Tech Lab guidelines state that when ads are dynamically inserted into the podcast file or within an ad break, 100% of the ad content, meaning all bytes, must be downloaded before it can be counted as delivered.

The guidelines go further with an example: a 30-second pre-roll inside a download that never reached one full minute of content cannot be counted as valid, even if the ad itself downloaded completely. The ad rides on the validity of the download that carries it.

Push that logic to the end of the file and post-roll is exposed twice over. It needs the download to be valid, and it needs the request to have travelled far enough to pull the ad bytes at the very end. Any listener who bails at the outro, and any player that stops requesting once the content is done, takes that impression with them.

This is also why your ad server's delivered number and your raw download number will not match. If that gap is new to you, what counts as a podcast download explains the filtering underneath both figures.

What the placement is worth

Libsyn Ads publishes format ranges in its podcast advertising guide: $24 to $26 for baked-in host reads, $18 to $22 for dynamic insertion into a new episode, $14 to $16 for full or back-catalogue insertion, and $12 to $15 for programmatic. Those are seller rate card figures, not measured market averages, and they split by format rather than by position.

That absence is the useful signal. Placement pricing is a negotiation inside your own rate card, not an industry constant you can look up. The workable approach is to set your base CPM from comparable inventory, using our podcast CPM benchmarks as a reference point, then price the three slots relative to each other with your own delivery evidence behind the spread.

A defensible spread looks like this:

1. Quote mid-roll at your top rate and be ready to explain the retention behind it.
2. Quote pre-roll below it, and lean on the fact that it reaches the widest share of your audience.
3. Bundle post-roll rather than pricing it separately, unless a sponsor specifically wants an end-of-episode call to action.
4. Separate the line items on the proposal so a buyer can see what they dropped if they cut the budget.

Before you add another break

More slots is the fastest way to raise revenue on paper and the fastest way to lose the audience that made the inventory worth buying.

Run the check on your own show. Take the episodes where you already have a break, look at where listening falls away, and compare that against episodes without one. Then look at the same pattern over a 90-day window, because a single episode tells you about that episode and nothing else. If completion drops consistently after your existing mid-roll, a second break is not free inventory. You are trading completion rate for slot count, and completion is what makes the slots sellable.

Podder gives you the per-episode delivery and audience detail behind that judgement, so the retention argument you make to a sponsor rests on a number they can check rather than a claim about how engaged your listeners are.

Start Podder Analytics and price each slot from what your episodes actually deliver.