Podcast Revenue Calculator

Sponsors buy downloads, not subscribers

A sponsor pays a CPM (cost per mille) for every 1,000 downloads an episode earns, usually measured within the first 30 days. The sponsor funds a pre-roll, mid-roll and post-roll as separate slots, each its own sale.

The calculation is downloads divided by 1,000, times the CPM, times the number of ad slots.

That per-episode figure is then extended across the month and the year: revenue per episode times the episodes in a month gives the monthly line, and twelve of those give the annual figure, so the three timeframes are the same arithmetic repeated rather than separate guesses. All four inputs are your numbers, and the math runs in the browser with nothing uploaded.

The CPM is the variable to move

A $25 CPM is common for a host-read mid-roll, but the rate follows audience quality — completion rate and niche matter more than raw feed size. A loyal audience that listens to the end is worth more per download than a huge one that skips.

Because the CPM multiplies every download and every slot, raising it by a few dollars is worth as much as adding a chunk of new listeners.

The page prices that sensitivity explicitly: it shows what a $5 higher CPM is worth on your current audience in a month, with zero new listeners, which is why the note argues the rate - not the download count - is the number to negotiate hardest.

Revenue scales with slots and episodes

More episodes a month and more ad slots per episode multiply the money directly — an eight-episode show with two slots earns sixteen CPM sales a month.

The trade-off is audience goodwill: cramming in too many or poorly-matched ads is what turns a high CPM into a falling completion rate, which is the number that drags the CPM back down.

Slots and episodes also cap the downside of that fatigue: a show that keeps its completion rate high can add slots without dragging the CPM, because sponsors price on the audience that actually finishes the episode rather than the size of the feed that starts it.

Host-read and programmatic sit on different rate cards

Host-read sponsorships are negotiated per show and pay the premium CPMs, while programmatic ad networks fill leftover slots at much lower rates and usually land on a separate income line. The page prices the host-read model, which is the number most podcasters actually negotiate.

If a chunk of your revenue is programmatic, treat it as its own lower-CPM line rather than folding it into the host-read rate.

Because the two channels price so differently, folding programmatic into the host-read line would hide the figure that actually matters: the host-read number is the negotiable one, and keeping each stream on its own rate card is what keeps an estimate honest rather than optimistic.

What a CPM is actually buying

A CPM is a price per thousand qualifying listens, and the word qualifying is doing the work. Sponsors buy the first 30 days of downloads, not lifetime downloads: an episode that keeps growing six months later is a fine thing, but it does not push the rate on the contract up.

Completion rate is the other half of the price. Two shows with 10,000 downloads each can be quoted $18 and $30 a slot because one audience leaves after the intro - a mid-roll read at minute 12 of a 40-minute episode is worth what the share still listening at minute 12 is worth. It is the reason a smaller, loyal show out-earns a bigger, restless one, and the reason downloads alone never settle a negotiation.

Each slot is a separate sale. The ceiling of six in the form is not arbitrary: the fourth read in an episode starts costing downloads, so a host who reads four ads per episode trades audience for a rate that was not going up. The page prices slots independently for exactly this reason - two slots is a business decision, not a default.

Programmatic fill is the floor, not the rate. A host-read deal is negotiated per show and per quarter; the exchange that fills leftover inventory pays a spot price with no relationship attached. When a quote feels low, the question worth asking is which of the two it is, because they are not the same market and moving from one to the other takes a different decision.