Podcast CAC vs Paid Acquisition CAC

The published benchmark says a B2B podcast acquires a customer for roughly $1,472 while paid search does it for $802, and that pair of numbers is the most misread comparison in B2B acquisition. We run invite led outbound for 50 plus B2B companies at a 4.6% reply rate against the 3.43% cold email average, and the acquisition cost on that book is set by send volume and close rate rather than by audience size. Below, what those 2 benchmarks are actually measuring, the formula that makes the channels comparable, and the deal size where each one wins.

What Is the Difference Between Podcast CAC and Paid Acquisition CAC?

Both numbers use the same formula. Total spend divided by customers acquired. The difference is what sits in the numerator and what the numerator buys.

Paid spend buys attention from people who did not ask for it, at a price another bidder is also willing to pay. Invite spend buys a 40 minute recorded conversation with a named decision maker, at a price nobody is bidding against.

Podcast CAC (invite led)

Every monthly cost the invite motion carries, including list, domains, inboxes, sending, scheduling, editing and the host's hours, divided by the closed deals that cohort of invites produced. Audience size does not appear anywhere in it.

Fully loaded CAC

An acquisition cost that includes labor, tooling and overhead, not just the media or vendor line. Comparing a fully loaded number on one channel against a media only number on the other is how channels get picked for the wrong reason.

Hold onto that second definition. Most of the arguments in this space are not disagreements about channels, they are 2 people using different numerators.

What Does the Published Benchmark Data Actually Say?

The sector data is worth reading closely before it gets quoted. DevriX compiled 55 sector specific B2B acquisition figures and put podcasts at $1,472 per customer, paid search at $802, LinkedIn paid social at $982, and Facebook at $230.

Lead level numbers tell a similar story. Cost per lead benchmarks by channel for 2026 put the B2B cross channel median at $198, with Google Ads at $524 per lead and LinkedIn at $202, a roughly 4x spread between the cheapest and most expensive channel on the same list.

Read the last row against the one above it. Same medium, completely different cost driver, which is exactly why a single podcast CAC benchmark cannot describe both.

Why Does the Published Podcast CAC Number Mislead You?

Because $1,472 is the cost of buying attention through a show, and an invite led show is not in that business. The audience model spends on production and promotion, waits for reach to compound, and hopes a listener self identifies. The invite model spends on getting the right buyer into the guest chair and never needs a listener at all.

Three differences do all the damage when the 2 models get averaged into one benchmark.

• The unit being bought. An audience show buys downloads. An invite show buys recorded conversations, which is the unit measuring return without downloads is built around.
• The payback window. Reach compounds over quarters. An invite lands a recording inside 30 days, so the time to first revenue is a different order of magnitude.
• Who the guest is. An audience show books guests who grow the audience. An invite show books guests who could buy, which is what the ICP gate exists to enforce before a single invite goes out.

Averaging those 2 models produces a number that describes neither. It is the same error as reporting one CAC across inbound and outbound and then wondering why neither team recognizes it.

How Do You Calculate CAC on an Invite Led Podcast?

Add every monthly cost, then divide by the closed deals that month of invites eventually produced. The second half of that sentence is where most calculations break, because deals get counted in the month they signed rather than the month of the invites that created them.

Start with the cost side. A fully loaded invite motion carries list data, domains, inboxes and warmup, the sending tool, enrichment, reply handling, scheduling, editing and publishing, and the host's hours. What a podcast acquisition system costs breaks each line out. The host's time is the line that gets dropped most often, and dropping it understates the real number by a wide margin.

Then the deal side, which runs off the funnel math rather than off hope.

So the division is your all in monthly number by 12. That single figure is more useful than any benchmark, because it is yours and it responds to things you control.

It also gives you a hard threshold. To land under the $802 paid search figure on that funnel, the whole motion has to run under about $9,600 a month fully loaded. To land under the $1,472 podcast benchmark it has to run under about $17,600. Both are arithmetic, not opinion, and both are worth writing down before you compare a single vendor.

Two intermediate metrics are worth tracking alongside it. Cost per recorded conversation moves 30 to 60 days ahead of CAC, and guest to client conversion rate tells you whether the back half is the problem or the front half is. The forecasting model walks the same stages forward with dates attached.

Why Does Paid CAC Rise While Invite CAC Holds?

Paid media is an auction. Every competitor bidding on the same job title raises the clearing price, and your offer quality has no effect on what the next click costs. That is a structural cost floor that moves against you every year, which is the core argument in cold email versus paid ads for B2B.

Invite sending has no auction. Another agency entering your niche does not raise the cost of an email, and the B2B advertising benchmarks that paid teams watch every quarter have no equivalent on the invite side. Your costs are infrastructure and labor, both of which you buy once and reuse.

What does erode on the invite side is the rate, not the price. Deliverability slipping means fewer sends reach a primary inbox, which raises CAC without changing a single line of spend. That is why domains and warmup are a CAC input rather than an IT chore, and why reply rate benchmarks get watched weekly.

The other erosion is cycle length. Salesforce found that 57% of sales professionals say the sales cycle is getting longer, which pushes closed deals into later cohorts and makes CAC look worse than it is on any 30 day read. Measure it on 90 day cohorts or do not measure it.

At What Deal Size Does a Podcast Beat Paid on CAC?

Deal size does not change the acquisition cost. It changes whether the acquisition cost is tolerable, and that is the comparison that actually decides the channel.

At a $5,000 average deal, an $802 CAC is a 16% acquisition cost and a $1,472 CAC is 29%. Both are survivable, and the channel with more volume usually wins. At a $50,000 average deal, both numbers round to noise, and the question flips entirely: which channel can produce a conversation with someone who can sign a $50,000 agreement.

That is where the recorded conversation pulls ahead and the gap widens with every zero. A form fill from a paid click gives you a name. A 40 minute interview gives you a decision maker who described their own problem out loud, on the record, before anyone sold anything. Return by average contract value runs the same math across deal sizes.

The mirror comparison is worth running too. An in house rep is the other way teams buy conversations, and the real cost of an in house SDR is the number most CAC comparisons quietly leave out when they stack a vendor against doing it internally.

What Does a Fair CAC Comparison Require?

Four conditions, and most published comparisons break at least 2 of them.

1. Both sides fully loaded. Media spend plus the salary of whoever manages it, against vendor cost plus the host's hours. Media only against fully loaded is not a comparison.
2. The same cohort window. Deals dated to the spend that created them, on a 90 day window, not to the calendar month they signed.
3. The same definition of a customer. A closed and paid customer on both sides, not a marketing qualified lead on one and a signed agreement on the other.
4. Deal size held constant. A channel that reaches smaller buyers will always show a lower CAC and a worse business. Podcast ROI explained covers why the ratio matters more than the raw cost.

Run those 4 and the comparison usually stops being close. Skip them and you can make any channel look like the best one on the list, which is roughly how most channel decisions get made.

One more note on our own side of this. We measure client work in recorded conversations rather than closed revenue, 30 recorded conversations with your ideal buyers in 90 days or your money back, because the conversations are ours to deliver and the close rate belongs to the client. That is also the honest boundary on any CAC claim an agency makes. Lowering cost per booked meeting is the lever we actually control.

The Practitioner Read on Podcast CAC

The $1,472 figure is real and it is also irrelevant to anyone running invites, which is why quoting it in either direction is a mistake. It describes a show trying to build an audience. It says nothing about a show trying to get 30 specific buyers into a guest chair.

Build your own number instead. All in monthly spend, divided by closed deals from the matching cohort, on a 90 day window, with the host's hours priced in. Compare it against a paid number assembled the same way, at the same deal size, and the answer stops being a debate.

The structural difference is the part worth remembering after the arithmetic. Paid CAC is priced by an auction you do not control and that gets more crowded every year. Invite CAC is priced by infrastructure you own and rates you can move. Over a long enough horizon those 2 curves cross, and the only question is whether you start building the one that bends down before the other one has repriced you out.