Australian audio advertising has split in two. The audience moved to podcasts, with half the country listening monthly, while ad dollars stay parked in broadcast radio, the one part of audio now shrinking. This is a channel-allocation and trust story, and your audio budget has almost certainly not followed your audience.
A host read is a recommendation from someone your customer chose to spend an hour with. A radio spot is an interruption between songs. Priced the same, they are not the same buy.
The Take: Your audio budget is a photograph of where your audience stood five years ago. Broadcast radio still reaches most of the country every week, but the dollars you keep feeding it are chasing a format that is shrinking while the one your customers actually chose keeps growing. Rebalance the split before your next plan locks the old one in for another year.
Why is your audio money still parked in the wrong place?
Half of Australians aged 10 and over listen to podcasts every month, yet total audio ad spend is set to fall 4.1% to $1.2 billion in 2026, with the decline landing squarely on radio.
That gap is the whole story. According to WPP Media's midyear forecast, total audio ad spend in Australia will slide 4.1% to $1.2 billion in 2026. The same forecast has the wider ad market growing 7.4% to $31.1 billion, which leaves audio as the one big category going backwards while almost everything around it climbs. The fall is not spread evenly across the format either. It sits in broadcast radio, the part of audio that carries the biggest line in most media plans.
You are not backing radio because it out-earns the alternative. You are backing it because it turns up with a ratings sheet you already know how to read.
The audience already picked
Radio is not finished. Any operator who tells you otherwise has not read the figures. Infinite Dial Australia 2026 from Edison Research still puts broadcast radio at a weekly reach of 88% of Australians, about 18 million people. That reach is genuine and you should keep paying for it.
Look at the trajectory though. The same Edison Research study found 45% of Australians now listen to podcasts weekly, about 12 million people, a habit that barely registered a decade ago. Monthly listening has crossed past half the population.
Australians aged 10 and over who listen to podcasts every month, per Infinite Dial Australia 2026
The money is starting to notice, slowly. IAB Australia reports digital audio ad revenue reached $353 million in FY26, up 6.6%. The June quarter set a podcast record of $40 million, up 22.6% on the previous quarter, the strongest single quarter podcasting has posted here.
This is where the public number meets ours. Podcasting is up 10.1% year on year while radio drags the total down. Across the hundreds of Australian businesses whose marketing capability we have scored, the same habit repeats: money follows the familiar report, not the audience. Operators fund the channel that produces a tidy dashboard and starve the higher-trust channel that resists one. Audio is the clearest case we have measured of a budget set by habit rather than by where the audience actually sits.
What are you actually buying when you buy radio?
Two things get muddled every time this comes up. Reach and momentum are different measures. A channel can be enormous and shrinking at the same time. The table below puts the two audio worlds next to each other.
Sources: Infinite Dial Australia 2026 (Edison Research) for reach, WPP Media and IAB Australia for spend and direction.
Read the table as a portfolio, not a contest. Radio buys you scale on a given morning. Podcasts buy you a listener who opted in and stayed to the end. The mistake is not owning radio. The mistake is letting radio own the entire audio line by default while the growth column gets a token slice or nothing at all.
What I would do about it
Pull your last twelve months of audio spend and split it into broadcast radio versus digital audio. Most operators have never seen that ratio written down. If podcasts are under 10% of your audio dollars while your own customers sit near the national average, your split is a relic.
Then do this. Ring-fence a test budget of 15 to 25% of your audio spend and move it into podcasting for two quarters. Do not fund it from your brand budget. Fund it out of radio, so the comparison stays honest.
Buy host-read placements in shows your actual customers listen to, not the biggest chart by raw download count. Ask every podcast seller for downloads, listen-through rate and audience profile before you commit a dollar. If they cannot give you listen-through, treat that as a mark against the buy.
Set a measurement frame before you spend, not after. Use a unique landing page or promo code per show and a simple pre and post brand-lift question in the survey you already run. Hold radio to the same test in the same window. You are comparing two buys on one scorecard, which is the step most buyers skip.
Review at ninety days. Keep what pays, cut what does not and reset the split from evidence rather than from last year's plan.
Now the methodology. Our read here is directional. We score the marketing capability of Australian businesses across a fixed set of dimensions. The pattern above comes from that body of work rather than from any one client. It tells you where the market drifts, not what your exact number should be. If you want the frame, you can see how we score.
This is my opinion, not a law of physics. Radio will keep working for plenty of businesses and podcasting will not rescue a weak offer. What I am sure of is that a budget you have not questioned in five years is not a strategy, it is inertia wearing a strategy's clothes. If you want a second set of eyes on the split, see how we pressure-test a media plan.
Frequently asked questions
Should I cut radio entirely?
No. Radio still reaches 88% of Australians weekly and delivers mass reach that podcasts cannot match yet. The point is rebalancing toward growth, not walking away from reach.
How much of my audio budget should go to podcasts?
There is no fixed number, but if podcasts are under 10% of your audio spend while half your market listens monthly, you are almost certainly under-weight. Test with 15 to 25% and let the results set the ongoing split.
Is podcast advertising harder to measure than radio?
It is different, not harder. Podcasts give you promo codes, unique URLs and listen-through data that broadcast radio cannot. The catch is that host-read trust is real and does not show up cleanly on a dashboard, which is exactly why habit-bound buyers discount it.
Why is audio ad spend falling if audiences are growing?
Because the falling part and the growing part are different formats. Broadcast radio spend is dropping and drags the total down, while digital audio and podcasting rise underneath it. The category average hides the split.