Oxford Road Issues ''State of Audio Advertising 2025''

RADIO ONLINE | Wednesday, August 27, 2025 | 2:51pm CT

Oxford Road

Oxford Road unveiled its State of Audio Advertising 2025 report during the third annual Chief Audio Officer Summit, highlighting both the rapid growth and ongoing challenges facing the podcast and audio advertising ecosystem. The report shows that U.S. podcast ad spend is projected to reach $2.55 billion in 2025, a 47% jump since 2022, according to eMarketer.

Streaming also rose 9% over the same period, while radio spend declined 6% to $10.3 billion. Despite radio's retreat, the medium still commands the largest share of total audio advertising due to its unmatched daily reach, with 60% of Americans aged 13+ tuning in each day.

Oxford Road notes podcast listening has more than tripled over the past decade, with YouTube now accounting for 25% of U.S. podcast consumption. But the surge has also brought confusion: unclear definitions of what constitutes a podcast, fragmented measurement standards, and inconsistent ROI frameworks are slowing advertiser confidence and spend.

The report frames 2024 as a pivotal year when podcasts moved into the mainstream of national influence. President Donald Trump's reliance on podcasts as a campaign tool led the press to dub it "The Podcast Election." Long-form, host-led shows demonstrated their ability to shape voter perception at scale, attracting major political and commercial spending.

Meanwhile, high-profile talent moves -- including Trevor Noah and "Call Her Daddy" joining SiriusXM, and "New Heights" moving to Wondery -- illustrated the ongoing volatility of creator contracts and exclusivity deals.

Oxford Road identifies attribution as the industry's most urgent challenge. Brand marketers in its "What Brands Want" survey cited limited performance data as the biggest barrier to increasing podcast investment. In fact, 76% said they would boost spending if YouTube podcasts offered measurement capabilities comparable to embedded pixel attribution.

Without alignment, the report warns, the channel's growth could be stunted despite its strong engagement and lower ad clutter compared to TV and social media.

To address fragmentation, Oxford Road is spearheading the Alliance for Measurement in Podcasting (AMP Task Force), bringing together top-spending brands, platforms, publishers, and measurement specialists. The group will work on standard definitions, performance attribution, and consistent audience measurement.

Oxford Road also proposed a standard definition of a podcast: "An audio-driven on-demand program rooted in the spoken word... accessed via open RSS feeds or other distribution platforms and often supplemented by video."

"Audio has never been louder, broader, or more fragmented, but that fragmentation can be our growth engine," the report concludes. "If we align on practical ways to clear the noise, we can double the size of this industry before our next State of Audio Advertising report."