What is Listen-Through Rate (LTR)?
Listen-Through Rate (LTR) is a key performance metric in radio and audio advertising that measures the percentage of listeners who hear an audio ad in its entirety. If 100 people start listening to a 30-second ad and 75 complete it, the LTR would be 75%.
Unlike visual media where engagement is obvious, audio advertising requires a different approach to tracking effectiveness. LTR provides crucial insight into whether your message is compelling enough to hold attention from start to finish – essential for radio spots, podcast ads, and streaming audio campaigns.
Why LTR Matters
Listen-Through Rate is fundamental to evaluating audio campaign performance in the UK market. Radio remains a significant channel, reaching over 35 million UK adults weekly, making LTR essential for assessing whether your creative is working.
A high LTR indicates that: - Your creative holds listener attention - The ad placement resonates with the audience - Your message is clear and engaging - You're achieving better return on investment
Low LTR suggests listeners are skipping or tuning out, which means your creative or targeting may need adjustment.
Where LTR is Used
Traditional Radio: Broadcast radio stations and commercial networks (Capital, Heart, BBC Radio 1) use LTR data to demonstrate ad value to agencies and brands.
Podcast Advertising: Increasingly important for dynamic and host-read ads where listener completion directly correlates with message retention.
Streaming Audio: Platforms like Spotify, Apple Music, and Amazon Music track LTR for programmatic audio buying, allowing real-time optimisation.
Audio Programmatic: When buying audio inventory programmatically in the UK, LTR helps optimise campaigns across multiple publishers simultaneously.
LTR vs Related Metrics
While LTR measures completion, it's worth understanding related metrics:
- Impressions: How many people heard the ad start
- Click-through Rate: (Less relevant for audio, more for display ads)
- Brand Lift: Whether the ad changed perception or purchase intent
- Frequency: How often listeners hear your ad
Practical Application
When planning an audio campaign for Connect Media Group clients, LTR helps determine: - Which radio stations or podcasts deliver the best engagement - Whether creative needs refreshing mid-campaign - How to allocate budget across different audio channels - Real cost-per-completion for comparison with other media
A typical benchmark for UK radio commercials ranges from 70-85%, though this varies by daypart, station format, and ad length. Podcast ads often achieve higher LTR (80-90%) due to audience loyalty.