BARC India (Broadcast Audience Research Council) is India's television audience measurement body. For decades it measured only linear TV viewership via its BAR-O-Meter panel. In 2021, BARC launched its OTT measurement initiative — a significant expansion into streaming and connected TV audiences that is still maturing as of 2026. Understanding what BARC measures for OTT, where it falls short, and how it differs from linear TV ratings is essential for any India CTV planner using audience data to justify spends.
BARC OTT measurement overview
BARC's OTT measurement programme (launched as part of the BARC–Nielsen alliance initiative) aims to provide currency-grade audience data for digital video consumption. The framework measures OTT viewing on connected devices — smart TVs, mobile phones, tablets, and desktops — using a panel-based methodology supplemented by census-level data from participating platforms.
The measurement operates through two tracks:
- Panel-based measurement: A sample of households with metered devices that track viewing behaviour across TV screens and connected devices. Panel size for OTT is smaller than the linear TV panel (which covers 60,000+ homes), and OTT panel recruitment and retention are ongoing challenges.
- Platform-reported data: Participating OTT platforms (JioHotstar, Zee5, SonyLIV, and others) share viewing data directly with BARC under confidentiality agreements. This census-level data provides volume; the panel provides demographic attribution.
BARC OTT data is published on a monthly basis (not weekly as for linear TV) and is accessible to BARC subscribers — primarily broadcasters, agencies, and major advertisers.
What BARC measures for OTT
BARC's OTT measurement framework tracks:
- Monthly active users (MAU): Unique users who accessed the OTT platform at least once in the measured month. Platform-level, not content-level.
- Total viewing time (TVT): Aggregate hours spent on a platform by all measured users in the month.
- Content-level viewership: For participating platforms that share content metadata, BARC publishes viewership data by show — enabling content-level comparisons across platforms.
- Device breakdown: Share of viewing on TV screens vs mobile vs desktop. This is the CTV-specific data that is most relevant for CTV advertisers — it helps establish what share of a platform's audience is reached on a large TV screen.
- Demographic profile: Age, gender, and SEC (socioeconomic classification) of OTT viewers, estimated from panel data.
BARC OTT vs linear TV ratings
| Dimension | BARC Linear TV | BARC OTT |
|---|---|---|
| Measurement frequency | Weekly (ratings published every Thursday) | Monthly |
| Panel size | 60,000+ homes, nationally representative | Smaller panel; ongoing expansion |
| Granularity | Programme-level, time-slot level, minute-by-minute | Platform-level and show-level; no minute-level |
| Currency status | Established trading currency — GRPs bought and sold against BARC ratings | Not yet a buying currency — informational, not transactional |
| Advertiser use | Direct campaign planning and post-campaign reporting | Reach and platform selection; not used for GRP-based buying |
| Platform participation | Mandatory for free-to-air broadcasters | Voluntary — not all OTT platforms participate fully |
The critical gap: BARC OTT data is not yet a transactional currency for India CTV. Advertisers cannot buy CTV on a GRP-equivalent basis using BARC OTT data the way they buy linear TV. CTV campaigns are still bought on CPM and impression-count terms, with BARC data used for context and directional planning rather than transactional measurement.
How advertisers use BARC OTT data
In practice, India advertisers and agencies use BARC OTT data for three purposes:
Platform selection and budget allocation: BARC OTT data validates which platforms have the most viewers and the most viewing time. JioHotstar's dominance in MAU and TVT, confirmed by BARC, justifies the premium CPMs it charges. For smaller platforms claiming large audiences, BARC data is a useful cross-check against publisher-reported numbers.
Audience profiling: The demographic breakdown from BARC OTT (age, gender, SEC) is used to assess whether a platform's audience matches a campaign's target. A brand targeting SEC A urban women in the 25–44 age group can use BARC OTT demographic data to compare platforms.
Linear-to-digital audience extension planning: For advertisers running both linear TV and CTV, BARC data helps estimate the incremental reach that CTV adds beyond their linear TV buy — which audiences are watching OTT but not the same content on linear TV.
Limitations of BARC OTT data
Platform participation is incomplete. Not all India OTT platforms participate in BARC's OTT programme. Smaller AVOD platforms, FAST channels, and regional OTT operators may not share data, leaving gaps in the measurement picture.
CTV-specific data is aggregated. BARC OTT data shows total viewership across all devices. The share of viewing on TV screens (CTV-specific) is reported but not broken out at the content level — a planner cannot determine from BARC what percentage of Zee5 crime drama viewers watched on a connected TV versus mobile.
Monthly cadence limits campaign use. Weekly BARC linear ratings let planners adjust TV buys mid-flight. Monthly OTT data is too slow for in-campaign optimisation — by the time data is published, the campaign may be over.
Panel representativeness for CTV is uncertain. The OTT panel is weighted toward mobile viewing, reflecting India's mobile-first internet population. CTV-specific viewership — particularly in tier 2 and tier 3 cities where connected TV adoption is newer — may be underrepresented in BARC OTT estimates.