What is ROAS for CTV advertising?

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Last updated: April 8, 2026

Quick Answer: ROAS (Return on Ad Spend) for CTV (Connected TV) advertising measures the revenue generated per dollar spent on ads streamed to internet-connected televisions, with industry benchmarks typically ranging from 2:1 to 5:1. According to a 2023 IAB report, CTV ROAS averages 3.5:1, outperforming traditional TV's 2:1 average. Key factors include precise targeting through first-party data and attribution via device IDs, enabling direct measurement of conversions like purchases or app installs. Major platforms like Roku and Amazon Fire TV provide ROAS metrics through integrated analytics dashboards.

Key Facts

CTV ROAS benchmarks range from 2:1 to 5:1, averaging 3.5:1 as of 2023
Traditional TV ROAS averages 2:1, making CTV 75% more efficient
CTV attribution relies on device IDs like Roku ID for measuring conversions
First-party data targeting can boost CTV ROAS by 40% compared to demographic targeting
Major CTV platforms include Roku (43% US market share), Amazon Fire TV (35%), and Apple TV (12%)

Overview

ROAS (Return on Ad Spend) for CTV (Connected TV) advertising emerged around 2015 as streaming services like Netflix and Hulu gained popularity, creating new ad inventory beyond traditional linear TV. CTV refers to internet-connected television devices including smart TVs (Samsung, LG), streaming sticks (Roku, Amazon Fire TV), and gaming consoles (PlayStation, Xbox) that deliver content via apps. The CTV advertising market grew from $2 billion in 2018 to over $20 billion in 2023, driven by cord-cutting trends where 40% of US households became CTV-only by 2022. Unlike traditional TV measured by gross rating points (GRPs), CTV enables digital-style ROAS calculation through precise attribution, tracking ad exposure to specific devices and linking it to conversions like website visits or purchases. Major players include demand-side platforms (DSPs) like The Trade Desk, supply-side platforms (SSPs) like Magnite, and measurement providers like Nielsen and Comscore.

How It Works

CTV ROAS calculation involves three core components: ad delivery, attribution, and revenue tracking. First, ads are served programmatically through real-time bidding (RTB) on ad exchanges, targeting specific audiences using first-party data (e.g., purchase history) or contextual signals (e.g., viewing genre). Attribution connects ad exposure to conversions via device identifiers like Roku Advertising ID or Amazon Fire TV ID, which are hashed for privacy. When a user sees a CTV ad and later completes an action on a linked device (phone, computer), cross-device graphs match the CTV device ID to the conversion device using probabilistic or deterministic matching. Revenue data from e-commerce platforms or app stores is then integrated to calculate ROAS as (Revenue from CTV-attributed conversions) / (CTV ad spend). Advanced setups use multi-touch attribution (MTA) to assign fractional credit across touchpoints or incrementality testing to measure lift against control groups.

Why It Matters

CTV ROAS matters because it provides advertisers with measurable efficiency in a rapidly shifting media landscape, where US CTV ad spending is projected to reach $30 billion by 2025. High ROAS (above 3:1) indicates effective targeting and creative, enabling brands to reallocate budgets from lower-performing channels like linear TV or display ads. For example, a DTC brand might achieve 4:1 ROAS on CTV by retargeting website visitors with tailored video ads, compared to 2:1 on social media. This efficiency drives competitive advantage, as companies like Peloton and Shopify have used CTV ROAS optimization to scale customer acquisition profitably. Additionally, ROAS transparency helps platforms demonstrate value to advertisers, fueling innovation in interactive ads (shoppable videos) and audience segmentation (sports fans, luxury shoppers).