How to measure TV and BVOD advertising effectiveness
What is TV advertising ROI?
Measuring the ROI (return on investment) from TV advertising boils down to one simple formula. Profit volume ÷ Media spend. You could also include production costs for making the ad, but hopefully that advert is working hard for you in other media channels. So, to keep it simple, we’ll stick with profit divided by media spend. The goal is to get as far from £1 as possible.
What ROI does TV advertising deliver in the UK?
Numbers from industry body Thinkbox show that TV advertising works. The report studied 141 brands and £1.8bn of spend between 2021–23.
Linear TV plus BVOD: £5.61 full profit ROI, and 54.7% of all advertising-generated profit.
Linear TV alone: £5.94 ROI, and 46.6% of advertising-generated profit.
Linear TV stops paying back more within the same week at about £330k of weekly spend.
Why does TV ROI take longer to show than digital ROI?
The Thinkbox study breaks payback periods into four distinct categories:
Immediate: within 1 week of the TV advert running.
Short-term: up to 13 weeks from broadcast date.
Sustained: week 14 to 24 months.
Full: 0 to 24 months.Across all media, 58% of advertising profit arrives after week 13. Expecting a TV campaign to deliver the same short-term spike as a small digital campaign is misguided. TV not only sustains longer but also delivers better results.
Which metrics should you track to measure TV advertising?
To track advertising effectiveness, you’ll need three metrics: media, which tells you whether the right people saw your advert. Response metrics tell you whether the viewer took action because of your advert. Finally, business metrics tell you whether you made money from the whole enterprise.
Media metrics: did the right people see your ad?
Media metrics measure delivery, meaning how many of your target audience saw your ad and how often. In the UK, BARB, the official TV audience measurement body, provides this data, and broadcasters use it to price and report every campaign.
Impacts: one impact is one person watching one advert. Airtime is bought and sold in impacts, so this is the basic unit of every TV plan.
TVRs and GRPs: a TVR (television rating) is the percentage of your target audience that watched a spot. Add up the TVRs across a campaign to get GRPs (gross rating points), which show the campaign’s total weight.
Cost per thousand (CPT): what you pay for 1,000 impacts among your target audience. UK airtime is traded on CPT; ITV1’s average CPT for all adults was £14.32 from January to August 2026, according to TV Media Buying.
Reach and frequency: reach is the percentage of your audience who saw the ad at least once. Frequency is the average number of times they saw it. Together, they show whether you reached enough people, often enough, for them to remember you.
Response metrics: did viewers act?
Response metrics measure what viewers did after seeing your advert. Most of this response happens online, often within minutes of the commercial airing. Across 10 online brands studied by Thinkbox, TV drove 42% of all website visits.
Web visits: the rise in site traffic in the minutes after each ad airs, compared with your normal traffic level. ITV’s benchmark data shows first-time TV advertisers gain an average of +58% in web traffic (ITV Media).
Brand search: the rise in people searching for your brand name on Google and other search engines. One of the clearest signs that TV is working, because people rarely search for a brand they haven’t heard of.
App installs: the rise in downloads after each ad airs, for app-based businesses, tracked by matching install times to airtime.
Business metrics: did TV make you money?
Business metrics measure the commercial outcome, and they are the numbers your finance director will ask about. ITV argues that reach and attention are useful media metrics, but only a stop-off on the way to incremental sales, profit and customer acquisition cost (ITV Media).
Incremental sales: sales that would not have happened without the TV campaign, measured against a baseline or a control region.
Customer acquisition cost (CAC): total marketing cost divided by new customers won. TV often raises spend at first but lowers your CAC across all channels over time, as more people know your brand.
How do you measure the immediate response to a TV ad?
As the response metrics above show, most responses to TV adverts happen online. This gives advertisers a great way to gauge a campaign’s effectiveness. Platforms like Adalyser take a baseline traffic sample from a website before an advert runs. Adalyser then enables spot-level analysis by matching website traffic and brand search spikes in the minutes after an advert runs. This is not only a great way to see whether a campaign is working, but it also enables updated media campaign buying based on real-world data.
How do you measure TV’s effect on search and other channels?
TV advertising makes your search marketing work harder: viewers search for your brand after seeing your ad, and ITV Media’s Auction Boost research found that TV improves search impressions and click-through rates and drives 7% of search conversions (ITV Media).Watching how your brand performs in brand searches against others in your category can show brand growth.
How do you set up a TV ROI measurement plan?
Write a list of objectives and rank them by importance. Set key KPIs for the TV advertising campaign, and track them. Then set up website tagging and any baseline search metrics you need. Run the campaign and measure short-term results. Don’t forget to keep the results programme going to capture longer-term outcomes. Don’t forget these practical steps: Can your website or app handle traffic spikes? If you have one, is your call centre ready? And do you have enough stock to keep up with orders?
