A fair quote comparison needs more than the lowest price. First establish what each offer delivers, then decide whether its audience and format fit the objective. Cost per thousand impressions can be useful when the impression estimates are credible and comparable. It is much less useful when one seller reports venue visitors and another reports advertisement-specific exposure. Keep the assumptions beside the calculation.
Standardise the proposal
Put each offer into the same comparison sheet: location, dates, currency, operating hours, creative duration, planned delivery and total cost. Add production and other agreed items. Record exclusions and what happens if delivery is missed. This basic structure often explains a price difference before any more complex calculation is needed.
Calculate CPM only on a suitable basis
The arithmetic is total relevant media cost divided by estimated impressions, multiplied by one thousand. For a hypothetical cost of 200 and 50,000 comparable impressions, CPM is 4 in the same currency. The result is only as useful as the estimate and the cost basis. It is not a guarantee that people noticed the advertisement.
Compare relevance as well as volume
A smaller relevant audience can be more useful than broad exposure far from the business’s customers. Consider the offer, customer journey and ability to respond. Do not let a low calculated CPM hide poor fit, a difficult sightline or a schedule that misses the useful hours. Explain these practical factors in the decision.
Keep a reason for the final choice
Document why you selected a screen or group and what outcome you expect. Save the original quotations and definitions. After the campaign, compare delivered evidence and qualified response with those expectations. This turns procurement into a repeatable learning process rather than a fresh guess every time the budget is allocated.
Your practical checklist
- Compare the same dates, units and total costs.
- Check the audience methodology before using CPM.
- Score relevance and viewing conditions.
- Record the decision and review it after delivery.
Frequently asked questions
Is the lowest CPM always best?
No. Audience quality, measurement reliability, visibility and the customer journey also matter. A cheap estimate is not automatically valuable exposure.
Can I add impression figures across every location?
You can report a clearly labelled total where definitions permit it, but that does not automatically produce unique reach. People may encounter several screens.
Put the plan into practice
Explore currently listed advertising screens, prepare an authorised screen listing, or organise your company workspace. Confirm the actual inventory, delivery and supported connections before committing to a campaign.
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Further information: official industry or technical source. This guide offers practical planning guidance; specific availability, rules and services need confirmation for the campaign.