Ron Sneddon
25 Feb 2026 · 5 min read
Display CPMs in NZ are significantly above what programmatic buying should deliver. Here's why — and what the gap looks like in practice.
Digital display is the most opaque part of most NZ media budgets — and opacity tends to cost money.
In a well-run programmatic setup, a brand paying $15–25 CPM for premium NZ display inventory is getting reasonable value. In a poorly-run setup — which describes more accounts than most agencies would admit — that same inventory costs $40–60 CPM, with margin extracted at multiple points along the way.
Where the margin lives
There are typically three or four layers between a brand's media budget and the publisher who serves the ad. Each layer takes a cut. In a transparent buying model, those cuts are disclosed. In a less transparent model, they're not.
The industry term for this is "tech tax" — the accumulated cost of DSPs, SSPs, data layers, verification tools, and agency trading desks, all extracting margin before the ad is served.
A well-structured programmatic buy minimises this. A poorly-structured one amplifies it.
What the audit typically finds
In media audits I've run for NZ clients, the most common finding in digital display is a combination of:
- CPMs 30–60% above market rate for equivalent inventory - Reach curves that plateau far earlier than assumed - Frequency management that's absent or nominal - Third-party verification that confirms impressions were served, not that they were seen
Impressions served and impressions seen are not the same number. Most plans are measured on the former.
What to do about it
Ask your agency for a complete fee disclosure on your programmatic spend. Ask them to separate the media cost from the tech and service fees. Ask what they're paying for inventory at the DSP level versus what you're being charged.
If they can't answer those questions specifically, the display line in your media plan deserves more scrutiny.
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