What are National-local spots and why should you test them?

March 1, 2019

This blog post was updated in October 2020.

The television media-buying landscape is structured in a myriad of ways, so much so that advertisers can buy the same spot (or slices of that spot) from different angles, and at different pricing. In a previous post, we provided a  broad overview of TV buy opportunities and in this post, we’re doing a deep-dive on a complex, yet popular, inventory slice oddly called “national-locals”.  

Defining National and Local Spots

First, let’s set the context by explaining national vs local TV inventory, and how they get sold.  A national airing is exactly what it says (i.e. the entire country watching the network will see the ad) and it is typically sold by the cable network or broadcaster directly.  In contrast, a local airing is a spot sold by a network affiliate or a multichannel video programming distributor (MVPD) such as Comcast.  These local spots air on the same network as the national spots, but they air during what is called a “local break” which is a pod of commercials that the network allows to be sold in local markets.  When the local market sells one of these spots, they actually cover up the original ad that was placed there by the national market with the ad that they sold.

An example of a national spot is an airing on Good Morning America, sold by ABC that airs everywhere in the same reel position.  Local inventory is a spot during the same show, but only aired within certain geography and during ABC’s local break. ABC7-KGO, an owned & operated ABC affiliate in the San Francisco Bay Area, may sell a spot on Good Morning America to a local car dealer.  For broadcast television, it’s the local affiliate who will sell the inventory but for cable television, it’s the MVPD such as the cable provider that sells local inventory (e.g. Comcast Spotlight, Spectrum, Dish, and DirecTV sell local spots on the Discovery Network).  While a local spot is less expensive, it also delivers fewer impressions. Measured on a CPM basis, however,  local TV airings are typically more expensive than their national equivalent (which, one can argue, makes sense given the geo-targeting).    


A national-local is a spot that is purchased to air across the country during the local break timeslots, however, they might not be shown everywhere because local stations sold the timeslot to someone else and ran that commercial on top of the national spot.

Unlike a true national buy, the national-local airing is “covered up” by the local airings in the markets where MVPDs did sell the local spot.  The exact coverage (and therefore, impressions) that the buyer of the national-local will get is unknown (although networks often do provide estimates); in return, a national-local airing has a lower price than its national counterpart (e.g. 30-70% discount when measured on CPM basis).

In streaming, no inventory is specifically labeled (or sold) as national-local inventory.  However, the concept of a cover-up most definitely exists. For example, FuboTV will sell part of its inventory to various distributors (and at a premium); the remaining inventory is then sold as “run-of-site” or “run of network”. This is most similar to a national-local.

Why you should test National-local spots

The most obvious rationale for purchasing national-local inventory is the cost to benefit ratio.  Since the drop in price is generally greater than the drop in impressions, the above CPM discount can offer great value in terms of impressions delivered (i.e. and still offering national reach and scale).  Advertisers may also choose to buy both nationals and national-local airings at the same time to boost capacity on a particular network (e.g. driving four or five airings within the same hour).  In addition, national-locals can give TV advertisers access to airings which are otherwise too expensive to buy at a national level (e.g. airings during a sports game or major TV show). But perhaps the greatest reason to use national-locals is the ability they provide to test expensive networks on a smaller scale before taking the plunge on a large primetime Tier 1 plan, for example.  Advertisers can dip their toes in the water before jumping in. 

While national-locals may not help you reach all of your advertising goals, they can be an important part of any balanced media plan.

Brad Geving

I'm Head of Media Buying & Ops and I love it when a plan comes together.


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