South Korea's overall advertising market grew 44.2% from KRW 11.7906 trillion in 2015 to KRW 17.2087 trillion in 2024, but broadcast advertising revenue over the same period fell 27.6% from KRW 4.464 trillion to KRW 3.2334 trillion, with terrestrial broadcast advertising alone plunging roughly 56% from about KRW 1.9 trillion to about KRW 800 billion.
Online advertising, by contrast, roughly tripled from KRW 3.4278 trillion to KRW 10.1358 trillion over the same span, shifting the center of gravity toward digital.
Against this backdrop, the broadcasting regulator adopted an enforcement decree on August 12, 2026 that raises the daily advertising quota from 17% to 20% of a channel's daily broadcast time and shortens the minimum program length eligible for mid-program ads from 45 to 30 minutes, with implementation set for October.
The regulator estimated the change would generate roughly KRW 50 billion in additional industry revenue, but the broadcasting association, whose members include the terrestrial broadcasters, expressed disappointment that the reform fell short of a full daily-quota system or complete freedom in mid-ad placement.
In the OTT competitive landscape, amid ongoing merger discussions between Tving and Wavve led by SK Square and CJ ENM, SBS's exit from Wavve in favor of a Netflix partnership has weakened Wavve's terrestrial-content exclusivity.
MBC content has also begun migrating toward Tving, signaling that the terrestrial broadcasters' joint OTT structure itself is being reshaped.
Ultimately, terrestrial broadcasters face a common challenge of diversifying revenue through IP distribution, overseas partnerships and AI adoption amid the structural erosion of the traditional advertising model.