Global ad spend to surpass $1T in 2026; India set to cross $15B: dentsu report

Global advertising is on the brink of a defining threshold. The latest dentsu Global Ad Spend Forecasts (December 2025) claims worldwide advertising expenditure is expected to rise $50 billion and will exceed $1 trillion for the first time in 2026, supported by major media events such as Olympics, FIFA and the US mid-term elections. 

The trillion-dollar milestone, dentsu notes, is being fuelled by new engines of growth—digital acceleration, retail media expansion, monetisation of live sports assets, and the increasing adoption of AI-powered marketing platforms that enable precision planning, predictive modelling and outcome-led optimisation. 

Global Ad growth (5.1%) is expected to outpace global GDP (3.1%) in 2026, signalling a market where marketing is not merely responding to consumer demand but actively shaping it. But the real story is how growth is being redefined in the Algorithmic Era, where algorithms now shape what people see, choose and buy. 

“Over 76 percent of ad spend will be driven by algorithms by 2026 as AI increasingly permeates media and marketing systems,” claims the report. 

Read On: Dentsu at the Crossroads: Can Japan’s ad giant rebuild its global reputation?

According to the report, India sits at the heart of this transformation. The advertising expenditure in the country is projected to rise from $14 billion in 2025 to $15.2 billion (Rs 1.25 lakh crore) in 2026, before accelerating further to $18.4 billion by 2028, reveals the report. The pace of expansion is even more significant than the totals themselves. Year-on-year growth is expected to rise from 7.8% in 2025 to 10.3% by 2028, reflecting the deepening maturity of India’s digital-first ecosystem. 

The report comes at a critical juncture for the global advertising industry. While Omnicom and IPG have merged to collectively navigate market volatility and economic pressures, Dentsu is reportedly exploring the sale of some of its international assets, including India, as part of a broader cost-saving strategy. At the same time, the findings offer reassurance to the industry, signaling that 2026 is expected to remain on a steady growth trajectory.

Dentsu Global Practice President-Media and Integrated Solutions Will stated: “In the Algorithmic Era the brands that win will be the ones that understand how discovery and decision making are shaped by algorithms and use media as a strategic engine to earn attention and build long term advantage. 2026 rewards the marketers who innovate with intent, design for outcomes and meet people in the moments that matter.”

The report offers more than economic projections—it provides a blueprint for where influence, innovation and value will migrate. An industry expert noted, “Advertising has crossed a psychological boundary where spend is no longer tethered to incremental GDP movement but driven by platforms, algorithms and commerce ecosystems that rewire customer journeys. In that worldview, the trillion-dollar headline is not the conclusion—it is the overture. And in this overture, India is not following global trends; it is defining them.”

Read On: Inside dentsu’s global challenges: Acquisition spree and integration hurdles

Factors Fuelling India Growth 

The report attributes India momentum to expanding retail media networks, heightened digital penetration in non-metro markets, the rapid growth of vernacular content consumption, and a decisive shift toward attention-led advertising models. India, dentsu observes, is no longer a peripheral node in global brand rollouts—it is an independent, high-growth theatre where many global marketing decisions now originate.

This momentum is altering the regional balance of power. While North America remains the world’s largest advertising market by spend, the Asia-Pacific (APAC) region has now become the fastest-growing bloc. The dentsu report points out that APAC’s surge is powered by rising mobile usage, the proliferation of creator-led commerce ecosystems, and a leap in retail media adoption. 

The region is steadily pulling global budgets away from legacy channels and into measurable, data-enriched digital environments. India’s performance places it at the vanguard of this shift, outpacing peers such as Indonesia, South Korea and Australia, and positioning itself as the most consequential market in APAC over the next three years.

Read On: Dentsu aims to rebuild international business on its own: Hiroshi Igarashi on stake sale

Industry Being Rewired

The report notes that categories that fail to embrace digital transformation and commerce-linked models risk stagnation, while those aligned with wellness, functionality and mobile-first consumption are poised for disproportionate share gains. The implication is clear: advertising is moving away from campaigns that chase visibility and toward experiences that compel action.

The report underscores that this is not a marketplace recovering from a shock but an industry being rewired. The shift from traditional reach-based buying to attention-based valuation—where consumer engagement and behaviour are monetised in real time—signals a new definition of advertising effectiveness. 

Markets that can capitalize on this shift, dentsu argues, will lead the next era of global marketing. India already demonstrates many of these characteristics: a massive mobile-first audience, a thriving creator economy, and an emerging measurement stack that prioritises business outcomes over impressions. As global networks consolidate capabilities, India’s role will only deepen.