Why CPC inflation starts before the auction

Rising CPCs aren’t just the result of more competition inside search auctions. They’re increasingly the result of what happens before anyone places a bid.

AI Overviews, shrinking organic click volume, and stronger brands competing for a smaller pool of commercial traffic have changed the economics of paid search. Improving bids and ad copy still matter, but the biggest opportunities now sit outside the auction itself.

Why paid search keeps getting more expensive

Paid search costs are climbing across almost every category. The cross-industry average CPC is $5.42, per the latest WordStream benchmarks, more than double what it was a decade ago. 

Stackmatix has Google Search up 14-18% year over year. LinkedIn is up 18 to 22%. Some accounts are seeing 25% inflation in their primary commercial keywords.

For most of the last decade, organic search helped offset PPC costs. Today, AI Overviews absorb the clicks that used to keep your paid search efficient. 

The latest zero-click study from Sparktoro shows an 8% reduction in clicks through from search engines vs. 2025, further impacting brands whose users now get information from AI summaries. 

Digiday’s research with brand and agency professionals shows 37% of respondents have already seen informational search traffic decline, which mirrors what we’re seeing across our client base, putting more pressure on navigational and transactional traffic to hold steady.

The number of advertisers participating in search auctions has risen 35% year over year because AI creative tools have lowered the barrier to entry for new bidders. In its first year, AI Max for Search has expanded query space for advertisers willing to use it, but also concentrated competition into a narrower set of commercial queries.

Fewer organic clicks reaching your site means more pressure to make up the gap in paid auctions. More advertisers fighting for those auctions means higher CPCs. And the auctions that still resolve to a click are increasingly the only ones where a user has exited the AI summary and chosen to scroll past it.

Dig deeper: The authority era: How AI is reshaping what ranks in search

3 levers that matter more than the auction

Paid search performance in 2026 is decided across three layers. The auction itself now offers the least opportunity to improve results.

1. Brand: Upstream of the click

This layer determines whether a click is generated or absorbed before any auction begins. It’s influenced by authority signals, brand mentions, AI Overview inclusion, LLM citations, and visibility in the publications and communities AI systems use to build their answers.

Most CPC inflation starts here. When AI Overviews answer more queries directly, the pool of clicks available to advertisers shrinks. The auction doesn’t get cheaper as a result. It gets more expensive because the same number of advertisers compete for fewer clicks.

As CPCs continue to rise, the brands protecting their margins are building visibility across multiple platforms. A stronger organic presence lets them rely less on paid search while remaining visible throughout the buying journey.

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2. Reach: At the click

The auction itself is influenced by ID strategy, match types, ad copy, automation, Smart Bidding configurations, and Performance Max guardrails.

This is where most paid teams still focus their efforts. It’s also the layer with the least leverage left because the size and quality of the click pool are determined upstream. The work still matters, but the opportunity to improve performance here is smaller than it used to be.

Red ocean vs. blue ocean media

The paid channels where most performance teams compete are becoming red oceans: saturated auctions where advertisers bid against one another for the same shrinking pool of commercial clicks.

Blue oceans are channels where buyer intent already exists, but advertiser competition hasn’t yet caught up.

Red ocean (where competition is fiercest)	Blue ocean (where intent exists but competition is lower)	Why the shift works
Google Search non-brand commercial keywords	Microsoft Advertising (Bing), including its growing share of AI Search ad surfaces	CPCs typically 20 to 40% lower, audience skews older and higher value, much less crowded
Standard LinkedIn Sponsored Content	LinkedIn Thought Leader Ads (peer-to-peer format from a real profile)	Around 1.7x higher CTR than company-page ads, lower effective CPC, better fit for considered purchases
Meta feed ads (broad demographic targeting)	Reddit Ads, community sponsorships, niche newsletter and Substack advertising	High-intent attention in environments LLMs cite, less saturated auction dynamics, more first-party engagement
Performance Max and Google display	Connected TV, BVOD, podcast advertising	Premium attention at the top of the funnel, fewer competing bidders, channel measurement is maturing fast
Branded search defense at any cost	AI Search and early ChatGPT ad inventory	First-movers are buying tomorrow’s primary discovery surface at today’s clearance prices

This isn’t an argument for abandoning Google Search. It’s a reminder not to overinvest your paid budget in the most competitive auctions. Instead, start shifting some of your existing budget into testing emerging channels and compare their performance with traditional search.

3. Experience: After the click

The post-click experience is an essential part of media economics, but most paid teams still treat it as something to hand off to another function.

Every other lever in this article governs what you pay to enter the auction. Experience determines what each click is worth after you’ve paid for it, and it’s the only one of the three layers you fully control.

In an inflating market, post-click conversion stops being a quarterly optimization exercise and becomes your primary defense against rising acquisition costs.

Google’s Ad Rank is calculated using your bid, your Quality Score, and the expected impact of assets. Landing page experience is one of the three components of Quality Score.

A higher Quality Score directly offsets the need to bid more aggressively. A stronger landing page can help you outrank a better-funded competitor while paying less per click.

That said, most expensive clicks don’t convert on the first visit, especially in B2B, where buying cycles are longer and purchases are more considered. The job of the experience layer is to convert and capture. Think first-party data, a reason to return, and an entry point into nurture and CRM.

The advertisers protecting their margins through this transition will stop treating media and landing pages as separate disciplines. They’ll manage them as a single P&L shared across paid media, CRO, UX, content, and lead nurture.

Dig deeper: The new SEO imperative: Building your brand

What winning paid search looks like now

Paid search accounts for a smaller share of where performance is earned, and it’s becoming a more expensive channel to operate if you haven’t built brand strength around it. Much of the work that makes paid search efficient now sits in disciplines paid search teams have historically considered someone else’s job.

The teams that protect their margins through this transition won’t be the ones with better targeting or bidding strategies. They’ll be the ones who’ve built enough visibility and authority outside the auction to win it when it matters.