POV: Navigating Google's Latest Bidding Update and the End of "Gaming" Efficiency

If you’ve been managing Google Ads campaigns, you may have noticed being able to deliver a higher ROAS or a lower CPA than your campaign bid strategies are actually set to by throttling campaign budgets. Essentially, Google’s algorithm would select the “best of the best” auctions to enter when campaigns were limited by budget, which made it possible to achieve significantly better efficiency compared to bid strategy targets (force low spend, high returns).

Starting August 17th, 2026, Google will now be closing this loophole. Here is a breakdown of what’s changing, who will feel the impact, and how the digital advertising landscape is about to shift.

What’s Happening?

Google is rolling out changes to how its target-based bid strategies - specifically Target CPA (Cost Per Acquisition) and Target ROAS (Return on Ad Spend) - operate when constrained by budget.

In the past, campaigns running on these strategies were likely to heavily overperform when their daily budgets were limited. Google’s system would cherry-pick only the most guaranteed, high-converting auctions. This generally meant dealing with increased volatility (some days would be very efficient with other days driving little to no conversions at all), but overall ROAS would exceed targets. Moving forward, this will no longer be the case. The algorithm will adjust delivery and performance to actually achieve your specified targets, regardless of any budget constraints. This should effectively throttle large volatility swings to be more predictable and more closely aligned with targets.

The Core Impact: You Can No Longer "Game" the Target

For a long time, savvy advertisers could exploit this quirk in the system. For instance, you could set a baseline target of 300% ROAS, but then aggressively cap your daily budget. By doing this, you forced Google's algorithm into a corner where it would only bid on the absolute "best of the best" auctions to preserve the limited budget. You may have a couple days that drive a 500% ROAS, followed by a few days with a 100% (or lower ROAS), but with limited spend, the average ROAS over weeks (or even months) would continue to exceed targets.

Starting August 17th, that tactic will no longer be viable. Google will stop concentrating your ad delivery to those top-tier auctions simply because your budget is low. If your target is 300%, the system will aim to deliver exactly that. We expect this to reduce the intensity of these volatility swings, which would narrow the highs and lows of actual performance when compared to your specified targets.

Who Does This Affect?

This shift will be felt across the board, but a few specific groups will be impacted the most:

• Smaller Advertisers: Brands working with stricter, smaller budgets who have historically relied on this loophole to squeeze out maximum efficiency.

• Larger Advertisers with Segmented Budgets: Enterprise accounts that have specific sub-segments or niche campaigns that are currently being throttled by strict budget caps.

How Will This Affect the Landscape?

We believe this fundamental shift in auction dynamics will drastically alter the playing field. By preventing budget-limited campaigns from monopolizing the absolute highest-converting clicks, Google is effectively freeing up those "best of the best" auctions.

These high-quality auctions will now flow to other advertisers. Consequently, we expect to see performance improvements for larger, non-budget-constrained campaigns. In essence, this update will likely decrease efficiency for smaller advertisers with less budget flexibility, while shifting that same efficiency over to bigger players who can fully fund their target-based strategies.

Next Steps

If your campaigns have been overachieving compared to their bid strategies and are constrained by limited budgets, you will see performance dip. Google will no longer prioritize entering the most efficient auctions within budget-limited setups.

Adapting to this change means re-evaluating your target settings, budget distributions, and overall bid strategies to ensure they align with Google's new algorithmic reality.

If you are concerned about how this update will impact your account's efficiency, we can help. Contact us today to discuss how we can recalibrate your strategy to achieve - and continue to surpass - your marketing objectives in today’s ecosystem.