Google Ads Bidding Update: What Changes on August 17, 2026

If your Target CPA or Target ROAS campaigns have been quietly outperforming their own targets, enjoy it while it lasts. On August 17, 2026, Google is changing how budget-limited campaigns behave — and the free lunch of "better than target" performance is going away.

What's Actually Changing

The update applies to Search, Shopping, Performance Max and Demand Gen campaigns running a target-based bid strategy — Target CPA or Target ROAS — while limited by budget. Today, a budget-limited campaign often quietly beats its own target, so raising the budget produces performance nobody can reliably forecast. After August 17, these campaigns will track much closer to the target you actually set, budget increases included.

Who's Affected

Affected: Search, Shopping, Performance Max and Demand Gen campaigns on Target CPA or Target ROAS that are currently budget-limited.

Not affected: App campaigns, Video reach and Video view campaigns. Hotel and Display campaigns already behave this way, so nothing changes for them.

What To Do Before August 17

1. Open the new Bid Target Adjustment Tool (live since July 6) and review the suggested target for every budget-limited campaign.
2. Check historical performance versus target — if a campaign has been beating its target, expect volume or efficiency to shift once enforcement kicks in.
3. Loosen targets on your highest-priority budget-limited campaigns now, rather than reacting to a performance dip after the rollout.

Why This Matters for Forecasting

The core problem this fixes is a trust issue between advertisers and the platform. When a budget-limited campaign consistently beats its target, that target stops meaning anything — you can't use it to model what happens if you double spend next quarter. Enforcing the target, even when it means giving up some "free" overperformance, is what makes the number usable for planning in the first place. It's a trade: slightly less upside on paper, in exchange for numbers you can actually build a media plan around.

None of this is a reason to panic — it's Google closing the gap between what you set and what you actually get. Accounts that review their targets before August 17 will barely notice the switch. Accounts that don't will spend September wondering why a campaign that "always overperformed" suddenly stopped, and second-guessing a bid strategy that didn't actually change — only the enforcement behind it did.