Smart Bidding Now Bids to Target: What B2B Advertisers Should Do

If your Google Ads campaigns are limited by budget and use Target CPA or Target ROAS, the target you typed in now matters more than it used to. From August 17, 2026, Smart Bidding aims for that target instead of routinely beating it. For many B2B accounts, that means the target was set wrong and needs revisiting before the numbers drift.

What changed

Google announced in June that Smart Bidding would start optimising budget-limited Target CPA and Target ROAS campaigns closer to the targets advertisers set, rather than continuing to outperform them. Previously, a campaign that could not spend its full daily budget often delivered a lower cost per acquisition than its target, because the system was bidding conservatively inside a tight budget.

After advertisers pushed back, Google Ads Liaison Ginny Marvin clarified the change in LinkedIn comments, as reported by Search Engine Journal. The main points:

• Budgets are not increased automatically, and daily and monthly budget limits are still respected.
• The update does not change campaign settings on its own.
• The change is not meant to raise spend on a campaign that is already budget constrained.
• Google frames the goal as predictability: campaigns should behave the same way at the target whether they are budget-limited or not, which makes budget changes easier to forecast.

PPC Land also reported Google denying that the change was broader than budget-limited campaigns with targets.

Related: Unlocking Success: The Best Demand Generation Campaigns for B2B Growth (2026)

Why advertisers were uneasy

The worry was simple. If a campaign used to deliver leads at below target cost and now aims for the target itself, cost per lead can rise even though the budget has not changed. Spend stays flat, but you get fewer conversions for it. For advertisers who set a loose target as a ceiling and relied on the system to do better, that is a real change in outcome.

Google's position is that bidding to the target is how Smart Bidding already works when budget is not a constraint. That is true, but it moves the responsibility for getting the target right squarely back to the advertiser.

According to PPC Land, the change covers Search, Shopping, Performance Max, Demand Gen and Travel campaigns that show a "Limited by budget" status and use Target CPA or Target ROAS. App and video reach or view campaigns are excluded. In practice, any budget-limited campaign carrying a CPA or ROAS target should be on your review list.

Why this bites B2B accounts in particular

B2B search campaigns tend to have three traits that make this change more noticeable:

1. Small, fixed budgets. Many B2B campaigns sit permanently in "limited by budget" because the addressable audience is expensive and budgets are set quarterly.
2. Loose targets. Targets are often set once from a rough estimate and left alone, sometimes deliberately high to avoid throttling volume.
3. Weak conversion signals. A form fill is not a customer. If Smart Bidding is optimising towards cheap form fills, bidding closer to target can mean more low-quality leads at a higher price.

Related: Supercharge Your Marketing Campaigns with Custom Email Development

What to do before the numbers move

Work through each budget-limited campaign that uses Target CPA or Target ROAS:

1. Compare actual CPA or ROAS against target over the last 60 to 90 days. The bigger the gap, the bigger the likely shift.
2. Reset the target to what you actually want to pay, not a comfortable ceiling. If you were happy with the results you were getting, set the target near those results.
3. Decide whether the campaign should be budget-limited at all. If it is profitable at target, a larger budget may be the better lever.
4. Annotate the change date in your reporting so any shift after August 17 is not misread as a market or creative problem.
5. Watch the first two to three weeks closely and adjust in small steps rather than big swings, which reset learning.

Fix the signal, not just the bid

The deeper issue for B2B advertisers is what Smart Bidding is being asked to optimise. If the conversion is "submitted a form", the system will find more people who submit forms, whether or not they are buyers.

Better options include importing offline conversions from your CRM, such as qualified leads or opportunities, or assigning conversion values that reflect lead quality. It also helps to know what happens to the paid clicks that never convert. Most B2B visitors leave without filling anything in. Website visitor identification shows which companies and people those paid visits came from, so you can judge whether the traffic is reaching your target accounts even before it converts, and follow up with the ones that fit.

What not to do

• Do not raise budgets reflexively on August 17 because Google's messaging mentions predictability.
• Do not switch every campaign to Maximise Conversions without a target to escape the change; you lose control instead of gaining it.
• Do not judge the change on a few days of data. Smart Bidding needs time to settle, and B2B conversion volumes are small.
• Do not forget campaigns in Performance Max and Demand Gen that use targets; the change is not limited to Search.

The takeaway

Google's clarification removes the fear of automatic overspend, but it does not remove the practical effect: budget-limited campaigns with loose targets will spend to those targets. Treat this as a prompt to audit every target, set it to the number you actually want, and feed the system better conversion signals. B2B advertisers who do that will likely see little disruption. Those who do not may see costs creep up without any setting having changed.