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Google’s August 17 Bidding Change: Check Budget-Limited Performance Max

BySplinternet Marketing

Starting August 17, 2026, Google began updating how eligible budget-constrained target-based campaigns bid. The change affects campaigns marked Limited by budget when they use Target CPA or Target ROAS, including Performance Max.

Google says affected campaigns should optimize more consistently toward their stated targets. For Performance Max, that may change conversion volume, CPA, ROAS, total spend distribution, or the mix of channels receiving budget. See Google Ads Help’s target-based bidding update for the documented scope.

Campaigns that have historically performed better than their entered targets deserve special attention. Google says those campaigns may be affected if no action is taken. In practice, performance can move closer to the stated target, which may change volume even when the account still appears healthy.

Need help checking this on your WordPress, Google Ads, Analytics, local SEO, or website setup? Splinternet Marketing can review the issue and help you prioritize the next fix.

Who should audit first

Start with Performance Max campaigns that meet all three conditions:

  • The campaign is marked Limited by budget.
  • It uses Target CPA or Target ROAS.
  • It has enough recent activity for performance comparisons to be meaningful.

“Limited by budget” does not automatically mean the campaign is unsuccessful. Google defines the status as a budget that may be too low to capture all available impressions and clicks under the campaign’s current settings. A campaign can still produce profitable leads or sales while leaving additional demand unserved. See Fix ‘Limited by budget’ bid adjustments.

In the Campaigns table and Bid Strategy report, compare actual CPA with average target CPA, or actual ROAS with average target ROAS. Do not rely only on the manually entered target. Google describes average target metrics as traffic-weighted measures that can reflect target changes during the selected period, making them a closer comparison for what Smart Bidding was optimizing toward. See About Target CPA bidding and About Target ROAS bidding.

What to do next

  1. Document the baseline. Export recent spend, conversions, qualified leads, revenue, actual CPA or ROAS, average target, budget, conversion delay, and channel-level allocation before making changes.
  2. Audit the conversion goal. For Target CPA, verify that the Conversions column includes actions that represent meaningful business outcomes. A raw form fill, duplicate call, spam lead, or low-intent inquiry can make bidding appear efficient while weakening lead quality. Google says automated bid strategies use the conversion actions included in the Conversions column.
  3. Validate offline feedback. Confirm that qualified leads, accepted opportunities, appointments, sales, or closed revenue are importing correctly before attributing a CPA or ROAS change to bidding. For local businesses, platform-reported lead volume is not enough to judge business performance.
  4. Review Target ROAS inputs. Check that conversion values are populated, consistent, and tied to realistic profitability assumptions. Google cautions that a Target ROAS set too high can limit traffic and conversion volume.
  5. Use Google’s tools before guessing. Review the Bid Target Adjustment Tool and use the Bid Simulator where relevant. If the target no longer reflects acceptable acquisition economics, adjust it based on the business rather than simply trying to restore a previous dashboard number.
  6. Control the evaluation window. Exclude the most recent conversion-delay period from performance judgments. After a material target change, wait one to two conversion cycles before evaluating results. Google also cautions that forecasts may be less reliable during the August 17–31 transition period.

Avoid stacking unrelated changes during the review. Do not add new bid limits, apply data exclusions, change conversion goals, transition bidding strategies, and rebuild landing pages at the same time unless there is a separate operational reason. Multiple changes make it difficult to identify whether the bidding update, tracking, lead quality, auction conditions, or conversion lag caused the movement.

For fixed-budget local advertisers, the best decision may not be the lowest reported CPA or highest platform ROAS. Compare qualified lead volume, accepted opportunities, revenue, and capacity against the target your business can actually support.

Sources

Need help checking this on your WordPress, Google Ads, Analytics, local SEO, or website setup? Splinternet Marketing can review the issue and help you prioritize the next fix.

This article is for informational purposes only and reflects general marketing, technology, website, and small-business guidance. Platform features, policies, search behavior, pricing, and security conditions can change. Verify current requirements with the relevant platform, provider, or professional advisor before acting. Nothing in this article should be treated as legal, tax, financial, cybersecurity, or other professional advice.

Editorial note: Splinternet Marketing articles are researched from cited platform, documentation, regulatory, and industry sources. AI may assist with drafting and review; final content is checked for source support, practical usefulness, and platform/date accuracy before publication.

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