Google changed how target-based bidding behaves for campaigns marked Limited by budget on 17 August 2026. The update affects Target CPA, Target ROAS and, in Demand Gen, Target CPC.
If one of your campaigns has been beating its stated target while operating with a restricted budget, leaving it untouched may change the results you see. Google says affected campaigns will now optimise more consistently towards the target you entered, even when the budget changes.
That sounds subtle, but it can have a material effect. A campaign with a Target CPA of AED 200 that has recently achieved an actual CPA of AED 120 may begin delivering closer to AED 200 unless you review the target. For UAE advertisers with tight lead-generation or ecommerce margins, that gap matters.
This guide explains what changed, which campaigns are affected and how to audit an account before changing bids or budgets.
What changed on 17 August 2026?
Historically, some budget-constrained campaigns using a target-based bid strategy substantially outperformed their stated targets. That could make scaling unpredictable: raising the budget sometimes changed efficiency because the campaign moved into auctions it previously could not enter.
Google’s update is designed to make those campaigns perform more consistently towards the selected target, regardless of whether the budget is restrictive.
The change does not mean Google will alter your daily budget or bidding target automatically. Account owners still decide whether to keep the current target, align it with recent results, choose a custom target, change bidding strategy or increase the budget.
The update applies to:
- Target CPA campaigns
- Target ROAS campaigns
- Target CPC campaigns in Demand Gen
- Search, Shopping, Performance Max, Demand Gen and Travel campaigns
- Eligible campaigns managed through Google Ads, Search Ads 360 and some Demand Gen activity in Display & Video 360
Campaigns that are not limited by budget are not expected to change behaviour because of this update. Manual CPC and Target Impression Share are also outside its scope.
Why “Limited by budget” now deserves a closer look
“Limited by budget” is not automatically a problem. It simply means Google estimates that a campaign could capture more traffic with more budget. The important question is whether the campaign is profitable at the performance level your business actually needs.
Before this update, an advertiser might have left a loose Target CPA in place because the campaign consistently beat it. That stated target now matters more.
Consider a Dubai lead-generation campaign with:
- A Target CPA of AED 300
- An actual 30-day CPA of AED 185
- A profitable maximum CPA of AED 220
- A Limited by budget status
If the target remains AED 300, the bidding system has room to move towards a cost per acquisition that no longer meets the commercial goal. The right response is not necessarily to force the target down to AED 185 overnight. It is to verify lead quality, conversion lag and margin, then set a realistic target the business can support.
How to audit affected Google Ads campaigns
1. Find campaigns that meet both conditions
Filter for campaigns that are Limited by budget and use Target CPA, Target ROAS or Demand Gen Target CPC. Do not make account-wide changes to campaigns that are unaffected.
2. Compare the stated target with recent actual performance
Review at least the last 30 days and, where conversion volume is low or sales cycles are long, a longer comparison period. Record:
- The current bidding target
- Actual CPA or ROAS
- Conversion volume and value
- Daily budget and average daily spend
- Conversion lag
- Any major promotions, seasonality or tracking changes
An apparent efficiency gain is not useful if it came from duplicate conversions or low-quality leads. Validate measurement before changing Smart Bidding inputs. WMI’s conversion tracking service explains the checks to make first.
3. Define the commercial target
Your bid target should reflect the economics of the business, not just the best number Google Ads achieved recently.
For lead generation, work backwards from close rate, average gross profit and the proportion of leads that are qualified. For ecommerce, account for gross margin, returns, shipping, agency or platform fees and repeat purchase value before choosing a Target ROAS.
If you are unsure what an acceptable return looks like, use WMI’s ROAS benchmarks by industry as context, then replace broad benchmarks with your own margin data.
4. Choose one deliberate response
Google provides five broad options:
- Keep the existing target. Appropriate when it still represents the real business goal.
- Align the target with recent performance. Useful when recent results are stable, correctly measured and commercially sustainable.
- Set a custom target. Often the best choice when the profitable threshold sits between the current target and recent actual results.
- Change bidding strategy. Maximise Conversions or Maximise Conversion Value may preserve volume, but without a target the strategy is designed to spend the available budget and efficiency can move.
- Increase the budget. Sensible when the current target is profitable and the business can handle additional volume.
Avoid combining several major changes at once. If you change the target, budget, conversion actions and campaign structure together, it becomes difficult to identify what caused the result.
5. Check the conversion actions used for bidding
A technically accurate CPA can still be commercially misleading. A campaign optimising towards unqualified form submissions may look efficient while producing weak pipeline.
Confirm that primary conversion actions represent meaningful outcomes. Where possible, import qualified leads, opportunities or sales from the CRM so bidding can distinguish a valuable enquiry from a poor one. See WMI’s offline conversion tracking service for the implementation approach.
6. Review budget recommendations critically
Google may forecast additional conversions if the budget increases. Treat that forecast as a planning input, not a guarantee.
Check whether sales, stock, fulfilment and cash flow can support the extra volume. For a fuller allocation framework, read how to set a Google Ads budget.
7. Monitor for at least one to two conversion cycles
Google recommends allowing one to two conversion cycles after a budget increase before judging performance. A conversion cycle includes the time from click to conversion plus the time required for that conversion to be reported.
Use annotations and a change log. Compare actual CPA or ROAS, volume, lead quality and profit:not just spend.
Common mistakes to avoid
Tightening targets too aggressively
Reducing a Target CPA or increasing a Target ROAS far beyond recent achievable performance can restrict traffic and conversion volume. Make a commercially justified adjustment and monitor it.
Treating platform ROAS as profit
Google Ads reports attributed revenue, not the profit left after product costs, returns, discounts, delivery and operating expenses. A higher ROAS is not always a better business outcome if it constrains profitable growth.
Scaling before fixing tracking
More budget amplifies both good and bad signals. Resolve duplicate tags, missing enhanced conversions and weak offline feedback before increasing spend.
Applying the same target to every campaign
Brand, non-brand, remarketing, lead generation and ecommerce campaigns have different economics. Targets should reflect their roles and conversion quality.
Reacting to a few days of data
Short windows are vulnerable to conversion lag, weekday patterns and random variation. Use a representative period and wait through the relevant conversion cycle after changes.
What UAE advertisers should do now
Review every Limited by budget campaign using a target-based strategy. Flag any campaign where the stated target is materially looser than recent performance or the maximum CPA/ROAS the business can tolerate.
Then make one controlled decision: keep the target, revise it, or fund more profitable volume. Document the reason and monitor business-quality outcomes after the change.
For a broader review, WMI’s Google Ads audit checklist covers tracking, campaign structure, search terms, bidding, budgets and landing pages.
Frequently asked questions
Will Google automatically change my Target CPA or Target ROAS?
No. Google states that it will not automatically change campaign budgets or bid targets as part of this update.
Are campaigns without a Limited by budget status affected?
Google says the changed behaviour applies to target-based bid strategy campaigns that are limited by budget. Campaigns that are not budget-constrained are not expected to change because of this update.
Should I lower my Target CPA to match recent performance?
Only if recent performance is stable, accurately tracked and aligned with lead quality and profitability. A custom target between the current setting and recent actual CPA may be more appropriate.
Should I increase my Google Ads budget?
Increase it when the target is profitable, tracking is reliable and the business can support more demand. Scale gradually and evaluate after one to two conversion cycles.
Does the update affect Performance Max?
Yes, when a Performance Max campaign is limited by budget and uses an affected target-based bidding strategy.
Get an independent Google Ads review
If your campaigns are limited by budget or your stated targets no longer match actual profitability, WMI can review the bidding, measurement and budget allocation before you scale.
Request a free Google Ads audit or explore WMI’s PPC management services in Dubai.
Editorial sources
- Changes to target-based bid strategies : Google Ads Help
- Frequently asked questions about target-based bid strategy changes : Google Ads Help
