Starting August 17, 2026, Google Ads is changing how its target-based bid strategies behave (Target CPA, Target ROAS and, for Demand Gen, Target CPC) when campaigns are limited by budget. In practice: a campaign that used to « outperform » its target will see its performance move toward the configured target rather than its historical level. Google will not adjust your targets or budgets automatically: it’s up to you to act before the rollout.
If you’re currently seeing the alerts « Check your campaign targets » or « Review your portfolio targets » in your accounts, this is exactly what they’re about. At Keyweo, we went through Google’s official announcement, its dedicated FAQ and the first market reactions to give you a complete action plan.
The alert shown since early July in affected accounts: it is triggered for advertisers that had budget-limited campaigns within the last 12 months.
The essentials in 30 seconds
- What: budget-limited campaigns on tCPA / tROAS will optimize toward the defined target, even after a budget change.
- When: rollout starting August 17, 2026. The bid target adjustment tool (Bid Target Adjustment Tool) has been available since July 6, 2026.
- Who: Search, Shopping, Performance Max, Demand Gen, Travel (already live on Display and Hotel) – in Google Ads, Search Ads 360, Display & Video 360, Editor and the API.
- Risk: if your actual CPA is much better than your target CPA and you do nothing, your actual CPA will move up toward the target.
- Action: audit all campaigns limited by budget over the last 12 months, compare target vs actual performance, then keep, align or redefine the target before August 17.
What actually changes
Today, when a Target CPA or Target ROAS campaign is constrained by its budget, the algorithm concentrates spend on the most efficient auctions. The frequent result: an actual CPA well below the target (or an actual ROAS above it). The flip side: as soon as you raise the budget, performance becomes hard to predict – CPA slipping, erratic volume, unexpected channel shifts on Performance Max and Demand Gen.
After August 17, 2026, the system will optimize consistently toward the target you entered, whether the campaign is limited by budget or not, including through budget adjustments.
Google’s official example
| Before August 17, 2026 | After August 17, 2026 | |
|---|---|---|
| Target CPA | €10 | €10 |
| Actual CPA | €5 (budget-limited campaign) | Gradually converges toward €10 |
| To keep €5 | – | Lower the target to €5 before the rollout |
The principle is the same with Target ROAS: a campaign at 800% actual ROAS with a 400% target may see its actual ROAS come back down toward 400%, with the algorithm using that headroom to chase more volume or conversion value.
Affected campaigns, strategies and platforms
Affected bid strategies
- Target CPA (tCPA);
- Target ROAS (tROAS);
- Target CPC, for Demand Gen campaigns only.
Not affected: manual CPC, target impression share, target CPM, and « Maximize conversions » / « Maximize conversion value » strategies without a target.
Campaign types: the full eligibility table
| Campaign type | Affected? |
|---|---|
| Search | ✅ Yes |
| Shopping | ✅ Yes |
| Performance Max | ✅ Yes |
| Demand Gen | ✅ Yes (including Target CPC) |
| Travel | ✅ Yes |
| Display | ✅ Already benefits from the new behavior |
| Hotel | ✅ Already benefits from the new behavior |
| App campaigns | ❌ No – behavior unchanged |
| Reach-focused video | ❌ No – behavior unchanged |
| Video views (CPV) | ❌ No – behavior unchanged |
Affected platforms
The change applies to campaigns managed in Google Ads, Search Ads 360, Display & Video 360 (Demand Gen), Google Ads Editor and via the Google Ads API. SA360 advertisers using portfolio strategies get a dedicated alert asking them to review targets at portfolio level.
Special cases: portfolios, shared budgets, total budgets
- Portfolio bid strategies and shared budgets: they are affected, but target adjustments must be made at the portfolio or shared budget level. In a portfolio without a shared budget, only budget-limited campaigns are impacted. For a limited shared budget, the impact is spread evenly across all campaigns in the group.
- Total campaign budgets: behavior unchanged – the feature keeps maximizing budget use over the defined period.
- Conversions: all types and sources are taken into account, including imported / offline conversions. Poorly calibrated offline tracking will therefore directly distort the new optimization logic.
What does not change (and misconceptions to avoid)
- This is not an auction change: Google Ads auction mechanics stay the same. Only the bidding behavior evolves.
- No automatic extra spend: your daily and monthly caps are still respected. The update does not increase your spend by itself.
- Campaigns not limited by budget don’t change: they already optimize toward their target, and will keep doing so.
- Google touches neither your targets nor your budgets: no automatic modification. Inaction is a choice – potentially a costly one.
- Smart Bidding Exploration is generally not affected: that feature is meant for campaigns not constrained by budget.
What are the risks if you do nothing?
The main risk concerns campaigns whose target has become obsolete: a tCPA set two years ago at €50 while the campaign has been converting at €30 for months. After August 17, without action on your side, you may see:
- a rise in actual CPA (or a drop in actual ROAS) toward the configured target;
- a shift in conversion volume and in the mix of queries / audiences activated;
- a redistribution of spend across channels on Performance Max and Demand Gen;
- a temporary fluctuation period while the algorithm recalibrates;
- in lead gen: more volume but potentially more expensive leads – a problem if your target no longer reflects your profitable acquisition cost.
Conversely, this isn’t necessarily bad news: if your target truly matches your profitability threshold, the algorithm will use the available headroom to capture more volume or value, with finally predictable behavior when budgets go up.
Your action plan before August 17, 2026
Step 1 – Identify all budget-limited campaigns… over 12 months
Don’t rely on today’s « Limited by budget » status: Google triggers its notifications for campaigns that were limited within the last 12 months. A campaign may only be constrained on weekends, during sales periods or in high season. Analyze:
- the status history and spend vs daily budget;
- the Search lost impression share (budget) – « Search lost IS (budget) » column – across several periods;
- upcoming seasonal peaks (back-to-school, Black Friday, holidays): a campaign comfortable in July may be limited in November.
Step 2 – Compare target and actual performance, campaign by campaign
For each identified campaign, build a table: target CPA vs actual CPA (30 / 90 days), target ROAS vs actual ROAS, conversion volume, share of spend. The target/actual gap is your exposure indicator: the wider it is, the stronger the potential impact of August 17.
Step 3 – Requalify the « right » target with your business data
This is the step many advertisers skip. The relevant target isn’t derived from the platform, but from your economics:
- E-commerce: target ROAS = 1 / acceptable contribution margin, factoring in returns, logistics costs and repeat purchases;
- Lead gen: target CPA = average customer value × lead-to-customer conversion rate × acceptable share of revenue. A low CPL with unqualified leads is fake performance;
- check tracking reliability (duplicate conversions, imported conversions, conversion values): after August 17, the algorithm will stick even more closely to the data you send it.
Step 4 – Decide with the Bid Target Adjustment Tool (available since July 6)
Clicking « Review campaigns » from the alert opens an explainer panel (with Google’s official video), then the list of affected campaigns with their recent performance against their current target:
The tool’s intro panel: « Review campaigns » opens the list of affected campaigns, « Keep my current targets » changes nothing.
The « Review your campaign targets » screen on an e-commerce account we manage (campaign names anonymized): recent performance against the current target, with the « Apply » link on outperforming campaigns.
In the list, an « Apply » link appears next to every campaign outperforming its target: one click aligns the target with recent performance. A pencil lets you enter a custom target, and the export icon downloads the full list. The tool shows performance history and offers three options – plus a fourth documented by Google in its help center:
- Keep the current target: if it reflects your true profitability threshold. Performance will converge toward the target and the algorithm will chase more volume.
- Align the target with recent performance: one click on « Apply » sets the target to actuals (e.g. tCPA €50 → €35) to preserve current profitability.
- Set a custom intermediate target: e.g. €42 between actuals (€35) and the old target (€50), to chase volume while controlling the drift. The bid simulator helps model the impact.
- Switch bid strategy: move to « Maximize conversions » or « Maximize conversion value » if your budget is strictly fixed and you accept a fluctuating CPA/ROAS. These strategies spend the full budget without a target.
Step 5 – Give budgets some headroom
Google recommends keeping a daily budget « comfortably above » average spend so campaigns aren’t constrained. After August 17, raising the budget of a well-targeted campaign becomes far less risky: performance will stay close to the target. Also consider grouping campaigns into a portfolio / shared budget to make better use of constrained budgets.
Step 6 – What NOT to do
❌ Don’t apply data exclusions or bid caps in reaction to this update: Google explicitly advises against it, as it creates volatility ;
❌ Avoid major migrations (e.g. moving to value-based bidding) right before the rollout: wait one to two conversion cycles after August 17 ;
❌ Don’t react to the first days of data, especially with long conversion cycles.
A real case: an e-commerce account we manage
To make the decision tangible, here are three real situations from an e-commerce account managed by Keyweo (June-July 2026 data, anonymized). The account has around twenty campaigns affected by the update – but they don’t all call for the same decision:
| Campaign | Target | Actual performance | Lost impressions (budget) | Our read |
|---|---|---|---|---|
| Shopping – core range | tROAS 355% | ROAS ~409% | 33% | Heavily budget-limited and well above its target: the most exposed profile. Without action, actual ROAS would fall back toward 355%. |
| Search – personalized product | tROAS 215% | ROAS ~257% | 38.5% | The most constrained in the account: nearly 4 in 10 impressions lost for lack of budget. The target/actual gap is significant – a decision is essential before August 17. |
| Demand Gen – retargeting | tCPA €14 | CPA ~€12.50 | 0% | Outperforms its target but isn’t budget-limited: the update’s impact will be marginal. Less urgent decision. |
How we decided on the Shopping campaign
After August 17, the target becomes a true volume ↔ profitability slider: the more permissive it is, the more the algorithm allows itself to pay for each conversion. We had three options:
- Target raised to 409% (the tool’s « Apply »): current profitability is locked in, volume stays unchanged;
- Target left at 355%: the algorithm would spend until ROAS drifts down toward 355% – maximum volume, but profitability down by about 55 points;
- Intermediate target at ~380%: we concede a bit of profitability (409 → 380%) in exchange for extra volume, in a controlled and measurable way.
We chose the intermediate target, validated against the client’s actual margin and quantified beforehand with the bid simulator (which estimates conversions, cost and value at several target levels). This campaign also becomes candidate #1 for a budget increase after August 17: that’s precisely the promise of the update – being able to raise budget without performance decoupling from the target.
The lesson from this case: systematically clicking « Apply » is not a strategy. It locks in profitability and gives up the volume the original target would allow. Every campaign deserves its own decision, grounded in margin and business goals – not a platform reflex.
After August 17: what to monitor?
- daily: spend, actual CPA / ROAS vs targets, conversion volume and value, impression share, spend distribution by channel (PMax / Demand Gen);
- business side: lead quality, actual revenue, margin – not just platform metrics;
- beware of forecasts: Performance Planner and budget recommendations may be inaccurate between August 17 and 31, while the tools are recalibrated;
- wait one to two conversion cycles before any conclusion or new structural adjustment.
The timeline to remember
| Date | Event |
|---|---|
| Since July 6, 2026 | Bid Target Adjustment Tool available + notifications in affected accounts (campaigns limited by budget within the last 12 months) |
| Before August 17, 2026 | Audit window: identify, compare, adjust targets |
| August 17, 2026 | Rollout of the new bidding behavior |
| August 17 – 31, 2026 | Forecasts (Performance Planner, recommendations) potentially inaccurate |
| Sept. – Oct. 2026 | Stabilization, then recalibration before Q4 (Black Friday, holidays) – the period when budget-limited campaigns spike |
In the same movement: Smart Bidding Exploration and Promotion Mode
This update is part of a broader Smart Bidding overhaul announced by Google:
- Smart Bidding Exploration – the philosophical opposite of the August 17 update: granting controlled flexibility to the ROAS target to explore queries and audiences the algorithm used to discard. Now rolled out globally on Search and feedless Performance Max, and in beta on PMax with feed and standard Shopping. Relevant for advertisers at their volume ceiling, to be tested gradually: more flexibility = a controlled profitability decrease in exchange for incremental conversions.
- Promotion Mode (beta) – for Search and Performance Max: schedule, for a defined period, a wider tolerance around the ROAS target and a temporary budget increase. Designed for launches, sales and flash deals, it should reduce the manual adjustments before/after commercial peaks.
Read together, these three changes show Google’s direction: the bid target becomes the central steering lever, with budget just a framing constraint. In other words, the quality of your targets – and of the conversion data feeding them – has never mattered more.
FAQ - Google Ads update of August 17, 2026
Budget-limited campaigns using Target CPA, Target ROAS (or Target CPC in Demand Gen) will optimize toward the configured target instead of being able to "outperform" it, including through budget adjustments.
No. No automatic changes. Advertisers must review and adjust their targets themselves, notably via the Bid Target Adjustment Tool.
No, their behavior doesn't change: they already optimize toward the defined target.
No, not directly. Daily and monthly caps remain respected. It aims to make budget scaling predictable, not to spend more behind your back.
No. The auction doesn't change; only the behavior of automated bid strategies evolves.
Yes, including in Search Ads 360. Target adjustments must then be made at the portfolio or shared budget level, and the impact of a limited shared budget is spread across all campaigns in the group.
Yes. All conversion types and sources (online and offline) feed the new bidding behavior - hence the importance of reliable offline imports.
If you want to keep that level, lower the target to actuals before August 17 (the tool's "Apply" option). Otherwise, keep it or choose an intermediate target to chase more volume.
Google recommends waiting one to two conversion cycles, and being wary of platform forecasts between August 17 and 31.
No. Neither manual CPC, nor target impression share, nor target CPM are affected.
Have your campaigns audited before August 17 with Keyweo
This update rewards advertisers with accurate targets and reliable tracking – and penalizes accounts run on autopilot. Keyweo, an SEA agency, supports its clients across the whole chain: auditing budget-limited campaigns, requalifying CPA / ROAS targets from your margin and lead-quality data, securing online and offline tracking, structuring bid portfolios and post-rollout monitoring.
Seeing the alert in your account and unsure how to decide? Contact our SEA experts for an audit of your bid targets before August 17, 2026.
