On August 17, 2026, Google changes how budget-limited campaigns spend and if you don’t audit your account first, your best-performing campaigns could quietly start costing more. The change isn’t optional and Google won’t adjust anything for you, so the only thing that decides your outcome is what you do before the deadline.
This isn’t another recap of the announcement. It’s the exact audit to run, the three decisions to make per campaign, and how to use the new Bid Target Adjustment Tool (live in accounts from July 6). Skip to the audit if you already know the background. Running portfolio bid strategies (one shared target across several campaigns)? The review works differently, see our portfolio bid strategy guide.
- Budget-capped campaigns using Target CPA or Target ROAS often beat their targets today. After Aug 17 they’ll deliver closer to the target you set.
- If your targets are out of date, cost per lead rises or ROAS slips, on the same budget.
- Google won’t change your targets or budgets. You act, or you accept the drift.
- Your window: July 6 – August 17, 2026. The Bid Target Adjustment Tool shows your history and lets you fix targets in a few clicks.
What’s actually changing
Today, a “Limited by budget” campaign forces Google’s bidding system to compete only for the cheapest, highest-intent conversions. That budget cap has been a hidden efficiency lever campaigns frequently deliver better than their stated target.
From August 17, that lever switches off. Budget-limited Target CPA and Target ROAS campaigns will optimize more consistently toward the number in your settings, even when you adjust budgets. Google frames it as more predictable performance genuinely useful for scaling, but a risk for anything that’s been over-delivering.
After August 17, your target becomes the dial that controls efficiency not your budget.
A worked example
| Before Aug 17 | After Aug 17 (no action) | |
|---|---|---|
| Target CPA | $10 | $10 |
| Actual CPA | ~$5 (over-delivering) | ~$10 (pulled to target) |
| Same budget buys | More conversions | Fewer, pricier conversions |
The spend doesn’t change what it buys does. A campaign quietly running at $5 against a $10 target will trend toward $10 unless you reset the target to $5 first.
Where the real risk sits and two things most advertisers miss
The campaigns most exposed here aren’t the ones you actively manage they’re the quiet performers you stopped touching. The widest gaps almost always sit on long-running Search and Shopping campaigns whose Target CPA or ROAS was set at launch and never revisited: the account got more efficient over the years, but the target stayed frozen at its original, more conservative number. Those are the campaigns where “do nothing” costs the most on August 17.
Two things are worth flagging that aren’t obvious from the announcement. First, don’t accept the tool’s suggested target on autopilot, it’s anchored to recent performance, so a single unusual month (a seasonal spike, a tracking gap, a promo) can drag the recommendation somewhere you don’t want to live for the rest of the year. Sanity-check it against a full conversion cycle before you apply it. Second, on Performance Max and Demand Gen this change can quietly shift how traffic is split across channels so a campaign can still hit its target while its channel mix, and the type of conversions you’re winning, moves underneath you. Watch the channel breakdown, not just the headline CPA.
Who’s affected
Both conditions must be true: the campaign is Limited by budget and uses a target-based bid strategy (Target CPA, Target ROAS, or Target CPC for Demand Gen).
In scope: Search, Shopping, Performance Max, Demand Gen, Travel.
Not affected: App, Video reach, and Video view campaigns. Hotel and Display already use this behavior. Campaigns with unconstrained budgets are unchanged.
It rolls out across Google Ads, Search Ads 360, Display & Video 360, Google Ads Editor, and the API so treat it as account-wide. (Full details in Google’s official Help Center article.)
The Bid Target Adjustment Tool (live July 6, 2026)
From July 6, an in-account notification points affected advertisers to a new tool that surfaces each campaign’s historical performance and lets you review and apply new targets before the deadline. Notifications trigger for anyone whose campaigns were limited by budget at any point in the last 12 months a broad net that may surface campaigns you’d forgotten about.
The pre–August 17 audit (step by step)
- Pull the list. Filter campaigns by “Limited by budget” status and isolate those on Target CPA or Target ROAS.
- Compare target vs. actual over the last 30–90 days. The biggest gaps are your biggest risks.
- Decide intent per campaign. Was the target a deliberate efficiency lever, or did it just drift out of date? Deliberate levers get reset before the deadline; drifted targets you can accept and monitor.
- Realign targets. For deliberately capped, efficient campaigns, reset the target to true recent performance. Review the tool’s auto-suggestion by hand one unusual month can skew it.
- Protect intentional caps. Where budgets must stay capped (cash flow, strict CAC, finite sales capacity), lower the target to insulate against rising costs.
- Record baselines for click cost, conversion volume, and CPA/ROAS before Aug 17 so you can measure the shift.
- After any change, wait 1–2 conversion cycles before judging results.
Your three options per campaign
1. Lock in current performance
Over-delivering and want to keep it? Lower the target to match recent actuals (drop $10 to $5).
2. Keep the target
Happy to trade some efficiency for consistency? Do nothing but make it a decision, not an accident.
3. Scale up
An over-delivering capped campaign is telling you there’s more profitable volume out there. Raise the budget and capture it at your stated target scaling is more predictable after the change.
Deliberate budget cap? Google’s house advice leans toward “demand-led budgets” i.e. remove your caps. If you cap on purpose (cash flow, CAC discipline, limited capacity), uncapping isn’t the fix. Re-tune the target so your efficiency survives without the cap doing that work.
Timeline
- July 6, 2026 Tool live; notifications begin.
- July – August 2026 Your window to audit and adjust.
- August 17, 2026 New behavior takes effect automatically.
- Late Aug – Sept 2026 Expect a noisy few weeks as the system recalibrates.
FAQ
When does the change take effect?
August 17, 2026. Budget-limited Target CPA/ROAS campaigns start optimizing more consistently toward their set target, even when budgets change.
Will Google change my targets or budgets automatically?
No. The performance shift is automatic, but any target or budget change is yours to make.
Which campaign types are affected?
Search, Shopping, Performance Max, Demand Gen, and Travel on Target CPA/ROAS (plus Target CPC for Demand Gen). App, Video reach, and Video view are not affected; Hotel and Display already use this behavior.
What happens if I do nothing?
Over-performing campaigns drift toward their stated targets, so cost per lead rises or ROAS slips on the same budget. If your targets already match your goals, no change may be needed but confirm that on purpose.
Does this change the ad auction?
No. It’s strictly a bidding change; auction mechanics are unchanged.
Bottom line
The update ships whether you act or not. Pull your “Limited by budget” report, compare targets to real performance, and reset the numbers that have drifted. Advertisers who move early keep their efficiency or scale on their own terms; the ones who wait watch costs climb and react late.
Want us to audit your account before August 17? Book a free review →
