Update: The change took effect on 17 August 2026 and, following a gradual global rollout completed by late August, is now fully live across affected accounts. The Bid Target Adjustment Tool remains available in Google Ads, so you can review historical performance and reset targets whenever you choose.
Since 17 August 2026, budget-limited campaigns using Target CPA or Target ROAS optimise toward the target you set, rather than the stronger result they had been quietly delivering. If the alarmist “your costs are about to jump” posts caught your eye, take a breath. This change is real, but it is not a reason to panic. It is a reason to check your numbers. Here is what Google actually changed, what the fast commentary keeps getting wrong, and how we, as an experienced agency, think it through.
What changed in Google Ads bidding in 2026?
The mechanics matter, so let us be precise. Previously, when a campaign carried a Limited by budget status on a target-based bid strategy such as Target CPA or Target ROAS, a tight budget concentrated spend in the strongest, cheapest auctions. Many campaigns beat their target as a result, then swung around whenever budgets were adjusted.
The new behaviour is steadier. Budget-limited campaigns now optimise more consistently toward the target you set, not the better number they happened to achieve, including when you change budgets. Google frames this as a predictability improvement, and Smart Bidding now distributes your existing budget across a broader range of relevant auctions rather than crowding into the cheapest ones.
Two points anchor everything that follows. Google does not guarantee an exact figure; its own language is that campaigns optimise more consistently toward the target. And Google is not resetting anything on your behalf. It will make no automatic adjustments to your targets or budgets, so reviewing and updating them sits with you or your agency. The catch is simple: many live targets were set months or years ago and no longer reflect current performance. That gap is where the risk lives.
Where the change applies across Google’s systems
The update reaches further than Search. It applies to Target CPA and Target ROAS across Search, Shopping, Performance Max, Demand Gen, Display, Hotel and Travel campaigns, plus Target CPC on Demand Gen. It flows through Google Ads, Search Ads 360, Display & Video 360, Google Ads Editor and the Google Ads API, so behaviour stays consistent wherever you manage those campaigns. One reassuring detail: Display and Hotel campaigns already operate this way, so nothing changes for them.
Why would my CPA rise if I changed nothing?
This is the question driving most of the worry, and the honest answer is straightforward. Take Google’s own worked example. Your budget-constrained campaign carries a £10 Target CPA but has been achieving £5. You change nothing. Once the update applies, that campaign starts delivering closer to the £10 target you originally set. An advertiser used to a £5 CPA could see a real reduction in efficiency without touching the budget or the target.
This is exactly where the panic gets it wrong, so two corrections matter.
- First, a target is an efficiency objective, not a spend instruction. An £80 Target CPA does not hand Google permission to spend £80; it asks the system to generate conversions at roughly £80 each on average. Google has been explicit that this update does not directly increase spend, and that budgets remain respected.
- Second, a Target ROAS is not a ceiling or a cap. It is the return you are asking the system to hold. Under the new behaviour, a budget-limited campaign can scale closer toward the return figure you set, so an outdated ROAS target shapes the result exactly as an outdated CPA does.
The scaling picture makes it click. Imagine a campaign running at £100 a day with an £80 Target CPA, actually delivering around £45. Under the old model, raising that budget to £300 often let the CPA drift toward £80, with results wobbling as you scaled. Under the new model, efficiency holds steadier as spend grows, which is the practical upside Google is chasing.
Google’s own fix is measured, not dramatic. If the target already reflects your commercial goal, no action is required. If you want to preserve the stronger performance you were getting, move the target toward your recent actual figure. You decide the commercial target; Google’s bidding system now optimises more consistently towards it.
Which campaigns are affected, and which are not?
Scope is narrow and specific, and precision matters. The table below shows exactly where you stand.
| Campaign or strategy | Affected? | What it means for you |
| Budget-limited, Target CPA | Yes | If you have been beating a stale target, your cost per conversion may drift up toward the figure you set. Review the target against recent actual performance before anything else. |
| Budget-limited, Target ROAS | Yes | A target set lower than you were achieving now pulls your return down toward it. Reset the ratio to the return you genuinely want to run at. |
| Performance Max or Demand Gen, budget-limited | Yes | Efficiency holds closer to target, and traffic may shift across channels. Read the channel breakdown, not just the headline number. |
| Manual CPC | No | You set every bid by hand, so there is no automated target to re-baseline. Nothing changes here. |
| Currently not budget-limited | No | These campaigns are already delivered to target, so they carry on as before. If one later becomes Limited by budget, the new behaviour will apply, so keep it on your radar. |
| App, Video reach, Video view | No | These types keep the previous bidding behaviour and sit outside the update entirely. |
Multi-channel campaigns deserve one extra note. If you run Performance Max or Demand Gen, the update may change how spend is allocated across channels, not only your cost per acquisition. A steady overall figure can hide movement underneath it, so check the channel view before drawing conclusions.
What this update does not change
It helps to be equally clear about what stays the same. Your budgets are respected in full; the change does not spend more of your money on its own, because a target governs efficiency, not spend. Manual CPC and Target Impression Share are untouched. Campaigns that were never budget-limited pass by unaffected. And Google does not reset, raise or invent targets for you. The only thing that has changed is how faithfully the system optimises toward the number already in your account.
One honest caveat separates careful analysis from hot takes: Google described the direction of the behaviour, not its magnitude. No reliable percentage impact has been published, so anyone quoting a precise figure for how much your costs will move is guessing. The sensible response is to read your own account, not someone else’s headline.
The tool Google gave you, and five ways to respond
You are not left to work this out blind. Google’s Bid Target Adjustment Tool has been available since 6 July 2026 and remains live. Reach it through the Review your campaign targets notification at the top of your account, or from the bidding settings on the Campaigns page. Treat any figure it suggests as an input to a decision, not an instruction to follow blindly. Recent CPA or ROAS tells you what a campaign has achieved; it does not tell you the optimal commercial target. That call has to weigh margins, lead quality, growth ambitions and available demand.
- Keep the target – If it already reflects your commercial goal, leave it, and accept that overperforming campaigns will settle toward the number you set.
- Match recent performance – If you want to preserve recent efficiency, move Target CPA down toward your recent actual CPA, or move Target ROAS up toward your recent actual ROAS.
- Set a custom number – Enter the figure that reflects your real profit position, not simply your best recent result.
- Switch strategy – For a genuinely fixed budget, a no-target approach such as Maximise Conversions lets budget act as the only constraint.
- Increase the budget – If your target accurately reflects the business goal, additional budget can give Google more room to capture available conversion volume while aiming towards that target.
A worked example is worth pausing on. Say a campaign runs an £80 target but has been delivering £45, and you know you stay profitable up to £65. Snapping the target straight down to £45 locks in efficiency but may throttle volume you could happily afford to buy. Somewhere around £55 to £60 is often the smarter middle.
Google does not require you to change targets in fixed increments, and Smart Bidding can respond to both large and small adjustments in real time. What matters is patience once the change is made, allow around one to two conversion cycles before judging the new performance, rather than reacting to the first few days.
What does this really mean for a business owner?
If you run your ads on autopilot, this update means set-and-forget bidding has become considerably riskier. A target can no longer be entered once and left to run for years, because a loose or outdated number now influences campaign efficiency far more directly than advertisers have been used to. The accounts most exposed are those running well ahead of a figure nobody has revisited in a year. If your target still matches your goal, the practical impact is likely modest. The larger swings land on campaigns that were quietly beating a stale number.
The businesses best positioned for this change are those with accurate conversion tracking, commercially realistic targets tied to their margins, and regular account management rather than autopilot. None of that is glamorous, and all of it is within reach.
How we approach it for our clients
We work a consistent sequence rather than reacting to the loudest headline.
First, we review every budget-limited campaign, comparing the live target against recent actual performance. For higher-volume accounts that comparison sits around a 30-day window; lower-volume or longer sales-cycle businesses need a broader one to give a fair read. That gap between target and reality is where the risk lives, and the fastest route to what needs attention.
Second, we feed Google clean conversion data. Accurate tracking across online and offline conversions is what lets the platform aim at the right number in the first place. For lead generation this makes conversion quality decisive: Google can optimise toward the conversion event we hand it, but it cannot tell a weak enquiry from a genuine sales opportunity unless that distinction is fed back into the platform.
Third, we set targets from your commercial goals: your margins, your lead quality, and what a customer is genuinely worth to you, rather than a figure someone typed in eighteen months ago.
Fourth, we question whether a campaign needs an efficiency target at all. Where the priority is maximum volume from a fixed budget, Maximise Conversions can be the better fit. Where there is a defined acceptable acquisition cost, Target CPA gives Google a clearer objective. The bidding strategy should follow the commercial objective, not the other way around.
Automation raises the stakes on strategy
There is a wider pattern worth naming. As our PPC Specialist, Sagar, puts it:
“Automation replaces manual bidding, not strategic decision-making. That distinction matters more with every release Google ships. The machine now decides the individual bids. You decide the target, the data, and the commercial logic behind both.”
That direction is unmistakable across Google Ads in 2026. Ahead of Google Marketing Live, Google announced a run of bidding and budgeting updates that all point the same way. Journey-aware Bidding, in beta, lets Search campaigns on Target CPA learn from the full lead-to-sale journey rather than leaning on front-end actions like form fills. Smart Bidding Exploration, which helped Search campaigns reach 27% more unique converting users on average, is expanding into Performance Max and Shopping. And demand-led budget pacing now flexes daily spend toward periods of stronger predicted demand while holding within your monthly budget.
Every one of those features leans on the quality of the data you feed it. Get the inputs right and Smart Bidding works for you. Get them wrong and it scales the error. The bids are automated now; the judgement behind them is not, and that judgement is the work.
Frequently asked questions
Do I have to do anything right now?
Not necessarily. If your target already reflects the return or cost per conversion you genuinely want, no action is required. If your budget-limited campaigns have been beating a stale target, review them in the Bid Target Adjustment Tool and adjust deliberately.
Will my budget rise automatically?
No. Google does not change your budget or your bidding target for you. A target controls efficiency; your budget controls spend. Both stay under your control.
Does this affect Performance Max?
Yes, where a Performance Max campaign is budget-limited on a target-based strategy. You may also see traffic redistribute across channels, so review the channel breakdown rather than judging on the headline figure alone.
How do I know if I was overperforming?
Check the gap between your set target and your recent actual CPA or ROAS. A campaign delivering well below its Target CPA, or well above its Target ROAS, was overperforming and is the most likely to move toward the stated number now.
What should I do now that the change is live?
Compare each budget-limited campaign’s recent actual CPA or ROAS against its configured target. Where there is a gap, use the Bid Target Adjustment Tool or set a fresh target from your margins and goals, treating any suggested figure as a starting point rather than an instruction.
Get your targets right, and keep them right
Growth does not happen by accident. It is built, strategy by strategy, click by click. If your bidding feels like a black box after this update, we can review every budget-limited campaign, clean your conversion data, and set targets that reflect your real commercial goals. As a full-service digital agency, we bring creativity, technology and hard commercial thinking to every target we set.
Start the conversation with Trident. Call us on 01455 557766 and let us make your Google Ads work as hard as you do.
Book an Appointment 