Verified 6 May 2026. Performance Max features change every three to six months; review and update annually or sooner if Google ships a major PMax update.
You open Google Ads on a Tuesday morning. Cost per lead up 40% over six months. Conversions down. Your Google rep emails a 30-minute slot to “discuss budget options”. The pitch always lands the same way: spend more, give the algorithm room to work, trust the system.
If you run a Melbourne small business and that scenario is familiar, you are not alone. Performance Max campaigns have rewritten how Google Ads works since 2022, and they sit at the heart of most Australian SMB accounts. The campaign type can produce strong results. It can also bleed money in ways that are hard to see until the quarterly numbers land. The reason your cost per lead keeps creeping up is rarely random, and it is rarely fixed by spending more.
This is what’s happening inside the campaign, and what to do about it.
Performance Max is a single campaign that runs ads across Search, YouTube, Display, Discover, Gmail, and Maps. You give Google your assets, your conversion goals, and your audience signals. The algorithm decides where to show what to whom.
Three things change the moment you turn one on:
This is the trade-off. You give up control. You hope the algorithm finds people you would not have reached on Search alone.
When the algorithm has full discretion and a conversion goal to chase, it tends toward the path of least resistance. For a small business, that path usually leads to higher cost per lead over time. Three patterns drive most of the inflation.
The compound effect over six months is the rising CPL chart you are looking at this morning.
The case for switching off PMax entirely is rarely as strong as the dashboard suggests. Before you do anything dramatic, run through four checks. They take less than an hour, and they tell you whether the campaign is salvageable.
If those four checks point in the same direction, you have your answer. If they point in different directions, the campaign needs surgery rather than a shutdown.
PMax is not the right campaign type for every business. It is also not the wrong one for every business. Where you sit depends on your model, your budget, and what you sell.
| Lean in when… | Fight it when… |
|---|---|
| You sell visual products with strong creative assets (retail, fashion, food). | You sell professional services where lead quality matters more than volume. |
| You have a Google Merchant Center feed and benefit from Shopping integration. | Your monthly budget is under about $3,000 and placement waste is fatal. |
| You have a high-intent niche but want incremental reach across surfaces. | Your business has strong local search demand and does not need Display reach. |
| You run multiple asset groups and can monitor reporting weekly. | Your audience converts on Search alone and does not need YouTube or Discover. |
Fighting it does not mean turning it off. It means structuring your account so PMax does the job it is good at (incremental reach across surfaces) and Search campaigns capture the high-intent, high-quality traffic. The mature setup runs both: dedicated branded Search, dedicated non-branded Search on your highest-converting terms, and PMax with brand exclusions handling everything else. This is the structure most experienced PPC agency teams will recommend in 2026.
Your Google rep is helpful. Your Google rep is also paid on revenue. When the rep recommends increasing your PMax budget, that recommendation comes through a filter that does not always match your business goals.
Three things to ask in the next quarterly review:
The rep cannot always answer the third question, because the modelling tools they work with assume you stay inside the PMax structure. That is a useful piece of information by itself.
Pull your CRM data on the last 90 days of leads and split close rate by source. If PMax leads close materially below Search leads, you have your answer.
You do not need an audit. You need a sanity check. Open Google Ads now and do four things.
Twenty minutes. Four numbers. You will know whether the campaign needs a tweak, a restructure, or a different conversation altogether.
If the diagnostic points to a restructure rather than a tweak, a partner who has done this work across dozens of Melbourne accounts can rebuild the structure around brand exclusions, dedicated Search campaigns, and a tighter PMax footprint. Google has shipped meaningful transparency improvements in early 2026: channel-level spend reporting, Search Partner Network placement visibility, and first-party audience exclusions. The structural ability to opt out of specific channels has not arrived yet. Until it does, the work of guiding PMax toward profitable inventory sits with the advertiser, not the algorithm.
If you would rather hand that work to someone who already knows where the leaks tend to be, that is a conversation worth having.
Performance Max is a single Google Ads campaign type that runs ads across Search, Shopping, YouTube, Display, Discover, Gmail, and Maps. You provide assets, conversion goals, and audience signals; Google’s algorithm decides who sees which ad on which surface. It launched broadly in 2022 and is now the default campaign type Google reps recommend to most advertisers.
The most common cause is that the algorithm has drifted toward cheaper Display, YouTube, or Discover inventory that produces low-quality conversions. Other contributors include brand cannibalisation (PMax bidding on your own business name), broader search query matching than a Search campaign would allow, and weak creative assets dragging down asset group performance. Increased competition in your auctions can also play a part, but it rarely explains a 30 to 50% rise on its own.
Turning it off entirely is rarely the right answer. The mature approach is to apply brand exclusions, run dedicated Search campaigns on your high-intent and branded terms, and let PMax handle incremental reach across surfaces. If your PMax campaign has poor channel reporting visibility, weak creative, no brand exclusions, and a small budget, restructuring is more useful than switching off.
Yes. Use Brand Exclusions inside the PMax campaign settings, which apply across both Search and Shopping placements. Account-level negative keywords work as a backup but are less precise. Brand exclusions are the cleanest way to stop PMax from competing with your branded Search campaign for traffic that would have come to you anyway.
It can, but the smaller your budget, the more vulnerable you are to placement waste. Service-based small businesses with monthly budgets under about $3,000 often see better results from a focused Search campaign with tightly themed keywords and strong landing pages. Visual product businesses with Merchant Center feeds tend to do better with PMax because the Shopping integration adds incremental reach the campaign type was built for.
Allow at least 4 to 6 weeks for the algorithm to exit the learning phase. After that, the diagnostic above gives you a fair read. If channel allocation looks wrong, brand cannibalisation is happening, and lead close rates are dropping, you have enough data to act. Six months of waiting “for the algorithm to settle” is rarely the right call when CPL has been climbing the whole time.
