PMax brand exclusions: setup, step by step.
The single highest-leverage fix in most PMax accounts takes about twenty minutes. Here is the exact procedure and how to verify it worked.
If we could make one change to every Performance Max account on earth, it would be this one. PMax, left to its own devices, serves against searches for your own brand name — the cheapest, highest-converting traffic you have — and reports the results as campaign performance. The campaign looks exceptional. The spend is buying almost nothing, because brand searchers were coming anyway. Excluding brand takes about twenty minutes and is the fastest route to an honest read on what PMax actually contributes.
Why this happens by design
PMax bids toward the target you set. Brand searches convert at multiples of non-brand rates and cost a fraction as much, so any value-maximizing system takes them first — it is the rational move given the instruction. Google is not hiding this; the controls exist. But the default is inclusion, and defaults win in accounts nobody audits. The result we see repeatedly: a PMax campaign reporting 8-12x ROAS that drops to 2-3x once brand is removed. The second number is the real one, and it is the only number you can make budget decisions with.
The setup, in order
- Create a brand list. In Google Ads, under the shared library, define your brand entity — Google matches against known brands, so if yours is not listed, request it. Include common misspellings and the no-space variant of multi-word names.
- Attach the brand list as an exclusion in each PMax campaign's settings. This is the primary mechanism: it blocks brand-adjacent queries on Search and Shopping inventory using Google's own brand matching, which catches variants a keyword list misses.
- Add campaign-level negative keywords as the backstop. PMax supports negative keywords at the campaign level; add your brand terms and close variants there too. Belt and braces — the brand list handles fuzzy matching, the negatives handle the terms you know exactly.
- Check your Search campaigns. If a dedicated brand Search campaign exists (it should — you want brand traffic, just priced and reported honestly), confirm it is capturing the traffic PMax now releases.
- Annotate the change date. Everything in the account shifts when brand moves between campaigns, and in three months nobody will remember why the trend line bends.
How to verify it worked
Do not trust the setting; verify the behavior. Watch your brand Search campaign impressions in the week after — they should rise as PMax stops competing for the same queries. Watch PMax spend redistribute toward Shopping and non-brand Search. And expect the campaign's reported ROAS to fall. That fall is not damage. It is the removal of a subsidy, and the number you are left with is the number that was always true.
Expect a stakeholder conversation. Someone will see PMax ROAS drop from 9x to 3x and conclude the account is in trouble. Prepare the account-level view in advance: total revenue, total spend, blended return. If those held steady while campaign-level numbers reshuffled, you did not lose performance — you found the truth.
When brand inclusion is defensible
Two honest exceptions. Competitor pressure: if rivals bid aggressively on your brand and your dedicated brand campaign is not defending well, letting PMax also compete can be part of the defense — deliberately, and measured. And genuinely unknown brands: if nobody searches your name yet, exclusion changes nothing and can wait until it does matter. For everyone else, the exclusion should be standing policy, reviewed whenever new brands, product names, or acquisitions enter the account.
This piece is part of our PMax series — the plain-English overview covers when to run the campaign type at all, how to actually control Performance Max sets this exclusion in the context of every other lever and shows what removing the brand slice does to your reported ROAS, and the brand vs non-brand measurement piece covers why this split matters everywhere, not just in PMax.
How do you exclude brand traffic from Performance Max?
Two mechanisms, used together. The primary one is a brand list defined in the shared library and attached as an exclusion in each PMax campaign settings — it blocks brand-adjacent queries using Google own brand matching, which catches variants a keyword list misses. The backstop is campaign-level negative keywords covering your brand terms and close variants. The brand list handles fuzzy matching; the negatives handle the terms you already know exactly.
Will my ROAS drop after adding brand exclusions to PMax?
The campaign-reported figure almost certainly will, and that is the expected outcome rather than damage. We routinely see a PMax campaign reporting 8-12x fall to 2-3x once brand is removed — the second number is the real one. What should hold steady is the account-level view: total revenue, total spend, blended return. Prepare that view before you make the change, because someone will see the campaign number move and conclude the account is in trouble.
How do you verify a PMax brand exclusion is actually working?
Do not trust the setting, watch the behavior over the following week. Brand Search campaign impressions should rise as PMax stops competing for the same queries, PMax spend should redistribute toward Shopping and non-brand Search, and the campaign reported ROAS should fall. Annotate the change date too, because everything in the account shifts when brand moves between campaigns and in three months nobody will remember why the trend line bends.
Is it ever right to let Performance Max bid on your brand?
There are two defensible exceptions. If competitors bid aggressively on your brand and your dedicated brand campaign is not defending it well, letting PMax also compete can be part of that defense — deliberately and measured, not by default. And if nobody searches your name yet, exclusion changes nothing and can wait until it matters. For everyone else the exclusion is standing policy, reviewed whenever new brands, product names, or acquisitions enter the account.
Written by The ADSRUNNER team. If this resonated and you want to apply it to your own account, you can book a strategy call or run a free audit.
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