Can You Add Negative Keywords to Performance Max?

Yes — and the feature grew up in 2025

For years, the honest answer was "sort of." Negative keywords in Performance Max existed but were buried behind a support request, and the cap sat at one hundred terms. That changed. Google raised the per-campaign limit from 100 to 10,000 negative keywords in March 2025, according to PPC Land.

So the stale advice still floating around the top of search results — "you can't really control PMax queries" — is wrong as of this year. You now have the same keyword-exclusion headroom you'd get in a Search campaign.

This matters because PMax is mostly a Shopping engine wearing a multi-channel costume. smec reports that 74–97% of PMax spend flows to feed-based Shopping-style ads for retailers. Negatives let you steer that spend away from queries that will never profit.

Where PMax negative keywords actually apply

This is the line almost every competing article gets vague about, so read it twice. Google's documentation states that Performance Max negative keywords apply to Search and Shopping inventory only.

They do not suppress your ads on Display, YouTube, Gmail, Discover, or Maps. Those placements aren't driven by a text query, so a keyword negative has nothing to match against. If your waste is a cheap-impression Display spray, negative keywords are the wrong tool — audience and placement controls are.

For most POD stores the search-and-shopping surface is where the money moves, so keyword negatives still do real work. Just set your expectation correctly: you're pruning query waste, not every placement.

How to add them: account level vs campaign level

You have two levers, and they behave differently.

Account level is the blunt, safe instrument. Negatives set here apply across all Search and Shopping inventory, including every Performance Max campaign, per Google's help docs. This is where irrelevant category terms, competitor names, and chronic no-buy modifiers like "free," "diy," or "template" belong.

Campaign level is the scalpel. In the Keywords section, open the Negative keywords tab, click the plus, pick the specific PMax campaign, and paste your terms one per line with the usual broad, phrase, or exact match syntax. Use this when one campaign is drifting into queries another campaign should own.

A practical sequence for an operating account: start with an account-level list of universal junk, then layer campaign-level negatives only where the search-terms report shows a specific leak. Don't paste a thousand guesses on day one — you'll starve auctions you actually want.

Negative keywords are not brand exclusions — you need both

Here's the trap that costs operators the most. People reach for negative keywords to stop PMax from eating their own branded search. That's the wrong tool.

PMax gravitates to brand terms because they're the cheapest conversions in the account, which inflates its reported ROAS while adding zero incremental orders. The fix is account-level brand exclusions, a separate control available since 2024 that covers brand variants and misspellings, as AdNabu documents.

Think of it this way: brand exclusions handle your name; negative keywords handle everyone else's junk — "free," "cheap," "how to make," competitor brands, and off-catalog categories. Use brand exclusions for cannibalization and negatives for query waste. We walk through the whole cannibalization problem in our guide to Google Ads economics.

The profit math: what one junk query theme costs

Competing articles tell you negatives "save money." They never show you how much, so the advice feels optional. Let's make it concrete.

Say you run $4,000/month through one PMax campaign. Retail-category search clicks averaged $4.14 in LocaliQ's 2026 benchmark data — treat that as illustrative, not your exact number.

Now your search-terms report shows a cluster of "free svg" and "diy mug" queries pulling 90 clicks a month. At roughly $4 a click that's $360/month, or about $4,300 a year, spent on people who were never going to pay for a finished product.

Compute: 90 clicks × $4.00 = $360/month. That's 9% of this campaign's budget. Those clicks convert near zero, so almost the entire $360 is pure loss — not low-ROAS spend, dead spend.

Why dead spend hurts more than it looks

Contribution margin is the reason. Say you sell a mug for $24, and base cost, shipping share, and processing fees leave you $9 per order. That's a 37.5% margin, so your break-even ROAS is 1 ÷ 0.375 = 2.67x. Every ad dollar has to return $2.67 just to stay even.

So the $360 you reclaim by excluding junk queries isn't worth $360 of profit — it's worth the roughly $135 of gross margin you'd have burned generating zero sales (360 × 0.375), plus the budget now freed to chase queries that clear 2.67x. Negatives don't just cut cost; they redirect the machine toward auctions your margin can actually survive. If you're unsure what target to feed PMax, start with our breakdown of what counts as a good ROAS for Google Ads.

Find the queries worth excluding first

Don't guess at negatives — mine them. PMax finally exposes a full search-terms report, so you can see the actual queries, just like Standard Shopping. Sort by cost, flag the high-spend/zero-conversion terms, and those become your negative list.

This also tells you whether the waste is even query-based. If your lost spend is on terms, negatives fix it. If it's on placements, it won't show up here — a sign to look at your Search vs Performance Max split instead of adding keywords.

Rising click costs make this audit non-optional. About 87% of industries saw year-over-year CPC increases, averaging roughly 12.9%, per WordStream's 2025 benchmarks via Search Engine Land. When every click costs more, the queries you don't buy matter as much as the ones you do. If you want to see which terms rivals are winning, our note on spying on Google Shopping ads covers the competitive read.

Where PodVector AI fits

Pulling the search-terms report, tagging the dead queries, and keeping the negative list current is weekly grind that most operators skip until a month's spend is gone. That's the job Victor, the AI employee inside PodVector AI, is built for.

Victor is a full Google Ads operator — he reads your live search-terms data, computes true per-order profit so a "good ROAS" query is judged on margin not revenue, and drafts the exact negative keywords to add. Every write action is approval-gated, so Victor proposes the exclusions and you approve the send before anything touches your account. Victor is not a dashboard you log into to read charts; he does the pruning and asks you to sign off. Running a Shopping-heavy account and want this handled end to end? Our Google Shopping ads agency breakdown shows where that fits.

Put Victor on your Google Ads waste — start free

FAQs

Do negative keywords work the same in Performance Max as in Search campaigns?

Mostly, yes. You use the same broad, phrase, and exact match types, and as of the 2025 update the per-campaign limit now matches Search at ten thousand terms. The difference is scope: in PMax they only filter Search and Shopping inventory, so they can't touch Display or YouTube placements the way campaign-level controls do elsewhere.

How many negative keywords can I add to a Performance Max campaign?

Up to 10,000 per campaign. Google raised the cap from 100 in March 2025, according to PPC Land. That's far more than most stores need — a tight list of chronic junk terms beats a sprawling one that accidentally blocks real buyers.

Should I use negative keywords or brand exclusions to stop branded traffic?

Brand exclusions. They're a dedicated account-level control for your own brand terms and their misspellings, as AdNabu explains, and they're cleaner than trying to list every brand variant as a negative. Save negative keywords for everyone else's junk — "free," "diy," competitor names, and off-catalog categories.

Will adding negative keywords hurt my Performance Max performance?

Only if you over-prune. A short list targeting genuinely irrelevant, zero-conversion queries reclaims wasted spend without starving good auctions. Pasting hundreds of speculative terms can block queries that were quietly converting, so mine your search-terms report and exclude what the data proves is dead — don't guess.

Do negative keywords block Display and YouTube placements in PMax?

No. Google's documentation confirms PMax negative keywords apply to Search and Shopping inventory only. If your waste is on Display, YouTube, Discover, or Gmail, keyword negatives won't touch it — you'd look at placement, audience, and asset-group controls instead.