Performance Max Negative Keywords: The Complete Guide to the 10,000 Cap

Quick answer: yes, Performance Max supports negative keywords - properly, at last. Since March 2025 you can add up to 10,000 campaign-level negative keywords per PMax campaign, up from a cap of 100 that for years you could only reach by filing a request with a Google rep. Since August 7, 2025, you can also attach shared negative keyword lists to PMax campaigns, and account-level negative keywords apply to PMax automatically. Combined with the native PMax search terms report Google rolled out in 2025, you can finally see what PMax matched you to and block what you never wanted. This guide covers how to add negatives at each level, what to add first (including the brand question, argued honestly from both sides), how to build lists without guessing, and - just as important - what negative keywords cannot fix in Performance Max.

Why negative keywords matter more in PMax than anywhere else

In a Search campaign, your keywords are a fence. You chose them, you chose their match types, and even broad match starts from a seed you picked. Negatives trim the edges of a field you defined.

Performance Max has no fence. There is no keyword targeting to constrain matching - you hand Google assets, a feed, audience signals, and optionally some search themes, and the system decides which queries, placements, and audiences to spend on across Search, Shopping, YouTube, Display, Discover, and Gmail. Audience signals and search themes are suggestions. Negative keywords are the only query-level instruction PMax treats as a hard rule.

That makes negatives structurally more important in PMax, not less:

• They are your only query-side brake. Everything else you give PMax is advisory. A negative keyword is binding.
• The matching is wider by design. PMax exists to find demand you did not enumerate. Sometimes that is incremental gold; sometimes it is “free download crack” queries against your paid product. Without negatives, both get bought.
• The blast radius is bigger. A junk theme in one Search ad group wastes one ad group’s budget. A junk theme in PMax leaks across a whole campaign’s budget, and blended ROAS hides it - a strong Shopping day papers over a bad Search-inventory day inside the same campaign.

The scale of the neglect is measurable. PaidSync’s audit of 2,000+ accounts found 87% had insufficient negative keyword coverage - and that is mostly Search campaigns, where negatives have been a first-class feature for two decades. PMax accounts, where the controls are barely a year old at full strength, are almost universally under-negated.

One more reason this matters now: the controls only recently became real. Google shipped native PMax search-term visibility in 2025, raised the negative cap from 100 to 10,000 in March 2025, and finished rolling out shared-list support on August 7, 2025. The pattern is now industry standard - Microsoft Advertising shipped its own PMax-style transparency and controls in May 2026. If you last checked “can PMax do negatives?” in 2023 and concluded no, your information is stale in the most expensive way.

How to add negative keywords to Performance Max, step by step

There are three levels, and they stack. A query is blocked if any level excludes it.

1. Campaign-level negative keywords

The workhorse. Available to everyone since March 2025, no Google rep required.

1. In Google Ads, select your Performance Max campaign.
2. Open Settings for that campaign and find the Negative keywords section. (Google moves furniture regularly - as of mid-2026 it lives in campaign settings; if it is not there, search “negative keywords” in the top search bar.)
3. Add your negatives, one per line, choosing a match type: exact [term], phrase "term", or broad term.
4. Save. The cap is 10,000 per campaign - roughly 100× more room than the old ceiling, which is to say: the cap is no longer your problem. Discipline is.

The same operation is available through the Google Ads API and Google Ads Editor, which matters once your lists get long - pasting 400 terms through the UI is nobody’s idea of a workflow.

2. Shared negative keyword lists

Since August 7, 2025, the shared lists you already use for Search campaigns attach to PMax too.

1. Go to Tools → Shared library → Exclusion lists (negative keyword lists).
2. Create a list - for example, “Job seekers” or “Freebie hunters” - and add terms to it.
3. From the list (or from the campaign), apply the list to your Performance Max campaigns.

Lists are the right tool the moment the same exclusion applies to more than one campaign. Fix the list once, and every attached campaign - Search and PMax alike - inherits the fix. As of mid-2026 the limits are 5,000 terms per list and 20 lists per account.

If you do not want to build lists from scratch, we maintain a free library of negative keyword lists organized by category, in English and Hebrew, free to copy or download. More on how to use pre-built lists without hurting yourself below.

3. Account-level negative keywords

The blanket layer. In Admin → Account settings → Negative keywords, you can add up to 1,000 terms that automatically apply to all Search, Shopping, and Performance Max campaigns in the account.

This is where “never, under any circumstances” terms belong: competitor brands you have decided never to bid on, adult terms, “free crack download,” categories that are illegal for you to serve. The bar for entry should be high precisely because the reach is total - an account-level negative silently applies to every future campaign too, including ones built by a colleague who has never seen your exclusion logic.

What to add first

An empty negatives section and a 10,000-term ceiling is a lot of blank canvas. Here is the priority order we would argue for.

First, decide the brand question - deliberately

Should PMax be allowed to serve on your own brand name? This is the most consequential single decision, and honest people disagree, so here are both sides.

The case for excluding your brand from PMax. PMax gravitates toward brand queries because they convert at the highest rate for the lowest cost - which makes the campaign’s reported ROAS look brilliant while it quietly buys traffic you would have gotten anyway. The overlap is not hypothetical: Optmyzr’s study of 503 accounts found query overlap between Search and PMax campaigns in 91.45% of them. We see the same pattern in accounts on our own platform - including cases where a great-looking PMax campaign turned out to be roughly 90% brand demand, with the “AI-found” incremental traffic being a rounding error. If you run a dedicated brand Search campaign (you should), letting PMax also serve on brand means competing against yourself in the auction and losing attribution clarity in the report.

The case against excluding it. If you have no brand Search campaign, excluding brand from PMax hands your own brand’s impression share to competitors camping on your name. Some accounts also see total conversions dip after exclusion, because PMax was harvesting genuine brand-adjacent demand - long-tail brand-plus-product queries a rigid brand campaign misses. And exclusion mid-flight disturbs the campaign’s learning; expect a turbulent week or two before judging results.

Our honest position: measure first, then decide. This is exactly why Keyword Ninja’s Performance Max suite labels the brand-overlap share of your PMax traffic rather than auto-excluding it - the verdict “your PMax is 72% brand” is a fact; what to do about it depends on whether a brand campaign exists to catch that demand. If you do decide to exclude, note that PMax has a purpose-built brand exclusions feature (brand lists) that handles misspellings and variants for you and does not consume your 10,000 negative-keyword slots. Use brand exclusions for brand; save negatives for everything else.

Second, block the universal junk patterns

Certain query patterns are waste for almost every advertiser, and they are the highest-confidence negatives you will ever add:

• Job seekers: jobs, careers, hiring, salary, internship, “how to become a…”
• Freebie hunters: free, crack, torrent, “free download,” coupon (careful if you actually run promotions)
• DIY and informational intent: how to, tutorial, DIY, template, example, meaning, definition
• Research-only intent: reviews, complaints, vs, alternatives (careful - if you sell comparisons, these are your bread)
• Wrong-audience qualifiers: used, second hand, cheap, wholesale - whichever ones contradict your actual offer

Every “careful” above is the point: there is no such thing as a universally safe list. “Free” is a lethal query for a premium product and a golden one for a freemium product. Which is why pasting a 1,500-term list you found on the internet directly into a live campaign is a gamble, not a strategy.

Third, add your category negatives from evidence

The junk that is specific to your business - the adjacent-but-wrong product categories, the homonyms, the b2c queries against your b2b offer - cannot come from a template. It comes from your own search terms report, which brings us to the loop.

Building your lists efficiently: the triage loop

The sustainable way to build PMax negatives is a short, recurring review - not a heroic one-time purge.

The weekly loop, about 15 minutes:

1. Open the PMax search terms report. Google surfaces it natively now (see our full guide to finding and reading PMax search terms). Set the window to the last 30 days.
2. Sort by cost, descending. Waste worth acting on is waste that costs money. A junk term with two impressions is noise; a junk theme with ₪400 of spend and zero conversions is a leak.
3. Judge themes, not single terms. If “salary,” “jobs,” and “hiring” each appear across a dozen queries, the negative you want is the word, added as a phrase-match negative - not twelve exact-match terms. This is n-gram thinking, and it is the difference between a 200-term list that blocks 90% of junk and a 4,000-term list that blocks the same 90%.
4. Add at the right level. Campaign-specific junk → campaign negatives. Junk that applies to several campaigns → a shared list. “Never, anywhere” → account level.
5. Recheck next week. New junk themes appear as PMax explores; the loop catches them while they are cheap.

Two shortcuts we built, described honestly:

The free library. Our negative keyword lists give you curated starting lists by category - job seekers, freebie hunters, DIY, and so on, in English and Hebrew. They are free, no signup. They are also generic by definition, so treat them as a checklist to react to, not a payload to paste blind.

The Smart Blocklist cross-check. Inside Keyword Ninja, the Smart Blocklist takes that curated catalog and cross-checks it against your account’s actual search terms and keywords - so instead of “here are 800 terms someone thinks are junk,” you see “these 23 catalog terms actually matched traffic in your account, here is what each cost, block the ones that fit.” You dismiss whole categories that do not apply to your business, and every block is reversible from the change log. That is the honest division of labor: the library is free and generic; the cross-check is the paid part because it is the part that touches your data. It is available on the PRO plan ($149/month) - the negative keyword tool page shows how it fits the rest of the workflow.

Limits and gotchas: what negatives cannot fix in PMax

This section is the one most guides skip, and it is where budgets go to die.

Negative keywords only apply to Search and Shopping inventory. This is the big one. A PMax negative keyword - at any level - constrains which queries trigger your ads. It does nothing about YouTube, Display, Discover, or Gmail placements, because those impressions are not query-driven. If your waste is a mobile game showing your ad to seven-year-olds, no negative keyword will ever fix it; you need account-level placement exclusions and content suitability settings.

The placement report will not tell you what junk placements cost. Google’s PMax placement reporting is impressions-only - by design, there are no clicks, cost, or conversions per placement, for anyone, through any tool. Keyword Ninja flags junk placements by pattern (mobile-game apps, anonymous placeholders, kids’ content, made-for-advertising-style domains) and we say plainly that the flag is based on impression volume and pattern, not on a cost figure nobody has.

Match types behave like Search negatives - verify anyway. As of mid-2026, PMax negative match types follow standard negative semantics: exact blocks only that query, phrase blocks queries containing the phrase in order, broad blocks queries containing all the words in any order. Critically, negatives do not expand to close variants - blocking “freebie” does not block “freebies” or “frebie.” You must cover plurals and common misspellings yourself. Google has iterated on PMax matching more than once, so the honest advice is: after adding a batch, watch your search terms report for a week and confirm the blocked theme actually disappeared.

Landing-page drift is a settings problem, not a negatives problem. If PMax sends traffic to pages you never chose, that is Final URL expansion doing its job; fix it with URL exclusions or by turning the expansion setting off, not by chasing queries.

The search terms report lags and hides low-volume terms. Google’s privacy thresholds mean some of your spend maps to terms you will never see, and new terms can take days to surface. Negatives you add today are typically enforced within hours, but verifying them takes about a week of report data. Budget your patience accordingly.

Do not carpet-bomb a learning campaign. Dumping 5,000 negatives into a PMax campaign in one afternoon can constrict matching hard enough to destabilize delivery. Add in reviewed batches - the weekly loop above naturally paces you - and let the campaign re-settle between rounds.

FAQ

How many negative keywords does Performance Max allow?

Up to 10,000 campaign-level negative keywords per PMax campaign, since March 2025 (the previous cap was 100, and originally you needed a Google rep to add any at all). On top of that: shared negative keyword lists (as of mid-2026, up to 5,000 terms per list and 20 lists per account) attachable to PMax since August 7, 2025, and up to 1,000 account-level negative keywords that apply to PMax automatically.

Do negative keywords work on PMax Shopping and feed traffic?

Yes. PMax negatives apply to Search and Shopping inventory - a negated query stops triggering both your text results and your product listings within the campaign. They do not apply to YouTube, Display, Discover, or Gmail placements, which are not query-driven; use placement exclusions and content suitability settings for those.

Should I use account-level or campaign-level negatives?

Both, for different jobs. Account-level (1,000 cap) is for exclusions that are true for your entire business, forever - they silently apply to every current and future Search, Shopping, and PMax campaign. Campaign-level (10,000 cap) is for exclusions specific to one campaign’s job. Shared lists sit in the middle: reusable category lists you attach wherever they apply. When in doubt, start at campaign level - it is the easiest to reverse without side effects.

How fast do PMax negative keywords take effect?

Enforcement typically begins within hours of saving. Give it 24-48 hours before drawing conclusions, and remember the search terms report itself lags by days - so full verification that a junk theme is gone takes about a week. Blocked queries stop spending long before they stop appearing in trailing-window reports.

Is there a difference between PMax negative keywords and brand exclusions?

Yes, and it matters. Brand exclusions are a separate PMax feature built specifically for blocking brand traffic - Google maintains the variant and misspelling coverage for each brand entity, and brand lists do not consume your 10,000 negative-keyword slots. If your goal is “keep PMax off my brand,” use brand exclusions; use negative keywords for everything else.

Put a number on it first

Before building lists, it is worth knowing how much PMax waste you actually have - the answer changes how much of this guide you need today. Our free Google Ads audit scans your account, PMax included, and shows the zero-conversion spend and junk themes it finds; it takes about two minutes and does not change anything in your account. If the number is ugly, the Performance Max suite gives you the verdicts - brand overlap, channel waste, junk patterns - and the negative keyword tools let you act on them, one click per block, every block reversible. And if you want the full picture of where budgets leak beyond PMax, start with our guide to finding and eliminating wasted ad spend.

The 10,000 cap ended the era when “PMax can’t do negatives” was true. What is left is the part no cap can fix: somebody has to look.