Negative keywords in Google Ads block searches you don’t want to pay for. They’re the cheapest and fastest way to cut wasted spend in almost any account. In most of the accounts we audit, nobody has touched the list in months.
So before you touch a bid strategy or rewrite an ad, look here first. A neglected negative keyword list is usually where the money is leaking.
Key takeaways
- Negative keywords tell Google which searches to skip, and they’re usually the fastest fix. In most audited accounts, they can reclaim 10 to 20% of wasted Search spend.
- Unlike regular keywords, negatives don’t match close variants. You have to add plurals, misspellings, and synonyms yourself.
- In March 2025, Google raised Performance Max’s negative keyword cap from 100 to 10,000. That’s per campaign, so you can finally control PMax like Search.
- Broad blocks a whole theme, phrase blocks a context, and exact removes one query. The right match type matters more than the size of your list.
- The Search Terms report is the only reliable place to find negatives worth adding. Sort it by cost and filter to zero conversions.
What are negative keywords in Google Ads?
Negative keywords are exclusion terms that keep your ads out of searches you don’t want. They work backwards from normal keywords.
A regular keyword tells Google what to match. A negative keyword tells Google what to ignore. Add “free” as a negative, and your ad stops competing on searches with that word.
Here’s the part that trips people up. Negative keywords don’t behave like the keywords you bid on.
When you bid on a keyword, Google expands it to close variants. Those include plurals, misspellings, and words it thinks mean the same thing. Negatives don’t do that.
Add “plumber” as a negative, and Google still shows your ad on “plumbers” and “plumbr.” You have to add the plural and the common typos yourself.
That single quirk explains a lot of “but I already blocked that” confusion. Know it before you build a single list.
Why negative keywords matter more in 2026
The short version: the pool of searches your ads can match has gotten much bigger. So the odds of paying for junk went up. Three things pushed it there:
- Broad match is now the default pairing with Smart Bidding, Google’s automated bidding.
- Close variant matching keeps widening what counts as a match.
- 25.11% of Google searches now trigger an AI Overview, according to 2026 research from Conductor.
Each change adds queries to the auctions you sit in. Plenty of those queries were never a fit.
The cost of ignoring this is real money. We and other agencies see the same pattern in the accounts we audit.
Unmanaged negative lists tend to waste 15 to 30% of non-brand Search and Shopping spend. That money goes straight to searches that never convert.
And a wasted click isn’t as cheap as it used to be. Costs per click on competitive non-brand terms have climbed year over year. So the same irrelevant click drains more budget than it did two years ago.
That’s a service business paying for “plumbing jobs” and a store paying for “free” shoppers. It happens month after month, on autopilot.
Broad, phrase, or exact: which negative match type should you use?
Pick the match type by how wide the block should be:
- Broad match negatives take out a whole theme.
- Phrase match negatives take out a context.
- Exact match negatives remove one precise query.
Most wasted spend we find isn’t from missing negatives. It’s from the wrong match type on the ones already there.
Scroll sideways to read the full table.
| Match type | What it blocks | Best for | Where it fails |
|---|---|---|---|
| Broad | Any search containing all your words, in any order | Whole categories you never want, like “jobs” or “DIY” | Overblocks when a word has mixed intent (e.g. “free”) |
| Phrase | Searches containing the phrase, with words allowed around it | A specific unwanted context you want gone | Synonyms Google treats as close variants can slip past |
| Exact | Only the exact query, in the exact order | Surgical removal of one query | Misses every variation of the same intent |
The classic mistake is throwing in one word as a broad negative and walking away. Add “free” as a broad negative, and you block all of these at once:
- “free trial”
- “free consultation”
- “free quote”
- “toll-free”
Picture a home services company that runs a “free estimate” offer. That one negative can wall off some of its best searches.
Our rule: use broad only for words that are never relevant to you. Switch to phrase or exact once a word could appear in a search you want.
Where do you add negative keywords?
You can add negatives at three levels, from narrowest to widest. The level sets how far the block reaches and how much upkeep it creates.
Ad group and campaign negatives are quick to apply but stay where you added them. Shared lists hold the real payoff. They’re also where most accounts leave money on the table.
- Ad group level: best for stopping one ad group from stealing another’s traffic.
- Campaign level: best when an exclusion fits a whole campaign but not the account. A brand campaign might block competitor names here.
- Account level, through shared lists: best for universal blocks.
Here’s the ad group case in practice. One group targets “crm software” and another targets “free crm.” The paid group holds “free” as a negative, so the right ad serves.
For the account level, build one shared list of job-seeker, free-intent, DIY, and competitor terms. Attach it to every relevant Search and Shopping campaign. New campaigns then inherit it at launch instead of bleeding money until someone notices.
A couple of limits are worth knowing:
- Account-level negatives cap at 1,000 keywords.
- A shared negative keyword list officially holds up to 5,000. Through 2025, some advertisers reported lists accepting more without errors.
You won’t hit those ceilings on a small account. But they shape how you organize a big one.
How do you find negative keywords worth adding?
The answer is one report: the Search Terms report. It shows the actual searches that triggered your ads, not the keywords you bid on.
It’s the only honest source for what to block. Everything else is a guess: the keyword planner, a hunch, or last quarter’s list. None of them shows the queries your account actually serves.
Sort the report by cost
- Open a campaign and click Insights and reports, then Search Terms.
- Sort by cost, highest first.
- Filter to zero conversions over the last 30 to 90 days.
Now you’re looking at the searches spending money and returning nothing. A few will be queries you want to keep working on. The rest are your negatives.
One caveat: Google rolls up low-volume searches under “Other.” That bucket has hidden 20 to 30% of queries since 2020.
So you never see the full picture. But clean the visible queries, and the “Other” bucket usually shrinks along with them.
A hypothetical plumbing campaign
Here’s how that plays out. Say a Tampa plumbing company runs a Search campaign at $4,000 a month. Our audits for home services clients turn up the same leaks again and again.
Pull the report and sort by cost. You’ll often find spend piling up on searches like these:
- “plumber salary” and “plumbing jobs near me”: people who want to work there
- “how to fix a leaky faucet”: a DIY homeowner who will never call
- “plumber Orlando”: 85 miles outside the service area
None of those is a customer. Here’s how to block each pattern:
- Add broad “jobs” and “salary” negatives for the employment searches.
- Add phrase negatives like “how to fix” for the DIY pattern.
- Add the out-of-area cities.
On a real cleanup, catching a handful of patterns like these routinely frees up budget. That money can move back toward searches that actually book work. Often it funds better Google Ads management instead of window shoppers.
A starter negative keyword list you can steal
Most guides tell you to build a list, then leave the contents to you. Here’s an actual starting point.
We load these categories into a shared list before a new Search campaign goes live. That way the account isn’t leaking during its learning phase. Adjust for your business, but this covers the usual suspects.
- Employment: jobs, careers, salary, hiring, employment, internship, resume, “near me jobs”
- Free and cheap (for premium or paid offers): free, cheap, discount, coupon, wholesale, bootleg, secondhand
- DIY and education: how to, tutorial, DIY, guide, “do it yourself,” instructions, youtube
- Research and comparison (until you’re ready to bid on it): reddit, forum, meaning, definition, examples
- Competitor names: your direct competitors’ brand terms, unless you’re running a deliberate conquest campaign
- Home services extras: out-of-area cities and counties, “warranty,” “repair manual,” “parts,” indeed, ziprecruiter
Add the employment and DIY buckets as broad negatives. Those words are never a fit. If you run any free offer, add “free” and “cheap” as phrase or exact.
That way you won’t accidentally block “free estimate.” This list is a floor, not a ceiling. The Search Terms report is where you build on it every week.
Negative keywords in Performance Max: what actually changed
Performance Max used to be a black box. For a long time, you could add only 100 negative keywords per campaign. That’s changed.
In January 2025, Google rolled out campaign-level negatives for PMax. In March 2025, the cap rose to 10,000 per campaign (Google Ads Help). That matches the Search limit.
You can now hold PMax to the same query discipline as a Search campaign. But only if you actually use the room.
Most PMax accounts don’t. In our audits, pre-2025 campaigns still act as if the 100-keyword cap were law. That leaves a real leak open.
The most important PMax negative to set is a brand exclusion. It stops PMax from absorbing your own branded searches and inflating its reported return.
Keep in mind that negatives only apply to Search and Shopping inventory. They won’t stop your ads on YouTube, Display, Gmail, or Google Discover. So PMax will always have placements that keyword negatives can’t touch.
Common mistakes we see in every audit
The failures repeat across industries and account sizes. Each one is fixable in an afternoon.
Our take: the problem is rarely that a team doesn’t know the answer. It’s that nobody has had the hour to do the work.
No shared list at launch
A new campaign goes live with no baseline negatives. The first 60 days leak on jobs, free, and competitor searches. Fix: build the starter list above and attach it before launch.
Broad match that overblocks
A broad “free” negative quietly kills “free consultation” and “free quote.”
Did conversions drop 20% right after a negative change? An overreaching broad negative is almost always the cause. Fix: demote it to phrase or exact.
Stale negatives nobody revisits
A 2023 negative meant to stop a launch-week spike is still in place. It’s blocking searches that would convert today. Fix: sweep your highest-impression negatives every quarter.
PMax left uncontrolled
The manager assumes negatives aren’t available. So PMax eats brand traffic and reports a rosier return than the real one. Fix: use the campaign-level list, now allowed up to 10,000 entries.
Get a second set of eyes on your account
Has nobody reviewed your negative keywords in the last 90 days? Then your account is almost certainly paying for searches that won’t become customers.
Start with the Search Terms report. The starter list above can stop the obvious leaks today.
Would you rather have someone run the full cleanup and keep it clean? That’s exactly the work our PPC team does. The goal is spend that reaches customers, not job seekers or DIY researchers.
That work pairs closely with the home services marketing accounts we manage across the country.
Want to see what your account is leaking? Get in touch with Ardoz Digital and we’ll take a look.
Wondering what you should spend in the first place? Our guide on how much Google Ads cost in 2026 is a good companion read.