Negative Keywords in Google Ads: Build the Right List

A B2B account we looked at last year was spending roughly a third of its search budget on the word "free" (illustrative figure, but the pattern is real). "Free CRM," "free template," "free trial software." Every click cost money. None of those searchers had a budget. The fix took an afternoon: a negative keyword list, applied across the account, and the cost per qualified lead dropped because the same money started reaching people who could actually buy.

Negative keywords are the searches you pay Google not to show your ads on. Most accounts treat them as an afterthought, something you add when you happen to notice a bad click. That backwards order is exactly why budgets leak. This guide walks through how to build a negative keyword list deliberately, where to apply it, and how to keep it working as your campaigns grow.

If you are still setting things up, it helps to have your campaign skeleton in place first. Our B2B PPC guide covers how the pieces fit together before you start filtering traffic.

What negative keywords actually do

A normal keyword tells Google "show my ad for searches like this." A negative keyword does the opposite: "never show my ad when the search includes this word." The two work together. You bid on the searches that signal intent, and you block the ones that signal a dead end.

The payoff is not just saved money, though that is the obvious part. Blocking irrelevant searches also tightens your click-through rate and your relevance signals, which feeds Quality Score and can lower what you pay per click over time. A cleaner audience also gives your bidding algorithm cleaner data to learn from. Junk clicks teach the machine the wrong lesson.

Here is the trap. Without negatives, broad and phrase match keywords pull in adjacent searches you never intended. Bid on "project management software" and you can end up paying for "project management software jobs," "project management certification," and "what is project management." A student, a job seeker, and a curious browser. None of them will fill out your demo form.

The categories of searches worth blocking

Before you write a single negative, it helps to know what you are hunting for. Most wasted spend in B2B falls into a handful of buckets.

Freebie and DIY seekers. Words like free, cheap, template, open source, how to build, DIY. These people want to do it themselves or pay nothing. Fine audiences for your blog, wrong audiences for a paid search ad.

Job and career searches. Jobs, careers, salary, resume, internship, hiring. In B2B this is one of the largest sources of waste, because your product category and your job titles share vocabulary. Someone searching "salesforce admin salary" is not buying software.

Research and education intent. What is, meaning, definition, examples, tutorial, course, certification, pdf. These searchers want to learn, not buy. Some will become customers eventually, but not from a bottom-funnel ad today.

Wrong product or wrong fit. If you sell enterprise software, words like personal, home, for students, or a competitor's unrelated product line can pull the wrong crowd. If you only serve one country, location terms for places you do not cover belong here too.

Adjacent industries that borrow your terms. "Pipeline" means one thing to a sales team and another to an oil company. "Conversion" means something different to a religious organization. Watch for your keywords doing double duty in a field you do not serve.

A short table to keep these straight:

Category	Example triggers	Why block it
Freebie / DIY	free, cheap, template, open source	No budget to spend
Jobs / careers	jobs, salary, resume, hiring	Not a buyer
Research	what is, definition, tutorial, pdf	Learning, not buying
Wrong fit	personal, home, for students	Outside your market
Adjacent industry	terms shared with other sectors	Right word, wrong audience

How to build the list, step by step

You build a negative keyword list in two passes. The first is proactive, done before launch from what you already know. The second is reactive, done continuously from real search data. Both matter, and skipping the second is where most accounts fall apart.

Pass one: the pre-launch list

Sit down with what you know about your business and write out the obvious blocks. Start with the universal B2B negatives almost every account needs (free, jobs, salary, definition, and so on). Then add the ones specific to you.

Think through who searches your terms but cannot buy. Students. Job seekers. People in countries you do not ship to. Buyers of the product line you discontinued. Competitors comparing features (you may want to keep some of these, more on that below). Write down the words that describe each group.

Pull ideas from your own keyword research, too. When you do keyword research for PPC properly, you naturally spot the variants that look related but signal the wrong intent. Those rejected terms are your first negatives. If you want a deeper method for separating buying searches from browsing ones, the way we approach Google Ads for B2B lays out how intent should drive every keyword decision.

A reasonable pre-launch list for a B2B software company might run 50 to 150 terms. Do not aim for completeness here. You will never predict every junk search. The point is to catch the obvious waste before it happens.

Pass two: the search terms report

This is the engine of a good negative list, and it never stops running. Google records the actual searches that triggered your ads, not just the keywords you bid on. That report is gold.

Open the Search Terms report (under the Insights and reports section, or inside any campaign's keyword view). Sort by cost or by impressions. Read down the list. You will see real human searches, and some will make you wince. For each one that is clearly irrelevant, add it as a negative.

A practical rhythm: review search terms weekly for new campaigns, then every two to four weeks once things stabilize. New campaigns surface junk fast, so the first few weeks deserve closer attention. As you go, you are doing two jobs at once: adding bad terms as negatives, and promoting good terms you had not thought to bid on into your keyword list.

One honest caveat. Google has narrowed how much search term data it shows, hiding low-volume queries for privacy. You will not see every search. That makes the proactive pre-launch list more important than it used to be, because the report alone will not catch everything.

Match types for negatives work differently

This trips up almost everyone, because negative match types do not behave like positive ones. The key difference: negative keywords do not match close variants. No plurals, no misspellings, no synonyms. If you block "consultant" you are not blocking "consultants." You have to think in exact terms.

Negative broad match (just type the words: free trial) blocks any search that contains all those words, in any order, with other words around them. "Free trial," "trial for free software," "is there a free trial." This is the default and usually what you want.

Negative phrase match ("free trial") blocks searches containing that exact phrase in that order. "Best free trial tools" is blocked, but "free 30 day trial" is not, because the words are split.

Negative exact match ([free trial]) blocks only that precise search, nothing more. Use it rarely, when a single specific query is the problem and you do not want to risk blocking related valuable searches.

A common mistake: adding a single broad negative that is too aggressive. Block the word account to stop "account jobs," and you also kill "open a new account software," which might be exactly your buyer. When a word does double duty, block the phrase, not the single word. Precision protects you here.

Where to apply negatives: lists, campaigns, ad groups

Negatives can live at three levels, and choosing the right one keeps your account manageable.

At the account level (via shared negative keyword lists), you block terms across everything at once. This is where universal junk goes: jobs, free, your competitors' brand names if you do not bid on them, anything you never want to pay for anywhere. Build one or two master lists and apply them to every campaign.

At the campaign level, you block terms relevant to that campaign's goal. A campaign for your enterprise tier might negative-match "small business" and "startup" to keep its budget focused.

At the ad group level, you do something subtler: you steer traffic between your own ad groups. If you have separate ad groups for "crm software" and "crm integration," you add "integration" as a negative in the first group so those searches land in the right ad, with the right copy and landing page. This is called negative keyword sculpting, and it sharpens relevance without blocking the searcher.

Here is a quick reference:

Common mistakes that undo your work

Blocking too much. Aggressive negatives starve your campaigns. If volume drops off a cliff after you add a batch, check whether one of them was broader than you meant. Add negatives one consideration at a time and watch impressions.

Forgetting Performance Max and Display. Negative keyword lists do not automatically cover Performance Max campaigns the way they cover Search. Application has historically required extra steps and sometimes account-rep involvement. If you run Search alongside the Display Network, remember that placements and content there behave differently from keyword matching; our breakdown of Search versus Display explains why the same negative does not always travel cleanly between them.

Never revisiting the list. Search behavior shifts. New competitors launch, new slang appears, your own product line changes. A negative list built once and abandoned slowly drifts out of date. Put a recurring reminder on the calendar.

Conflicting negatives. It is possible to add a negative that blocks a keyword you are actively bidding on. Google flags these conflicts in the Recommendations and diagnostics area. Check it occasionally so you are not paying for a keyword that can never serve.

Frequently asked questions

How many negative keywords should I have?

There is no target number. A young account might run 50 to 100, a mature one several thousand across shared lists. Volume is a byproduct of disciplined review, not a goal. Adding negatives just to hit a number is how you end up blocking real buyers.

Do negative keywords lower my cost per click?

Indirectly, yes. They do not change your bid, but by cutting irrelevant impressions and clicks they improve click-through rate and ad relevance, which feed Quality Score. A better Quality Score can earn you a lower cost per click and a better ad position for the same money.

Can I use one negative list across multiple accounts?

Shared negative keyword lists work within a single Google Ads account and apply across its campaigns. They do not span separate accounts. If you manage several accounts under a manager account, you rebuild or import the list in each one.

Will negative keywords block Performance Max traffic?

Not by default. Standard negative lists were built for Search. Applying negatives to Performance Max has required extra setup and at times account-rep support, and the controls keep changing, so check the current Google Ads documentation before you assume a list is doing its job there.

Should I add my competitors' names as negatives?

It depends on your strategy. If you are not bidding on competitor terms and do not want to pay for those searches, block them. If you run a deliberate competitor-conquesting campaign, you keep them as positive keywords in that campaign and may block them everywhere else. Decide intentionally, do not leave it to chance.

How often should I review the search terms report?

Weekly for the first month of any new campaign, then every two to four weeks once performance settles. High-spend campaigns deserve the closer cadence. The faster you catch a new junk pattern, the less budget it drains.

A short checklist before you call it done

• You have a pre-launch list covering the universal blocks (free, jobs, salary, definitions) plus the ones specific to your business.
• A shared negative list is applied at the account level for universal junk.
• You review the search terms report on a set schedule, not when you happen to remember.
• Your match types are deliberate: broad for most, phrase when a word does double duty, exact only for one-off problems.
• You have checked for negatives that conflict with keywords you actually bid on.
• You know whether your Performance Max and Display traffic is actually covered.

Negative keywords are the least glamorous part of a paid search account and one of the highest-return. The work is unglamorous because it is mostly reading search terms and saying no. But every junk click you block is budget that reaches someone who can sign a contract.

If your account is spending and you are not sure how much of it lands on the wrong searches, that is worth knowing before next month's budget. We are happy to run a focused review of your search terms and waste, and show you where the money is leaking, with no obligation to work with us afterward. Start with your own search terms report this week, and bring the worst offenders.