Negative Keywords in PPC: Why They Protect Your Budget

Negative keywords are search terms you tell Google Ads not to show your ads for. For a business running search campaigns on a limited budget, they’re the fastest lever against wasted spend, because an irrelevant click costs exactly the same as a relevant one.

This guide explains what negatives do, where wasted spend usually hides, how to build a list that protects the budget without blocking real customers, and the mistakes that most often undo the work.

Google’s help pages linked here were read on 14 September 2026. Google changes them without notice, so check the linked page before relying on a detail.

At a glance

• They stop the auction

  A matching negative keeps your ad out of that search.

• Three match types

  Negative broad, phrase and exact each block differently.

• No close variants

  Negatives don’t catch plurals, misspellings or synonyms; add them yourself.

• Three levels

  Shared lists, campaign negatives and ad group negatives.

• Weekly review

  The search terms report is where the waste shows.

On this page8 sections

What negative keywords do, and what they don’t

A negative keyword stops your ad from entering the auction when the search matches it. Negatives have their own match types:

• Negative broad match blocks any search containing all the words, in any order.
• Negative phrase match blocks searches containing the words in that order.
• Negative exact match blocks only that precise search.

The important limitation is that negatives don’t expand. Unlike positive keywords, they don’t catch close variants such as synonyms, misspellings or plurals. If you want to block “jobs”, “job” and “careers”, you add all three.

Where the wasted spend hides

The search terms report shows the actual searches that triggered your ads. For most business accounts, the waste falls into a handful of recognisable groups:

• Job seekers: jobs, careers, vacancies, salary, apprenticeship, recruitment.
• Do-it-yourself intent: free, template, tutorial, how to, course, DIY.
• Research rather than purchase: what is, definition, examples, wiki, reddit, reviews of competitors.
• The wrong product or the wrong customer: a service business receiving searches for a physical product of the same name, or consumer searches for a business-only service.
• The wrong place: towns and countries you don’t serve, when location targeting alone hasn’t caught them.

Building the list

Work at three levels:

• A shared negative keyword list applied to every campaign holds the terms that are never relevant to the business, such as job-seeker and free-download terms.
• Campaign-level negatives hold terms that are wrong for that campaign’s offer but might be right elsewhere.
• Ad group-level negatives stop ad groups competing with each other, so that a search for the exact product name reaches the exact-match ad group rather than a broad one. Google explains how it chooses between keywords in its page on keyword prioritisation.

Shared lists are worth setting up on day one; they’re the part of the account that keeps paying for itself.

A short weekly routine

1. Open the search terms report for the last seven days.

   Sort by cost.

2. Read every term that spent money without converting.

   Add negatives for the ones that are genuinely irrelevant, at the right level.

3. Then do the opposite.

   Sort by conversions and look for terms that convert but aren’t yet keywords, and add them.

4. Check for conflicts.

   Make sure no new negative blocks one of your own keywords.

In our experience, over a few months this is the routine that most improves a search account, and it’s the one most often skipped.

The mistakes that quietly block your own customers

• Negative broad on a core word. Adding “account” as a negative broad to block “account jobs” also blocks “suspended account help”. Use phrase or exact for anything close to your own keywords.
• Blocking your own brand variants because they looked like a competitor’s.
• Negatives that conflict with keywords. A negative that matches one of your own keywords stops it showing. Check for conflicts after every bulk upload.
• Adding negatives from a single day’s data. One odd search isn’t a pattern. Wait for repetition before blocking a term that might be legitimate.

Why cleaner traffic also protects the account

There’s a compliance benefit that’s easy to miss. When your ads only appear for searches your landing page genuinely answers, the ad, the search and the page stay closely matched. Google’s policies come down hard on the opposite: its Misrepresentation policy doesn’t allow promising products, services or promotional offers in the ad that are unavailable or aren’t easily found from the destination, and its Unacceptable Business Practices policy, enforced without warning, covers offering products or services that you don’t have or can’t deliver.

A well-maintained negative list won’t make a site compliant on its own, but it keeps your ads in front of the people your page was built for.

Frequently asked questions

What are negative keywords in Google Ads?

Search terms you tell Google Ads not to show your ads for. When a search matches a negative keyword, your ad doesn’t enter that auction.

Do negative keywords block plurals and misspellings?

No. Unlike positive keywords, negatives don’t match close variants, so add plurals, misspellings and synonyms yourself.

Which match type should I use for negatives?

Negative broad blocks any search containing all the words in any order, negative phrase blocks the words in that order, and negative exact blocks only that search. Use phrase or exact for anything close to your own keywords, so you don’t block real customers.

How often should I add negative keywords?

Weekly is a good rhythm: read the search terms report for the last seven days, sorted by cost, and add negatives for terms that are genuinely irrelevant. Wait for a term to repeat before blocking it.

What is a shared negative keyword list?

A list of negatives you can apply to several campaigns at once, for terms that are never relevant to the business, such as job-seeker or free-download searches.