June 9, 2026·7 min read·Nikola Teofilović

Negative Keywords in Google Ads: The Fastest Way to Cut Wasted Spend

Learn how to build a negative keyword list in Google Ads and cut 20–40% of wasted budget in your first month without losing real customers.

Negative keywords are the most underrated element in any Google Ads campaign. Most beginners ignore them — they set up a keyword list, raise the budget, and wait for customers. What they get instead are clicks from people who are not their audience at all: "free", "jobs", "wikipedia", "how to do it yourself". Every one of those clicks burns budget with zero chance of converting.

A properly built negative keyword list can save you 20–40% of your budget in the first month — with the same number of real customers. That is the difference between a campaign that bleeds money and one that actually delivers.

What Are Negative Keywords (and How They Work)

A negative keyword is a word or phrase that tells Google: do not show my ad when someone types this. If you sell professional air conditioning service and add "free" as a negative, your ad will not appear for searches like "free AC service" or "how to fix air conditioning yourself for free".

Without a negative keyword list, Google will interpret your keywords broadly. You bid on "AC service"? Google will show your ad for everything from "AC service Belgrade jobs" to "wikipedia AC service".

How to Find Negative Keywords in 30 Minutes

Step 1: Search Terms Report

In your Google Ads dashboard, go to Keywords → Search terms. You will see a list of every real search query that triggered your ad over the past 30 days. This is pure gold. Filter by "Clicks > 0" and sort by clicks descending.

Now go through the list and flag everything that is not your customer. For AC service, if you see "AC Belgrade jobs", "split AC unit installation cost free", or "AC recycling" — all of those are negative candidates.

Step 2: Universal Negatives Everyone Needs

Some words belong on your negative list regardless of industry:

Free, gratis, no cost
DIY, do it yourself, how to do it myself
Jobs, employment, salary, job listing
Wikipedia, definition, what is
Course, training, certification, school (unless you sell education)
Images, photos, video (if you sell a product, not content)
Used, second hand, pre-owned (if you sell new)
Forum, reddit, quiz

Step 3: Industry-Specific Negatives

This depends on your niche. Brainstorm every way someone might search for your keyword without being your customer. Examples:

Dentist: 'dentist movie', 'tooth dream meaning', 'emergency dentist' (if you don't offer out-of-hours)
Plumber: 'plumber joke', 'plumbing license exam', 'plumbing company invoices'
Hair salon: 'hair salon price list' if you sell premium service, 'hair salon for sale'
Auto repair: 'auto repair facebook', 'auto repair job listing', 'wiki auto repair'

Match Types — Where Mistakes Happen

Negative keywords can be broad, phrase, or exact match — just like regular keywords. Understanding the difference saves money:

Negative Broad Match (word only, no quotes)

free — blocks searches where the word "free" appears anywhere in the query, in any order. The widest filter. Use it for words you are certain you never want.

Negative Phrase Match (in quotes)

"AC free" — blocks searches where these two words appear in that order (other words can come before or after). Useful for combinations that are only problematic in context.

Negative Exact Match (in brackets)

[AC free] — blocks only that exact query. The narrowest filter. Rarely used for negatives; mostly relevant for regular keywords.

Practical tip: 80% of your negatives should be phrase match. Broad match is sometimes too wide and blocks valid clicks; exact match is too narrow and lets variants through.

Negative Keyword Lists — Do the Work Once

Google Ads lets you create a negative keyword list and attach it to multiple campaigns. In practice: create a list called "Universal Negatives" with all generic terms (free, jobs, wiki, etc.) and apply it to all your campaigns. For each individual campaign, you then only add the negatives specific to that service.

This saves hours when launching new campaigns and ensures no campaign ever misses the basic filters.

How Often to Review

Open the Search Terms Report at least once a week during the first three months after launch. After that, once every two to four weeks is enough. New negatives always appear — seasonal variations, competitors launching new products, viral moments (something becomes a meme and people start searching for it in unexpected ways).

What NOT to Do

Do not block your main industry keyword as a negative — it sounds obvious, but it happens by mistake more often than you think
Do not block competitor brand names if you actually want to capture their potential customers (that is a separate strategic choice)
Do not add negatives without reviewing the Search Terms Report first — you will be guessing in the dark
Do not add 500 negatives at once — work in batches and monitor the effect before adding more

Negative keywords are not glamorous, but they are the fastest budget saving available in Google Ads. One hour per week on this list can save 20–40% of your spend and actually increase conversions because you are eliminating irrelevant clicks. The next biggest lever is improving your Quality Score — often cutting your cost per click in half for the same ad position.

See how we manage Google Ads campaigns →