Google Ads Education

Negative Keywords — How to Stop Wasting Google Ads Budget on Bad Clicks

The single fastest way to recover wasted ad spend in any service business account without touching a bid.

📅 Updated May 2026 ⏱ 9 min read 🎯 Beginner to Intermediate
Quick Answer: Negative keywords are search terms you tell Google NOT to show your ads for. For a plumber, adding "DIY" and "how to" as negatives stops wasting budget on homeowners who want to fix it themselves. Most service business accounts waste 20 to 35% of budget on irrelevant clicks before a negative keyword audit.

Why Negative Keywords Are the #1 Budget Leak in Service Accounts

Google Ads broad and phrase match keywords are deliberately wide. That is by design — Google wants your ads to enter as many auctions as possible. The problem for service businesses is that many of those auctions are for people who will never buy.

27%
Average budget wasted on irrelevant clicks — service business accounts with no negative keyword list
Based on Ad Boost account audits, 2024–2026

A roofing company bidding on "roof repair" without negatives will show ads to people searching "how to repair a roof myself," "roofing supply wholesale," and "roofing jobs near me." None of those searchers are hiring a contractor. Every click from them is pure waste.

Negative keywords are the filter that fixes this. They cost nothing to add and start working immediately.

4 Categories of Negative Keywords for Service Businesses

🚧

DIY / Informational

  • how to
  • DIY
  • yourself
  • tutorial
  • guide
  • video
  • tips
💼

Job Seekers

  • jobs
  • hiring
  • career
  • salary
  • resume
  • apprentice
  • apply
🏭

Wholesale / Supply

  • wholesale
  • supply
  • materials
  • parts
  • distributor
  • manufacturer
🌍

Wrong Geography

  • [competing cities]
  • other states
  • national chains
  • far zip codes
  • out of area

Geography negatives are especially important for location-based service businesses. If you only serve Houston, adding Dallas, Austin, San Antonio, and other Texas city names as negatives prevents your ads from burning budget on out-of-area searches that Google's geo-targeting occasionally misses.

Negative Keyword Match Types Explained

Just like regular keywords, negative keywords have three match types — and choosing the wrong one is one of the most common mistakes we see in audits.

Match Type Syntax How It Works Best Used For
Broad diy Blocks any query containing all the words in any order, in any form Universal junk terms like "free", "cheap", "DIY" where all variations should be blocked
Phrase "how to" Blocks queries where the exact phrase appears in that order, with possible words around it Multi-word informational patterns like "how to", "can I", "what is"
Exact [plumbing jobs] Only blocks the exact query — nothing else Terms where only one specific query should be blocked without affecting related searches

Rule of thumb: Use broad negative for single junk words. Use phrase negative for informational patterns. Use exact negative sparingly, when you need surgical precision to avoid blocking good searches nearby.

Starter Negative Keyword List for Service Businesses

Add these before your campaign goes live. Review after 2 weeks and expand based on what shows up in the Search Terms Report.

DIY / Informational

how to diy yourself tutorial guide video tips what is definition meaning wikipedia

Job Seekers

jobs job hiring career careers salary wage resume apprentice internship apply now

Wholesale / Trade / Supply

wholesale supply supplies parts materials distributor manufacturer bulk trade price depot

Price Shoppers / Low Intent

free cheap cheapest discount coupon promo cost of price of average cost

How to Find Wasted Spend: The Search Terms Report in 3 Steps

The Search Terms Report shows exactly what people typed before clicking your ad. It is the most direct source of negative keyword intelligence in your entire account.

1

Access the Report

In Google Ads, go to Campaigns → select a campaign → Keywords → Search Terms. Set the date range to the last 30 to 90 days and download the full report to a spreadsheet.

2

Sort by Cost, Flag the Bad Ones

Sort by Spend descending. Scan each row and mark any query that is clearly irrelevant — job searches, informational queries, competitor brand names you are not intentionally targeting, or wrong service types. Calculate the total flagged spend.

3

Add as Negatives and Track the Savings

Select flagged rows and click "Add as negative keyword" — or collect them in a list and upload to your shared negative list. Note the monthly wasted spend figure. That amount should shift to productive clicks within the next billing cycle.

Negative Keyword Lists vs Campaign-Level Negatives

Google Ads gives you two places to add negative keywords. Knowing which to use prevents you from doing the same work twice across every campaign you manage.

Shared Negative Lists

  • Apply to multiple campaigns at once
  • Update once, updates everywhere
  • Best for universal junk terms (DIY, jobs, free)
  • Can be reused across client accounts
  • Found under Tools → Shared Library

Campaign-Level Negatives

  • Only apply to one campaign
  • Best for campaign-specific exclusions
  • Useful when one service type should not cross-trigger another
  • More surgical control per campaign
  • Updated directly inside each campaign

Best practice: Maintain a shared list for universal exclusions and supplement with campaign-level negatives for anything specific to that service or geography. This two-layer approach scales cleanly as accounts grow.

Frequently Asked Questions

Negative keywords are search terms you add to your Google Ads campaign to prevent your ads from showing for those queries. They stop irrelevant clicks from consuming your budget and improve the overall quality of your traffic.
Most service business accounts benefit from 50 to 200 negative keywords at the campaign level before launch, growing to several hundred after the first Search Terms Report review. There is no upper limit — more precise targeting generally improves performance and lowers cost per lead.
Yes, if you add too-broad negative keywords that accidentally block relevant searches. For example, adding the word "service" as a broad negative could block queries like "plumbing service near me." Always use phrase or exact match for negatives when in doubt, and check the Recommendations tab after adding a large batch.
For new campaigns, review weekly for the first month to catch wasted spend early. For established campaigns, monthly reviews are usually sufficient unless your budget is high or CTR is dropping unexpectedly. High-spend accounts should check weekly as a routine practice.
A shared negative keyword list in Google Ads lets you maintain one set of negative terms and apply them to multiple campaigns simultaneously. This saves time and ensures consistent exclusions across your entire account. You manage shared lists under Tools and Settings, then Shared Library.
Yes, positively. By excluding irrelevant searches, your ads show to more qualified audiences, which typically improves click-through rate and landing page relevance — both components of Quality Score. A cleaner account tends to get better Quality Scores over time as irrelevant traffic is removed.

Find Out How Much You Are Wasting Right Now

Our free Google Ads audit analyzes your Search Terms Report and identifies every dollar going to irrelevant clicks.

Get Your Free Audit