Negative Keywords for Plumbing Google Ads: The List That Stops Wasted Spend
You're paying for clicks from people searching "how to become a plumber" and "plumbing salary." Every one of those clicks costs you $15-40 and will never turn into a job.
Negative keywords for plumbing Google Ads are the fastest way to stop bleeding money on irrelevant searches. Most plumbing companies we audit are wasting 20-35% of their ad spend on searches that have zero chance of converting. That's not a rounding error. On a $3,000 monthly budget, you're looking at $600-1,050 going straight into Google's pocket instead of your bank account.
This guide gives you a complete plumber negative keyword list you can copy into your account today. No theory. Just the words and phrases that are draining your budget right now.
What Negative Keywords Actually Do (30-Second Explanation)
When you add a negative keyword, you're telling Google: "Never show my ad when someone includes this word in their search." Simple.
Someone searches "plumber near me" and you want that click. Someone searches "plumber jobs near me" and you absolutely don't. The word "jobs" is a negative keyword that stops you from paying for employment seekers.
Without negative keywords, Google's broad match and phrase match settings will show your ads to anyone remotely related to plumbing. Google makes money on clicks, not on whether those clicks make sense for your business.
The Real Cost of Skipping This Step
A plumbing company in Melbourne running $4,500/month in Google Ads discovered they'd paid for 847 clicks over six months from people searching for plumbing courses, plumber apprenticeships, and DIY plumbing tutorials. At an average CPC of $23, that's $19,481 in wasted spend.
Their cost per lead dropped 41% within 30 days of implementing a proper negative keyword list. No other changes to their campaigns.
The Complete Negative Keyword List for Plumbing Companies
Copy these into your Google Ads account at the campaign level. We've organised them by category so you can exclude keywords for plumbing PPC based on what makes sense for your specific business.
Employment and Career Searches
These are people looking for work, not plumbing services:
- jobs
- job
- career
- careers
- hiring
- employment
- salary
- salaries
- wage
- wages
- apprentice
- apprenticeship
- trainee
- traineeship
- how to become
- become a plumber
- plumber course
- plumbing course
- certification
- certificate
- licence requirements
- license requirements
- resume
- CV
- interview
- indeed
- seek
- glassdoor
DIY and Educational Searches
These people want to fix it themselves, not hire you:
- DIY
- how to
- tutorial
- tutorials
- guide
- instructions
- steps
- youtube
- video
- videos
- myself
- own
- self
- learn
- learning
- class
- classes
- training
- workshop
- book
- books
- ebook
- manual
Parts and Products (Unless You Sell Them)
People shopping for parts rarely need a plumber. Add these to your google ads negative plumbing list unless you run a retail operation:
- buy
- purchase
- order
- shop
- shopping
- store
- bunnings
- home depot
- amazon
- ebay
- for sale
- price list
- catalogue
- catalog
- wholesale
- supplier
- suppliers
- distributor
- manufacturer
Unrelated Plumbing Terms
The word "plumbing" appears in contexts that have nothing to do with your services:
- plumbing the depths
- plumb bob
- plumb line
- plumb crazy
- game
- games
- simulator
- software
- app
- mario
Free and Cheap Seekers
These searchers have already decided they won't pay market rates:
- free
- cheap
- cheapest
- discount
- budget
- low cost
- bargain
- deal
- deals
- coupon
- coupons
- promo code
- voucher
Note: Some plumbing companies successfully target "affordable" or "cheap" searches with specific landing pages. Test before you exclude these if you compete on price.
Other Locations
If you only serve Sydney, you need to exclude other cities. This is especially important if you're running broad match:
- [Every city you don't service]
- [Every suburb outside your service area]
- [Neighbouring states if you're near a border]
Commercial vs Residential Filtering
If you only do residential work, exclude:
- commercial
- industrial
- factory
- warehouse
- office building
- construction site
- contractor
- tender
- bid
If you only do commercial work, exclude:
- residential
- home
- house
- apartment
- unit
- flat
How to Add Negative Keywords to Your Google Ads Account
Getting these into your account takes about 10 minutes. Here's the process:
Campaign-Level Negatives
- Log into Google Ads
- Click on the campaign you want to edit
- Click "Keywords" in the left menu
- Click "Negative Keywords" tab at the top
- Click the blue plus button
- Select "Add negative keywords"
- Paste your list (one keyword per line)
- Save
Account-Level Negative Keyword Lists (Better Option)
Creating a negative keyword list lets you apply the same exclusions across all campaigns at once:
- Click "Tools & Settings" (wrench icon)
- Under "Shared Library" click "Negative keyword lists"
- Click the blue plus button to create a new list
- Name it something clear like "Master Plumbing Negatives"
- Paste your keywords
- Save the list
- Apply to all relevant campaigns
Account-level lists save time when you discover new negative keywords. Update once, applies everywhere.
Finding Your Own Wasted Spend: The Search Terms Report
The lists above catch the obvious waste. But your account has unique problems based on your location, services, and how Google interprets your keywords.
The Search Terms Report shows you exactly what people typed before clicking your ads. This is where you find the leaks specific to your business.
How to Run This Report
- Go to your Google Ads account
- Click "Keywords" in the left menu
- Click "Search terms" at the top
- Set the date range to the last 30-90 days
- Sort by "Cost" descending
You're looking for search terms that:
- Cost money but never converted
- Have nothing to do with hiring a plumber
- Target services you don't offer
- Target locations you don't serve
What to Do Weekly
Block 15 minutes every Monday morning to review your search terms report. This single habit will save you thousands over the course of a year.
Add any irrelevant terms to your negative keyword list immediately. Don't wait until you've "collected enough" to make changes. Every day that search term stays active is another day you're paying for garbage clicks.
This ongoing refinement is a core part of managing Google Ads for plumbers effectively. The initial list gets you 70% of the way there. The weekly reviews get you the rest.
Match Types for Negative Keywords
Negative keywords have their own match type rules, and they work differently than regular keywords.
Negative Broad Match (Default)
If you add "job" as a negative broad match, your ad won't show when someone searches "plumber job" or "plumbing job listings." But it WILL still show for "plumbing jobs" because the plural doesn't match.
Broad match negatives require all words to be present in the search. Word order doesn't matter.
Negative Phrase Match
Adding "plumber job" as phrase match (with quotes) means your ad won't show when those exact words appear in that exact order. "Plumber job near me" is blocked. "Job as plumber" is not.
Negative Exact Match
Adding [plumber jobs] as exact match only blocks that specific search. "Plumber jobs melbourne" would still show your ad.
Practical Recommendation
Use broad match for most of your negatives. It catches more irrelevant variations. Use phrase match when you need precision, like excluding specific multi-word queries that could have legitimate variations you want to keep.
Common Mistakes That Waste Your Negative Keyword Efforts
Even with a solid plumber negative keyword list, these errors can undermine your work:
Blocking Keywords That Actually Convert
Don't add "cost" or "price" as negatives. People searching "plumber cost" or "emergency plumber price" are often ready to hire. They want to know what they're getting into before they call.
Check conversion data before excluding any keyword that seems commercial in nature.
Forgetting Plurals and Variations
If you add "job" you also need "jobs." Google's negative broad match doesn't handle plurals the same way positive keywords do. Miss this and you're still paying for half the garbage clicks.
Not Updating for Seasonal Searches
Around trade school enrollment periods, you'll see spikes in "plumbing course" searches. Tax time brings "plumber tax deductions" searches. Stay alert to seasonal patterns in your search terms report.
Adding Negatives Without Checking Impact
Before adding a negative, search for it in your keywords tab. Make sure you're not accidentally blocking a keyword you're actually targeting. This happens more often than you'd think with broad match campaigns.
The 80/20 of Negative Keywords
You don't need a list of 500 negatives to see results. Focus on these high-impact categories first:
- Employment terms (jobs, career, salary, apprentice) typically account for 15-25% of wasted spend
- DIY terms (how to, DIY, tutorial) account for another 10-20%
- Wrong locations can be 5-15% depending on your geo-targeting setup
- Free/cheap seekers vary but often represent low-quality leads even when they convert
Get these four categories locked down and you've eliminated most of the problem. Then use your weekly search terms reviews to catch the rest.
Frequently Asked Questions
How many negative keywords should a plumbing Google Ads account have?
Most well-optimised plumbing accounts have between 100-300 negative keywords. Start with the core lists above (around 80-100 terms) and add 5-15 more each week based on your search terms report. There's no upper limit, but quality matters more than quantity. Focus on terms that actually appear in your search terms report rather than trying to predict every possible irrelevant search.
Can negative keywords hurt my campaign performance?
Yes, if you add the wrong ones. Blocking terms like "cost," "price," or "quote" will hurt you because those are commercial intent searches. Always check conversion data before adding negatives. If a search term has generated leads or calls in the past, don't block it just because it looks odd. Let the data guide your decisions.
Should I add negative keywords at the campaign level or ad group level?
Start at the campaign level for terms that are irrelevant across your entire business (like employment searches). Use ad group level negatives when you need to prevent overlap between ad groups. For example, if you have separate ad groups for "emergency plumber" and "plumber near me," you might use ad group negatives to keep them from competing. Account-level lists are best for universal exclusions.
How often should I review and update my negative keyword list?
Weekly reviews of your search terms report take 15-20 minutes and should be non-negotiable. The first month after launching campaigns, you might add 20-30 new negatives per week. After three months of active management, you'll typically add 3-5 per week. Never stop reviewing entirely. New irrelevant searches appear as Google's algorithms change and new trends emerge.
Do negative keywords work with Performance Max campaigns?
Google now allows account-level negative keywords to apply to Performance Max campaigns, but the implementation is limited. You can add negatives through your Google Ads rep or by contacting support. The control isn't as precise as with Search campaigns. If tight budget control matters to you, traditional Search campaigns with manual negative keyword management typically deliver better cost efficiency for plumbing businesses.
Stop Paying for Clicks That Will Never Convert
You now have a complete plumber negative keyword list and the process to keep it updated. Implementation takes an hour. The weekly maintenance takes 15 minutes.
The plumbing companies we work with typically see 20-40% reductions in cost per lead within 30 days of proper negative keyword implementation. That's money that goes back into clicks that actually generate calls.
If your Google Ads account hasn't been audited in the last six months, you're almost certainly paying for garbage clicks right now. We'll review your search terms report, identify the waste, and show you exactly where your budget is leaking.
Get your free Google Ads audit and find out how much of your spend is going to people who will never hire a plumber.