Negative Keywords: Stop Paying for the Wrong Trades Clicks

What a negative keyword actually does

When you run Google Ads, you choose the keywords you want to show up for, like furnace repair or roof replacement. Google then matches your ads to a range of searches it considers related, and that range is often wider than you expect. A negative keyword is the opposite instruction. It tells Google which searches you never want your ad to appear on, so you stop paying for clicks that were never going to turn into a job.

This matters for a trades business because every click costs real money. Most of your budget should reach people who need work done at their home or property, inside your service area, fairly soon. Negative keywords keep your ad budget pointed at those people.

The searches trades businesses pay for by mistake

Each trade attracts its own kind of wasted clicks, but the patterns repeat. These are the categories worth checking first:

• Job seekers: searches with jobs, hiring, salary, apprenticeship or careers. Someone looking for a plumbing apprenticeship in Calgary is not booking a drain cleaning.
• Do it yourself: how to, DIY, tutorial, video or youtube. A homeowner learning to swap a furnace filter usually wants instructions, not a technician.
• Training and licensing: course, school, certification or exam, such as an apprentice electrician studying for a journeyman ticket.
• Parts and supplies: parts, wholesale, supply store, or specific product names when you only sell installed work.
• Work you do not offer: commercial or industrial terms if you only do residential, or towns outside the area you actually drive to.
• Bargain hunters: free, cheap or used, when those words do not match how you price your work.

None of these people are bad to reach in general. They are just not customers for a paid ad whose only job is to book work.

Why this hits trades ads harder than most

Trades keywords tend to be expensive because the jobs are valuable and the competition is local and direct. A roofer in Alberta after a hailstorm, or an HVAC company during a cold snap, is bidding against every other shop in town for the same handful of searches. When clicks cost that much, a few irrelevant ones each day add up fast. They also muddy your numbers. If a big share of your clicks come from job seekers, your conversion rate looks worse than it really is, and you might shut off a campaign that was actually working.

Automated bidding strategies learn from who clicks and who converts. Feeding them cleaner traffic gives the system better signals, which is another reason to trim irrelevant searches early instead of waiting a few months.

How to find and add negative keywords

The best source is your own account. In Google Ads, the search terms report shows the actual phrases people typed before they clicked your ad. Review it regularly, and more often while a campaign is new. Anything that clearly could not become a paying job is a candidate for a negative keyword.

Pick the right match type

Negative keywords have match types, and they behave a little differently from regular keywords. Negative broad match blocks searches that contain all of your negative words, in any order. Negative phrase match blocks searches containing those words in that exact order. Negative exact match blocks only that exact search. Negatives also do not automatically cover plurals or misspellings, so you may need to add both job and jobs.

If you run several campaigns, for example one for furnace repair and one for air conditioner installs, a shared negative keyword list lets you apply the same exclusions everywhere without retyping them in each campaign.

Mistakes to avoid

The most common mistake is going too far. Adding cost or price as a negative can block homeowners who are actively shopping for a new roof or water heater and simply want a ballpark before they call. Blocking a nearby town can cut off customers you would happily drive to. Before adding a negative, ask whether anyone typing that phrase could reasonably hire you.

The other mistake is setting negatives once and forgetting about them. Search behaviour shifts with the seasons, with new services you add, and with new competitors in your market, so the list needs regular upkeep. If you would rather hand that off, our team handles search term reviews and negative keyword management as part of /services/ad-management, along with bidding, budgets and conversion tracking.

Make sure the clicks you keep can convert

Cleaning up who clicks is only half the job. The people you do pay for still land on your website, and if that page is slow, unclear or hard to call from on a phone, good traffic leaks away too. A tidy ad account paired with a weak site still loses jobs to the shop down the road.

Want to know if your website is ready for the clicks your ads are paying for? Run our free instant website audit at /audit and see what to fix before you spend another dollar on ads.