Negative Keywords for Professional Service Google Ads: Stopping Wasted Spend from Tyre-Kickers and Job Seekers

Open any professional service Google Ads account that's never had a proper negative keyword list built, and the search terms report tells an ugly story. That budget was meant to buy phone calls and booked consults — instead a decent chunk of it bought clicks from a Year 11 student researching "how much do lawyers earn," someone's ex-colleague looking for "[firm name] careers," and a person three suburbs outside your service area hoping for a free template. None of these people were ever going to become clients, and none of them should have cost you a cent. The fix isn't smarter bidding or a bigger budget 💖 — it's an hour spent on the boring, unglamorous list-building most agencies skip because it doesn't look impressive in a pitch deck.

What most professional service accounts get wrong

Negative keywords are treated as an afterthought, not a foundation — and it shows up directly in wasted spend.

• Trusting Smart Bidding to sort it out — Google's algorithms are good at finding people who click, not people who become paying clients. Left alone, they'll happily keep spending on "free" and "jobs" searches because those searches generate clicks, and clicks look like signal.
• Only adding negatives after noticing the waste — most firms build their list reactively, months in, after thousands of dollars have already gone to searches that were obviously never going to convert.
• Building the list at ad group level, not campaign level — so every new campaign launches with zero protection and repeats the same mistakes from scratch.
• Setting it and forgetting it — new junk terms appear every month as search behaviour shifts. A list that isn't reviewed goes stale within a quarter.

The starter negative keyword list

Copy this into a new campaign-level negative keyword list before your next campaign goes live. Fill in the brackets with your profession, service and competitors, then add to it as your own search terms report reveals more:

What this waste actually looks like

How to actually set this up

Build the list once, at account or campaign level, so it applies automatically to everything you run — not buried inside a single ad group where the next campaign won't inherit it. In Google Ads, create a Negative Keyword List under Tools & Settings, add your terms, then apply it to every active and future campaign. Use phrase match for most entries (blocks "family lawyer jobs Gold Coast" without needing every permutation) and exact match for short, high-risk single words like "free" or "jobs" where you want tighter control. Pull the search terms report weekly for the first month of a new campaign, then monthly after that — new junk terms creep in as seasons, news events and search trends shift, so a list built once in January won't catch what shows up in July.

Mistakes to avoid

• Copying a generic list off a blog and never customising it — your firm name, your competitors and your actual service area need to be added manually.
• Adding negatives at the wrong match type — a broad match negative on a common word can silently block searches you actually wanted.
• Never reviewing the search terms report again — the list needs topping up every month, not once at launch.
• Applying the same list to every service line without checking for overlap — a term that's junk for a conveyancing campaign might be a genuine lead for a wills and estates campaign.

Frequently asked questions

How much budget will a negative keyword list actually save me?

It depends entirely on how neglected your account currently is. Firms that have never touched negatives typically find 20-40% of spend going to obviously irrelevant searches; accounts that are already reasonably managed might only find 5-10%. The only way to know your number is to pull your own search terms report.

Will negative keywords fix a campaign that isn't generating leads?

Not on their own — this is the honest limit. Negative keywords stop money leaking to people who were never going to convert, but they won't fix weak ad copy, a slow landing page, bad targeting, or an offer that doesn't match what searchers actually want. Think of it as removing waste, not adding performance.

How often should I review the negative keyword list?

Weekly for the first month of any new campaign, then monthly ongoing. Search behaviour shifts with seasons and news cycles, so a list that isn't revisited will slowly go stale.

Can I add too many negative keywords?

Yes. Overly broad negatives — especially broad match on common words — can quietly block legitimate searches alongside the junk. Check your Search Lost Impression Share after adding a batch of negatives, and lean towards phrase or exact match when a term could plausibly appear in a real lead's search.

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