Negative keywords for local-service Google Ads campaigns

Contents (11 sections)

• What a negative keyword actually does
• The four questions before adding a negative
• Build the list in four layers of scope
• Classify before you exclude
• Negative match types
• A safe starter process
• Trade-specific starting points
• The collateral-damage check
• The change log
• The review cadence
• What to do next

Negative keywords protect the budget by preventing ads from serving on searches that do not represent the service you sell.

They are not a universal list of bad words. A word is negative only in relation to the offer, the campaign, the service area, the client, and the outcome you want.

“Rental” is irrelevant to a full-service junk-removal company and essential to a dumpster-rental business. “Commercial” is waste for a residential cleaner and revenue for a commercial janitorial company. “Cheap” may attract poor-fit price shoppers, or it may describe a service the business deliberately sells at a published entry price. “Installation” is wrong in a repair campaign and valuable in a replacement campaign.

• No universal list exists.Build negatives from your own search-terms report, adding one only when that search cannot become a client for that campaign's offer.
• Scope matters most.Place each negative at the narrowest level that works: account, service line, campaign, or ad group. The same term at the wrong level can cost more than it saves.
• Check before you save.Look for valuable searches that share the word, add variants one at a time, and log why each negative was added.

The goal is not to block as much traffic as possible. It is to block demand that conflicts with the business model while protecting searches that can become qualified, booked, finished, and economically sensible work.

What a negative keyword actually does

A negative keyword is a term you add to a campaign, ad group, or list so the ad is not eligible to show for searches that match it according to its match type.

Google says negative keywords help exclude search terms so campaigns can focus on the searches that matter to clients, and notes that they work differently from positive keywords: they do not automatically match close variants or other expansions.

That is a targeting control, not a judgment about the person searching. The same query can be worthless to one business and a perfect fit for the business next door.

The four questions before adding a negative

Before excluding a term, ask:

1. Does this search represent a service the business sells?
2. Does it fit the stated service area and operating capacity?
3. Could the wording be ambiguous, or valuable in another campaign?
4. Is this a negative-keyword problem at all, or does it need a new campaign, landing page, offer, or location setting?

If the answer is unclear, classify the search as ambiguous and gather more evidence. A negative added to an ambiguous term removes demand you have not yet understood, and you will not see what you lost.

Build the list in four layers of scope

Scope is the decision that matters most, and it is the one most often skipped. The same term at the wrong level can cost more than the clicks it saved.

Global or account level

Service-line list

Campaign level

Ad-group level

One-query exact negative

Global or account level. Reserve this for themes that should be excluded across every relevant campaign, typically employment, training, or product-shopping terms in a business that never offers those things. Google says account-level negative-keyword lists can apply across eligible Search and Shopping inventory in relevant campaign types. Global lists should be short and conservative. A global list is hard to justify when different service lines have different offers.

Service-line list. Use this when a term is wrong for one service and valid for another: installation in a repair campaign, residential in a commercial-only campaign, commercial in a residential-only campaign, emergency in scheduled maintenance, maintenance in a replacement-only campaign.

Campaign level. Use this for a campaign’s geography, offer, hours, or client type: a commercial cleaning campaign excluding residential intent, a scheduled plumbing campaign excluding urgent dispatch language, a city campaign excluding areas outside the operating boundary.

Ad-group level. Use this for narrow overlap and intent routing: excluding “replacement” from a repair ad group when a separate replacement group exists, or excluding “inspection” when inspection has its own landing page.

One-query exact negative. Use this for a specific expensive or clearly irrelevant query that should not recur.

Shared lists are useful because one edit affects several campaigns. That is also exactly why they carry risk. A mistaken shared negative removes legitimate demand everywhere it is applied. Check the scope before saving.

Classify before you exclude

Every candidate term gets one of four decisions, and only one of them is an exclusion.

Do not turn uncertainty into an exclusion automatically. “Observe” and “Route” are the two decisions that separate a maintained library from a list that quietly strangles the account.

The leakage categories worth reviewing

DIY and instructions. “How to,” “do it yourself,” “tutorial,” “diagram,” “steps.” Often valid exclusions when the business sells finished services rather than education, but keep them if the business also sells consultations, inspections, or instruction, and remember that a homeowner reading instructions is sometimes a homeowner deciding whether to hire a professional.

Employment, training, and careers. “Jobs,” “careers,” “salary,” “apprenticeship,” “hiring,” “training,” “certification,” “exam,” “school,” “resume.” Usually the strongest global candidates for a customer-acquisition campaign. Verify the business is not also advertising hiring or a certification programme, and if it recruits through Google Ads, keep recruitment in a separate campaign where client exclusions do not apply.

Parts, products, and supplies. “Parts,” “supplies,” “kit,” “manual,” “wholesale,” “used,” “for sale.” Good candidates for review, not automatic negatives. Some businesses sell parts, install customer-supplied materials, or capture service demand through a product-related search.

Free, cheap, and research intent. “Free,” “cheap,” “coupon,” “discount,” “what is,” “meaning,” “pictures.” A free-estimate offer may need “free.” A client asking what a termite inspection involves may request one next week. Use the actual offer and the booked-job record rather than assuming every price-sensitive search is worthless.

Wrong service or property type. A service the business does not provide: “pool repair” for a plumbing company, “carpet cleaning” for a window cleaner. Tie every wrong-service exclusion to a defined service catalogue.

Wrong geography. A search can carry excellent service intent and still sit outside the service area. Google says location matching uses multiple signals and is not perfectly accurate. Diagnose location leakage through actual client addresses, travel cost, capacity, and contribution, not by excluding a city because one lead was inconvenient.

Customer-type mismatch. Residential, commercial, landlord, tenant, property manager, or government terms when the campaign intentionally serves another client type. These belong at service-line or campaign level, almost never globally.

Emergency versus scheduled intent. “Now,” “tonight,” “24 hour,” “urgent,” “estimate,” “maintenance,” “next week.” These are usually routing decisions rather than exclusions. Use them to send intent to the right campaign instead of erasing a word from the account.

Competitor, brand, and support searches. Competitor names, login, invoice, warranty, and existing-customer support queries create activity without new-customer acquisition. Whether to exclude them is a deliberate business and policy decision, not a performance rule.

Negative match types

For Search campaigns, Google supports negative broad, phrase, and exact match. They do not behave like their positive counterparts.

Google notes that negative keywords do not automatically match close variants or other expansions, and that synonyms and singular or plural versions may need to be added separately. Casing and misspellings are handled automatically.

There is no “always use phrase” rule and no match type that is always best. Use the narrowest match type that solves the confirmed problem, then inspect what changed. Exact is marked as the safer starting point above because it is the most reversible mistake, not because it is always correct: a consistently wrong phrase family deserves a phrase negative.

A safe starter process

1. Start with the offer, not a word list

   Write three lists: services the business sells, searches that are not services, and searches that are valid only in another campaign or property type. Include accepted materials, property types, service areas, hours, and capacity wherever they affect eligibility.

2. Pull the actual search terms

   Google says the Search terms report shows the real terms people searched that triggered an ad, and can reveal terms related to what the business sells without matching it exactly. Add campaign, ad group, location, cost, clicks, conversions, and any available outcome field.

3. Read the whole query, not one word

   Classify service, location, client type, urgency, and intent from the full search. "Water heater replacement plumber" and "water heater parts near me" share three words and mean opposite things.

4. Check the business record before deciding

   Bring in the CRM, the call log, the booking record, and your one-page monthly report. Sort by spend when budget leakage is the immediate concern, but also review qualified leads and booked outcomes: a high-spend query can be a profitable job.

5. Decide keep, exclude, observe, or route

   Record the query, the spend, the clicks, the conversions, the booked outcome, the reason, the scope, the match type, the date, and the reviewer. An unexplained negative is unmaintainable six months later.

6. Add the smallest useful exclusion

   One wrong query gets an exact negative. A consistently wrong phrase family gets a phrase negative. A multi-word concept that always indicates a different offer may justify a broad negative. Add synonyms, singulars, and plurals only when the search-term record shows they are needed.

7. Check for collateral damage

   Review impressions, search terms, qualified leads, booked jobs, and any valuable query that vanished. Lower spend is not proof of better return.

8. Log the change and set a review date

   Record the before-and-after effect on relevant clicks, qualified leads, booked jobs, finished jobs, cost per booked job, and unknown outcomes. Then reconcile against the deeper outcome rather than the click count.

Google says search terms can be added as negative keywords to an ad group, a campaign, an existing negative-keyword list, or a new list, so the scope decision is made at the moment of adding, which is exactly when it is easiest to get wrong.

Trade-specific starting points

Every list below is a starting point for classification against your own search-terms report: a set of candidates to test, not a list to paste into an account. The offer decides. Each of these terms is excluded in some accounts and profitable in others, and the only evidence that settles it is your own.

Plumbing

A company offering commercial plumbing, emergency dispatch, drain cleaning, or water-heater work must not block those terms globally. Worked through query by query, the same account produces very different decisions.

HVAC

Do not globally exclude “repair,” “replacement,” “maintenance,” “commercial,” or “emergency” in a business that sells those services. Route them instead.

Roofing

“Inspection” is a lead product in some roofing businesses and a low-value research term in others. Review the actual booking and revenue record before excluding it.

Cleaning

Commercial and residential terms must not be globally excluded in a business that serves both. Airbnb, move-out, deep, and recurring cleaning are usually distinct offers rather than negatives.

Auto detailing

A mobile detailer wants “mobile.” A fixed-location shop may route or exclude it. The word alone does not decide the business value.

Landscaping and lawn care

Customer type and service catalogue determine the scope. A landscaping company often serves both residential and commercial clients and sells several adjacent services, which makes global exclusions especially expensive here.

The collateral-damage check

Before saving a negative, look for the valuable queries that share its words. This is the step that separates an exclusion from an amputation.

Ask whether the term appears in a real service query, in another service line, in an emergency query, in a scheduled query, or in a commercial or residential query the business serves. Then ask whether the selected match type blocks extra words, a different word order, or singular, plural, and synonym variants, and whether the exclusion sits at the narrowest sensible scope.

Google says negative keywords do not match close variants or other expansions, and that synonyms and singular or plural versions may need to be added separately. The opposite risk applies too: adding several variants at once can create a broader exclusion than intended. Test them one at a time.

After a meaningful exclusion, compare before and after.

A lower share of excluded spend is not automatically the target. Some accounts improve by finding high-cost leakage. Others improve more by separating a valid service line that had been mixed into one campaign. And if the only measurable result is lower spend, that is not an improvement. It is a question about what demand was removed.

Reverse or narrow an exclusion when it blocked a serviceable query, when another service line needs the term, when the campaign structure changed, when the business began offering the service, when the client type or service area changed, when a booked-job record shows the term is valuable, or when relevant demand measurably dropped.

The change log

A negative-keyword library is an operating record, not a one-time cleanup. It should be readable six months later by someone who did not add the terms.

For a single high-stakes exclusion, record more detail. Include the search term, the normalised theme, the service line, the campaign, and the ad group. Add the match type and why you chose it. Add the reason, the evidence source, and the date added. Add the owner and the review date. Note whether it is reversible. Record the collateral-damage check and the outcome after exclusion.

The review cadence

The right frequency depends on spend, volume, campaign changes, seasonality, and how quickly one irrelevant query can consume meaningful budget. A new or volatile campaign may need frequent review. A stable, low-volume campaign may need less. What matters is that each review produces a recorded decision.

The sweep itself is short. Pull the search terms report for a defined period. Sort by spend, outcome, or both. Classify each new query as keep, exclude, observe, or route. Add only confirmed exclusions at the narrowest useful scope. Record each negative with its match type, scope, reason, and date. Then check whether qualified demand or booked work fell.

Review location and call data alongside keyword data. A relevant search from an unserved location, an unanswered call, or an unavailable time slot is not a keyword problem, and a negative keyword will not fix it.

Your one-page monthly report

The numbers and the next step

Money out Advertising spend, recorded to the dollar With the search-term evidence beside it: queries kept, excluded, observed, or routed, each with a reason and a scope.

Measured outcomes Qualified leads, booked jobs, finished work, client-confirmed revenue, and estimated contribution at the stated margin Compared before and after each meaningful exclusion, so a saving can be distinguished from a loss.

Decision Continue, adjust, or stop A negative that lowers clicks but also removes booked jobs is not a win, and it should be reversed rather than defended.

The best negative-keyword library is not the longest one. It reflects the actual service catalogue, client types, locations, hours, capacity, and economics. A search term that looks expensive but produces profitable work is not a leak. I count conservatively: each call and form once, and nothing I cannot show.

What to do next

Negatives decay as search behavior shifts. The Search Terms Report guide shows the review cadence and the exact view that keeps the list current instead of historical.

Questions owners ask

What negative keywords should every local-service campaign use?

None should be applied blindly to every campaign. Start with the business's own service catalogue, then use search-term evidence to classify DIY, employment, product, wrong-service, wrong-location, and other mismatches. A universal list can block a service the business actually sells.

Should I add "cheap" as a negative?

Only if the business does not want that offer, or the search terms consistently produce poor-fit demand you can evidence. A legitimate low-price or entry-service offer may need "cheap" and "affordable" to stay eligible.

Should "commercial" be a negative for residential businesses?

It is usually a campaign-scope candidate when the business genuinely does not serve commercial customers. Do not put it on an account-wide list if another campaign sells commercial work, because a shared negative removes the demand everywhere it is applied.

What match type should I use?

Use the narrowest match type that addresses the confirmed query family. Exact is surgical, phrase blocks a sequence in order, and broad blocks when all the terms appear in any order. Google's negative matching differs from positive matching, and close variants, singulars, and plurals may need separate entries.

Do negative keywords block close variants?

Google says negative keywords do not automatically match close variants or other expansions, and that synonyms and singular or plural versions may need to be added separately. Casing and misspellings are handled automatically. Add variants only when the search-term record shows they are needed.

How often should I review search terms?

Match the cadence to spend, volume, seasonality, and how much the campaign is changing. New or high-spend campaigns need closer review than stable low-volume ones. What matters is that the review produces a recorded decision, not that it follows a universal calendar.

Can a negative keyword reduce good leads?

Yes. A broad or shared exclusion can block a valuable search, especially when a word is ambiguous or another campaign sells a related service. Review lost demand and booked outcomes after every significant change, and reverse the exclusion if a serviceable query disappeared.

Are negative keywords enough to stop wasted spend?

No. Offer mismatch, service area, campaign structure, landing-page relevance, call handling, capacity, and conversion tracking all affect return. Negative keywords are one control in the account, not a substitute for the others.

Should I exclude competitor names?

That depends on the brand strategy, the policy environment, legal review where relevant, and whether those searches produce valuable or unwanted outcomes. Do not add competitor names automatically as a performance rule.

When should I reverse a negative keyword?

Reverse or narrow it when it blocked a serviceable query, or when another service line needs the term. Also reverse it when the campaign structure changed, or when the business started offering the service. Do the same when the customer type or service area changed. A booked-job record showing the term is valuable is another reason to reverse it.