How to Hire a Google Ads Agency Without Getting Burned
Most local service business owners who’ve been through a bad agency experience say the same thing: the warning signs were there on the first call. They just didn’t know what to look for.
This guide gives you the exact questions to ask, the red flags that should end the conversation, and what a real performance guarantee looks like — versus the kind agencies use to close deals and disappear.
If you’re currently spending $2k–$13k/month on Google Ads and wondering whether your results are good or bad, this is where you start. You can also check our Google Ads for Home & Local Services authority guide for benchmarks specific to your trade.
10 Questions to Ask Before You Sign Anything
These aren’t gotcha questions. They’re the baseline any competent agency should answer without hesitation. If you get vague answers, that’s your answer.
- What’s your average cost per lead in my vertical? For home services, the industry average is $66.02 per lead according to LocaliQ Home Services Advertising Benchmarks. A good agency should beat that — or explain specifically why your market is different.
- How do you define success for my account? If the answer is clicks, impressions, or CTR — leave. Success is cost per acquired customer and revenue generated, period.
- How often will my account be actively optimized? Google’s own optimization best practices state that active campaigns should be reviewed at least once per week. Monthly check-ins are not management.
- Do you set up call tracking on day one? If they don’t track inbound calls to the ad that generated them, they cannot tell you what’s working.
- Are you a certified Google Partner? Google Partners must meet performance requirements and maintain a $10,000/90-day spend threshold. It’s not everything, but it’s a minimum bar.
- What’s your negative keyword strategy? A well-structured account blocks irrelevant searches from day one. Ask how many negatives they add in the first 30 days.
- Who actually manages my account — the salesperson or someone else? Account churn at agencies is real. Know whose hands are on your budget.
- What does your onboarding look like and when will I see the first leads? Expect 30 days to launch, 60–90 days to optimize. Anyone promising leads in week one is overselling.
- What happens if results don’t hit the benchmarks we agreed on? The answer to this question separates performance agencies from everyone else.
- Can I see a sample report from a current client? Reports should show cost per lead, conversion volume, and revenue impact — not pie charts of impression share.
7 Red Flags That Should End the Conversation
These aren’t minor concerns. Each one is a pattern that costs business owners real money.
1. They lead with clicks and impressions. Clicks don’t pay your lease. If the pitch deck is full of traffic metrics and light on cost-per-lead data, that agency optimizes for what’s easy to show — not what grows your revenue.
2. No call tracking setup. For local service businesses — HVAC, plumbing, chiro, dental — the phone is where revenue happens. An agency that doesn’t track calls to the specific keyword and ad that triggered them cannot tell you what’s working. Full stop.
3. Zero negative keyword strategy. Running Google Ads without negatives is like leaving the front door open and hoping the right customers walk in. A competent agency adds hundreds of negatives before a campaign goes live and refines weekly. Ask them to show you a negative keyword list from a current account.
4. Lock-in contracts longer than 90 days. A 12-month contract with no performance clause protects the agency, not you. A confident agency offers 90-day terms with clear exit conditions if benchmarks aren’t hit.
5. They manage your account inside their own MCC — not yours. If you don’t own your Google Ads account and the campaign data inside it, you own nothing. When you leave, your history, audiences, and conversion data go with them.
6. Reporting arrives once a month. Your ad spend is active every single day. Monthly reporting means problems compound for 30 days before anyone notices. Weekly optimization is the minimum standard per Google’s own best practices documentation.
7. No vertical-specific experience. HVAC campaigns don’t run like gym campaigns. Chiro doesn’t run like dental. Seasonal demand, average job value, and lead-to-close rates are different in every vertical. An agency that manages everyone the same way understands none of them. See which verticals we actually specialize in at our Who We Serve — Verticals & Results page.
| Topic | Green Flag Answer | Red Flag Answer |
|---|---|---|
| Success metric | Cost per lead, cost per acquisition, ROAS | Clicks, impressions, CTR |
| Call tracking | Set up on day one, tracked to keyword level | “We use Google’s built-in tracking” |
| Negative keywords | Hundreds loaded pre-launch, refined weekly | Added “as needed” |
| Contract length | 90 days, performance-linked exit clause | 12-month lock-in, no out |
| Account ownership | You own the account, always | Account lives in agency’s MCC |
| Reporting cadence | Weekly optimization + monthly revenue review | Monthly PDF with traffic charts |
| Vertical experience | Named clients, specific CPL benchmarks by trade | “We work with all industries” |
What a Real Performance Guarantee Looks Like — vs. Marketing Promises
Every agency claims to get results. Almost none of them put anything on the line if they don’t.
A real performance guarantee has four components: a defined metric (cost per lead or ROAS), a specific number (not “we’ll improve your results”), a time window (90 days is fair), and a consequence (refund, free month, or contract exit). If any of those four are missing, it’s not a guarantee — it’s a talking point.
Here’s what to watch for. Phrases like “we’re committed to your success” and “we’ll work until it’s right” are not guarantees. They have no teeth. Ask directly: “If we don’t hit X cost per lead in 90 days, what happens?” The answer will tell you everything about how confident they are in their own work.
At Simply Digital Marketing, our HVAC clients run at $47 CPL. Chiropractic clients at $38 per patient. Gyms at 4.2x ROAS. Those are the benchmarks we work toward — and the basis of how we structure accountability. If we can’t show you what the number should be before we start, we shouldn’t be managing your budget.
Also worth noting: only about 1 in 10 Google Ads accounts is managed by a certified Google Partner agency. Most small business ad budgets are being managed without any verified third-party accountability. A badge isn’t a guarantee — but it’s a signal the agency is being measured by someone other than themselves.
How to Evaluate the First 90 Days
The first 30 days should be infrastructure: campaign builds, conversion tracking verified, call tracking live, negative keyword lists loaded, landing pages reviewed. If you’re two weeks in and still waiting on campaign access, that’s a problem.
Days 31–60 are about data. You need enough conversion volume to make optimization decisions — typically 30+ conversions to give the algorithm meaningful signal. Ask for a week-over-week cost-per-lead report, not monthly snapshots. You should see the trend moving in a direction.
Days 61–90 is where performance becomes measurable. By this point, your agency should be able to show you: your actual CPL versus the benchmark they committed to, which campaigns and keywords are driving qualified leads versus wasting spend, and what the next 90-day optimization plan looks like.
If you don’t have that data at day 90, you don’t have a performance agency — you have a vendor running your card every month.
For context: the average Google Ads conversion rate across all industries is 7.26%. If your account is well below that after 90 days and your agency isn’t escalating with a plan to fix it, that’s not a performance agency — it’s a holding pattern.
The Hire Decision Comes Down to One Question
Can they tell you, before you sign, what your cost per acquired customer should be — and what they’ll do if they miss it?
That’s it. Everything else — the pitch deck, the case studies, the Google Partner badge — is secondary to that one answer. An agency that knows your vertical, owns a real benchmark, and ties accountability to it is worth hiring. Everyone else is selling you marketing.
If you’re evaluating agencies right now or trying to figure out whether your current spend is performing, book a Revenue Decision Review — a free 30-minute session where we audit your current ad spend, compare your numbers against real vertical benchmarks, and show you exactly what good looks like for your business. No pitch. Just the math.