B2B Google Ads Agency: What It Costs, How To Vet One, When To Walk Away

What a B2B Google Ads agency should do for a service business

A B2B Google Ads agency builds and runs search campaigns that turn buyer searches into qualified sales conversations. For a B2B service firm, that means calls with decision makers. Not form fills. Not traffic.

This page is for consultancies, IT and managed service providers, professional services, manufacturers and agencies hiring outside help. If you sell software, read our SaaS PPC agency page. If you want to run Google Ads yourself, read Google Ads for B2B.

Why B2B service firms need a different agency than ecommerce:

• Tiny search volumes. "Fractional CFO for manufacturers" might get a few hundred searches a month. Every wasted click hurts.
• Junk intent everywhere. Job seekers, students, people looking for free templates, competitors doing research.
• Long gaps between click and revenue. InterTeam Marketing's agency guide points out that ecommerce and local accounts close in one session. Yours closes months later.
• The sale happens on a call. So the conversion that matters is a held, qualified call, sent back to Google from your CRM.

An agency that has only run ecommerce accounts will optimize your account toward cheap form fills. It will look great in the report. And your sales team will hate it.

B2B Google Ads agency pricing: what management fees really cost

Agency fees fall into four models. Here are the published ranges we could source, and who published them:

Swydo's guide also publishes a sliding percentage table (20% to 30% under $5K of spend, down to 10% to 15% above $50K) but doesn't name a source for it. Treat it as directional.

None of these are B2B-only numbers. B2B accounts are usually smaller in spend and heavier in strategy, so expect the upper half of each range.

And remember: the fee is the small number. The ad spend it steers is the big one. A cheap agency that wastes 30% of a $15,000 budget costs you $4,500 a month before you pay it a cent.

Percentage of spend vs flat fee: the crossover formula

Neither model is better. One is cheaper at your spend level. Here's how to find out which.

Crossover spend = flat fee / percentage rate

Illustrative: a $3,000 flat fee vs a 15% fee. $3,000 / 0.15 = $20,000. Below $20,000 a month in ad spend, the percentage is cheaper. Above it, the flat fee wins.

Then check the incentive. A percentage fee pays the agency MORE when you spend more, whether or not it works. A flat fee pays the same whether they work hard or coast.

Total first-year cost = setup fee + (monthly fee x 12) + ad spend

Illustrative: $2,000 setup + ($3,500 x 12) + ($10,000 x 12) = $164,000. Divide by the held, qualified calls you expect. That's your real cost per call. If the agency can't talk in those terms, that tells you something.

For how fees compare across lead generation models, see lead generation pricing.

Agency minimums and contract terms

Most serious B2B agencies have a floor. Know it before the first call.

InterTeam Marketing's list of B2B Google Ads agencies shows how wide the minimums run. Note: InterTeam publishes the list and ranks itself first.

Directive's own B2B Google Ads page says it sizes budget from pipeline goals, conversion rates, close rates and expected CPC rather than a fixed minimum. Visionary Marketing's page says most B2B companies see meaningful results with £3K to £10K a month in ad spend, and offers month-to-month terms. Agencies' own claims, worth confirming in the contract.

Contract terms to insist on:

• Month-to-month after a 60 to 90 day ramp, or a clear exit clause.
• YOU own the Google Ads account, the conversion setup, the audiences and the data.
• A written scope: what's included, what's extra, how fees change if spend changes.
• Reporting on held and qualified calls, not just clicks and cost per lead.

How to vet a B2B Google Ads agency: the scorecard

Score every agency on the same five things. InterTeam's evaluation weights are a sensible start, and we've translated each into what to look for:

Then make them prove it in a live account. InterTeam suggests asking agencies to demonstrate these before you sign:

1. How do CRM stage changes in HubSpot or Salesforce get sent back to Google Ads?
2. Show me a recent search term review and your negative keyword list.
3. How does sales feedback on lead quality change targeting?
4. Which campaigns created opportunities, in pipeline dollars?
5. How do you test landing pages, and how are tests tied to conversions?

Add two of ours: "Who will actually run my account, and how many accounts do they run?" and "What happens to my account if we part ways?"

Our full checklist for any outside provider is in how to vet a provider.

Red flags: when to walk away from a PPC agency

SaaS Hero's pricing guide lists Stackmatix's four warning signs: refusing to itemize scope, using minimum spend as a qualifier, long contract minimums with no performance clause, and proprietary dashboards that block data export. Add these:

1. They own your ad account. SaaS Hero flags agencies that won't say whether they own the accounts, pixels and audience lists. If you can't take it with you, walk.
2. Guaranteed leads before they've seen your account. SaaS Hero calls out performance deals with guaranteed lead volume or cost per lead before account access.
3. No definition of a qualified lead. Then "leads" can mean anything.
4. Reports in clicks and impressions only. InterTeam flags reporting limited to clicks, impressions or CPL instead of pipeline.
5. No offline conversion tracking. Bidding to form fills finds form fillers.
6. No questions about your sales process. An agency that doesn't ask your close rate can't know what a click is worth.
7. Hourly billing with no cap for ongoing work.
8. The senior person sells, the junior person runs it. Ask who touches the account weekly.

Any one of these is a question. Three is an answer.

What a good B2B PPC agency delivers in the first 90 days

Visionary Marketing's FAQ sets similar expectations: initial data in 2 to 4 weeks, meaningful pipeline in 6 to 8 weeks, closed-deal data in 3 to 6 months. That's one agency's view, but it's a fair yardstick.

If month three looks exactly like month one with a nicer report, that's your answer.

Agency, freelancer, in-house or a full booking system?

Here's the uncomfortable truth for B2B service firms. Google Ads alone rarely fills a calendar. Search volume is small, so Google catches demand but doesn't create it.

That's why the strongest setups pair Google with Meta: Meta creates demand, Google captures it, and one funnel qualifies both. More on that in Facebook ads for B2B.

Where insaneX fits

We're not a Google-only agency, and we won't pretend to be. If all you need is search campaign management, use the scorecard above and hire a specialist.

What we build is the whole booking machine: "We'll Build You A B2B Booking Machine That Lands 5-7 Qualified Sales Calls On Your Calendar Every Single Day."

• A cold traffic offer, and Meta and Google ads to carry it.
• A 7-question quiz funnel (about 30 seconds) with the calendar inside it.
• CRM, email and SMS follow-up, plus a VSL that pre-sells before the call.
• Held and qualified calls reported separately. Built and live in 14 days.

Across our clients: $54.3M+ revenue generated, 85+ SaaS and B2B brands scaled, $7M+ in ad spend tested and optimized at a 9x average ROAS. Past results, not a guarantee.

Pre-revenue firms are turned away. Want a second opinion on your current agency? The free 30-minute strategy call audits your funnel and pinpoints the leaks. See also how to hire a lead generation agency.

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