The short answer
You have three real options for running Google Ads: do it yourself, hire an agency, or work with an independent consultant. There is no universally correct answer, but there is a correct answer for your specific situation, and it comes down to the size of your operation, the value of your time, and how much the account actually needs a team versus one experienced person.
For most single-location service businesses, the honest answer is that an agency is more overhead than the account needs, doing it yourself is a false economy unless your time is nearly free, and a consultant, one expert working directly in your account, usually fits best. But that is not true for everyone, and I will tell you exactly when each option wins, including when it is not me.
I say all this as someone with an obvious bias: I am an independent consultant, so I make money when people choose that path. I am going to try to be honest anyway, and part of being honest is telling you plainly where the other options genuinely beat mine. I have run paid search for Sprint, Boost Mobile, and Fortune 500 brands, and now for pest control companies, movers, and chiropractors, so I have sat on the agency-scale side and the direct side both.
First, a reframe: this is not really a “Google Ads vs. agency” question
The phrase “Google Ads vs. hiring a marketing agency” is slightly misleading, because Google Ads is the thing being run and an agency is one way to run it. The real decision is who runs your Google Ads. The three answers are you, an agency, or a consultant. Let me take each honestly, including the real costs and the real failure modes.
Option one: run Google Ads yourself
What it looks like. You open the account, build the campaigns, write the ads, set the budgets, and manage it all yourself. Google Ads has no minimum spend and no contract, so the platform is genuinely open to anyone, as Google’s own budget documentation makes clear.
The real cost. On the surface, free, you only pay Google for clicks. But that ignores two hidden costs. First, your time: Google Ads rewards ongoing attention, and the hours you spend learning and managing it are hours not spent running your business. Second, the cost of mistakes: a beginner account typically wastes a meaningful share of its budget on the errors covered later in this piece, and that waste often exceeds what expert help would have cost.
When it genuinely wins. Doing it yourself is a real option when your budget is small, your market is not very competitive, and you have both the time and the temperament to learn. A determined owner running a simple Search campaign in a low-competition area can absolutely get results. If you enjoy the work and your time is not the constraint on your business, this can be the right call, at least to start.
When it fails. It fails when the account is left on autopilot, when the market is competitive enough that mistakes get expensive fast, or when the owner’s time is worth far more spent elsewhere. The most common outcome I see is not disaster, it is mediocrity: an account that limps along producing some leads while quietly wasting a third of its budget, with the owner unaware because there is no expert benchmark to compare against.
Option two: hire a marketing agency
What it looks like. You hire a company, a team, to run your ads. You get access to multiple specialists, established processes, and capacity to run across many channels and markets at once.
The real cost. A management fee on top of your ad spend, commonly a flat retainer starting around $1,500 to $2,500 a month for small accounts, or 15 to 20 percent of ad spend, rising with scope. For broad multi-channel work, small-business agency retainers often run into the several-thousands per month.
Where agencies genuinely win. Scale and breadth. If you are a multi-location operation, or you need paid search plus social plus SEO plus creative all coordinated, or you run substantial budgets across many markets, an agency’s team and infrastructure are worth real money. One person cannot cover that surface area reliably, and continuity matters: an agency does not go on vacation. This is a genuine strength, and if this describes you, a strong agency may beat any single person. I want to be clear about that.
Where agencies fall down for small businesses. The weakness is dilution, and it is structural, not a matter of finding a “good” agency. On a small account, the senior person who sold you the engagement rarely does the ongoing work. Your account gets handed to a junior manager running it alongside fifteen or twenty others, usually from a template, while you pay for the agency’s overhead: the office, the sales team, the account managers, the layers between you and whoever actually touches your campaigns. Industry news coverage of agency pricing and structure, such as the reporting at Search Engine Land, consistently highlights this tradeoff between a team’s capacity and the overhead it carries. You are buying a team’s capacity when your account only needs one good person’s attention, and paying the overhead of the former to get the junior end of the latter. For a single-location service business, that is frequently the worst value of the three options.
The contract trap. Many agencies also require long contracts with early-termination penalties. If the work is genuinely good, they do not need to lock you in. Long mandatory contracts mostly protect the agency from the consequences of underperforming, and they are a red flag worth taking seriously.
Option three: work with an independent consultant
What it looks like. You hire one expert who works directly in your account. The person you talk to is the person who does the work. No account managers, no layers, no template.
The real cost. A management fee, but with no agency overhead baked in. For hands-on senior work this often looks like a flat fee in the $1,500-a-month range plus ad spend, or hourly coaching for owners who run their own ads. You are paying for expertise, not for an office and a sales team.
Where consultants genuinely win. Precisely the situation most service businesses are in: one location, a defined service area, a customer worth a few hundred to a few thousand dollars, and an account that needs one experienced person managing it closely rather than a whole team. You get senior-level strategy actually applied to your account, direct communication, and no overhead tax. The person optimizing your bids is the person who built the strategy, which is exactly what a focused account needs.
Where consultants fall down. Capacity and continuity. One person can only take on so many clients, and unlike an agency, a consultant does take vacations and can get sick. If you need a large team running many channels across many markets simultaneously, a single consultant is the wrong tool, and an honest one will tell you so. For a small service business, this limitation rarely bites. For a large multi-market operation, it can be decisive.
This is the model I built my practice around, and I built it around this specific gap: enterprise-grade strategy, the kind I ran for Sprint and Fortune 500 brands, applied directly to a service business without the agency layers. When you call, you get me. But I am telling you plainly that if you are a fifteen-location operation running six channels, that is not what you need, and you should hire a real team.
A simple way to decide
Strip away the noise and the decision usually comes down to a few honest questions.
How competitive is your market and how big is your budget? Low competition and a small budget can make doing it yourself viable. Serious competition or a real budget usually justifies expert help, because the waste from mistakes exceeds the fee.
How much is your time worth? If the hours you would spend learning and managing ads are worth more spent running your business, paying an expert is not a cost, it is a trade that frees your most valuable resource.
How much surface area does the work cover? One location and one or two channels point toward a consultant. Many locations and many channels coordinated together point toward an agency.
Does the account need a team, or one good person? This is the crux. Most single-location service businesses need one experienced person managing a focused account closely. They do not need, and should not pay for, a team’s overhead to get junior execution. Larger, more complex operations genuinely need the team.
A rough default for a typical service business: start by doing it yourself only if your budget is small, your market is soft, and you have the time. Otherwise, a consultant usually gives you the best value for a focused local account. Reserve the agency for when your operation has grown into genuine multi-channel, multi-market complexity.
What to look for, whichever you choose
If you hire anyone, agency or consultant, the same green flags and red flags apply, and they matter more than the label.
Green flags: they ask about your business and your numbers before pitching; they talk in cost per acquisition, not clicks; they insist on conversion and call tracking; you own your Google Ads account and data; and they are willing to tell you no, including telling you when ads are not your real problem.
Red flags: guaranteed results (nobody can promise a specific number in an auction); long contracts with penalties; vague reporting that never answers whether you made money; no named human who will actually work on your account; and one identical campaign template applied to every client regardless of their business.
These are the same standards I laid out in more detail in the piece on what a performance marketing agency is and when to hire one, and they hold regardless of which path you pick. If you already run ads and want an objective read on whether your current provider is meeting them, an account audit is the fastest way to find out. The label matters far less than whether the person or team is accountable to booked jobs and revenue.
The honest bottom line
There is no universally right answer to running Google Ads yourself versus hiring an agency, but there is a right answer for you. Do it yourself if your budget is small, your market is soft, and your time is genuinely available. Hire an agency if you have grown into real multi-channel, multi-market complexity that needs a coordinated team. Work with a consultant, the option that fits most single-location service businesses, when your account needs one experienced person managing it closely rather than a team’s overhead layered on top of junior execution.
The worst outcome is not picking the “wrong” option in the abstract. It is paying agency overhead for junior work on an account that needed one good person, or running it yourself on autopilot while a third of your budget quietly leaks. Match the choice to the size and complexity of your operation, and hold whoever you hire to cost per acquisition and revenue rather than clicks.
If you want help figuring out which path actually fits your business, that is exactly what a strategy call is for, and I will give you a straight recommendation even when it is not me. If a consultant is the right fit and you want your ads built and run properly, done-for-you management is that path. If you would rather run them yourself with expert guidance, coaching and audits gives you exactly that without an account takeover. Either way, you will get an honest read on where your money should go.
Have me run your ads → I already run ads, get a second opinion →
Joe Lowery is an independent Google Ads consultant serving service businesses across the United States. He has run paid search for Sprint, Boost Mobile, and Fortune 500 brands, and now runs it for pest control companies, movers, chiropractors, and small businesses that need their phone to ring. Google Ads Certified. No contracts. Direct access to Joe.