When to hire a Google Ads agency (and what to expect)

Most founders run Google Ads themselves for longer than they should. It works, just about, so paying someone never feels urgent. Then the account plateaus, cost per lead creeps up, and nobody has time to find out why.

The signs you have outgrown doing it yourself

You spend a few thousand a month and cannot say which campaigns make money. You have not opened the search-terms report in weeks. Performance Max is running because Google suggested it. The account keeps filling with campaigns nobody turns off. That is not a competence problem. It is a time problem, and time is the thing you do not have.

What a Google Ads agency actually does

The work is account structure, keyword and negative management, bid strategy, conversion tracking, ad copy and assets, landing-page feedback, and reporting that ties spend to revenue. A good agency starts with an audit, finds the waste, then cuts the account back to fewer campaigns fed properly. The first month is usually about stopping losses, not adding spend. This is the core of what Mira's PPC management does, and the order matters: fix tracking, kill waste, then scale.

What it costs

Two common models. A percentage of ad spend, usually 10 to 20 percent, scales with budget but can pull the agency toward spending more rather than spending well. A flat monthly fee is more predictable, which is why we use it. The fee is rarely the real cost anyway. The spend is, and a good agency earns its fee back in waste it removes before it adds a penny of growth. When you see "Google Ads agency pricing" quoted as a single number, ask what it covers, because management of a 2,000 pound budget and a 50,000 pound budget are not the same job.

Ecommerce or B2B: not the same account

An ecommerce account lives or dies on the feed, Shopping and Performance Max, and return on ad spend. A B2B account is built around search intent, lead quality and a sales cycle that finishes offline weeks later. An agency that only knows one will quietly misread the other. Ask which they run most, and how they measure success in your model, before you sign. For the ecommerce side, it is worth knowing what good ROAS actually looks like so you can hold them to a real number.

Agency, freelancer or in-house

A freelancer is cheaper and fine for one stable account. An in-house hire makes sense once you are big enough to keep a specialist busy, broadly past 5M in revenue. In between, an agency gives you senior cover across the account, holiday and churn cover, and pattern recognition from running many accounts that one person cannot match. Hiring a junior generalist for a specialist job is the expensive mistake.

Local or national

"Google Ads agency near me" is a fair search, but proximity matters less than presence. A national name that never reviews your account is further from your business than a local team that does. If you are in the North East, a PPC agency in Newcastle you can sit across a table from beats a faceless dashboard, but the deciding factor is who touches the account each week, not the postcode.

What the first 90 days should produce

A clean account and an honest baseline in the first month. The first real tests in the second, with enough budget behind each to trust it. By day 90, improvement on a number you actually report, like cost per lead or return, not click-through rate. If your agency cannot show you that arc, the retainer is drifting.

How to choose one

Ask who runs the account, by name, and whether you keep them. Ask what they would change in the first 30 days. Ask the notice period, because confidence shows up as a short one. Ask what they would refuse to do.

FAQ

• How much does a Google Ads agency cost? Either a percentage of spend, around 10 to 20 percent, or a flat monthly fee. The fee matters less than what the agency saves and earns on the spend itself.
• Is a Google Ads agency worth it? Past a few thousand a month, usually yes. The waste a good agency removes tends to cover the fee before any new growth.
• What does a Google Ads agency do? Structure, keywords and negatives, bidding, tracking, ad copy and assets, and reporting tied to revenue.
• Agency or freelancer? A freelancer for one stable account. An agency when you need senior cover, continuity, and breadth.
• Do I need a specialist for ecommerce or B2B? Yes. The feed and ROAS run the ecommerce account; intent and lead quality run the B2B one. Ask which they know best.

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