Google Ads agencies, compared on published evidence

Agencies with a verified published price

How to vet a Google Ads agency

1. Separate the fee from the media, in writing. Ask whether the fee is flat, a share of spend, or a hybrid, and get it in the proposal. A share-of-spend fee earns more as your costs rise, which is the wrong incentive in a rising auction. A flat fee against a named scope can be audited against the work actually delivered each month.
2. Insist the accounts are yours. The Google Ads account, the conversion tags, the audience lists and the historical data should sit in entities your company owns, with the agency granted access. Agencies that run campaigns inside their own manager account can take years of accumulated learning with them when the relationship ends.
3. Ask what they will do about landing pages. Google's documentation on Quality Score names landing page experience alongside expected click-through rate and ad relevance as inputs to how ads are ranked and priced. Ask which finalist writes and tests the pages, whether that sits inside the quoted fee, and who owns the result.
4. Audit the first month against the plan. Agree what the first thirty days contain: account structure, conversion tracking verification, negative keyword work, and a named set of tests. Then check it happened. The most expensive accounts in this market are the ones nobody touched between the onboarding call and the quarterly review.

What separates a good Google Ads agency from an average one

Very little of it is bidding. Google's own documentation explains that ad rank depends on expected click-through rate, ad relevance and landing page experience among other factors, not on bid alone, which means the levers that move cost per acquisition are mostly about matching: the right query to the right ad to the right page. A good agency spends its time on account structure, search term review, negative keywords, offer testing and page experience. An average one adjusts budgets and sends a report.

The second differentiator is measurement discipline. Conversion tracking that counts the wrong events, double counts, or credits calls that were wrong numbers will make a bad account look acceptable for a year. Ask any candidate what they do in week one to verify tracking, and expect a specific answer involving test conversions, deduplication and a reconciliation against your own records.

Fee structures and what they do to behaviour

Three structures dominate. A share of media spend is simple and common and misaligns incentives, since the agency's income rises with your costs and falls if it finds you savings. A flat monthly fee against a defined scope aligns better and requires you to define the scope carefully, because otherwise the incentive is to do less. Performance-based fees tied to acquisitions align best in theory and depend entirely on whether the conversion definition is honest, which is why they suit accounts with clean tracking and clear economics.

Whatever the structure, ask what happens in a bad month and who decides to pause spend. An agency that will recommend reducing your budget when the numbers say so, despite that reducing its own revenue, is demonstrating the only quality that reliably predicts a good long relationship in this market.

Questions that reveal experience quickly

Ask what the largest account they currently manage spends per month and what the smallest does, which tells you where you sit in their book. Ask how many accounts each specialist handles, since a manager with thirty accounts cannot give any of them weekly attention. Ask them to describe the last account they turned down and why. Ask what they would look at first in your account, and see whether the answer is diagnostic or generic.

Then ask for a short audit of your existing account before signing, if you have one. Serious agencies will do this or will offer it as a paid engagement, and either answer is fine. The audit itself is the sample of their work: whether it identifies specific wasted spend with search terms named, or produces a list of best practices that could apply to anyone.

Questions people actually ask

What does a Google Ads agency typically charge?

Most price as a flat monthly fee, a share of media spend, or a combination, and many set a minimum spend below which they will not take an account. Compare on total cost of ownership rather than fee alone: a lower fee on a poorly managed account is far more expensive than a higher fee on a well managed one, because the media is the bigger number.

How much should I spend on Google Ads to start?

Enough to gather data in a reasonable time. If your target cost per acquisition is a given figure, you need a multiple of it each month simply to learn whether the account can hit it. Budgets too small to produce regular conversions leave the account permanently in a learning state and produce no reliable conclusion at all.

Should the same agency handle SEO and Google Ads?

It can work well, because paid search data reveals which queries actually convert and that intelligence is valuable to the content plan. The risk is a firm strong in one discipline selling both. Ask who specifically does each, and be willing to split the work if the depth is only on one side.

How quickly should a new agency show improvement?

Structural fixes and wasted spend removal often show inside the first month because they are immediate. Meaningful movement in cost per acquisition usually takes two to three months as tests accumulate and automated bidding recalibrates. Be suspicious of both a promise of instant transformation and an account that looks identical after ninety days.

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