Most small businesses that hire pay per click companies do so because Google Ads feels overwhelming — and it is. The auction mechanics, quality scores, bid strategies, and negative keyword lists all interact in ways that take years to understand properly. The problem is that the solution most people reach for — a traditional PPC agency — comes with its own set of complications.
This article breaks down what pay per click companies actually do, how to evaluate them, what they cost, and when an AI agent is a more sensible option for an SME.
What Pay Per Click Companies Actually Do
Pay per click companies manage paid search campaigns on behalf of clients. At the core, that means controlling where money goes inside Google Ads: which keywords trigger ads, how much is bid on each auction, which ads are shown, and how budget is distributed across campaigns.
The day-to-day work is more granular than most business owners realise. A competent PPC manager is checking search term reports to catch irrelevant queries, monitoring impression share to understand whether budget is the constraint or bid competitiveness, and adjusting device bid modifiers when mobile traffic converts at a different rate to desktop. These are not occasional tasks — they need to happen continuously.
Beyond the active management, most pay per click companies also handle account structure (how campaigns and ad groups are organised), ad copy testing, landing page recommendations, and conversion tracking setup. The quality of that last item — conversion tracking — largely determines whether the rest of the work is meaningful. If conversions are not tracked accurately, every optimisation decision is based on incomplete data. For a deeper look at what this process involves in practice, see what a paid search service actually does.
Understanding what you are buying when you hire a PPC agency is not straightforward. The service can range from genuinely active management to a monthly report with minimal changes in between.
How Pay Per Click Companies Charge
Pricing across pay per click companies varies considerably, and the structure of that pricing matters as much as the headline number.
The most common model is a percentage of ad spend. This is typically between 10% and 20% for agencies working with SMEs. On a £2,000 monthly ad budget, that is £200–£400 per month on top of the media spend itself. The obvious problem with this model is that the agency earns more when you spend more — not when you perform better. There is a structural misalignment between agency revenue and client outcomes.
Flat monthly retainers are the alternative. These give you a predictable cost regardless of how much you spend on ads, which makes budgeting simpler. The risk is that a flat fee can create an incentive to do the minimum required to retain the account rather than the work required to improve it.
A smaller number of agencies work on a performance basis — taking a share of revenue or leads generated. This aligns incentives better, but is harder to set up correctly and is less common at the SME end of the market.
| Pricing Model | Typical Cost (SME) | Incentive Alignment | Predictability |
|---|---|---|---|
| % of ad spend | 10–20% of budget | Low — spend more, earn more | Medium |
| Flat retainer | £400–£1,500/month | Medium | High |
| Performance-based | Variable | High | Low |
| AI agent | Fixed low monthly fee | High | High |
For a clearer picture of what ad spend itself looks like before management fees, this breakdown of ad costs on Google for SMEs is worth reading before you start getting quotes.
What to Look for When Evaluating PPC Agencies
After nine years running a marketing agency, the single most reliable signal of a good pay per click company is how they talk about conversion tracking before they talk about anything else. Agencies that lead with creative or strategy before confirming your tracking is airtight are prioritising the wrong things.
The second signal is specificity. Can they tell you, precisely, what they will change in your account each month and why? Vague promises about "optimising your campaigns" or "improving performance" are not commitments — they are placeholders. Ask what their process looks like week by week.
Third, ask about reporting. What data do they share, how often, and in what format? A monthly PDF with click and impression numbers is not sufficient. You should be seeing cost per conversion trends, search term data, and quality score movement at minimum.
Fourth, understand who is actually managing your account. At many agencies, the salesperson is a senior figure and the actual account manager is relatively junior. Account churn at agencies is significant — the person who onboards you may not be managing your account six months later.
For SMEs comparing agency-managed services to other options, this comparison of PPC agency services and what SMEs actually get covers the gap between what is promised and what is delivered in practice.
Questions to Ask Before Signing
Specific questions tend to reveal more than general ones. Ask to see an example of a search term report and what action they took from it. Ask how they handle a campaign that is spending budget without converting. Ask what their policy is on negative keywords — how often do they add them, and who approves changes.
These operational questions separate agencies that run accounts actively from those that set campaigns up and check in monthly. The difference in outcome between those two approaches is significant.
When Pay Per Click Companies Are the Right Choice
Traditional pay per click companies make the most sense in specific circumstances. If your account is complex — multiple product lines, several countries, significant seasonal variation — human strategic oversight genuinely adds value. A skilled PPC strategist can make calls that require contextual judgement: pulling back on spend during a PR crisis, shifting budget toward a new product launch, or identifying that a landing page is the real constraint rather than the ads themselves.
Agencies also make sense when you have a large enough budget to justify the management fee without it distorting your cost per acquisition. If your management fee represents more than 30% of your total Google Ads spend, you are likely better served by a different model. You can check how much Google Ads typically costs for SMEs to calibrate what proportion of your total budget a management fee would represent.
For most SMEs spending between £500 and £3,000 per month on Google Ads, the economics of a traditional agency are difficult to make work. The fees are proportionally high, the accounts are often too small to receive senior attention, and the reporting cycles are too slow to catch problems quickly.
What Agencies Genuinely Do Well
It is worth being fair here. Good pay per click companies bring pattern recognition across many accounts that an in-house manager or a business owner cannot replicate. They have seen what works in your sector across dozens of clients. They know which bidding strategies Google's algorithm handles well and which require manual intervention. That accumulated knowledge has real value — the question is whether the pricing model makes it accessible at the SME level.
Overtime is an AI agent that handles the active management layer of Google Ads — bid adjustments, pausing underperforming keywords, reallocating budget, and sending account summaries — at a cost that makes sense for smaller budgets. It does not replace strategic thinking, but it does replace the repetitive execution work that consumes most of an agency's billable hours on SME accounts.
AI Agent vs Traditional PPC Management
The comparison between an AI agent and a traditional pay per click company is not a simple better/worse question. They are genuinely different in what they offer.
A traditional agency provides human judgement, strategic planning, and the ability to respond to context that sits outside the account data — a competitor going into administration, a product recall, a shift in market positioning. An AI agent provides speed, consistency, and cost-efficiency in executing the tactical layer of account management.
For SMEs, the honest assessment is that most of the value in PPC management is in the tactical execution: catching wasted spend quickly, adjusting bids when cost per click trends upward, pausing ad groups that are burning budget without converting. These are tasks that benefit from being done frequently and systematically — not occasionally and manually.
Comparing pay per click software against an AI agent for SMEs covers this distinction in more detail, including where automation has clear limits.
The pricing structure for Overtime reflects this positioning — it is not trying to replicate a full-service agency relationship, but it does handle the operational work that determines whether a Google Ads account improves week over week or sits static.
What Drives Performance in Paid Search
Regardless of whether you use a pay per click company or an AI agent, the same factors drive account performance. Quality Score — Google's rating of how relevant your ad and landing page are to the keyword — determines both your ad rank and your cost per click. A high Quality Score means you pay less for the same position than a competitor with a lower score. Improving it requires aligning keyword intent, ad copy, and landing page content.
Bid strategy is the second lever. Google offers several automated bid strategies — Target CPA, Target ROAS, Maximise Conversions — and the right choice depends on how much conversion data your account has accumulated. Accounts with fewer than 30–50 conversions per month often perform better on manual or enhanced CPC bidding, because automated strategies need data to calibrate against. Most pay per click companies understand this; some push automated strategies regardless because they require less active management.
Negative keywords remain one of the highest-ROI activities in Google Ads management, and one of the most frequently neglected. Adding a thorough negative keyword list at the start of a campaign and reviewing search term reports weekly can reduce wasted spend significantly. For a better understanding of how keywords work across the full Google Ads auction, this guide to AdWords keywords for SMEs is a solid reference.
As we move through 2026, Google's own AI tools inside the platform — Performance Max, broad match with smart bidding — are taking more control away from manual managers. This changes what pay per click companies need to do: less manual bid management, more strategic direction and feed quality management for ecommerce accounts.
Making the Right Call for Your Business
The decision is not really about pay per click companies versus any other option in the abstract. It is about what your account needs, what your budget can support, and how much strategic input is genuinely required.
If you are spending under £3,000 per month on Google Ads, the fee structure of most PPC agencies means you are either paying a disproportionate amount in management costs or you are being underserviced. The accounts that tend to thrive at this budget level are those with tight campaign structures, strong negative keyword lists, accurate conversion tracking, and frequent tactical adjustments — exactly the work an AI agent handles well.
For those already using an agency and wondering whether they are getting value, the clearest test is this: ask your account manager to show you every change made to your account in the last 30 days. The list should be long. If it is not, that is your answer.
If you want to see how an AI agent handles the active management of a Google Ads account without agency-level fees, Overtime's approach to Google Ads management is worth reviewing alongside any agency quotes you are collecting.
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Frequently Asked Questions
What do pay per click companies charge for managing Google Ads?
Most pay per click companies charge either a percentage of your monthly ad spend (typically 10–20%) or a flat monthly retainer (commonly £400–£1,500 for SME accounts). The total cost is always your media spend plus the management fee, so at lower budgets the management fee can represent a significant proportion of your total investment.
How do I know if a PPC agency is actually managing my account?
Ask for a log of every change made to your account in the past month — bid adjustments, negative keywords added, ad copy tested, budget shifts. A well-managed account should show frequent, documented changes. If the change log is sparse, the account is likely being monitored rather than actively managed.
What is the minimum budget to make Google Ads worthwhile?
There is no universal minimum, but accounts with less than £500 per month in ad spend often struggle to generate enough conversion data for Google's algorithms to optimise effectively. Below this threshold, highly targeted manual campaigns on a small number of high-intent keywords tend to outperform broader automated approaches.
Should a small business use an agency or an AI agent for PPC?
For most small businesses spending under £3,000 per month on Google Ads, an AI agent offers better value than a traditional agency. The tactical execution work — bid adjustments, budget reallocation, pausing underperformers — is well-suited to automation, and the cost savings are significant. Larger accounts with complex strategy requirements may still benefit from human oversight.
Can pay per click companies guarantee results?
No legitimate pay per click company should guarantee specific results. Google Ads performance depends on auction competition, landing page quality, and market demand — none of which any agency fully controls. Guarantees of specific cost per lead or ROAS figures are a warning sign, not a selling point.