Hiring a PPC consultant in London costs more than most small business owners expect, and the results are rarely as predictable as the pitch suggests. Day rates sit between £400 and £800, retainers often start at £1,500 a month, and that's before your actual ad spend leaves your account.
This article breaks down what a PPC consultant London-based actually delivers, what it costs, where it falls short for SMEs, and why an AI agent is increasingly the more practical choice for businesses spending under £10,000 a month on Google Ads.
What a PPC Consultant London Charges
A PPC consultant London-side will typically charge in one of three ways: a flat monthly retainer, a percentage of ad spend, or a day rate for project work. The retainer model is most common, and for a London-based consultant with credible experience, you're unlikely to find anything below £1,200 a month.
The percentage-of-spend model sounds more aligned with your interests — you might pay 15–20% of whatever you're spending on ads. But it creates a quiet conflict of interest. A consultant on 15% of spend has a financial incentive to keep budgets high, not necessarily efficient.
Day rates for independent consultants in London generally run between £400 and £800. That's fine for a one-off audit or campaign build, but ongoing management on a day-rate basis gets expensive quickly.
Here's a rough breakdown of what you can expect to pay:
| Engagement Type | Typical Cost (London) | What's Included |
|---|---|---|
| Monthly retainer | £1,200–£3,500/month | Strategy, campaign management, reporting |
| Percentage of spend | 12–20% of ad budget | Management, some reporting |
| Day rate (project) | £400–£800/day | Audits, builds, one-off fixes |
| AI agent (Overtime) | Fraction of retainer cost | Daily optimisation, bid management, weekly summaries |
None of these figures include your actual Google Ads spend. That's always on top.
What They Actually Do Day-to-Day
This is where the picture gets more nuanced. When we ran our agency, the honest answer was that most of what consumed our time was repetitive: checking search term reports, adjusting bids, pausing underperforming ad groups, redistributing budget between campaigns. It was important work, but it wasn't the strategic consulting work clients imagined they were paying for.
A good PPC consultant London businesses trust will handle keyword research, write ad copy, structure campaigns correctly, and build out negative keyword lists. That's the foundational layer, and it genuinely matters. If your campaign structure is poor, no amount of bid management fixes it.
But the ongoing management — the week-to-week optimisation — is increasingly automatable. The decisions involved are data-driven and repetitive: if this keyword's cost per conversion has risen above your target for seven days, reduce the bid or pause it. That's not a judgement call that requires a human consultant.
For a deeper look at what agency-style management actually involves, this guide on what a Google PPC agency does for SMEs is worth reading alongside this article.
When a Human Consultant Makes Sense
There are situations where a PPC consultant London-based genuinely earns their fee. If you're entering a new market with no historical data, you need someone who can make informed structural decisions from scratch. If your account has been mismanaged and needs a full audit and rebuild, that's consulting work that benefits from experienced human judgement.
Complex accounts — multiple product lines, several geographies, shopping campaigns alongside search — carry enough moving parts that an experienced consultant adds real value in the setup and strategy phase. The same applies if you're running Performance Max campaigns alongside standard search and need someone who understands how the two interact.
The difficulty for most SMEs is that they're paying consultant-level fees for ongoing management work that, once the account is properly built, doesn't require consultant-level input every week. That's the gap that AI-driven management addresses.
If budget is the core constraint, this piece on what to do when a marketing agency is too expensive covers your realistic options clearly.
AI Agent vs PPC Consultant London: The Trade-Offs
An AI agent managing your Google Ads does several things well and a few things less well. Being clear about both is more useful than a one-sided comparison.
What an AI agent handles effectively: monitoring campaign performance continuously, adjusting bids based on real-time signals, pausing keywords or ad groups that are draining budget without converting, redistributing spend toward what's working, and generating readable summaries of what changed and why. Overtime does all of this by logging directly into your Google Ads account — no API workarounds, no manual exports.
What it doesn't replace: the initial strategic thinking that goes into account structure, the creative judgement behind strong ad copy, and the nuanced understanding of a specific industry or competitive landscape that an experienced consultant brings. If your campaigns have never been set up properly, an AI agent optimising a broken account won't fix the underlying problems.
The honest position, informed by years of running paid search for clients, is that most SMEs would be better served by a one-off structural audit from a consultant, followed by ongoing management via an AI agent. That's not a popular view in the agency world, but it reflects how the actual work breaks down.
For a direct comparison of the two approaches, Best PPC Agency or AI Agent: What SMEs Need covers the decision in more detail.
Finding a Reliable PPC Consultant in London
If you've decided a human consultant is the right starting point, there are a few things worth knowing before you sign anything.
Certifications matter less than track record. Google Partner status tells you someone passed an exam; it doesn't tell you they've managed a budget like yours profitably. Ask for references from accounts in a similar spend range and vertical.
Be wary of consultants who lead with technical jargon rather than commercial outcomes. Good PPC management ultimately comes down to cost per acquisition against your margin. If a consultant can't speak fluently about your target CPA and how they'll manage toward it, that's a warning sign.
Also ask what happens when they're on holiday. A solo PPC consultant London-based with no cover means your campaigns go unmonitored for two weeks. That's a real operational risk, particularly if you're running time-sensitive offers or in a competitive auction.
As we head into 2026, more London-based businesses are asking this question earlier in the process, which is partly why AI-powered PPC management for small businesses has grown so quickly as a category.
What Good Google Ads Management Actually Involves
Regardless of who or what manages your campaigns, certain fundamentals determine whether you get a return. Google's own guidance on how Smart Bidding strategies work is worth understanding, because it affects how both human consultants and AI agents interact with your bids.
Conversion tracking has to be correct. If your account isn't recording conversions accurately, every optimisation decision — human or automated — is based on flawed data. This is the single most common problem we saw in accounts that came to us after being managed elsewhere.
Negative keywords matter more than most SMEs realise. Budget wasted on irrelevant searches is invisible unless someone is actively reviewing search term reports. A good PPC consultant and a well-configured AI agent both prioritise this; a neglected account does not.
Bid strategy selection shapes everything downstream. If you're running Target CPA bidding without enough conversion data to support it, you'll get erratic results regardless of who's managing the account. Manual CPC with a disciplined approach often outperforms Smart Bidding on smaller budgets — something many consultants won't tell you because Smart Bidding is easier to manage.
For more on this, automated bid management vs manual bidding strategies is a useful reference.
If you're dealing with rising costs, how to fix high cost per acquisition in Google Ads gives you a practical diagnosis framework.
The Practical Next Step for London SMEs
If you're currently paying a PPC consultant London-based and feeling uncertain about the return, start by pulling your account's search terms report for the last 90 days. Look at what you've actually paid for. If more than 20% of your spend went to irrelevant queries, that's a management problem — and it's a solvable one.
If you haven't yet started Google Ads and are weighing whether to hire a consultant or try an AI agent first, the lower-risk path is usually to get your account structure right with a short consulting engagement, then hand ongoing management to Overtime to handle the daily optimisation work at a fraction of ongoing agency fees.
A ppc consultant london can provide real value at the strategy and setup stage. But for continuous bid management, budget reallocation, and performance monitoring, an AI agent that works every day — not just when a retainer justifies it — is a more consistent choice for most SMEs.
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