Most Google Ads accounts that come to us for a second opinion have the same problem: money leaving the account every day for reasons nobody has sat down to examine. A PPC audit is the process of examining that waste systematically — and deciding what to do about it.
A PPC audit is only as useful as the actions that follow it, and this article explains what a proper audit covers, what it costs, and how AI-driven management is changing who needs to commission one in the first place.
What PPC Audit Services Actually Cover
A PPC audit is a structured review of a paid search account — typically Google Ads — that identifies where budget is being wasted, where performance can be improved, and where settings have drifted from best practice. It is not a vague health check. A good audit produces a specific list of findings with clear recommendations.
PPC audit services vary considerably in scope. At the lighter end, you get a template-driven review covering quality scores, ad copy, and basic bid settings. At the more rigorous end, you get a detailed analysis of search term reports, audience segmentation, conversion tracking accuracy, landing page relevance, and negative keyword coverage.
Having run a marketing agency for nine years, we saw both types regularly. The template audits were useful for selling retainer work. The genuinely rigorous ones — the kind that took two days of focused analysis — were the ones that actually changed account performance. The difference is whether someone is reading the data or just screenshotting it.
For an SME spending between £1,000 and £10,000 per month on Google Ads, the most common findings are: broad match keywords absorbing budget without converting, conversion tracking firing incorrectly, ad scheduling not aligned to actual business hours, and bids set at account level rather than adjusted by device, location, or time of day.
Those are not exotic problems. They are the standard problems. And they appear in account after account because Google Ads is genuinely complex to manage well without either significant expertise or a system that checks these things continuously.
How Much PPC Audit Services Cost
The cost of a PPC audit depends heavily on who is doing it, how thoroughly they are doing it, and whether it is a standalone engagement or the front end of a management pitch.
Below is a rough breakdown of what the market looks like in the UK:
| Audit Type | Provider | Typical Cost | What You Get |
|---|---|---|---|
| Free account review | Agency sales process | £0 | Basic findings, often used to justify onboarding |
| Light audit | Freelancer | £150–£400 | Template-led, covers key settings and ad copy |
| Mid-tier audit | Specialist agency | £500–£1,200 | Search term analysis, bid review, conversion check |
| Deep audit | Senior consultant | £1,500–£3,000+ | Full account history, attribution modelling, competitor analysis |
Free audits are rarely neutral. When an agency offers a free PPC audit as a sales tool, the report will find problems — because it needs to justify the agency's retainer. That does not mean the findings are wrong, but it does mean they will be framed in a way that points toward the agency as the solution.
Paid audits from independent consultants tend to be more candid. If your account is actually performing well, an independent auditor will tell you that. A sales-driven audit rarely will.
For context on how PPC management costs compare more broadly, see our article on marketing agency fees versus AI-driven alternatives.
What a Google Ads Audit Should Always Check
Regardless of who is conducting PPC audit services, certain areas are non-negotiable. If any of these are missing from a report, the audit is incomplete.
Conversion Tracking Integrity
This is the one practitioners always check first. If conversion tracking is broken, every other metric in the account is unreliable. We have seen accounts where the same conversion was being counted three times — once from a Google tag, once from a linked Google Analytics goal, and once from an imported action — making the cost-per-acquisition look three times better than it actually was. No bid strategy or budget decision based on that data was trustworthy.
Confirming that conversion actions are firing correctly, not duplicating, and attributing to the right touchpoints is the foundation everything else sits on. For more detail on what miscounting does to CPA, see how to fix high cost per acquisition in Google Ads.
Search Term Coverage and Negative Keywords
Broad and phrase match keywords mean your ads appear for search terms you never intended to target. The search term report shows exactly what triggered your ads — and in most accounts we reviewed, a meaningful proportion of spend was going to irrelevant queries.
Negative keyword lists are the primary defence against this. A thorough audit will check whether negatives are applied at campaign and ad group level, whether they conflict with existing keywords, and whether the account has been harvesting new negatives regularly. Most accounts that have not been actively managed in the past six months will have significant negative keyword gaps.
Bid Strategy and Smart Bidding Settings
Google's automated bid strategies — Target CPA, Target ROAS, Maximise Conversions — perform very differently depending on account size, conversion volume, and how well the underlying data is set up. A common mistake is applying Target ROAS to a campaign with fewer than 30–50 conversions per month. The algorithm does not have enough signal to function properly and will either underspend significantly or overpay for clicks.
An audit should verify that the bid strategy chosen matches the actual conversion volume in the account, and that any learning periods following a strategy change have been respected rather than interrupted by constant adjustments. You can read more about this in our comparison of automated bid management versus manual bidding strategies.
Budget Allocation Across Campaigns
Many accounts have budgets set at campaign level that made sense when the campaign launched but have never been revisited. A high-performing campaign hitting its daily budget by noon is losing impressions in the afternoon. A campaign consistently underspending is either targeting too narrowly or bidding too low. Neither is obvious without looking at the data.
Budget reallocation is one of the clearest ways to improve account performance without spending more money. It is also one of the things that gets neglected most in accounts managed by busy in-house marketers or agencies with large client rosters.
When PPC Audit Services Are Worth It — and When They Are Not
A one-time PPC audit makes sense in specific circumstances: you have inherited an account and do not know its history, performance has dropped sharply and you cannot identify why, or you are about to significantly increase spend and want to validate the account structure first.
What a one-time audit does not do is maintain performance over time. The findings from an audit conducted in January will start going stale by March. Match types change, competitor activity shifts, Quality Scores fluctuate, and seasonal patterns affect which keywords are worth bidding on. An audit is a snapshot, not a system.
This is the core trade-off that most discussions of PPC audit services do not acknowledge: the audit identifies the problems, but someone still has to fix them — and then keep fixing them as new problems emerge. For smaller businesses that cannot justify a full-time PPC manager or a monthly agency retainer, that ongoing layer of management is often the missing piece. See our article on small business PPC agency fees for more on why this gap exists.
How AI-Driven Management Reduces the Need for Periodic Audits
The logic behind traditional PPC audit services assumes that someone reviews the account periodically and acts on what they find. The interval between reviews — whether monthly, quarterly, or annually — is where performance degrades.
An AI agent that is actively managing an account changes that dynamic. Rather than waiting for an audit to surface a problem, the agent identifies and responds to issues continuously. Bids are adjusted based on recent performance data. Underperforming ad groups are paused before they drain significant budget. Campaigns hitting their ceiling have budget redistributed toward those with room to scale.
Overtime is an AI agent built specifically for this kind of ongoing management. It logs into Google Ads accounts directly, makes adjustments based on performance data, and sends account owners a plain-language summary of what it has done and why. For an SME that does not want to pay agency fees but also does not have the time to manage campaigns manually, it fills the gap that periodic PPC audit services cannot.
This is not a case against audits entirely. If you have never had your account properly reviewed, doing so before connecting any management agent is sensible. But for businesses that want consistent performance rather than periodic diagnosis, continuous management is more valuable than periodic review.
For a broader look at how AI management compares to traditional approaches, the article on AI-powered PPC management for small businesses covers the key differences in detail.
What to Do After a PPC Audit
The most common failure point after commissioning PPC audit services is not the audit itself — it is the implementation. Audit reports can be long, technical, and organised in a way that makes prioritisation difficult. A list of forty findings is not a to-do list. It is a source of paralysis.
The practical approach is to triage findings into three categories: things that are costing money right now and need fixing this week, things that will improve performance over the next 30–60 days, and structural improvements that require more planning. Conversion tracking errors go in the first category. Ad copy testing goes in the second. Campaign architecture changes go in the third.
For accounts where wasted budget is the primary concern, our article on how to stop wasting budget on underperforming ads covers the specific optimisations that tend to move the needle fastest.
If you have recently had PPC audit services carried out and are now looking for a way to keep the account performing without ongoing agency fees, see what Overtime manages for accounts like yours. The AI agent works from the same principles a skilled human auditor would apply — checking performance, reallocating budget, pausing waste — but does it continuously rather than quarterly. That is what makes it genuinely useful in 2026, when the cost of inaction between reviews is higher than most account owners realise.
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Frequently Asked Questions
What does a PPC audit actually include?
A PPC audit covers a structured review of your paid search account, examining conversion tracking accuracy, keyword and match type coverage, negative keyword gaps, bid strategy settings, budget allocation, ad copy performance, and Quality Scores. The depth of analysis varies by provider, but a thorough audit should produce specific, prioritised recommendations rather than a generic list of issues.
How often should I get PPC audit services done?
For accounts being actively managed, a formal audit once or twice a year is usually sufficient. For accounts that have been left largely unmanaged, auditing before making significant changes is worth doing. The more important question is what happens between audits — continuous monitoring of performance data is more valuable than periodic reviews for catching issues early.
Why do free PPC audits often lead to agency pitches?
Free audits are typically used as a sales tool by agencies. Because the auditor has an interest in winning the account, findings tend to be framed around problems the agency can solve. That does not make the findings inaccurate, but it does mean the report is rarely neutral. Independent paid audits from consultants with no management interest tend to produce more balanced assessments.
Should I fix audit findings myself or hire someone?
It depends on the nature of the findings and your own capacity. Straightforward fixes — adding negatives, correcting conversion tags, adjusting ad schedules — can often be done in-house with guidance from the audit report. More complex structural changes, like rebuilding campaign architecture or overhauling bid strategies, benefit from experienced hands. If ongoing management is the gap, an AI agent is a cost-effective alternative to a full agency retainer.
Can an AI agent replace the need for PPC audit services?
An AI agent that actively manages an account does address many of the same issues a PPC audit would surface — wasted spend, bid misalignment, underperforming ads — but it does so continuously rather than as a periodic snapshot. It is not a direct replacement for a rigorous one-time audit, particularly if the account has structural problems or a long history that needs contextual interpretation. The strongest approach is an initial audit to establish a baseline, followed by ongoing AI management to maintain performance.