Let’s be real: paid advertising in 2026 is pretty complex. Google Ads now runs on AI-powered bidding, and Performance Max has consolidated your entire paid footprint into a single automated structure. Not to mention, the cost-per-click is rising across most competitive sectors. Keeping up with all of it is, frankly, a full-time job.
That’s why more businesses are choosing to work with a specialist PPC agency rather than managing campaigns in-house, but what does a PPC agency actually do? What should you expect to pay? And how do you find a good one?
This guide answers all of it. At eComOne, we work with growing eCommerce brands to build paid media strategies focused on revenue, not just traffic. So let’s get into it.
What Is a PPC Agency?
PPC stands for pay-per-click. It’s a model of digital advertising where you pay each time someone clicks your ad. A PPC agency specialises in building, managing and optimising paid campaigns across platforms like Google, Microsoft, Meta and others.
The work goes well beyond setting a budget and pressing go. A serious PPC agency handles strategy, audience research, bid management, creative direction, tracking setup, feed management, landing page analysis, reporting and ongoing testing.
Most offer some or all of the following:
Google Ads (Search): text ads that appear when someone searches for a relevant term. Still one of the highest-intent advertising channels available.
Google Shopping: product listing ads showing your products, prices and images directly in search results. Essential for eCommerce. Feed quality and structure directly determine performance.
Microsoft Ads: the Bing equivalent of Google Ads. Often overlooked, but it delivers strong returns for B2B and older demographics at lower CPCs than Google.
Performance Max: Google’s AI-driven campaign type that serves ads across Search, Shopping, YouTube, Display, Gmail and Maps from a single campaign. Powerful when set up correctly. Problematic when left unmanaged.
Paid social: ads on Meta, TikTok, Pinterest and LinkedIn. More interruption-based than search, so creative quality matters considerably more.
Remarketing: showing ads to people who’ve previously visited your site or interacted with your brand. One of the most cost-efficient uses of ad spend, done well.
Conversion tracking and attribution: setting up accurate measurement so you know which campaigns are actually driving revenue.
Landing page optimisation: analysing where paid traffic lands and improving conversion rates, because more traffic only helps if the page converts.
Feed management: for eCommerce brands, the product feed powering your Shopping ads needs regular maintenance and optimisation to compete.
If a PPC agency can’t speak fluently across most of these areas, they’re probably not the right partner for a serious eCommerce business.
How Can a PPC Agency Help You?
The straightforward answer is this: a good PPC agency makes your paid advertising more profitable.
But the specific ways they create value are worth understanding.
Cutting wasted spend. Most self-managed Google Ads accounts contain significant waste. Broad match keywords driving irrelevant traffic. Poor Quality Scores inflating CPCs. Low-intent clicks eating budget that should go to high-intent searches. An experienced agency will identify and cut this quickly.
Improving ROAS. Return on ad spend is the metric that matters most for eCommerce. Agencies with real eCommerce experience understand the relationship between ROAS targets, margin and customer acquisition costs. They build bidding strategies around profitability, not just volume.
Scaling what’s working. Scaling paid media isn’t just a case of increasing budgets. Machine learning systems need the right data signals. Bids need adjusting as competition shifts. Audiences behave differently at higher spend levels. Agencies manage that complexity, typically through a regular cadence of testing and refinement: A/B testing ad copy, adjusting bids on performance data, refreshing audience signals, improving feed quality.
Improving conversion rates. Traffic is only half the equation. A good PPC agency looks at your landing pages, checkout flows and product pages, not just your ads, and identifies where customers are dropping off.
Staying current. Google Ads releases significant updates regularly. Staying across Performance Max, Demand Gen campaigns, AI Overview ad placements and evolving attribution models is essentially a full-time job. Agencies absorb that overhead so you don’t have to.
Here’s a real-world example. A mid-sized outdoor clothing brand running Shopping campaigns with a poorly structured feed and an unoptimised Performance Max campaign might be generating a ROAS of 3x. With proper feed segmentation, campaign restructuring and audience signal improvements, that same budget could realistically deliver 5x or 6x. The gap between average and good PPC management is genuinely significant.
Why Hire a PPC Agency Instead of Managing Ads Yourself?
DIY PPC is possible. The tools are accessible. Google’s own tutorials are reasonably good. For small accounts with simple product ranges, someone willing to invest the time can manage campaigns adequately.
But there are several points at which hiring an agency makes more financial sense.
When the account has grown beyond one person’s capacity. A Google Ads account covering multiple campaigns, product categories and audience segments across Search, Shopping and Performance Max needs ongoing daily attention. If the person managing it has other responsibilities, performance suffers.
When AI-driven campaigns need proper configuration. Performance Max, Smart Bidding and automated bidding strategies all depend on clean data inputs, proper audience signals and correct account structure. Without that foundation, Google’s automation optimises for the wrong things. An agency that works with these systems daily will configure them far better than someone learning as they go.
When attribution is unclear. If you can’t confidently say which campaigns are generating revenue and which are burning budget, you can’t make good decisions. Setting up GA4 integration, enhanced conversions and accurate ROAS tracking is technical work. Agencies do it routinely.
When CPCs are rising and returns are falling. This usually signals that account structure, bidding strategy or Quality Scores need professional attention, not just more budget.
When does DIY still work? Early-stage businesses with limited budgets and a single, simple product range, where PPC lets you compete for high-intent search traffic immediately while organic rankings are still being built. The real question is whether the margin on your products or the value of a customer justifies the cost per acquisition; for very low-margin products or small average order values, the economics can be challenging, though a properly structured account with tight targeting and strong negative keywords can work well even at modest budgets. If you’re spending less than £1,000 per month on ads, the management fee may not be justified yet. But that threshold is lower than most people assume once you factor in the cost of poor performance.
What Is the Difference Between an SEO Agency and a PPC Agency?
SEO agencies focus on earning organic traffic through improvements to rankings, authority and visibility in unpaid search results. PPC agencies focus on paid traffic through advertising. Both aim to generate revenue through search, but the mechanisms, timelines and cost structures are entirely different.
| – | SEO | PPC |
|---|---|---|
| Traffic type | Organic (unpaid) | Paid |
| Time to results | 3 to 12 months typically | Days to weeks |
| Cost structure | Agency fee; no cost per click | Agency fee plus ad spend budget |
| Longevity | Rankings can persist long-term | Stops when budget stops |
| Best for | Long-term brand building | Immediate revenue, new launches, seasonal demand |
| Key metrics | Rankings, organic revenue, sessions | ROAS, CPA, conversion rate |
| Creative requirements | Content, technical SEO | Ad copy, creative, landing pages |
With PPC, you can start generating traffic within days of launching a campaign, though meaningful optimisation typically takes 60 to 90 days, since Smart Bidding strategies need conversion data to function properly. Expect the first month to involve significant learning, the second to show clearer trends, and the third onwards to reflect a properly optimised baseline.
Neither is inherently better, most growing eCommerce brands benefit from both running at the same time. SEO builds compounding long-term value. PPC delivers more immediate and controllable revenue. Some agencies offer both, with the advantage of that being an integrated strategy and shared data.
How Much Does an Agency Charge for PPC?
UK PPC agency pricing typically follows one of three models.
Flat monthly retainer. A fixed fee regardless of ad spend. Common at smaller agencies and boutique specialists. Gives you cost predictability. The risk is that at higher ad spend levels, you may not be getting enough management time for the complexity involved.
Percentage of ad spend. Typically 10 to 20% of monthly ad spend, with a minimum fee. Scales with your budget, so the agency is incentivised to grow your campaigns. Some clients worry about alignment of incentives here. A larger budget means more revenue for the agency regardless of efficiency. Look for agencies that tie performance to ROAS and profitability targets, not just spend volume.
Performance-based. A portion of fees tied to hitting agreed targets: ROAS, revenue or CPA. Less common, but available from confident agencies. Requires clean attribution and agreed measurement.
Realistic UK pricing ranges in 2026:
Freelancers typically charge £300 to £800 per month at lower spend levels and can offer good value for straightforward accounts. But they lack the team capacity, tooling and strategic breadth of a specialist agency.
And on cheap PPC management: lower-priced agencies often manage more accounts per person. Less time per account means slower responses and reactive rather than proactive optimisation. PPC needs ongoing attention. The cost of underperformance almost always exceeds the saving on a cheaper fee.
It’s also worth separating the agency fee from the cost of the ads themselves. CPCs have risen across most sectors, particularly in retail, insurance, legal and home improvement, but whether Google Ads is expensive relative to the revenue it generates depends on your account quality, conversion rate and average order value, not just the headline CPC. Well-managed campaigns in competitive sectors can still deliver strong ROAS.
What’s the Most Cost-Effective PPC Agency Model?
It depends on your business size, complexity and stage of growth, though a few principles tend to hold true across the board.
Freelancers work well for simple accounts, tighter budgets and businesses that already have strong internal strategic direction and just need extra hands for execution. They’re less suited to complex eCommerce accounts, multi-platform management, or accounts that need a dedicated team behind them.
Boutique specialist PPC agencies often strike the best balance for growing eCommerce brands, pairing deep expertise with close attention, you’re working with senior specialists rather than a junior account exec spread thin across dozens of clients.
Full-service digital agencies offer the advantage of having SEO, PPC and other channels managed under one roof, which can mean a more joined-up strategy across the board. As with any agency model, it’s worth asking exactly who’ll be hands-on with your PPC and what experience they bring, so the expertise behind your account matches the scale of what you’re spending.
In-house PPC starts to make sense once spend is high enough to justify a full-time hire, typically £10,000 or more a month in ad spend. Even then, many businesses keep an agency on for strategic input and access to tools they wouldn’t otherwise have.
Ultimately, the most cost-effective model is whichever one keeps agency fees a small fraction of the extra revenue it generates. A specialist agency charging £2,000 a month that lifts your ROAS from 3x to 5x on a £15,000 monthly spend is creating far more value than it costs. The cheapest option on paper is rarely the most cost-effective one in practice.
How Do You Choose a Good PPC Agency?
There are a lot of PPC agencies in the UK. Many are competent. Some are excellent. A minority aren’t worth engaging. Here’s what to look for.
Relevant industry experience. Generic PPC agencies and eCommerce PPC agencies are different things. eCommerce accounts involve product feeds, Shopping campaigns, dynamic remarketing and ROAS-based bidding that general agencies handle less well. Ask for case studies specific to your sector. Verified Google Premier Partner status is also worth checking for, as a baseline signal of platform competence, alongside a genuine track record of improving ROAS and revenue for brands similar to yours.
Reporting transparency. Every agency reports on performance. The quality varies enormously. Ask to see an example report. Does it focus on revenue and profitability, or traffic and impressions? Does it explain what changed and why, or just present numbers?
Attribution setup. Ask how they plan to measure conversions. If they only mention last-click attribution, or don’t raise GA4 integration and enhanced conversions at all, be cautious.
Communication quality. How responsive is the agency during the sales process? A slow or generic response before you’re a client tells you something about what account management will feel like afterwards.
CRO understanding. The best PPC agencies know that landing page conversion rate is as important as click-through rate. If an agency only ever talks about ads and never mentions on-site experience, that’s a gap.
Client retention. Ask what their average client tenure is, and don’t hesitate to ask to speak to a current client or two directly. High churn is a meaningful warning sign.
Red flags to watch for:
How to Evaluate PPC Agency Performance
Once you’ve appointed an agency, knowing which metrics to track, and which to treat with scepticism, is important.
Metrics that genuinely matter for eCommerce:
ROAS is the primary performance indicator for most eCommerce businesses. Be clear whether you’re measuring revenue-based ROAS or profit-based ROAS. The latter is more meaningful but requires margin data.
CPA matters if your goal is customer acquisition rather than immediate transaction revenue. Understand what a new customer is worth over their lifetime before setting CPA targets.
Revenue growth from paid channels, tracked accurately through GA4 with proper attribution, is the clearest overall indicator of whether your PPC investment is working.
New customer acquisition rate matters too. For growing brands, acquiring genuinely new customers is often more valuable than re-engaging existing ones. Good agencies track this.
Conversion rate at landing page level is worth monitoring closely. Improvements here multiply the value of all your ad spend at once.
Metrics that can mislead:
Impression share, clicks and click-through rate are useful diagnostic indicators. But they’re not meaningful measures of business performance. A campaign can have excellent CTR and terrible ROAS.
Quality Score improvements are worthwhile to track, but they should never be reported as an end in themselves.
Falling CPC isn’t automatically a win. Cheaper clicks from lower-intent audiences don’t help if your conversion rate falls with them.
A good agency makes this distinction clearly. Every conversation should come back to revenue and profitability, not platform metrics.
Which Agencies Specialise in PPC?
Some agencies focus exclusively on paid media. Others offer PPC as part of a broader service including SEO, email and content. The right choice depends on whether an integrated strategy adds value for your business, and for eCommerce brands, it usually does. Paid and organic channels interact closely enough that having them joined up matters.
eCommerce is consistently one of the strongest use cases for PPC, given the direct link between ad spend and purchase intent, though professional services, home services, B2B SaaS, education and hospitality also perform well, generally where customer lifetime value or average transaction values are high. Google Shopping in particular is one of the most effective channels available to eCommerce brands: showing products with prices and images at the exact moment someone is searching to buy is a highly valuable placement, though feed quality and account structure are what actually determine whether it works, and both need ongoing investment to stay competitive.
eComOne’s paid media services are built specifically for eCommerce. We manage Google Shopping campaigns, paid search on Google and Microsoft and paid social advertising with a consistent focus on revenue and profitability. We work with brands generating £3M or more in online revenue who need PPC to perform at scale.
Ready to Get More From Your Paid Advertising?
Managing PPC well in 2026 takes platform expertise, analytical rigour and a clear focus on what actually drives revenue. If your current campaigns aren’t delivering the returns you need, or if you’re looking to scale beyond what your current setup can support, it’s worth talking to people who work on these problems every day.
eComOne’s PPC services are built for eCommerce brands that need more than competent account management. We focus on profitability, sustainable growth and transparency. And we work best with businesses that want to treat paid media as a serious revenue channel.
If that sounds like where you are, we’d be glad to talk through what’s working and what isn’t.
