Last updated: September 2026
In-house Google Ads management means your own team runs the strategy, keyword selection, ad copy, bidding, and reporting. Hiring an agency means paying a specialist team to do that work for you, on top of your ad budget. For most UK businesses spending between £2,000 and £50,000 a month on ads, an agency costs significantly less than a dedicated in-house hire and typically gets better results because you get a full team of specialists rather than one person. Here is an honest breakdown of when each option makes sense.
What Does Managing Google Ads In-House Actually Involve?
Managing Google Ads in-house means someone on your team handles everything: keyword research, negative keyword lists, ad copy testing, bid strategy, landing page alignment, conversion tracking, and monthly reporting. In 2026 that also includes Performance Max asset groups, AI briefs, demand gen campaigns, and AI Max for Search, all of which require a working understanding of how Google machine learning reads and uses your inputs.
A marketing manager who takes on Google Ads alongside existing responsibilities will typically spend one to two years making expensive mistakes before developing the instincts to run campaigns well. An account spending £5,000 per month with a 20% waste rate is burning £1,000 per month that a more experienced manager would recover. Over 12 months that is £12,000 in wasted budget on a single account.
Pros of In-House
- Deep business knowledge: No one understands your customers, products, and margins better than your own team
- Speed: No waiting for agency response times. Changes happen immediately
- Full control: You own the strategy and execution entirely
- No management fees: You pay the ad spend and the salary, nothing on top
Cons of In-House
- Skill gap: Google Ads is complex. A marketing generalist rarely matches a specialist
- No cross-industry insight: An in-house team only sees your data. Agencies see patterns across dozens of accounts
- Tool costs: Bid management, competitor analysis, and reporting tools add up (£500-2,000/month)
- Single point of failure: If your PPC person leaves, your campaigns suffer immediately
What Does a Google Ads Agency Actually Do for You?
An agency manages your Google Ads on your behalf and charges a management fee on top of your advertising budget, typically either a flat monthly fee or a percentage of ad spend, usually between 10% and 20%.
What you are paying for is three things: specialist time, cross-account pattern recognition, and continuity. Specialist time means someone whose entire working day is Google Ads. Cross-account pattern recognition is often more valuable: an agency managing 50 or more accounts across multiple industries sees what Google is rewarding and what is changing far faster than a single in-house team. If bidding behaviour shifts across a whole sector, an agency notices it in week one. An in-house team may not spot it for three months.
Pros of Agency
- Specialist expertise: Agencies live and breathe Google Ads every day across multiple accounts
- Cross-industry insights: What works in one industry often transfers to another
- Tools included: Most agencies absorb the cost of premium tools in their fee
- Continuity: If someone leaves the agency, another specialist picks up your account
- Accountability: Clear reporting and performance benchmarks
Cons of Agency
- Management fees: An additional cost on top of ad spend
- Less business context: Agencies need time to learn your business deeply
- Variable quality: Not all agencies are equal. Some over-promise and under-deliver
- Communication lag: Changes may take 24-48 hours depending on the agency
What Does Google Ads Management Really Cost, In-House Versus Agency?
Business owners often compare agency fees to zero, as if managing Google Ads yourself is free. It is not. Your time has a value. If you spend 10 hours per month managing ads and your time is worth £100 per hour, that is £1,000 per month in hidden cost, often producing worse results than a specialist would.
Not sure where to start?
We help businesses build marketing systems that actually work. Let us show you how.
Get Your Free Growth Plan →A dedicated PPC hire costs £35,000 to £55,000 per year in salary alone, before tools, training, and management time. Most agencies charge £1,000 to £3,000 per month (for more detail, see how much Google Ads management costs in the UK), making them significantly cheaper until your ad spend exceeds £30,000 to £50,000 per month.
There is also the underperformance cost to factor in. A poorly managed £10,000 per month account returning 2x ROAS when a specialist would achieve 4x is leaving £20,000 per month in revenue on the table. That figure does not appear in any fee comparison.
| In-house hire | Agency | Founder-managed | |
|---|---|---|---|
| Monthly direct cost | £3,000-5,000 | £1,000-3,000 | £0 direct |
| Tool costs | £500-2,000 extra | Included | £500-2,000 extra |
| Cross-account data | No | Yes | No |
| Continuity if person leaves | Low | High | N/A |
| Works best at | £30,000+/month spend | £2,000-£30,000/month | Under £2,000/month |
When Does It Make Sense to Manage Google Ads Yourself?
Managing in-house makes sense when your monthly ad spend exceeds £50,000 and you can justify a full-time specialist hire, when you already have an experienced PPC professional on your team whose primary role is managing your campaigns, or when your campaigns are genuinely simple: one product, one location, and one campaign type with minimal ongoing change requirements.
It also makes sense in some B2B and technical sectors where deep product knowledge is the single biggest advantage. If your sales cycle involves specialist terminology and your conversion data lives in a CRM only your team can access, an in-house setup can work well once you have the right person in the seat.
When Should You Hire a Google Ads Agency Instead?
Working with an agency makes sense when your monthly ad spend is between £2,000 and £50,000, when you do not have a PPC specialist on your team and cannot yet justify hiring one full-time, when you want someone accountable for performance rather than just activity, and when your campaigns span multiple campaign types, audiences, or markets that require active, ongoing management.
It also makes sense when you have tried managing in-house and the results are not where you need them. That is the realistic outcome of asking someone without specialist experience to do specialist work, and it happens often enough that we see it regularly when businesses come to us after a year or two of trying to manage it themselves.
What Should You Look for When Choosing a Google Ads Agency?
If you decide an agency is right for you, the choice of which one matters as much as the decision to use one. Look for these things: transparent access to your own Google Ads account (never work with an agency that owns the account data), no long-term lock-in contracts because a confident agency does not need to tie you in for 12 months, reporting that connects ad activity to business revenue rather than vanity metrics like impressions, and direct access to the person managing your account rather than an account manager relaying messages from a specialist you never meet.
Ask them specifically how they handle Performance Max, AI Max for Search, and demand gen. If they give you a flat answer that applies to every account, treat that as a warning sign. The right approach varies by business type, spend level, and target market.
If you want to go deeper before making the call, read our guide on what separates a good Google Ads agency from a costly mistake. Or see our Not sure whether an agency is the right move at all?
Google Ads In-House vs Agency: Frequently Asked Questions
How much does a Google Ads agency charge in the UK?
Most UK agencies charge between £1,000 and £3,000 per month for accounts spending up to £30,000 a month on ads, either as a flat fee or 10 to 20% of ad spend. For a full breakdown of what you should actually pay, see our guide to Google Ads agency fees in the UK. Be cautious about agencies charging under £500 per month: the economics do not support specialist attention at that price point.
Is it cheaper to manage Google Ads yourself?
On paper, yes. In practice, no. A dedicated PPC manager costs £35,000 to £55,000 a year in salary alone, plus tools (£500-2,000 per month) and management time. A good agency covering the same account typically costs £12,000 to £36,000 a year total, and brings a full team rather than one person. Self-management only beats that if the person running the account is genuinely a Google Ads specialist.
How long does it take to see results from a new Google Ads agency?
Expect 60 to 90 days before drawing conclusions. Month one is typically audit and restructure, month two is testing and refining, and month three is when there is enough clean data to evaluate whether the changes are working. Be sceptical of agencies promising significant results in the first two to four weeks: they are selling the pitch rather than managing the reality.
What happens when I switch from in-house to an agency?
Expect an onboarding period of two to four weeks while the agency audits your account, rewrites copy where needed, and adjusts bidding strategies. Performance sometimes dips briefly before improving as the changes take hold. Share your historical conversion data and benchmarks upfront so the agency is not starting blind.
Can I manage Google Ads myself with no experience?
You can. Most businesses that self-manage without specialist experience waste 30 to 40% of their budget on the wrong keywords, match types, or bidding strategies. Google makes it very easy to spend money and quite difficult to spend it well. Below £1,000 a month in ad spend it is a viable learning exercise. Above £2,000 a month, the mistakes get expensive fast. Our Google Ads management service is designed specifically for businesses at that stage.
Ready to Talk?
We manage Google Ads for businesses spending £2,000 to £100,000+ per month. No long-term contracts, transparent reporting, and a focus on leads and sales that actually improve your bottom line. Book a free strategy call to see if we are the right fit.
