Should You Hire a Marketing Manager or Outsource Marketing?
- Jul 8
- 8 min read
Suhani Chaudhry, Marketing Executive
TL;DR
The marketing manager vs agency question comes down to what your business actually needs: depth or breadth. A marketing manager gives you one dedicated person with deep company knowledge, costing roughly £45,000 to £72,000 a year in the UK before tools, media spend and overheads. When you outsource marketing to a full service marketing agency, a similar budget buys a multi-disciplinary team covering strategy, creative, paid media, content and CRM. Hire in-house when one channel needs daily ownership and deep product knowledge. Outsource marketing when your needs span many disciplines, workload is variable, or you need senior expertise without senior salaries. Most scaling businesses land on a hybrid: a lean internal team that owns the brand, with an agency partner like Magnetic providing the firepower.
Introduction
At some point, every growing business faces the same fork in the road: should you hire a marketing manager, or outsource marketing to an agency? Both options solve the same surface problem, which is that marketing is not getting done. But underneath, they solve it in completely different ways, with different costs, risks and ceilings.
It is also a decision loaded with bias. Recruiters will tell you to hire. Agencies will tell you to outsource. We will be upfront: Magnetic is a full-service creative agency, so you can guess where our bread is buttered. But we have also spent years working alongside in-house marketing managers and teams, and we know exactly where each model wins. This guide gives you the honest comparison, the real numbers and a framework for choosing.
What Does a Marketing Manager Actually Do?
A marketing manager is your in-house owner of the marketing function. Typical marketing manager responsibilities include planning campaigns, managing channels such as social, email and paid media, briefing freelancers or agencies, reporting on performance and keeping marketing aligned with sales.
The strengths of the in-house route are real:
Deep context. They live inside your business, absorb your product roadmap and hear customer conversations first-hand.
Constant availability. They are in the room for every pivot, launch and fire drill.
Accumulated knowledge. Over time they become the institutional memory of what worked, what failed and why.
The limitation is just as real: one person cannot be a strategist, copywriter, designer, media buyer, SEO specialist and data analyst at once. Modern marketing spans more disciplines than any individual can master, so a solo marketing manager either does everything to a generalist standard or quietly drops the channels they are weakest in.
What Does It Mean to Outsource Marketing?
When you outsource marketing, you hand part or all of your marketing function to an external partner. That spans several models:
A full service marketing agency. One partner covering strategy, brand, creative, digital and campaign management. This is how Magnetic works with clients.
Specialist outsourced marketing services. Outsourced digital marketing, outsourced content marketing or outsourced lead generation, bought as individual capabilities.
A fractional CMO. Senior marketing leadership for a few days a month, usually paired with internal or agency execution.
Outsourcing has moved from cost-cutting tactic to mainstream growth strategy. Deloitte's research found that 80% of executives plan to maintain or increase their investment in outsourcing, and half of executives now outsource front-office functions such as sales and marketing, work that once stayed strictly in-house.
The appeal is structural. An agency gives you a whole team's breadth, senior oversight and battle-tested processes from day one, with no recruitment lag, no training curve and no single point of failure when someone goes on holiday.
Marketing Manager vs Agency: The Real Cost Comparison
Let us put numbers on the table, because this decision usually lives or dies on budget.
The cost of hiring a marketing manager: Glassdoor data puts the average UK marketing manager salary at around £44,500, with experienced hires reaching £62,000 or more. In London startups, self-reported data suggests the average runs higher still, at roughly £72,000. Then add the costs the job ad never mentions: employer National Insurance and pension (roughly 13 to 15% on top), recruitment fees (15 to 25% of salary if you use a recruiter), software and tools, training, and three to six months of ramp-up time before full productivity. A £50,000 hire realistically costs £65,000 to £75,000 in year one, before they spend a penny on actual marketing.
The cost of outsourcing marketing: Agency retainers vary widely by scope, but the structural difference matters more than any single figure: the same £65,000 to £75,000 deployed with an agency buys access to strategists, designers, copywriters, media buyers and account leadership simultaneously, switched on from week one. You pay for outputs and outcomes, not for desk time, holidays or quiet months.
Neither option is automatically cheaper. The question is which buys more of what your business needs right now: one person's depth, or a team's breadth.
When Hiring a Marketing Manager Is the Right Call
In-house wins in specific, recognisable situations. Hire a marketing manager when:
One channel drives your growth and needs daily attention. If your business lives or dies by, say, email and community, a dedicated owner beats any retainer.
Product knowledge is the marketing. In deeply technical or regulated sectors, the learning curve for outsiders may be genuinely steep.
You have constant, predictable workload. Enough recurring work to fill 40 hours a week, every week, justifies a salary.
You need an internal coordinator. Once you use multiple freelancers or agencies, someone in-house should own the relationships and the strategy. Agencies do their best work when briefed well.
Culture and speed demand a seat in the room. Some businesses iterate so fast that external partners genuinely cannot keep pace without an internal anchor.
When You Should Outsource Marketing Instead
Outsourcing wins in a different set of situations, and they describe most startups and scaling businesses we meet. Outsource marketing when:
Your needs span many disciplines at partial volume. You need brand strategy, a website, content, paid media and design, but none of them is a full-time job on its own. This is the single most common reason startups choose agency-based startup marketing support.
You need senior expertise without senior salaries. A strategy director, creative director and media lead would cost £250,000+ in combined salaries. An agency gives you slices of all three.
Workload is spiky. Launches, campaigns, seasonal pushes and rebrands need surge capacity that a fixed headcount cannot flex to match.
Speed matters. An agency starts delivering in weeks. A hiring process takes three to six months, and a bad hire costs you the salary plus another six months.
You want a proven customer acquisition strategy, not experiments funded by your payroll. Agencies bring pattern recognition from dozens of clients; an individual hire brings the experience of their last one or two jobs.
This is precisely the model Rüya London chose. Rather than building an in-house team, the high-end Anatolian restaurant group hands Magnetic its entire digital function: paid search, paid social, organic social and CRM, all under one roof. They get an outsourced marketing department with the breadth of five specialists, and their leadership stays focused on running an exceptional restaurant.
The Hybrid Model: Why It Is Rarely Either-Or
Here is the secret the binary framing hides: the best-performing setups we see combine both.
A lean internal lead, whether a marketing manager, a founder or a fractional CMO, owns strategy, brand guardianship and internal alignment. An agency partner supplies the execution muscle: creative production, campaign management, specialist channels and surge capacity.
Even the world's biggest marketing organisations work this way. When Meta needed its 2023 Ramadan campaign delivered across five markets, with assets culturally tuned for Istanbul, Riyadh, Dubai, Beirut and Cairo, its in-house teams did not absorb the spike. They partnered with Magnetic to deliver it. If a company with Meta's resources buys specialist breadth rather than building it, a fifty-person scale-up should feel no shame doing the same.
The hybrid model also de-risks your hiring sequence. Start with an agency, learn which channels actually drive growth, then hire in-house owners for the proven ones. We explore this decision-making process in more detail in our guide to choosing between a marketing manager and outsourced marketing support.
How to Choose a Marketing Agency If You Decide to Outsource
If you go the outsourcing route, choose your partner deliberately. Four tests worth applying:
Breadth with accountability. A genuine full service marketing agency should cover strategy through execution, with one team accountable for results rather than a loose network of subcontractors.
Evidence over promises. Ask for case studies in situations like yours: similar stage, similar challenge, not just similar industry.
Chemistry and candour. You want a partner who pushes back. At Magnetic, transparency is one of our pillars of brand guardianship, because polite agencies that never challenge a brief deliver polite, forgettable work.
A commercial mindset. The right agency talks about your customer acquisition strategy and revenue, not just impressions and engagement.
And whichever way you lean, avoid the worst of both worlds: hiring a junior marketing manager and expecting agency-level breadth, or hiring an agency and giving them no internal point of contact. Both setups fail predictably.
Conclusion: Match the Model to the Problem
So, should you hire a marketing manager or outsource marketing? Hire when one channel needs a full-time owner with deep product knowledge. Outsource when you need many capabilities, senior judgment and speed without the overhead. And if you are like most scaling businesses, build towards the hybrid: a small internal core that knows the business, amplified by an agency that brings the breadth no single hire ever could.
Magnetic acts as exactly that partner. As a full-service creative agency with offices in London and Istanbul, we deliver brand strategy, digital design, marketing and experiential campaigns for clients from ambitious scale-ups to global brands, working with the energy of an in-house team and the range of a whole department.
Weighing up your options? Contact us for an honest conversation about which model fits your stage, including the times the answer is a hire, not us.
FAQs
Should a startup hire a marketing manager or an agency first?
Most startups get more value from outsourcing first. Early-stage needs span strategy, brand, web, content and paid media at partial volume, which suits an agency's breadth. Once one or two channels prove themselves and generate full-time workload, hire an in-house owner for them.
How much does it cost to outsource marketing in the UK?
Costs vary by scope, from a few thousand pounds a month for a focused retainer to considerably more for a full outsourced marketing department. As a benchmark, compare any quote against the true cost of an in-house hire, roughly £65,000 to £75,000 in year one for a mid-level marketing manager once employment costs, recruitment and tools are included.
What are the pros and cons of outsourcing marketing?
The pros: breadth of specialist skills, senior oversight, speed to start, flexibility to scale up or down, and no recruitment risk. The cons: less day-to-day immersion in your business, potential communication overhead, and dependence on choosing the right partner. A clear brief and a strong internal point of contact mitigate most of the cons.
What is the difference between a fractional CMO and an agency?
A fractional CMO provides senior strategic leadership for a few days a month but does not execute. An agency provides both strategy and execution across disciplines. The two often work well together: the fractional CMO sets direction internally while the agency delivers the work.
When should a business bring outsourced marketing back in-house?
Bring a channel in-house when it has proven, predictable, full-time workload and benefits from deep product immersion. Many businesses keep brand, creative and specialist channels with an agency permanently while owning day-to-day channels like email and community internally.
What does a full service marketing agency actually include?
A genuine full service marketing agency covers strategy, brand identity, design, web, content, paid and organic digital media, CRM and campaign management under one accountable team. Magnetic, for example, runs everything from brand creation for scale-ups to multi-market campaigns for global brands across its London and Istanbul offices.
See how we've helped brands like yours
See how we redesigned Rüya's marketing strategy and socials for it's presence in the Mayfair restaurants market.
See how we developed a marketing strategy plan for the iconic London Pub through a campaign ecosystem .
