In our view, for most subscription apps spending less than a mid five-figure sum a month on paid acquisition, a user acquisition agency is cheaper and faster than an in-house UA manager once both are costed for the same scope. A UK UA hire on a hypothetical £65,000 salary costs about £75,300 a year after employer National Insurance and the minimum pension contribution, and that person still needs a creative budget, because a UA manager runs ads rather than making them. In-house wins when spend is large and stable, runs across several channels, and someone at the company can judge UA work. At that point the strongest set-up is often both: an in-house owner of the data and the economics, with a specialist agency for the channel or creative volume the hire cannot cover alone.
The comparison usually goes wrong in one of two ways. Either a salary is set against an agency retainer that includes creative production, which flatters the hire, or an agency fee is set against a full growth team, which flatters the agency. This guide matches the scope first, then compares cost, speed, depth and risk on like-for-like terms. It is about the UA role specifically. If your question is whether to build an in-house creative team, we costed that separately in agency vs in-house creative teams.
Key takeaways
- The UA role is five jobs: channel operation, measurement, creative strategy, creative production and unit economics. Few single hires are strong at all five.
- A UK salary understates the cost of a UA hire by about 16% on statutory on-costs alone, before tools, recruitment and management time.
- Compare options on matched scope. A UA manager plus a creative budget is the fair comparison for an agency that makes the ads.
- An agency wins on speed, creative capacity and flexibility. An in-house hire wins on data access, product proximity and multi-channel ownership at scale.
- If nobody at the company can judge UA work, hiring in-house first is the riskiest option, not the cheapest.
What a user acquisition manager actually does
"UA manager" covers very different jobs at different companies, so start by listing the work rather than the title. At a subscription app running paid social, the user acquisition function breaks into five jobs:
| Job | What it involves | In-house UA manager | UA agency |
|---|---|---|---|
| Channel operation | Account structure, bidding, budgets, optimisation events, daily management on each network. | Core of the role. Depth usually strongest on one or two networks. | Core of the service. Specialists may cover one channel deeply or several more thinly. |
| Measurement and attribution | MMP set-up, iOS attribution, cohort reporting, reconciling network data with revenue data. | Usually owned, and easier with direct access to product and revenue data. | Varies widely. Ask whether reporting is cohort-based or platform-reported. |
| Creative strategy | Deciding which angles, audiences and awareness levels to test, and briefing them. | Often owned, sometimes thinly. Depends on the hire's background. | Strong at creative-led agencies, weak at media-only ones. |
| Creative production | Making the video, UGC and static ads at the rate the account consumes them. | Rarely done by the UA manager. Needs designers, editors, creators or a budget. | Included at some agencies, billed separately or absent at others. |
| Unit economics | Target CAC, payback, budget ceilings, and saying no to spend that does not pay back. | A natural fit. The hire sits next to finance and the product team. | Possible, but only as good as the revenue data you share. |
The row that changes the maths is creative production. In our experience, creative is the main lever left to advertisers on Meta, and a subscription account at meaningful spend consumes new concepts every month. A UA manager can brief that work, and a good one briefs it well, but they do not edit the videos, recruit the creators or design the statics. Whatever you hire, someone has to make the ads, and that cost belongs in the comparison.
Compare the cost of the whole UA function, not the cost of one person. A UA manager without a creative supply is half of what an agency that makes the ads is selling.
What an in-house UA manager really costs in the UK
We could not find a reliable public 2026 salary dataset for the UA manager title in the UK. Aggregator figures mix customer acquisition, talent acquisition and gaming roles, and advertised ranges vary widely with seniority and location. So rather than quote a number we cannot stand behind, the table below runs three illustrative salaries through the two costs every UK employer must pay on top. Use the offers you are actually seeing in your market.
Those two costs are set by GOV.UK. Employer Class 1 National Insurance is 15% on earnings above the £5,000 a year secondary threshold for 2026 to 2027. Workplace pension auto-enrolment requires an employer contribution of at least 3% of qualifying earnings, which in most schemes means earnings between £6,240 and £50,270.
| Salary (illustrative) | Employer NI | Minimum pension | Annual cost | Monthly cost |
|---|---|---|---|---|
| £50,000 | £6,750 | about £1,310 | about £58,060 | about £4,840 |
| £65,000 | £9,000 | about £1,320 | about £75,320 | about £6,280 |
| £80,000 | £11,250 | about £1,320 | about £92,570 | about £7,710 |
That is an uplift of about 16% on the salary, and it is the floor. Many employers pay more than the minimum pension. Eligible employers can claim Employment Allowance, which GOV.UK sets at £10,500 for 2026 to 2027, and that can absorb much of the National Insurance on an early-stage company's first hires. Check whether you qualify, because it narrows the gap at small headcounts.
Then add what never appears on a payslip: an MMP and analytics seats, recruitment fees if you use a recruiter, the months between deciding to hire and the person running campaigns confidently, cover for holidays and illness, and the time someone senior spends directing and judging the work. None of those has a standard figure, so price them for your own company rather than ignoring them.
What a UA agency costs, and what the fee covers
Agency fees come as retainers, percentages of spend, or hybrids, and the bigger difference is scope. A media-only agency's fee buys channel operation and reporting, and you fund the creative yourself. A creative-led agency's fee may include strategy and production. We compared the models and the hidden extras in our guide to mobile app user acquisition agency pricing.
For reference, our own published pricing starts from £1,500 a month for accounts spending up to £20,000, and from £3,250 a month up to £75,000, with creative strategy, production, Meta campaign management and monthly reporting included. That is one agency's pricing on one channel, not a market rate, and it does not include app store optimisation or lifecycle marketing, which we do not offer.
A worked comparison: one app, three ways to run UA
Take a hypothetical subscription app spending £15,000 a month, mostly on Meta. It needs campaigns run, cohorts read and around four new creative concepts a month. All figures are illustrative, not client data. Option A hires a UA manager at £65,000 and buys creative from freelancers and creators for an assumed £3,500 a month. Option C hires a more junior growth marketer at £50,000 to own data and economics, and keeps a specialist agency for Meta and creative.
| Option | Monthly cost | What it covers | What it misses |
|---|---|---|---|
| A. In-house UA manager, creative bought in | about £9,780 a month | All five jobs, if the hire is strong at strategy and you fund production. Covers every channel you run. | Tools, recruitment, management time and holiday cover are not in the figure. One person, one point of failure. |
| B. Agency running Meta and making the creative | A single retainer, quoted for your spend and scope | Channel operation, creative strategy and production, reporting. Live quickly. | Unit economics only as good as the data you share. Other channels, ASO and lifecycle not covered unless the agency offers them. |
| C. In-house growth lead plus a specialist agency | about £4,840 a month plus the agency retainer | In-house owns data, economics and the other channels; agency supplies Meta depth and creative volume. | Costs more than B. Works only if the in-house lead is the single decision maker. |
Option A costs about £9,780 a month before tools, recruitment and management time, which is roughly 65% of the media budget it runs. At this spend, most agency quotes that include creative will come in below that. The gap closes as spend grows, because the salary stays flat while percentage fees and spend-banded retainers rise. It also closes when the hire runs several channels, because one salary then replaces several agency fees.
Cost is not the deciding factor in either direction. Option A buys things B cannot: someone in the room when the product team changes the paywall, direct access to revenue data, and ownership of every channel. Option B buys things A cannot: a working team in weeks, creative capacity that does not depend on one person, and the ability to scale down with notice if paid acquisition stops working.
In-house UA vs agency across eight dimensions
| Dimension | In-house UA manager | UA agency | Usually favours |
|---|---|---|---|
| Salary and on-costs | Fixed. Salary plus about 16% statutory on-costs, before tools and recruitment. | Variable. Retainer, percentage of spend or hybrid. Can be cut with notice. | Agency at low or uncertain spend; in-house at high, stable, multi-channel spend. |
| Experience | Deep in your app. Pattern recognition from the hire's previous roles. | Pattern recognition across many current accounts, shared across many clients. | Depends on the people, not the model. Interview both. |
| Creative production | Not covered by the role itself. Needs a team, freelancers or a budget. | Covered by creative-led agencies, not by media-only ones. | Creative-led agency, unless you already have an in-house creative team. |
| Channel depth | One person rarely has deep expertise in more than two networks. | Specialists go deep on one channel; full-service agencies go wider. | Specialist agency for one dominant channel; in-house lead for a broad mix. |
| Attribution | Direct access to MMP, subscription and finance data. | Needs access granted, and reconciliation can lag. | In-house, provided the hire can actually set it up. |
| Management overhead | Hiring, one-to-ones, objectives, holiday cover, and judging the work. | A weekly call and a monthly review, but you still have to judge the work. | Agency, unless someone senior already manages growth. |
| Speed | Recruitment plus notice plus ramp-up, usually measured in months. | Weeks. Our own first creative round goes live within 10 days. | Agency. |
| Institutional knowledge | Stays in the building while the person does. | Stays with the agency unless you insist on owning the test log and files. | In-house, but only if it is written down either way. |
Channel depth vs channel breadth
The networks behave differently enough that depth on one rarely transfers fully to another. A single UA hire tends to be very good on one or two networks and competent on the rest. That suits an app whose spend is spread evenly across several networks, where the job is allocation between them. It suits less well an app where one network carries most of the spend, because that network rewards the depth a specialist sees across many accounts at once.
Attribution and data access
This is the in-house hire's strongest card. Reading subscription cohorts properly means reconciling network data with your MMP and your subscription platform, and an employee can sit inside all three. An agency can do the same work, but only with the access you grant, and some agencies still report what the platform reports. Whichever you choose, make sure the business owns the ad accounts, the MMP and the data, as we set out in our guide to switching mobile app marketing agencies.
Management overhead: you cannot manage what you cannot judge
The most expensive in-house mistake we see is not the salary. It is a founder with no UA background hiring their first UA manager, who cannot tell a confident report from a correct one. A weak hire reporting install volume and platform ROAS can run for months before the cohort data catches up with them. An agency carries the same risk, but an agency can be replaced with notice, while a mis-hire costs a notice period, a recruitment cycle and the months already lost. If you cannot yet judge the work, the scorecard in our guide to auditing a mobile app marketing agency works just as well on an employee.
Speed to the first readable test
An in-house hire starts after recruitment and any notice period, then spends weeks learning the app before the first well-briefed test. An agency with a production team can usually have creative live within a few weeks; on our Meta Ads service the first creative round goes live within 10 days. Neither model shortens how long a subscription cohort takes to mature, which is why our guide to the first 90 days with an agency treats the first month as baseline rather than results.
Institutional knowledge
An employee keeps what they learn about your users in the building, until they leave. An agency keeps it in its own systems, until you part ways. The fix is the same for both: a written test log of every concept, the hypothesis behind it and the cohort result, kept in a place the business owns. Knowledge that lives in one person's head is a risk whichever payroll they are on.
When an in-house UA manager is the right call
- Paid acquisition is a permanent, core channel, and spend is large and stable enough that a flat salary beats fees that rise with it.
- Spend runs across several networks and the hard problem is allocating budget between them, not going deeper on one.
- UA decisions depend on tight, daily contact with product, pricing and paywall changes.
- You already have creative capacity in-house, so the hire is not left briefing work nobody can make.
- Someone senior can recruit, manage and judge a UA specialist.
When a UA agency is the right call
- Spend is under the level where a full UA salary plus creative is a sensible share of the budget.
- One channel carries most of the spend and creative supply is the constraint, as it usually is on Meta.
- You need tests running within weeks, not after a hiring cycle.
- Paid acquisition is still being proven, so you want a cost you can scale down with notice. Our guide to when to hire a Meta Ads agency sets out the conditions that should be true first.
- Nobody internally can yet judge UA work well enough to hire for it.
There is a third answer for very small budgets: neither. Below the spend where any outside fee makes sense, a founder or a freelance media buyer running a narrow set of tests is often better value. Our guide to how much ad spend an app needs before hiring an agency covers where that line sits.
The hybrid: an in-house owner with outside execution
Past a certain size, the question stops being either or. The set-up we see working most often gives the in-house lead everything that needs to live inside the company: the accounts, the data, the budget, the target CAC, and allocation across channels. A specialist partner supplies what one person cannot, usually creative volume and depth on the channel that carries the most spend. The in-house lead then judges the partner on cohort results rather than on activity.
The hybrid fails in one predictable way: two owners of the strategy. If the agency optimises against its own reporting while the in-house lead works from a different source of truth, every review becomes an argument about whose numbers are right. Agree up front who decides, which data settles disputes, and how the target CAC is set, and the hybrid is usually stronger than either option alone.
Four questions that settle the decision
- Can anyone here judge UA work? If no, start external and hire later, once there is a track record to manage.
- Is the constraint creative or allocation? Creative supply points to an agency that makes ads. Allocation across many channels points to an in-house lead.
- What does the full function cost each way? Salary plus on-costs plus creative plus tools, against quotes for the same scope.
- How permanent is paid acquisition? A fixed cost suits a channel you are sure of. A variable one suits a channel you are still proving.
Where we fit
We are a Meta and performance creative agency for mobile apps, so we fit option B, and the agency half of option C. Plenty of our clients keep in-house creative and bring us in for media and creative supplementation, and we show their team what is working at the ad level so it can be applied elsewhere. We do not run app store optimisation or lifecycle marketing, and an app whose main need is a broad multi-channel UA lead should hire one. Our Steps & Beasts case study shows the combined model at work: a published 1112% revenue increase and 118% more active subscriptions, credited to heavy creative testing alongside onboarding changes. You can see how we work with consumer and subscription apps, and if Meta and creative are your bottleneck, you can apply to work with us. For how UA fits the rest of the funnel, start with our subscription app marketing strategy guide.
Frequently asked questions
Is it cheaper to hire a UA manager or a user acquisition agency?
Below roughly mid five-figure monthly ad spend, an agency is usually cheaper once both sides are costed for the same scope. A UK UA manager on a hypothetical £65,000 salary costs about £75,300 a year after employer National Insurance and the minimum pension contribution, roughly £6,300 a month, and that person does not make the ads. Add a creative production budget and the in-house option often costs more than an agency fee that includes creative. In-house gets cheaper as spend grows across several channels, because a salary does not rise with spend.
What does a user acquisition manager do at a mobile app?
The role usually spans five jobs: running campaigns on each channel, measurement and attribution, creative strategy and briefing, creative production, and connecting spend to the app's unit economics such as target CAC and payback. Most single hires are strong at two or three of these. Creative production is the job a UA manager most often cannot do alone.
When should a mobile app hire its first in-house UA manager?
When paid acquisition is a core, ongoing growth channel, spend runs across more than one network, and someone at the company can judge UA work well enough to hire and manage the person. If nobody internally can tell a good UA manager from a confident one, an agency or experienced consultant is the lower-risk first step, and the in-house hire can follow once the account has a track record to manage.
Can an in-house UA manager work with an agency?
Yes, and at scale it is often the strongest set-up. The in-house lead owns the accounts, the data, the budget and the economics across channels, while a specialist agency supplies something the lead cannot, usually creative volume or depth on one channel such as Meta. It works when the in-house lead is the single decision maker and fails when both sides think they own the strategy.
How long does it take to replace a UA agency with an in-house hire?
Allow for recruitment, any notice period the candidate must serve, and a ramp-up period before the new hire is reading cohorts confidently. Plan the overlap so the agency hands over account access, the test log and the creative library before it stops, and make sure your business already owns the ad accounts, pixel or SDK data and MMP access so nothing has to be transferred in a hurry.
The short version
Price the whole UA function, not one salary: on-costs, creative, tools and the time it takes to judge the work. On that basis an agency usually wins below mid five-figure monthly spend, on a single dominant channel, or when nobody internally can manage a UA hire. An in-house lead wins at large, stable, multi-channel spend where data access and product proximity matter most. Many apps that reach that point end up with both, and do well with it as long as one person owns the decisions.