Rikard Jonsson
Rikard Jonsson is Founder & CEO of Hey Sid and a five-time entrepreneur with a background in B2B SaaS, sales, and brand building. He believes B2B marketing is overcomplicated and writes about going back to basics: visibility, positioning, and consistent presence among the accounts that matter.
Paid Media Agency vs In-House Team for B2B
Quick answer: Hire a paid media agency when you run three or more channels on under $500,000 of annual spend and have no senior media buyer. Build in-house when spend is concentrated in one or two channels, exceeds roughly $1M a year, and you test weekly. Most B2B teams in 2026 land on a hybrid: in-house strategy and measurement, external execution and creative.
This decision is usually settled by internal politics rather than evidence. Someone wants headcount, or someone wants to cut a retainer. Neither is a reason.
The three things that decide it are simpler:
How much you spend, and how concentrated it is. Fee percentages only bite at scale.
How many channels and formats you run. Breadth favours a paid media agency; depth favours a hire.
Whether you have an internal owner who can act on what the data says. Without one, both models drift.
Quick comparison: paid media agency vs in-house vs hybrid
Criteria | Paid media agency | In-house team | Hybrid model |
Best for | 3+ channels, $100K-$500K annual spend, lean marketing team | 1-2 channels, $1M+ spend, weekly testing cadence | Established programme needing both strategy control and execution capacity |
Typical cost model | Monthly retainer or 10-20% of ad spend | Salary plus tooling plus creative production | Reduced retainer plus one senior internal hire |
Time to live | Weeks | Months, including hiring and ramp | Weeks for execution, months for the internal role |
Channel breadth | Strong: LinkedIn, Meta, search, programmatic, open web | Narrow by design, deepens over time | Strong, with internal prioritisation |
Creative throughput | Built in, usually the biggest single reason to outsource | Constrained unless you fund a designer | Built in, briefed internally |
Institutional knowledge | Leaves with the account team | Stays, unless the specialist leaves | Split, with strategy retained internally |
Sales alignment | Weak by default, needs deliberate wiring | Strong if RevOps is involved | Strongest of the three |
UK GDPR and PECR ownership | Shared, but you remain the controller | Fully internal | Internal policy, external execution |
Measurement honesty | Varies; watch for platform-reported metrics | You choose the metrics | You choose, agency reports into them |
The rest of this guide gives you a decision framework, the real cost stack for both options in USD, the UK compliance points that change the answer, and where each model fails.
What a paid media agency does, and what it does not
A paid media agency buys and manages advertising on your behalf. In B2B that usually means LinkedIn Ads, paid search, Meta, and some form of programmatic display or open-web buying. Most also produce the creative, which is the part teams underestimate.
Typical paid media services included in a B2B retainer:
Media planning and budget allocation across channels and funnel stages
Campaign build and daily management, including bid strategy, pacing and negative keyword or audience exclusion hygiene
Creative production: static, video cutdowns, ad copy variants and landing page recommendations
Audience building: uploaded target account lists, job-title layers, matched audiences
Reporting, usually a monthly deck plus a dashboard
Where agencies are genuinely strong is breadth and throughput. A good team has run LinkedIn Ads across dozens of accounts and knows which formats fail in which niches, which is knowledge you cannot buy with a single hire.
Where they are weak is ownership of everything downstream of the click. Agencies rarely own your CRM, so the connection between an impression and an opportunity stays loose. They also rarely own sales follow-up, which is where most B2B paid media value is created or lost. If your sales team does not know which target accounts have seen your ads, the programme is half-built regardless of how well the campaigns are managed.
The second weakness is incentive shape. A percentage-of-spend model rewards spend, not efficiency. That is not dishonesty, it is arithmetic, and it is why flat retainers tend to age better on long consultative sales cycles.
What an in-house paid media team costs and delivers
An in-house team means the media buying sits on your payroll. For a 20-100 employee B2B company that usually starts as one person: a paid media manager who also handles reporting and briefs a freelance designer.
The real cost stack, in USD, is more than the salary:
Salary and employer costs. A capable mid-level B2B paid media manager in the UK market sits in a broad band; loaded cost is meaningfully above the headline figure once employer contributions and benefits are added.
Tooling. Creative production software, an ad management or reporting layer, and often a data warehouse seat.
Creative production. This is the line item that sinks in-house programmes. Ads decay. If you cannot ship fresh creative every few weeks, performance drifts down and no amount of bid tuning fixes it.
Ramp time. Hiring, notice periods and learning your ICP take months before the first properly informed campaign ships.
Cover risk. One specialist means one holiday, one resignation or one illness pauses the programme.
What you get in return is real. Institutional knowledge compounds. The person managing spend sits in your sales meetings and hears how deals are won. Iteration speed is faster because there is no brief-and-wait cycle. For a single-channel programme with high spend and frequent tests, in-house beats a paid media agency on both cost and quality.
The honest failure mode is the generalist trap. A single hire who is also expected to run email, events and the website will not run paid media well. If the role is not ring-fenced, you are paying a salary for part-time attention.
The Paid Media Ownership Test
Score each factor, then total. This framework was built for this article, and it uses the five variables that predict which model works rather than a feature grid.
Factor | Score 0 (favours agency) | Score 1 (neutral) | Score 2 (favours in-house) |
Annual media spend | Under $250K | $250K-$1M | Over $1M |
Channel concentration | 3+ channels and formats | 2 channels | 1 dominant channel |
Creative throughput needed | 10+ new assets per month, no internal designer | Moderate, some internal capacity | Low volume or a funded in-house studio |
Testing cadence | Monthly or slower | Fortnightly | Weekly structured tests |
Internal owner | Nobody owns paid media | Part of a broader marketing role | Dedicated headcount already approved |
How to read your score:
0-3: hire a paid media agency. You lack the spend to justify a salary and the internal capacity to sustain creative. Buy the breadth.
4-6: hybrid. Keep strategy, budget authority and measurement in-house. Outsource execution and creative. This is where most 20-100 employee B2B companies sit.
7-10: build in-house. Your spend and cadence make external fees expensive relative to the value they add.
Run this with your own numbers before you run it with anyone's benchmarks. The bands above are deliberately broad because a $300K programme across LinkedIn, search and programmatic behaves nothing like a $300K programme sitting entirely in one platform.
Paid media agency vs in-house: criteria comparison
Six criteria decide the outcome in practice. Each is compared below, with a winner named.
Cost and value
Cost is not fee versus salary. It is total cost to a working programme, including creative and tooling.
Cost element | Paid media agency | In-house team |
Management | Retainer or 10-20% of spend | Loaded salary |
Creative | Usually included | Extra: freelancer, designer or agency |
Tooling | Absorbed by the agency | Your line item |
Ramp cost | Low, weeks | High, months of partial output |
Winner: agency below roughly $500K of annual spend. Above that, percentage fees start funding a senior hire and the maths flips.
Speed to launch
Agencies launch in weeks because the skills already exist. In-house builds carry hiring, notice and ramp. The gap is typically a full quarter, which matters if a fiscal year target depends on pipeline this half.
Winner: agency, clearly.
Channel depth versus breadth
A single in-house buyer gets deeply good at one platform. A paid media agency spreads competence across LinkedIn, search, programmatic and open web. If your buying committee sits across several channels, breadth wins. If nearly all qualified pipeline traces back to LinkedIn, depth wins.
Winner: depends on channel concentration. Split.
Measurement and sales alignment
This is where in-house has a structural edge. The person who owns spend can sit with RevOps and agree what counts. Agencies often report platform-reported conversions, which flatter the programme.
Our position is that in B2B, nobody defends a budget with impressions. Value becomes real the moment you can show which target accounts moved closer to a decision. That requires CRM access, which most agency arrangements do not include by default.
Winner: in-house, unless you write CRM access and account-level reporting into the agency scope.
Compliance ownership
Whoever runs the ads, you remain the data controller under UK GDPR. Agencies act as processors and you carry the accountability. In-house teams keep the decision-making closer to your compliance owner.
Winner: in-house on control, agency on execution discipline. Split, and covered in detail below.
Scaling and resilience
Agencies absorb volume spikes and holiday cover without you hiring. In-house teams do not, until you have three or more people. But agencies churn account managers, and each change costs you weeks of context.
Winner: agency for capacity, in-house for continuity.
UK compliance points that change the decision
Verify the UK position first, then check the EEA one if you run pan-European campaigns. The post-Brexit difference usually works in the UK reader's favour.
LinkedIn Conversation Ads and Message Ads. These can target UK members. LinkedIn withdrew EU targeting for these formats in January 2022 following the ePrivacy position on native inbox advertising, and the UK is not covered by that withdrawal. So run them for UK campaigns, and plan alternative formats for EEA audiences. If your agency tells you inbox formats are unavailable, they are describing the EEA position, not yours.
Tag installs and consent. LinkedIn's default Insight Tag snippet fires on page load. That needs consent under UK PECR before it fires, and under EU rules in the EEA. The li_gc cookie records LinkedIn's internal consent state and is not a lawful basis on its own. A consent-first install order is the fix, and it is worth confirming with your compliance owner rather than accepting an agency's default template. The ICO's guidance on cookies and similar technologies is the reference point for UK programmes.
Person-level visitor identification. Effectively a US-only tactic under UK GDPR and EU GDPR alike. If a prospective agency pitches individual website visitor identification for UK or European audiences, treat it as a red flag on their compliance literacy.
Controller responsibility does not transfer. You remain accountable for audience list handling, retention and lawful basis even when the agency does the uploading. Get the data processing terms reviewed. This is a point for your own compliance owner, not something to take from a blog post.
Compliance handling is a fast way to grade an agency during procurement. Ask how they would install a LinkedIn tag on a UK site, and whether Conversation Ads can run in Germany. Answers to those two questions separate specialists from generalists quickly.
Pricing models and hidden costs
Published paid media agency pricing is rare in B2B; most firms quote after a scoping call. What follows are the models in common use, in USD, with a clear line between published and reported figures.
Model | How it works | Typical range (reported, verify on a call) | Watch for |
Monthly retainer | Fixed fee for a defined scope | $4,000-$15,000 per month for mid-market B2B | Scope creep, creative capped per month |
Percentage of ad spend | 10-20% of managed media | Scales with budget | Incentive to increase spend |
Hybrid base plus percentage | Small base fee, lower percentage | Common above $1M spend | Complexity in forecasting |
Project or sprint | Fixed fee for a launch or audit | $10,000-$40,000 | No ongoing optimisation |
In-house build | Salary plus tooling plus creative | Loaded cost well above headline salary | Ramp time, cover risk |
Ranges above are reported market figures, not vendor-published prices, and they vary widely by market and scope. Ask any firm for its own published or written quote and treat aggregator numbers with suspicion; the same vendor frequently appears at different entry prices across comparison sites.
Hidden costs on the agency side: creative revisions beyond an allowance, landing page build, translation for multi-market campaigns, reporting tool licences billed through, and onboarding fees. Also, the cost of your own time managing the relationship, which is rarely zero.
Hidden costs on the in-house side: recruitment fees, tooling you did not budget for, creative freelancers, training and certification, and the productivity cost of the months before the hire is effective. A single in-house paid media manager who needs a designer, a video editor and a reporting layer often costs more in year one than a mid-tier retainer.
The value question to ask is not "which is cheaper" but "which produces more qualified pipeline per dollar of total cost, at our spend level, over 12 months". Model both at your actual budget. The answer moves sharply between $150K and $1.5M of annual spend.
Common mistakes to avoid
Comparing the retainer to a salary. Add creative, tooling and ramp before you compare anything, or you will pick the wrong model on incomplete maths.
Hiring in-house with no ring-fenced remit. A paid media manager who also owns email, events and the website will run none of it well.
Outsourcing without an internal owner. Agencies need someone who can approve creative, answer ICP questions and act on findings. Without that, the retainer buys activity, not outcomes.
Accepting platform-reported conversions as truth. Ask for account-level and CRM-linked reporting in the scope from day one, not as a later upgrade.
Judging paid media on lead volume in month one. Long consultative cycles do not produce clean signal that fast, and short-term metrics make working programmes look broken.
Letting the agency own the audience data. Target account lists, exclusions and suppression logic should live somewhere you control.
Skipping the compliance interview. UK GDPR and PECR knowledge varies enormously between firms, and you carry the accountability either way.
Where Hey Sid fits, and where it does not
Disclosure: this article is published by Hey Sid, so treat this section as positioning rather than neutral review. The rest of the guide holds up whether or not you ever speak to us.
Hey Sid is not a paid media agency and does not compete with one on general media buying. It is a person-targeted ad engine and done-for-you account-based platform for mid-sized B2B companies: both a platform and a service. Three products run against the same named individuals - Always On for individual-level advertising across paid social, display and the open web, Authority Builder for LinkedIn thought leadership, and Precision Connect for LinkedIn network expansion and outreach. We call the compounding effect The Influence Loop, and it works over a 60-90 day window rather than a week.
The relevant difference against agency retainers is scope shape. Rather than managing whatever channels you brief, the model targets a defined list of decision-makers and reports which companies engaged. The two-way HubSpot integration writes ad impressions, clicks and engagement onto existing company records as properties prefixed "Sid", and imports deals read-only each night, so sales can see who has been exposed before the first call. It never edits or deletes a record that already exists in your CRM. Companies and deals can also be pushed from HubSpot back into ad audiences.
Where it is a poor fit, plainly:
Budgets under $25,000 a year. The floor is a service fee plus ad spend with a minimum commitment.
Teams needing pipeline inside six weeks. The model is slow by design; the 60-90 day window is not negotiable.
No defined target account list, CRM or sales process. Account-based marketing is not right for every company. From what we see, it works best for teams that already have a sales process, a clear ICP, and an internal owner who can act on the insights. Teams without a CRM or a defined target list tend to struggle whichever platform they choose.
Companies wanting click-to-close attribution. The reporting shows influenced companies, influenced pipeline and influenced revenue. It is not last-click.
B2C, high-velocity transactional B2B, or marketing-led organisations without a sales team.
If you need broad-market demand capture across search and social, a specialist paid media agency is the better purchase. If your problem is reaching a known list of decision-makers repeatedly, and you do not want to build the team, that is the case we are built for. Enterprise-weighted ABM agencies such as Agent3, The Marketing Practice, Transmission and Momentum ITSMA serve Fortune 500 clients with large in-house marketing teams; that is a different buyer, not a better or worse one.
Ready to see what account-based execution looks like?
If your paid media problem is reaching specific named decision-makers rather than filling the top of a broad funnel, a done-for-you account-based engine may fit better than either a retainer or a new hire.
Or see how it works first.
Conclusion and next steps
The paid media agency versus in-house question resolves on three variables rather than preference: how much you spend, how concentrated that spend is across channels, and whether someone internal can own the programme. Below roughly $500,000 of annual spend across several channels, an agency buys breadth and creative throughput you cannot hire for at that budget. Above $1M in one or two channels with weekly testing, a dedicated internal team is both cheaper and better. In between, the hybrid model wins, with strategy, budget authority and measurement kept in-house and execution bought.
Whatever you choose, wire the programme into your CRM before you scale spend, and grade any partner on UK GDPR and PECR literacy during procurement rather than after signing. Run the Paid Media Ownership Test with your own numbers, then revisit it annually, because spend growth quietly changes the answer.
For channel-level decisions, our guide to B2B paid media channels and platforms covers where budget goes. If your evaluation is heading toward account-based execution, the roundup of account based marketing agencies for B2B and the guide to programmatic advertising platforms for B2B are the next reads, alongside the wider B2B advertising strategy guide. Companion pieces in this cluster cover paid media measurement and creative testing cadence.
FAQ
Is a paid media agency cheaper than hiring in-house?
Below roughly $500,000 of annual ad spend, usually yes, once you include creative production, tooling and the months of ramp before a new hire is effective. Above that level, percentage-of-spend fees start to exceed a loaded senior salary and building internally becomes the cheaper option, provided you can also fund creative.
What should a B2B paid media agency retainer include?
At minimum: media planning, campaign build and management, creative production with a stated monthly allowance, audience and exclusion management, and reporting. Insist on account-level reporting and CRM-linked outcomes in the scope rather than platform-reported conversions. Also agree who owns the ad accounts, pixels and audience lists if the relationship ends.
Can UK companies run LinkedIn Conversation Ads and Message Ads?
Yes. These formats can target UK members. LinkedIn withdrew EU targeting for them in January 2022 and the UK is not covered by that withdrawal, so they remain available for UK campaigns. If you also run EEA audiences, plan alternative formats there. Confirm the current position with LinkedIn's help documentation before launch.
How long before paid media shows results in B2B?
Expect meaningful signal in weeks for search-intent capture and considerably longer for account-based or brand-led programmes with long consultative cycles. Teams that measure account-based programmes on short-term lead metrics almost always come away disappointed, even when the programme is working. Agree the measurement window before launch.
What is the hybrid paid media model?
One senior internal owner holds strategy, budget allocation and measurement, while an external partner handles day-to-day execution and creative production. It keeps institutional knowledge and CRM access in-house while buying throughput and channel breadth. For most 20-100 employee B2B companies, this is the model the Paid Media Ownership Test points to.
Sources
This article introduced the Paid Media Ownership Test framework and built on the first-party insight that account-based marketing works best for teams that already have a sales process, a clear ICP and an internal owner who can act on the insights.
