What does a first marketing hire really cost in the UK?

The true year-one cost of a £45,000 marketing hire is roughly £67,500, about 50% above the salary. Here is where the extra £22,500 comes from.

Employer National Insurance: £6,000. Employers pay NI at 15% on earnings above the £5,000 secondary threshold (HMRC, 2025/26). On a £45,000 salary that is £6,000 a year before the employee has opened a laptop. This is the line founders most often forget, and it got materially worse when the rate rose from 13.8% and the threshold dropped from £9,100 in April 2025.

Pension: £1,163. Auto-enrolment requires a minimum 3% employer contribution on qualifying earnings between £6,240 and £50,270 (The Pensions Regulator). Most companies competing for decent marketers pay more than the minimum; we have modelled the floor.

Recruitment: £8,100. Recruitment agency fees for marketing roles typically run 15-20% of first-year salary; we model 18%. Recruit directly and you avoid the fee but pay in weeks of founder time, which is rarely cheaper. Either way, if the hire does not work out, and first marketing hires fail often because the role is under-specified, you pay this line twice.

Tools, training and kit: £7,200. One marketer needs a software stack (an SEO platform alone runs £100-400 a month), a training budget, and a laptop with setup. We model £4,200 for tools, £1,500 for training and £1,500 for kit in year one.

Add it up: £45,000 + £6,000 + £1,163 + £8,100 + £7,200 = £67,463 in year one, with roughly £58,000 of that recurring in year two.

The two costs that never appear on a payslip

The cash is only half the comparison. Two structural costs decide more outcomes than any line above.

Ramp time. A new hire needs to learn your product, your buyers and your category before producing pipeline. For B2B SaaS, with its domain-knowledge demands, three to six months is normal. Model four months and your £67,500 buys about eight productive months in year one, which pushes the effective monthly cost of productive work towards £8,400: more than most specialist retainers.

The channel maths. This is the bigger one. A growth-stage SaaS company typically needs three to five channels running together: SEO, AI search visibility, paid media, content, and the website itself. One person cannot specialise in all of them; a good generalist runs two properly. So the honest comparison is not “hire vs agency” for the same output. It is one to two channels for £67,500 against every channel you scoped for the retainer. The most common outcome we see is the £45,000 hire arriving, auditing the workload, and recommending agencies for the channels they cannot cover, which is how companies end up paying for both without having planned to.

What the agency retainer buys, and what it doesn’t

A £5,000 monthly retainer is £60,000 a year. What it buys, at a specialist worth the name: senior people in each channel rather than one generalist across all of them, output from week one rather than month four, no recruitment fee, no ramp, and no payroll risk if it does not work out; notice periods on retainers are shorter than settlement conversations.

What it does not buy, and where in-house wins: someone in your stand-ups absorbing product context daily, someone who owns the brand voice from inside, and someone whose whole week belongs to you. An agency that claims to replace all of that is overselling. There is also a floor below which retainers stop working: under roughly £1,200 per channel per month, nobody can do proper work, and an agency that takes five channels on a £3,000 retainer is planning to do all of them badly. We decline that shape of engagement, and you should treat any agency that accepts it as a warning sign.

The hybrid: what most companies actually end up doing

The strongest structure for most growth-stage SaaS companies is neither pure option. It is a marketing hire who owns strategy, brand and internal context, plus a specialist retainer covering the channel depth no single person can hold. In the model above that is roughly £67,500 for the hire plus a reduced retainer of around £3,000 a month: about £103,500 a year for full channel coverage with in-house ownership.

That is more money than either option alone, which is why it is a stage decision rather than a default. Companies usually grow into it: retainer first while the founder still owns strategy, first hire once there is enough pipeline to manage, hybrid from there. Running the sequence backwards, hiring first and then discovering the channel gaps, is the expensive order.

When hiring is genuinely the right answer

An honest comparison has to include the cases where you should not sign a retainer, and there are three common ones.

If you need one channel done well, hire or contract a specialist in that channel. A retainer’s value is integration across channels; for a single channel it is overhead. If your budget is under about £3,000 a month, a retainer spreads too thin across any real scope: narrow to the two channels that matter most, use a freelancer, or wait until the budget matches the ambition. And if your motion is fully product-led with contract values under roughly £5,000, the economics of any consultancy retainer are hard to justify; your money is better spent in the product and its loops.

The calculator above encodes all three of these as verdicts, because a comparison tool that always concludes “hire the agency” is a sales page with sliders.

How to use these numbers

Three practical steps. First, run your own figures through the calculator with the salary you would genuinely offer and the channels you genuinely need this year, not the aspirational list. Second, whichever route you take, define the role or the retainer against channels and pipeline targets, not activities; “own SEO and paid, deliver X qualified demos a quarter by month nine” is a specification, “manage our marketing” is a future disappointment.

Third, if the maths lands on agency or hybrid, hold the agency to the same standard you would hold the hire: named channels, pipeline targets, and reporting that follows leads through to revenue. Our guide to B2B SaaS marketing covers what that reporting should look like, and if you are comparing specialists, our honest breakdown of the best B2B SaaS marketing agencies includes the competition.

Link: The definitive guide to B2B SaaS marketing

Link: The best B2B SaaS marketing agencies

Link: Demand generation vs performance marketing

FAQs: in-house marketing vs agency costs

Q: How much does a marketing hire cost a UK company beyond salary?A: Plan for 40-55% on top of salary in year one. On £45,000 that means roughly £67,500 once employer National Insurance at 15% (HMRC, 2025/26), the 3% minimum pension contribution, a typical 18% recruitment fee, software, training and kit are included. Around £58,000 of it recurs annually.

Q: Is a marketing agency cheaper than hiring in-house?A: At typical growth-stage scope, yes on a per-channel basis: a £5,000 monthly retainer covering four channels costs £1,250 per channel per month, while a £67,500 hire covering two channels costs about £2,800. In-house wins on context, ownership and availability, which is why many companies end up with a hybrid.

Q: When should a SaaS company hire in-house instead of using an agency?A: Hire first when you need one channel done deeply, when budget is under roughly £3,000 a month, or when your motion is product-led with low contract values. Hire alongside an agency once there is enough pipeline to manage and strategy needs a full-time internal owner.

Q: What does a good agency retainer cost for B2B SaaS?A: Budget from roughly £1,200 per channel per month as the floor for proper work; £3,000-£15,000 a month covers most growth-stage scopes depending on channel count and depth. Below the floor, scope has to shrink. Any agency happy to run five channels on £3,000 is planning to run them badly.

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