THE TRUE COST OF HIRING AN IN-HOUSE SDR IN THE UK (2026)

Miles Chapman
2 days ago
11 min read

When a GTM leader decides they need more pipeline, scaling outbound is usually the natural next move. And for most companies doing it for the first time, that means hiring an SDR.

The budget then gets built around a salary, because the salary is the number everybody can see. It's on the job ad. Finance recognises it. It goes into the plan, the plan gets approved, and the role opens.

But a salary is one line of what an in-house SDR costs you. National Insurance is another. So is the seat they sit at, the data they work from, the tools they need to do the job, the fee you pay to find them, the time somebody has to spend managing them, and the months that pass before any of it turns into a booked meeting. Those costs arrive separately, from different suppliers, and half of them land in a budget that isn't yours, which is why they so rarely get added together.

Added up, the true cost of hiring an SDR in-house in the UK is a long way from the number on the job ad. Here's every line of it, at 2026 rates.

The short version

The true cost of hiring an SDR in-house in the UK is 2.3 to 2.5 times base salary. A London hire advertised at £42,000 costs £99,871 in year one.
Across the salary band, year one runs at 2.3 to 2.5 times base salary.
Roughly four of the first twelve months produce learning rather than meetings.
Average UK tenure is 14 to 22 months, well short of what most plans assume.
Cost isn't the deciding factor. What you're taking on is.

What's Actually in the Calculation

The person — base salary, and the on-target variable that sits on top of it
The cost of employing them — employer National Insurance, auto-enrolment pension, and whatever benefits package you offer
Finding them — recruitment fees, or the internal hours that replace them
The seat — desk space, and the kit they sit at it with
Data and technology — contact data, CRM, sending infrastructure, deliverability, and whatever else the rep needs to do the job
Management — the weekly coaching that decides whether any of the above works

And two multipliers that sit outside the table entirely, and move the answer further than any single line in it: how long they take to ramp, and how long they stay.

The Salary Line Is the Easy Bit

UK SDR base salaries in 2026 sit between £28,000 and £45,000, and where you land depends mostly on geography and experience. RepVue's UK data puts the median base at £41,228, with median on-target earnings of £62,739. Glassdoor's broader sample, which sweeps in a lot of very junior roles, comes out lower at around £39,700. London adds a fairly consistent premium of 15 to 20% on base.

The standard structure is a 70/30 split, so on-target variable works out at roughly 43% of base on top.

RepVue's data suggests 57.9% of UK SDRs hit quota in a given twelve months. Just over half.

Employer National Insurance Has Changed and Most Budgets Haven't

This is the line we see wrong most often, and it's wrong by thousands.

From April 2025, employer National Insurance moved from 13.8% to 15%. The part that actually hurts is the second change: the secondary threshold at which you start paying dropped from £9,100 to £5,000. Both changes carried into 2026/27 unchanged. There's an Employment Allowance of up to £10,500 that can offset it, but if you already employ a handful of people you've almost certainly absorbed that elsewhere, so for a marginal hire it usually isn't available.

Worth checking: If you're a smaller business that hasn't claimed Employment Allowance, this is the one line on the page you may be able to remove entirely. Check before you budget.

The sum. (Total earnings − £5,000) × 15%, and it's charged on the variable as well as the base. So the better they do, the more it costs you.

Pension. Less dramatic but not nothing. A minimum 3% employer contribution on qualifying earnings, which for 2026/27 is the slice of pay between £6,240 and £50,270.

Benefits, if you offer them. Private medical for a younger employee runs £45 to £75 a month for mid-tier cover. Add group life assurance and income protection and a typical package lands between £1,000 and £1,500 a year.

Before you go further, check your own model. Half the SDR budgets we see are still built on 13.8% and a £9,100 threshold, and that single error is worth well over £2,000 a year on its own.

"Half the SDR budgets we see are still built on 13.8% and a £9,100 threshold. That single error is worth well over £2,000 a year on its own."

Finding Them Costs More Than People Remember

UK recruitment agencies charge between 15% and 25% of first-year salary, with sales roles typically at 17.5% to 20%. The fee is usually payable within 30 days of the candidate starting, and the rebate period of eight to twelve weeks expires long before you know whether the hire is working.

You can hire direct, and plenty of companies do. The cost doesn't disappear, it just changes shape into somebody's time. Writing the spec, screening a hundred CVs, running four rounds of interviews. If your Head of Sales spends fifteen hours on a hire, you've spent the money. You've just spent it somewhere nobody's counting.

Hiring SDRs is its own skill. Getting it wrong doesn't cost you the fee. It costs you the fee, the ramp, and two quarters - how confident are you of picking the right person?

The Seat Itself

Easy to forget, because it's usually somebody else's budget line.

London desk space runs £6,000 to £12,000 a year once rent, rates, utilities and facilities are counted, against £3,000 to £6,000 in regional offices. If your team is hybrid, allocate around 60% of it. Add a laptop, headset and second monitor at £500 to £1,500. Software is a separate problem, and a bigger one.

Data and Technology

You have to set your SDR up to succeed, and it's no longer a case of handing them a laptop and a target and away they go. They need data, a list, a way to reach it, and somewhere to record what happened.

Depending on how you run outbound, a single seat needs some combination of:

Contact data and verified direct dials
LinkedIn Sales Navigator
A CRM licence
A sequencing or engagement platform
Sending domains, inboxes, warm-up and deliverability monitoring
A dialler, if they're calling at any volume
Call recording, if you want to coach from it

You might have all of it. You might have some of it. You can't have none of it.

Equipped properly for UK outbound, one seat runs somewhere between £4,000 and £8,000 a year before the rep has spoken to a single person.

It is noticeably worse when it is your first hired, compared to your tenth. Most of these tools are priced on the assumption they'll be shared, so annual commitments and minimum seat counts mean one user pays close to full price. And the cheaper end of the data market is noticeably weaker on UK and European mobile numbers than on US ones, so the budget option tends to cost you connect rate rather than money.

Deliverability is the line most often skipped and the one that hurts longest. A well-written email that lands in spam is worse than no email at all, because it damages your sender reputation and makes every subsequent email less likely to arrive.

Management Is the Biggest Hidden Line

An SDR needs a manager. Not someone who runs a Monday standup. Someone who reviews recorded calls, rewrites sequences, sits in on discovery and gives feedback on real work every week.

Bridge Group's data ties quota attainment more tightly to manager tenure and coaching frequency, meaning three or more calls reviewed a week, than to almost anything else. The same person also ends up writing the ICP the rep works from, rebuilding the messaging when the founder's warm pitch doesn't land on strangers, and designing the handover process between the SDR and whoever takes the meeting. None of that generates an invoice. It generates a quarter where somebody senior sold less.

What that's worth.

Realistically it's a day a week for the first six months. A UK Sales Development Manager sits around £65,000 base, so roughly £80,000 fully loaded, and a day a week for half a year is 10% of that.

If you don't have that person, the job lands on you. And you aren't cheap. Ten to twenty per cent of a founder's time is the most expensive line on this page, and it's the one that never appears on it.

So What Does It Actually Come To?

Three versions of the same hire, all London-based, so the only thing changing is seniority. This is the true cost of hiring an SDR in-house in the UK, assuming a 70/30 split, a 20% agency fee, hybrid working, and a stack that supports phone outreach.

Element	Junior	Mid-level	Experienced
Base salary	£35,000	£42,000	£48,000
Variable at 100% quota	£15,000	£18,000	£20,571
Employer NI	£6,750	£8,250	£9,536
Pension	£1,313	£1,321	£1,321
Benefits package	£1,200	£1,400	£1,600
Recruitment fee	£7,000	£8,400	£9,600
Workspace	£5,000	£5,000	£5,000
Equipment and onboarding	£1,500	£1,500	£1,500
Data, tooling and deliverability	£6,000	£6,000	£6,000
Management and coaching	£8,000	£8,000	£8,000
Total year one	£86,763	£99,871	£111,128

Hiring outside London, knock roughly 15 to 20% off the salary lines and a couple of thousand off the desk. The shape doesn't change.

Because what stays constant is the multiplier. Across the whole band, the first year costs roughly 2.3 to 2.5 times the base salary. Hire at £38,000 and you're spending about £92,000. Hire at £45,000 and you're spending about £106,000.

If you take one number away from this, take that one. Whatever the job ad says, roughly double it and add a quarter.

"Whatever the job ad says, roughly double it and add a quarter."

Now Apply Ramp and Churn

Two things sit outside that table and change what you actually get for the money.

The first is ramp. Bridge Group and Alba Talent's benchmarks put it anywhere from three to six months depending on the complexity of the sale. For a complex UK deal, three to five is realistic, and you only hit the short end if a manager, a playbook and a data source are already in place. Most first hires don't have those so it takes around four months. That leaves eight productive months carrying the whole year's spend:

Junior: £86,763 ÷ 8 = £10,845 a month
Mid-level: £99,871 ÷ 8 = £12,484 a month
Experienced: £111,128 ÷ 8 = £13,891 a month

That treats the ramp months as producing nothing, which isn't quite true. A rep three months in is usually booking something, just not at quota. So read those figures as the ceiling rather than the average, and shorten the ramp in your own model if you think you can beat four months.

The second is how long they stay. Reported UK averages land between 14 and 22 months, well short of the two to three years most plans assume. At the lower end, you pay the recruitment fee and sit through the ramp again before the second year is out.

Put those together and you aren't buying twelve months of pipeline. You're buying eight, and then betting on getting a second year out of them.

"You aren't buying twelve months of pipeline. You're buying eight, and then betting on getting a second year out of them."

So What Are the Alternatives?

Hiring is one route to more pipeline. There are two others worth taking seriously.

The first is to push outbound onto the AEs you already have. It costs nothing on paper, which is why it gets tried so often, and it fails for reasons that are fairly predictable.

Prospecting and closing are different jobs, and when a quarter is on the line the closing one wins every time. Cold outreach is the first thing dropped and the last thing picked back up, so it happens in bursts. Two good weeks in January, nothing in February, a scramble in March.

The problem is that outbound punishes you on a delay. The month your AEs stop prospecting is not the month you feel it. You feel it eight or twelve weeks later, and if you're selling something with a six-month cycle, later still. By then nobody connects the empty pipeline to the quiet fortnight that caused it, so the diagnosis lands on the market, or the messaging, or the product.

What you get is lumpy. Lumpy activity produces lumpy pipeline, which produces lumpy quarters, and a strong quarter followed by a weak one is usually the same behaviour showing up twice with a lag between.

"The month your AEs stop prospecting is not the month you feel it."

There's a cost angle too. Your most expensive people end up doing your most junior work, at an hourly rate that makes an SDR salary look like good value. And because it's nobody's actual job, there's nobody to hold accountable when it produces nothing.

The second is to outsource the function to a company that does this and nothing else. That's the real comparison, and it's the one we have an obvious stake in, so here's the honest version of it.

Outsourced sales development starts at around £6,000 a month for one dedicated resource, and climbs from there depending on scope, seniority and how much of the engine comes with it. Annualised, that's £72,000 and up.

In-house in London, fully loaded, is £87,000 to £111,000. So the entry point for outsourcing sits below the cheapest version of hiring, not above it, which is the opposite of how the two get compared. There's a timing difference too: an outsourced team is usually producing at two to three months rather than three to five, because that ramp isn't spent building infrastructure, it's spent learning your market.

To be honest though, cost isn't really the thing that should be measured here at all. What matters is what you're taking on.

When you build in-house you aren't buying an SDR. You're buying the job of making one successful: the recruitment, the training, the data sourcing, the messaging, the handover process, and the course correcting when the first two months produce nothing. It's specialised work, and it lands on whoever has least time to spare.

When you outsource, you pay a premium for the fact that all of it already exists. The ecosystem, the process, the management layer, the data. You're not buying a person, you're buying the removal of that burden and the ability to start producing sooner.

So the money lands in roughly the same place either way. The real question is who does the building - you, or someone who's already done it.

Four Questions Worth Answering Honestly

Before you commit either way, these are the ones we'd ask on a call. They tend to be the ones that decide it.

1. What experience do you have training an SDR from scratch? Not managing a salesperson. Teaching someone to open a cold conversation with a stranger and hand it over cleanly.

2. Where is the data coming from? Specifically. Which provider, at what seat cost, with what UK mobile coverage, and who maintains it when it decays.

3. What have you built before in the way of lead flow and handover? What happens between a booked meeting and a qualified opportunity is where most outbound programmes quietly leak.

4. How have you recruited for this role before? And how confident are you of picking the right person first time, given that getting it wrong costs the fee, the ramp and two quarters.

If you have good answers to all four, build. You'll do it well and you'll own the capability.

If you don't, the honest reading is that you don't have a hiring problem. You have a capacity problem, and hiring is the slowest available way to fix it.

When Hiring In-House Genuinely Wins

Three situations, and they're real.

If a useful conversation with your buyer requires six months of domain knowledge, an embedded hire will eventually outperform anyone external. Deeply technical products, regulated markets, anywhere credibility is earned slowly. Build.

If you already have a sales manager with genuine capacity, the management line largely disappears and the economics shift meaningfully towards in-house.

And if you're building a permanent function, meaning five SDRs in eighteen months and a proper SDR-to-AE career path, hire the first one now and accept that you're paying tuition on them.

Work Out Your Own Number

No two teams are the same, so the columns above almost certainly aren't yours. Have a play with the numbers and see where you land.

Sources

RepVue UK Sales Development Representative salary data (July 2026) · HMRC National Insurance rates and thresholds 2026/27 · The Pensions Regulator, qualifying earnings band 2026/27 · The Bridge Group SDR Metrics reports · Alba Talent SDR Benchmarks 2026 · SHRM Human Capital Benchmarking Report · UK workspace and benefits benchmarks, 2026

Figures assume a London-based hire, a 70/30 base-to-variable split, a 20% agency fee, hybrid working, and a single-seat stack supporting UK phone outreach. Outside London, reduce salary lines by 15 to 20%.

Written by a human. Tightened up with AI.