A founder we worked with, call him Rohan, spent four months hiring an SDR before he asked us anything. Job posting, forty interviews, a signing bonus, a laptop, a CRM seat. By the time the guy actually booked his first real meeting, Rohan had spent close to six thousand dollars and it was month three.
That's the part nobody tells you when they say "just hire an SDR, it's cheaper long-term." It might be. But cheaper long-term doesn't help you if you run out of runway before long-term arrives.
The lead generation agency vs in-house SDR question isn't really about which one is objectively better, it's about which one matches your deal size, your sales cycle, and how much cash you can burn while you wait for either option to work.
What An SDR Actually Costs, Fully Loaded
The salary number on a job posting is never the real number.
Add recruiting, tools, management time, and the ramp period where they produce close to nothing, and the fully-loaded cost usually runs 1.4x to 1.8x the base salary.
Here's roughly where that lands by market:
United States: base salary $55,000 to $75,000, fully loaded $85,000 to $130,000 a year once you add a Sales Navigator seat, an outbound tool like Apollo or Outreach, a CRM license, and a slice of a sales manager's time.
United Kingdom: base salary £28,000 to £38,000, fully loaded £45,000 to £62,000.
India: base salary ₹4 lakh to ₹8 lakh, fully loaded ₹7 lakh to ₹13 lakh, mostly because tool costs don't scale down the way salary does.
Tools alone add up fast. A decent outbound stack (email sending domain, a verification tool, a sequencing platform, Sales Navigator, maybe a dialer) runs $300 to $800 a month per rep in the US, less in India but not by as much as you'd expect since most of these tools are priced in dollars globally.
Then there's ramp time. Most SDRs need two to three months before they're producing qualified meetings at a steady rate. They're learning your product, your ICP, your objection handling, and your CRM in that window. You're paying full salary for partial output.
Some founders shorten this by hiring someone with prior SDR experience in an adjacent industry. It helps, but it doesn't eliminate the ramp, it just moves it from month three to month two.
And there's turnover. SDR roles have some of the highest churn in any sales function, often 25 to 35% annually. If your SDR leaves at month ten, you're back to hiring, and the twelve months of institutional knowledge about your ICP walks out the door with them.
What A Lead Generation Agency Actually Costs
Business lead generation companies price in a few common structures, and it's worth knowing all three before you sign anything.
Flat retainer. Most agencies land between $2,500 and $8,000 a month depending on the volume of outbound and the complexity of your ICP. A tightly defined niche B2B target costs less to work than "any VP at a company with 50 to 5,000 employees."
Retainer plus performance kicker. Base retainer around $2,000 to $4,000, plus a bonus per qualified meeting booked, typically $100 to $400 per meeting depending on deal size. This aligns incentive better but agencies price the base higher to protect against a slow month.
Pure pay-per-lead. Rare for genuine B2B lead generation because lead quality is nearly impossible to price fairly upfront, but you'll see it in simpler, high-volume categories.
The pitch for an agency is speed. A good lead generation agency already has the tooling, the deliverability infrastructure, the copywriting templates, and playbooks from other clients in adjacent spaces. They can often start sending in week one and have meetings booked by week three or four.
What you give up is company-specific depth. An agency team member handles ten to twenty accounts at once. They know your one-liner and your ICP filters, but they don't sit in your Slack, they don't know the deal that fell through last quarter because of a pricing objection nobody wrote down anywhere.
Rohan's version of this, once he'd burned through the SDR hiring process, was a nine-person agency retainer running $3,200 a month. Meetings booked jumped from zero to fourteen in the first six weeks, mostly because the agency already had a working cold email sequence for his exact category from a prior client.
He didn't have to write it from scratch or test five subject lines before finding one that opened.
That kind of head start is the real value an established lead generation company brings. It isn't magic, it's just accumulated pattern-matching across dozens of accounts that look roughly like yours.
Results also vary more than people expect. A b2b lead generation agency working a well-defined niche with a clear value prop can hit 15 to 25 qualified meetings a month. The same agency working a vague ICP with a confusing offer might land five.
Ask any lead generation company for meeting numbers from a comparable client before you sign, and skip the generic case study PDF.
The Ramp-time Tradeoff, Laid Out Plainly
This is the actual crux of the decision, more than the raw dollar figures.
An SDR takes two to three months to become productive, but once they're productive, the marginal cost of each additional meeting drops because you already paid the fixed salary. Six months in, an SDR who's dialed in on your ICP can often outproduce an agency on cost per meeting, because there's no agency margin sitting on top.
An agency starts faster, usually within two to four weeks, but the cost per meeting stays roughly flat over time since you're paying a margin on every cycle, not just the setup.
Do the math over twelve months and the crossover point usually sits around month five or six for a US-based hire, later for an India-based one where the salary gap versus agency retainer is wider.
Before that point, the agency almost always wins on total meetings booked. After it, a well-ramped SDR usually wins on cost efficiency, assuming they don't leave.
There's a middle path a lot of founders miss: run the agency for the first two quarters to generate revenue while you hire. Then bring the SDR role in-house once you have a validated ICP and messaging the new hire can inherit instead of discovering from scratch.
That's a version of what we walk clients through when they ask us to compare a demand generation agency vs lead generation agency structure. The two aren't interchangeable, and the sequencing matters as much as the pricing.
A Decision Rule Based On Deal Size And Sales Cycle
Skip the vibes and use two numbers you already have: average deal size and sales cycle length.
Deal size under $10,000 and sales cycle under 30 days. Go with an agency. The unit economics need volume more than depth, and an agency's existing infrastructure gets you volume faster than a hire ever will.
Deal size $10,000 to $50,000, sales cycle 30 to 90 days. This is the genuine toss-up zone. Lean agency if you need revenue in the next quarter. Lean in-house if you have six-plus months of runway and a founder who can coach an SDR through the ramp personally.
Deal size over $50,000, sales cycle over 90 days. Go in-house, or hire a senior AE-SDR hybrid instead of a junior SDR. Complex, high-value sales cycles need someone who understands your product deeply enough to handle nuanced objections, and that's hard to outsource to a shared agency resource covering ten other accounts.
One more variable overrides all of this. If you don't yet have a repeatable, validated message, an agency is the faster way to test five angles across a few hundred prospects and find out which one lands.
That's cheaper than committing a full-time salary to executing an unproven script. We've seen founders skip this step entirely, wrapped up in a broader b2b marketing funnel with no budget approach that tries to do everything at once instead of validating the message first.
A Founder Who Ran Both
One founder we advised ran both experiments back to back. His first SDR hire cost about $6,800 a month fully loaded and booked four qualified meetings in the first quarter, most of them after month two.
The agency he tried next cost $4,500 a month and booked seven meetings in the same window, though roughly a third were off-profile and needed a second filter call. Neither result was a disaster, and neither was a clear win on its own.
The real lesson came from the follow-up. His close rate on SDR-sourced meetings was nearly double, because the SDR knew the product cold, so the cheaper meeting was not the cheaper customer.
Takeaways
Fully-loaded SDR cost runs 1.4x to 1.8x base salary once tools, ramp time, and management overhead are counted.
SDRs need two to three months to ramp; agencies can usually start producing meetings within two to four weeks.
The cost crossover point sits around month five or six for a US hire, later for other markets.
Under $10,000 deal size and short sales cycles favor an agency; over $50,000 and long cycles favor an in-house hire.
If your message isn't validated yet, test it through an agency before committing to a full-time salary.
If you want a second opinion on which side of that line your business sits on, our linkedin lead generation playbook covers the channel-specific version of this same tradeoff, and you can book a 30-minute call if you'd rather just talk through your numbers directly.