An SDR, or sales development representative, is the person who turns interest into a booked meeting. In most companies the SDR works inbound: demo requests, content downloads, webinar attendees, trial sign-ups and campaign replies. They qualify the person, confirm there is a real problem and a real budget holder, and hand a calendar invite to an account executive. They do not close. The measure of a good SDR is how much of the demand you already paid to create actually reaches a sales conversation.

A BDR, or business development representative, starts conversations that nobody asked for. They build or inherit a list of target accounts, find the right people inside them, and open with cold email, LinkedIn or the phone. Everything an SDR gets handed, a BDR has to manufacture: the account, the contact, the reason to care and the timing. The measure of a good BDR is pipeline created from accounts that had no prior relationship with you at all.

What is the difference between an SDR and a BDR?

Direction. An SDR answers demand, a BDR creates it. Everything else follows from that: the SDR is measured on speed and coverage of existing inbound, the BDR on accounts opened from a cold list. Be aware that the industry does not use these titles consistently. Plenty of companies call everyone an SDR, some call everyone a BDR, and a few use BDR for partnerships rather than outbound. When you read a job spec or an agency proposal, ignore the title and ask one question: where does the first conversation start?

What is the difference between an SDR, a BDR and an AE?

SDRs and BDRs both book meetings and hand them on. The account executive, or AE, owns the meeting from that point forward: discovery, demo, proposal, negotiation and close. The clean split is that development reps are measured on meetings and pipeline created, while the AE is measured on revenue closed. In a company under roughly $1M ARR the founder is usually the AE, and that is the correct arrangement rather than a gap to be filled.

Should my first sales hire be an SDR or a BDR?

Often neither. If you have real inbound volume, an SDR on fast follow-up pays back quickest because the attention has already been bought. If you have no inbound, a BDR is the right shape of role, but only once you can hand them a defined ICP and a message that has already produced replies. A first BDR asked to discover the ICP, write the message, build the list and hit a meeting quota in their first quarter is being set up to fail, and you will lose two quarters finding out.

How much does an SDR cost?

As a market estimate, an in-house SDR or BDR costs roughly $5,500 to $8,500 per month fully loaded once you count salary, payroll costs, data, tooling, management time and three to six months of ramp before they produce. Over twelve months that is about $66,000 to $102,000. That number, not the base salary, is the one to compare against alternatives. Done-for-you agencies sit at $1,500 to $5,000 or more per month as a market range, and software alone runs about $50 to $150 per seat per month. Figures reviewed September 2026. We scope and quote each engagement after a free audit rather than publishing a rate card.

Role comparison

SDR vs BDR: which one you need

Short answer

An SDR normally answers demand that already exists: inbound demo requests, downloads and replies. A BDR normally creates demand from cold, starting conversations with accounts that have never heard of you. Both book meetings and hand them to an account executive, who owns the deal from there. The titles are used inconsistently across the industry, so ignore them and ask two questions instead: where does the first conversation start, and who owns the meeting once it is booked. If you have no inbound and no proven message yet, the honest answer is that you should hire neither one this quarter.

Written by WeeGrow. Cost figures on this page are market estimates, not a WeeGrow price list and not a salary survey, and were last reviewed in September 2026. We publish no rate card: every engagement is scoped and quoted after a free audit.

At a glance

SDRBDR

Conversation starts: Inbound, usuallyCold, always
Measured on: Meetings from demandAccounts opened cold
Owns the meeting: No, hands to an AENo, hands to an AE
Fully loaded per month: $5,500 to $8,500Same band, upper half

Both roles sit in one band, because what separates them is the direction of the conversation, not the seniority. A BDR tends to land in the upper half of it, since the list and the data have to be bought rather than handed over. The full band is roughly $66,000 to $102,000 a year. Market estimate, last reviewed September 2026.

the part other pages leave out

“The two titles do not mean the same thing at any two companies.”

Some firms call every rep an SDR, some call every rep a BDR, and a few use BDR for partnerships rather than outbound at all. Read the job spec or the proposal, never the acronym.

01Side by side

Five ways to get a meeting booked, and what each one really costs

Most pages on this query swap two definitions and stop. That is not the decision you are actually making. You are choosing between five structures, and two of them are not hires at all. Read the last column first: knowing when a role is premature will save you more money than picking the right acronym ever will.

Role	Where the conversation starts	What they are measured on	Fully loaded cost	When it is premature
SDR, sales development rep	Usually inbound. Someone downloaded something, requested a demo, sat through a webinar or replied to a campaign, and the SDR follows up fast.	Qualified meetings from demand that already exists, speed to first touch, and what share of inbound gets worked at all rather than ageing in a queue.	$5,500 to $8,500 per month fully loaded as a market estimate, or roughly $66,000 to $102,000 a year, once salary, payroll costs, tools, data, management time and three to six months of ramp are counted.	Premature until inbound is steady enough to keep one person busy for a full week. Our rule of thumb, not a published figure: if marketing or the founder can still clear the week's hand-raisers in an afternoon, a salary is the expensive way to do it.
BDR, business development rep	Always cold. The BDR chooses the accounts, finds the right people inside them and starts a conversation nobody asked for.	Meetings booked from a named target list, accounts touched per week, and pipeline created from accounts with no prior relationship at all.	The same band, $5,500 to $8,500 per month fully loaded as a market estimate, or roughly $66,000 to $102,000 a year. A BDR usually lands in the upper half of it, because the list and the data have to be bought and built rather than handed over.	Premature without a defined ICP and a message that has already earned replies. A first BDR hired to discover both at once usually fails.
AE, account executive	Does not start conversations in a healthy team. Picks the meeting up once it is booked and owns it from discovery to signature.	Closed revenue, win rate, average deal size and sales cycle length. Never activity.	A base salary plus commission against a quota, so the total moves with what they close. The $5,500 to $8,500 band used on this page is a development rep estimate and does not carry across to an AE.	Premature while the founder is still the most credible person in the room, which at early stage is almost always true.
The founder, doing it personally	Both. Warm network first, then cold into a narrow list the founder picked by hand and can defend.	Whether the message works. The real output is a repeatable pitch and a written ICP, not a meeting count.	No new headcount. Tooling runs roughly $50 to $150 per seat per month as a market estimate, plus the founder's time, which is the expensive part nobody books.	Never premature. This is the default until the ICP and the message are written down and have been proven on real conversations.
An external team running the function	Cold, plus inbound follow-up when you want it. The team arrives trained, tooled and with the data stack already paid for.	Whatever the contract says, which is why it matters. The honest version is meetings the founder or AE agrees afterwards were worth taking.	Done-for-you agencies sit at $1,500 to $5,000 or more per month as a market range. We scope and quote after a free audit rather than publishing a rate card.	Premature if nobody internally can take the meetings, or if you still cannot say in one sentence who you sell to.

Cost figures are market estimates, last reviewed September 2026, and are not sourced from a salary survey or from any named employer. At twelve months, the fully loaded band works out at $66,000 to $102,000 a year for one development rep, before anyone has closed anything. The full method behind the fully loaded number is on our B2B lead generation cost breakdown.

Question one: where does it start?

Inbound follow-up and cold outbound are different jobs with different skills. Inbound rewards speed, consistency and a calm qualifying conversation, because the person already raised a hand. Cold rewards research, writing and a tolerance for silence. People who are excellent at one are frequently mediocre at the other, and the most common hiring mistake we see is putting an inbound-shaped person on a cold list and calling the result a motivation problem.

Question two: who owns the meeting?

Neither role should. The point of splitting development from closing is that the closer never prospects and the prospector never negotiates. If the same person books and closes, you do not have an SDR or a BDR, you have a full-cycle rep, which is a different hire with a different profile and a different pay packet. Decide this before you write the job spec, because it changes who you should be interviewing.

02The decision rule

Which one to hire, by stage and deal size

The right answer is set by two things: how much demand already reaches you, and how much a single deal is worth. Find your row. If two rows apply, take the more conservative one, because the cost of hiring a quarter too early is far higher than the cost of hiring a quarter too late.

Where you are	Typical deal size	What to do	Why
Pre-revenue to your first ten customers	Any	Hire neither. The founder sells.	You cannot delegate a message that has never been written down, and the first ten conversations are how it gets written.
Under $1M ARR, little or no inbound	Under $10k	Hire neither yet. Test the motion first, and buy it as a service before you buy it as a salary.	One hire on an unproven motion is a single point of failure with a three to six month ramp attached to it.
$1M to $5M ARR, inbound genuinely arriving	$10k to $50k	One SDR, pointed at inbound follow-up only.	Working demand that already exists has the fastest payback of anything in this table. The hard part, getting attention, is already done.
$1M to $5M ARR, no inbound worth working	$10k to $50k	One BDR, but only if the ICP and the message are already proven.	Cold outbound is a volume and iteration game. One unproven rep will not get through enough of either to find what works.
Named accounts, enterprise motion	$50k and up	A small outbound team or an external partner, with the founder still on the first call.	Few accounts, high value. Research quality beats activity volume, and at this size the founder is still the credibility in the room.
Any stage, no defined ICP or tested message	Any	Hire nobody. Fix the input.	Every role above is downstream of knowing who you sell to and what makes them reply. Headcount does not generate that answer, it consumes it.

If you want to put your own numbers against this rather than take ours, the ROI calculator works out how many meetings a month a given spend needs to produce before it pays for itself. Run it at both ends of the fully loaded range before you approve a requisition.

03The uncomfortable part

A single first hire usually fails, and it is not their fault

Two published benchmarks are worth holding in your head. Expandi reported a LinkedIn connection acceptance rate of 28.5% across 13,218,869 requests, and separately reports acceptance running from 17.5% to 40.1% depending on the industry being contacted, a breakdown Expandi publishes without a sample size. On reply rates, Belkins reported 7.2% across 15.1 million contacts and Expandi reported 10.4% across 6,730,447 messages, both counted as replies per message sent.

Those figures come from different datasets with different denominators, so do not multiply them together to build a funnel. Take one thing from them instead: there is no single baseline to plan against. The headline figure is 28.5%, while the industry breakdown from the same publisher runs from 17.5% to 40.1%, so the number you lift from a benchmark post tells you very little about what your own market will do. Which end of that range you sit nearer is something you find out by running the channel, not something you can assume before you set a quota.

Now look at what a first development hire is normally asked to do. Define the ICP. Build the list. Write the message. Test it. Handle the replies. Book a quota of meetings. All of it alone, in their first quarter, while still learning the product. You are asking one junior person to work out where your market actually sits and what it responds to, and you are paying a fully loaded $5,500 to $8,500 a month as a market estimate, around $66,000 to $102,000 over a year, for the privilege of finding out whether they can.

This is the argument for testing the motion before you hire for it. Once you know which segment replies, which opening line earns a response and how many touches it takes across LinkedIn and cold email, the hire becomes a straightforward operator role with a playbook to follow. Before you know those things, the same hire is an expensive research project with a quota attached.

Three ways to de-risk it

01Write the ICP down in one sentence and show it to three customers. If they do not recognise themselves in it, you are not ready to hire.
02Prove the message on a small list before it becomes anyone's quota. You are looking for replies that argue with you, not just polite noes.
03Decide who takes the meeting before you book the first one. A calendar full of meetings nobody can run is worse than an empty one.

Benchmarks above name the publisher, and the sample size wherever the publisher reported one. Three of them do: 13,218,869 requests, 15.1 million contacts and 6,730,447 messages. The 17.5% to 40.1% industry range is published without one, and we have left that gap showing rather than fill it with a number nobody can check. It is the spread between industries, not a comparison between individual senders. We publish no WeeGrow performance statistics that we cannot evidence.

04Honest fit

We would rather you picked right than picked us

Hire in-house if

You already have a proven ICP, a tested message and inbound worth following up
Someone in the business has run development reps before and can coach one
You want the capability permanently inside the company, not rented
You can carry three to six months of ramp without panicking in month two

Work with us if

You are still proving which segment and which message actually earn replies
You want the motion built with your team, not hidden behind a black box
You need meetings qualified before they reach a calendar you care about
You want to own the data, domains and sequences that get built along the way

Where we are the wrong answer

Your buyers are not reachable on LinkedIn, email or the phone. Field trades, walk-in retail and some public sector buying simply do not work this way.
You want someone to close for you as well as book. We are done with you, not done for you: your team or your founder still runs the sales conversation.
You want a published rate card today. We quote after a free audit, and if that is a dealbreaker, a productized agency with public pricing is a better fit.
Your motion is already proven and you just want more volume at the lowest possible unit cost. At that point an in-house team is usually the better economics.

If you decide the function is worth running but the first hire is not worth the risk yet, an embedded development team is the structure that sits between doing it yourself and carrying a salary. If what you actually need is someone to keep a founder's diary full while the founder keeps closing, that is appointment setting, which is a narrower and cheaper brief than a full development function.

05FAQ

SDR vs BDR, answered

An SDR, or sales development representative, is the person who turns interest into a booked meeting. In most companies the SDR works inbound: demo requests, content downloads, webinar attendees, trial sign-ups and campaign replies. They qualify the person, confirm there is a real problem and a real budget holder, and hand a calendar invite to an account executive. They do not close. The measure of a good SDR is how much of the demand you already paid to create actually reaches a sales conversation.
A BDR, or business development representative, starts conversations that nobody asked for. They build or inherit a list of target accounts, find the right people inside them, and open with cold email, LinkedIn or the phone. Everything an SDR gets handed, a BDR has to manufacture: the account, the contact, the reason to care and the timing. The measure of a good BDR is pipeline created from accounts that had no prior relationship with you at all.
Direction. An SDR answers demand, a BDR creates it. Everything else follows from that: the SDR is measured on speed and coverage of existing inbound, the BDR on accounts opened from a cold list. Be aware that the industry does not use these titles consistently. Plenty of companies call everyone an SDR, some call everyone a BDR, and a few use BDR for partnerships rather than outbound. When you read a job spec or an agency proposal, ignore the title and ask one question: where does the first conversation start?
SDRs and BDRs both book meetings and hand them on. The account executive, or AE, owns the meeting from that point forward: discovery, demo, proposal, negotiation and close. The clean split is that development reps are measured on meetings and pipeline created, while the AE is measured on revenue closed. In a company under roughly $1M ARR the founder is usually the AE, and that is the correct arrangement rather than a gap to be filled.
Often neither. If you have real inbound volume, an SDR on fast follow-up pays back quickest because the attention has already been bought. If you have no inbound, a BDR is the right shape of role, but only once you can hand them a defined ICP and a message that has already produced replies. A first BDR asked to discover the ICP, write the message, build the list and hit a meeting quota in their first quarter is being set up to fail, and you will lose two quarters finding out.
As a market estimate, an in-house SDR or BDR costs roughly $5,500 to $8,500 per month fully loaded once you count salary, payroll costs, data, tooling, management time and three to six months of ramp before they produce. Over twelve months that is about $66,000 to $102,000. That number, not the base salary, is the one to compare against alternatives. Done-for-you agencies sit at $1,500 to $5,000 or more per month as a market range, and software alone runs about $50 to $150 per seat per month. Figures reviewed September 2026. We scope and quote each engagement after a free audit rather than publishing a rate card.