SDR Turnover: The Hidden Cost of an In-House Team

When companies calculate the cost of an in-house SDR, they usually look at salary, payroll taxes and tools. One cost almost never makes it into the spreadsheet: what happens when that SDR leaves. And in this role, leaving is the norm, not the exception.

According to The Bridge Group’s 2025 report, based on 351 B2B companies, median annual SDR attrition is 40% and average tenure is 1.9 years. On a team of five SDRs, that means two seats will most likely be empty at some point this year. This guide shows what each departure costs, with a worked example and a calculator for your own numbers.

How long SDRs stay in the role

The Bridge Group data has some nuances worth reading carefully:

• Median attrition of 40% a year, ranging from 21% to 57% across most companies.
• Of that 40%, 13% is involuntary, 11% is voluntary and 16% is promotions into other roles.
• Average tenure is 1.9 years, the highest in more than a decade, but still short.

Promotions are good news for the SDR, but for the team the effect is the same: the seat goes empty and you start over. By design, the SDR role is an entry point into a sales career.

The 4 components of turnover cost

1. Recruiting and hiring

Posting the role, screening candidates, interviewing and negotiating. If you use a recruiter, the typical fee is 15% to 25% of annual salary. If you do it in-house, you pay for it in your sales leader’s and HR’s time.

2. The vacancy: pipeline that never gets built

While the seat is empty, you save the salary but stop generating meetings. That gap shows up two or three months later as a weak month for closed deals, when it is too late to fix.

3. A new ramp period

The replacement takes an average of 3 months to reach full productivity (The Bridge Group, 2025). During that time you pay the SDR’s full cost while they deliver, on average, a fraction of the expected output. We cover it in detail in how long it takes a new SDR to become productive.

4. Management time and lost knowledge

The hours your sales leader spends interviewing and training the replacement, plus what walks out the door: ongoing conversations, account context and lessons about which messages work. It is hard to measure, but anyone who has inherited a half-updated CRM knows what it costs.

Worked example: the cost of one departure in Mexico

Take a mid-level SDR in Mexico with a base salary of USD 2,050 per month (the midpoint of the market range) and a total cost of about USD 2,870 including payroll taxes, based on our cost-by-country analysis. Assumptions: 2 months of vacancy, 3 months of ramp at 50% average productivity, and a quota of 10 meetings per month, which is the median in The Bridge Group report.

With 40% attrition on a five-person SDR team, that is two departures a year: USD 16,000 to 21,000 in direct cost and around 70 meetings your sales team will never get. And this is a conservative estimate: Gallup puts the cost of replacing an employee at one-half to two times their annual salary, which for this SDR would be USD 12,300 to 49,200.

Calculate your team’s turnover cost

Change the values to match your team. The defaults reflect the Mexico example.

Why SDRs leave

• Career growth: the role is an entry point, and strong SDRs want to move into an account executive role within a year or two.
• Hard-to-hit quotas: according to The Bridge Group, only 60% of SDRs hit quota, the lowest share in the history of the study. Chasing an impossible number burns people out fast.
• Rejection fatigue: cold prospecting means hearing “no” every day. Without a solid ICP and good data, rejection multiplies.
• Too little coaching: a leader with too many SDRs cannot support each of them.
• Unclear variable pay: if SDRs do not understand how they earn their variable, it stops working as an incentive.

How to reduce turnover if you keep the team in-house

1. An explicit career path: what an SDR must achieve to become an account executive, and on what timeline.
2. Realistic quotas: calibrated with data from your own market, not copied from a US benchmark.
3. Weekly coaching: reviewing calls and messages, not just numbers.
4. Solid data and playbook: an SDR prospecting against a well-defined ICP has more conversations and less frustration.
5. Document everything in the CRM: so the knowledge stays when someone leaves.

How an agency absorbs it

Agencies have turnover too; the difference is who absorbs it. With SDR staff augmentation, if an SDR leaves, the provider replaces them with someone already trained in prospecting, and the playbook, messaging and account history stay in place. Your team does not start from scratch.

Two examples from Siete clients:

• Ozaru added a team with an SDR, a B2B copywriter and a delivery manager, and according to its CEO’s review on Clutch, the augmented team generated 12% more revenue, with 10+ meetings per month with enterprise companies. Read the Ozaru case study.
• Belia Trading went from generating no leads to 8+ qualified meetings per month in Mexico and Peru, without hiring in-house prospectors. Read the Belia Trading case study.

To compare the total cost of both models, see SDR staff augmentation vs. direct hiring, or read how to choose an SDR outsourcing agency.

Let’s talk about how to stop starting from scratch every time someone leaves.

Frequently asked questions

What is a normal SDR turnover rate?

According to The Bridge Group’s 2025 report, median annual SDR attrition is 40%, with a range of 21% to 57%. Average tenure in the role is 1.9 years.

How much does it cost to replace an SDR?

In our Mexico example, each departure costs USD 8,000 to 10,500 in recruiting and ramp time, plus around 35 meetings that never happen. Gallup estimates that replacing an employee costs one-half to two times their annual salary.

How do you calculate SDR turnover cost?

Add the recruiting cost, the SDR cost during ramp that does not turn into output, and the meetings lost during the vacancy and ramp. Multiply by the expected departures per year, which is team size times the attrition rate.

Is there no turnover with an SDR agency?

There is, because it comes with the role. The difference is that the provider absorbs replacement and training, and the playbook and account history remain, so your operation keeps running.

Keep reading: in-house SDR vs. agency

• In-house SDR vs. agency: the real cost by country in LATAM
• SDR ramp time: how long until a new SDR is productive
• SDR outsourcing: how it works and how to choose an agency
• Siete vs. hiring an in-house SDR

Sources: The Bridge Group, 2025 SDR Models, Metrics & Compensation Report (attrition, tenure, ramp, quota and attainment). Gallup, This Fixable Problem Costs U.S. Businesses $1 Trillion (replacement cost). Salaries and payroll taxes: see sources in our cost-by-country analysis.