Some of the most expensive sales hiring mistakes start with a sentence that sounds completely reasonable:
“I have a really good feeling about this candidate.”
I’ve heard versions of it from experienced sales leaders for years.
They know their business.
They know their customers.
They know what a strong salesperson should be capable of doing.

And yet, when they sit across from a candidate they like, something changes.
Confidence starts looking like competence.
Familiarity starts looking like fit.

A great conversation starts looking like proof of future sales performance.

That is one of the reasons I chose cognitive bias in sales hiring as the topic for my 11th year speaking at HubSpot’s annual event, UNBOUND26.

Because bad hiring decisions are rarely made by stupid people.
They are made by human beings.
And human brains use shortcuts.

If your team is tired of guessing who will succeed in a sales role:

Watch What a Failed Sales Hire Costs You and see where hiring mistakes really show up in revenue, ramp time, management resources, and team performance.

Your Brain Is Trying to Help You

Cognitive biases are mental shortcuts that help us process enormous amounts of information quickly.
Most of the time, we need them.
Imagine having to consciously analyze every piece of information you encounter before making a decision. You would never get anything done.
The problem comes when those shortcuts begin influencing decisions where the consequences are expensive.
Sales hiring is one of those decisions.
A candidate walks into an interview.
Within minutes, you notice things.
They communicate well.
They worked for a company you recognize.
Their career path looks familiar.
Maybe they remind you of a top performer already on your team.
You start forming a picture.
And from that point forward, you may unintentionally begin looking for information that confirms it.

Affinity Bias: “They Remind Me of…”

Affinity bias is one of the easiest hiring biases to recognize once you know what you're looking for.
We naturally feel more comfortable with people who seem familiar to us.
They may share our background, personality, interests, experience or communication style.
That familiarity can make an interview feel effortless.
But an effortless conversation is not necessarily evidence that someone can prospect consistently, recover from rejection, ask difficult questions, discuss money, build trust with buyers or execute your sales process under pressure.
Before calling someone a “great fit,” ask:
What evidence am I actually using?
What requirement of this role does that evidence predict?
Would I evaluate another candidate by the same standard?

Those questions create just enough distance between the feeling and the decision.

Confirmation Bias: Once We Decide, We Start Proving Ourselves Right

Now imagine that the first 10 minutes of an interview go exceptionally well.
You think:
“This could be the one.”
From there, confirmation bias can take over.
We begin noticing information that supports our initial conclusion and discounting information that challenges it.
A weak answer becomes something we can coach.
A missing competency becomes something they'll pick up.
A red flag becomes an exception.

This is why hiring criteria need to exist before you fall in love with a candidate.
If your definition of success changes depending on who is sitting across from you, you don't have a hiring benchmark.
You have a moving target.

Confidence Can Be Especially Dangerous in Sales Hiring

Sales interviews present another problem.
You're interviewing people whose profession requires them to communicate, persuade, build rapport and make a compelling case.

Some candidates are extremely good at interviewing.
That doesn't automatically make them extremely good at selling in your environment.
Someone can give polished answers and still struggle when they have to prospect into resistant accounts.
Someone can be charismatic and lack coachability.
Someone can have years of sales experience and still lack the mindset or skills required for your particular sales motion.

The interview needs to uncover evidence of future behavior, not reward whoever gives the best performance in the room.

Watch this video for more:

Structure Makes It Harder for Bias to Drive the Decision

One of the most useful ways to reduce subjectivity is to add structure before candidates enter the interview.

The U.S. Office of Personnel Management describes structured interviews as using standardized questions, defined evaluation criteria and consistent scoring across candidates.
Research summarized by OPM has found that higher levels of interview structure are associated with greater validity, rater reliability and agreement among interviewers.

The reason makes sense.

When every candidate is answering different questions and every interviewer is deciding what “good” looks like in the moment, there is a lot of room for personal interpretation.

When candidates are evaluated against the same job-related criteria, there is less room for “I just liked this one better” to carry the decision.

For sales organizations, I recommend starting with three tools.

1. Build an Ideal Seller Profile

Before writing the job description or interviewing candidates, define the person who can realistically succeed in this role.
What skills are required?
What behaviors?
What sales DNA?
What level of coachability and adaptability?
What challenges will this person have to handle consistently?
A strong profile gives everyone involved in the hiring process the same definition of success.

2. Write the Job Description Around the Role

Too many job descriptions are inherited.
Someone leaves.
HR finds the old description.
A few words get changed.
And hiring begins.

Instead, build the job description from the actual requirements of the role.
What will this person be accountable for?
What will they need to accomplish?
What capabilities are genuinely necessary?

The clearer you are before candidates apply, the less likely you are to compensate for an unclear role during the interview. 

3. Use an Interview Scorecard

Determine what you are evaluating before you meet the candidate.
Then ask candidates consistent questions tied to those criteria.
Score their answers.
Document the evidence.
Compare candidates against the role rather than against one another.
The goal isn't to remove human judgment from hiring.
The goal is to give that judgment better information.

Better Decisions Start Before the Interview

The hidden cost of cognitive bias in sales hiring isn't simply choosing the wrong candidate.
It's everything that follows.
Missed revenue.
Management time.
Onboarding costs.
Team disruption.
Lost opportunities.
And eventually, another hiring process.

Sales leaders spend enormous amounts of time improving forecasts, pipelines and sales processes.
The hiring process deserves the same discipline.

Because your ability to build a high-performing sales team starts long before someone's first day.
It starts with how you decide who gets the job.

I'll be exploring this topic in depth at UNBOUND26 in Boston during my session, “The Hidden Cost of Cognitive Bias in Sales Hiring.”

We'll look at why these biases happen, where they show up in the hiring process and how leaders can build a more objective approach.
And we'll build the tools to put it into practice.

If you're attending UNBOUND26, I hope you'll join me.

If your organization is working through sales hiring, leadership performance or behavior change:

You can also explore my keynotes and workshops on my speaker page.

Because better conversations create better decisions.
And better decisions create better results.