The Real Cost of Hiring the Wrong Executive Assistant

Hiring the wrong executive assistant is one of the most expensive mistakes a senior leader can make, and one of the least discussed. When a sales hire fails, the missed quota is visible on a dashboard. When an assistant hire fails, the damage is quieter. It shows up as a calendar that never quite works, a founder who is still answering routine email at midnight, and a slow erosion of trust in the very idea of delegating.

The numbers, however, are anything but quiet.

What the data says a bad hire costs

The U.S. Department of Labor has long estimated that a bad hire costs an employer at least 30 percent of that employee's first-year earnings. For an executive assistant on a 50,000 salary, that is a 15,000 write-off before you account for anything else. For a senior EA supporting a chief executive, where salaries of 70,000 to 90,000 are common in major markets, the floor rises to 21,000 to 27,000.

And that 30 percent figure is a floor, not a ceiling. It covers the direct, countable costs: recruitment fees, onboarding time, training, and the administrative cost of exit. It does not cover the costs that matter most at the executive level:

• The cost of re-hiring. SHRM benchmarking has put the average cost per hire in the thousands of dollars, and executive-support roles sit above the average because they demand discretion and judgement, which are hard to screen for. Every failed hire means paying that cost twice.
• The cost of executive time. The Harvard Business School study of CEO time by Michael Porter and Nitin Nohria found chief executives work an average of 62.5 hours a week. Every hour spent re-interviewing, re-training, and re-explaining is drawn from the most expensive hour in the company.
• The cost of what did not happen. An assistant exists to multiply executive output. A wrong hire does not merely fail to multiply it. They divide it, because the executive now carries their own workload plus the supervision of someone who cannot be trusted with it.

Why assistant hires fail differently

Most bad hires fail on skill or effort. Assistant hires rarely do. The failed EAs we hear about were usually competent, organised, and hard-working. They failed on something else entirely: fit with the specific executive they served.

An assistant who thrives under a structured, process-driven COO can drown under a founder who changes direction three times before lunch. An assistant who excels at anticipating an introverted principal's needs can suffocate an executive who wants visible, energetic partnership. The CV looks identical in both cases. The outcome is opposite.

This is the blind spot in conventional recruitment. Agencies screen for experience, software skills, and references, all of which are real but none of which predict whether two specific working styles will mesh under pressure. It is why we built the HK Index, a structured working-style assessment, and why every placement we make passes through a screening process that measures fit before either side commits.

The compound cost: a worked example

Consider a founder who hires an EA at 55,000 in January and parts ways with them in July.

• Six months of salary and employment costs: roughly 32,000 with on-costs.
• Department of Labor 30 percent minimum: 16,500 written off.
• Recruitment fees for the original hire and the replacement, typically 15 to 20 percent of salary each time: up to 22,000 combined.
• Founder time: interviewing, onboarding, correcting, and managing the exit conservatively consumes 60 to 80 executive hours. At the effective hourly value of a founder running a growing company, that alone can exceed the salary cost.

The visible cost approaches 70,000. The invisible cost, the deals not chased, the hiring rounds delayed, the strategic work that never left the notebook, is unknowable but real. Research summarised by Harvard Business Review suggests around a quarter of a chief executive's time goes to work that could be done by others or by systems. A wrong assistant hire keeps that quarter locked up for another year.

How to take the risk out of the hire

Three principles separate durable assistant relationships from expensive false starts:

1. Assess working style before skills. Skills can be verified in an hour. Working-style fit is where the hire lives or dies, and it must be measured deliberately. This is what the HK Index assessment does for both the executive and the candidate.
2. Screen for the pairing, not the person. A brilliant assistant is only brilliant next to the right principal. Our sourcing service runs every candidate through the Compliance Filter and a six-gate funnel before a shortlist ever reaches you, so the people you meet are already matched to how you actually work.
3. Invest in the first ninety days. Even a well-matched pairing needs structure at the start. Our training and integration service exists because the handover period is where most avoidable failures begin.

The wrong assistant costs at least 30 percent of a year's salary and, more importantly, another year of your own time. The right one repays their cost many times over. The difference between the two is rarely luck. It is measurement. You can see how the full process works on our how it works page, or review engagement options when you are ready.