What a Bad Senior Hire Actually Costs in Australia

The search fee is almost never the expensive part of a bad senior hire, even though it’s the number everyone focuses on. The real cost turns up later, mostly as salary paid for work that didn’t land and months lost running the process again. There’s also a newer way to get it wrong. A business hires a capable leader for the version of the job that existed before AI changed it, and only finds out once the person is in the seat. Headhuntly is based on the Gold Coast and runs senior searches nationally.

Why is a bad senior hire easier to make in the AI era?

Because the job moves faster than the brief. A Head of Marketing, COO or CTO hired today is usually expected to decide what AI should do in their area, including what stays with people. If the brief doesn’t say that plainly, the search optimises for the old job, and you get someone excellent at running a function the business is about to redesign.

We see three common versions:

• the brief asks for “AI fluency” without saying what AI should change, so the shortlist is judged on tool names
• the candidate is strong but was hired to steady a team, when the business needed someone to rebuild it around automation
• a Chief AI Officer gets added after the hire, and decision rights over data and tooling turn into a turf dispute

Keyword screening makes this worse. A CV listing every AI platform says little about judgement, which is one reason we don’t use AI or ATS keyword filters on candidates.

Does the 3.5x bad-hire multiplier apply in Australia?

Not reliably. Some overseas executive search firms publish a multiplier for a bad hire, commonly around 3.5 times base salary. It’s a UK-market estimate built on UK salary and severance norms, and nobody has verified it here. We’d rather show you what goes into the cost, so you can estimate it for a specific role.

What goes into the cost of a bad senior hire?

Salary paid during the failed tenure, the cost of the empty or underperforming seat, running the search again, and disruption to the team.

Start with salary. If a $220K base hire doesn’t work out and it takes nine months to recognise and act on, that’s most of a year’s salary and super paid for work that gets redone. On top sits notice, severance or a negotiated exit, which can run from a few weeks’ pay to a substantial settlement.

Then there’s the vacancy. The work didn’t happen properly during the tenure and doesn’t happen at all while the seat is empty, and in an AI-era role the stalled work is often the redesign they were hired to lead.

Running the search again adds a second fee, the three to six weeks a headhunted search typically takes, and ramp-up time for the replacement. If the first search was contingency or database-based, this is often where the mistake repeats: the same process runs again against the same unchanged brief.

Team disruption is the hardest to put a number on, and it often does the most damage. If the team was mid-way through changing how it works with AI, a failed leader can leave it stuck halfway, with new tools and old habits.

A worked example

Take a $200K base Head of Marketing hire that doesn’t survive month nine. Nine months of salary and super is roughly $170K in direct cost, before severance or exit terms. Add a replacement search (fee plus roughly a month and a half of search time, then one to three months for the new hire to ramp up) and you’re easily six to eight months behind where the function should have been. The original search fee is a small fraction of that. For scale, Kolvera, citing the 2025 RCSA Fee Survey, puts the average Australian contingency fee at 17 to 18% of first-year base, which on a $200K role is roughly $35K.

How do you reduce the risk of a bad senior hire?

You can’t remove the costs above, but you can lower the chance of paying them, mostly through the brief and the search.

Say in the brief what AI should change in the role, who owns tooling and customer data, and whether you need someone to build or someone to steady. “Use AI more” isn’t a brief. “Bring content production in-house and cut agency spend” is.

Advertising alone doesn’t help much: applications per job ad are at peak levels, up 1.7% year on year according to SEEK’s August 2026 employment report, and a bigger pile of applicants means more screening without a better fit. A search that reaches people who aren’t job hunting, and tests them on the decisions they’ve actually made with AI, lowers the odds. That’s the reasoning behind headhunting a senior role: no candidate database, one client and one role at a time, and a re-hunt if the placement doesn’t work out in probation.

Frequently asked

Is there a reliable multiplier for the cost of a bad hire in Australia? Not one we’d stand behind. The commonly cited 3.5x figure comes from UK executive search firms and reflects UK salary and severance norms. The components (lost salary, vacancy cost, re-search, team disruption) are the same in Australia, but the total depends on the role, salary and how long the mistake takes to recognise.

What’s the single biggest cost in a failed senior hire? Usually the salary paid before the mistake is recognised and acted on.

How does AI make a bad senior hire more likely? Mostly through the brief. If it doesn’t say what AI should change in the role, the search finds someone strong at the pre-AI version of the job. Screening CVs for AI tool names adds to the problem.

Does a headhunted search reduce this risk compared to advertising the role? It should, because it starts from a more precise brief and reaches candidates who weren’t necessarily job hunting. It doesn’t remove the risk entirely.

Where to start

If you’re weighing the cost of a search against the cost of getting a senior hire wrong, get in touch and we’ll talk through the role and what AI should change in it. See what a search itself costs here.