What Does an Open Role Really Cost? Making Vacancy Costs Visible

Marcus

Aug 23

5 min read

The desk sits empty. The salary line is blank. Leadership breathes a sigh of relief.

And somewhere in the organization, something is quietly burning.

The idea that an unfilled position saves money is one of the most persistent — and most expensive — misconceptions in business. Treating a vacancy as a zero-cost line item is like unplugging your electric kettle to lower the power bill while a pipe bursts in the basement.

The math isn't wrong. It's just incomplete.

The Blind Spot Nobody Writes Down

Every HR team knows the scenario: the role has been open for weeks, the team is still holding it together, and leadership is holding off. "Let's see if we really need to backfill" — a sentence spoken in conference rooms while colleagues rack up overtime and quietly wonder whether their next employer will operate the same way.

HR knows what this means. HR sees what's happening. But without numbers, that knowledge stays a gut feeling — and gut feelings consistently lose to quarterly figures in budget conversations. It doesn't have to be that way.

What Vacancy Costs Really Are — And Why 70% Stay Invisible

Vacancy costs come in two distinct blocks, and the critical mistake is knowing only one of them.

Block 1: Direct Costs

These are the costs you can at least touch: overtime pay for the team plugging the gap, increased recruiting spend, external agency or interim fees, and occasionally sick leave driven by overload. These direct costs are measurable, bookable, and, according to Haufe, account for roughly 30 percent of actual vacancy costs.

Block 2: Opportunity Costs

This block is less visible but far larger: lost value creation from deferred decisions, slowed projects, missed deals, and delayed product launches. The initiative that stalls without a product owner. The sales push that only half-takes off without a sales manager. The digital transformation fragments into endless alignment meetings without someone steering it.

Research published in the Review of Accounting Studies shows that vacancy duration correlates significantly with declining firm profitability. For key positions, these opportunity costs account for roughly 70 percent of total vacancy costs — and they compound with every additional week the role remains open.

The total is consistently surprising to those who see it for the first time: vacancy costs for a key position typically run two to four times the monthly compensation for that role. Over a multi-month vacancy for a leadership position, that adds up to six figures fast — booked nowhere, visible nowhere, but real in its impact on the bottom line.

The Formula: Making Vacancy Costs Concrete

There's no one-size-fits-all formula that works the same for every role and every company. But there is a structured framework TA teams can use to calculate vacancy costs for their specific situations:

Direct costs: monthly compensation for the role x vacancy duration + recruiting spend (internal and external) + incremental overtime or interim costs.

Opportunity costs require a bit more context — but they're often more powerful in leadership conversations: What is this role's value contribution per month? How much revenue, project delivery, or decision-making volume depends directly on this position? What specific delays are being caused, and what do they cost?

A simple example:

a project manager for digital transformation initiatives costs the company $8,000 per month. Three external consultants working without coordination burn $20,000 per month combined. Two digitization projects with $250,000 in efficiency savings each slip by at least one quarter.

That delay alone dwarfs the savings from the salary, before a single overtime hour is logged.

The Leadership Conversation: Why Numbers Change Everything

There's a fundamental difference between "We have a talent shortage" and "This open role is costing us $X per month." The first sentence is a problem description. The second is a business case.

C-suite and business leaders think in terms of costs, risks, and opportunities. HR professionals who can quantify vacancy costs suddenly speak the same language. They shift from the role of problem-reporter to strategic advisor. And that changes how recruiting resources, time-to-fill, and hiring velocity get evaluated internally.

Practically, if you can demonstrate to leadership that an open VP position costs $150,000 per quarter, you change the conversation about whether an executive search firm charging $25,000 is expensive or cheap. If you can show that three open sales roles are burning half a million in pipeline opportunity every quarter, your weight in a headcount conversation looks very different from someone saying the team is stretched thin.

Hidden Vacancies: Costs That Aren't Official Yet

Vacancy costs don't start with a resignation. They begin much earlier — and this is the part that most HR teams are completely blind to.

The sales director who has mentally already checked out. The high performer is quietly reviewing an outside offer. The operations lead whose retirement is two years away and whose institutional knowledge lives nowhere but in their head. These latent vacancies operate like slow-burning fuses — invisible until the window for an orderly transition has already closed.

According to Gallup's 2025 State of the Global Workplace report, disengaged employees cost the world economy approximately $8.9 trillion in lost productivity. The US share alone runs into the trillions annually — distributed across companies that don't yet know their best people are already halfway out the door.

If you're thinking about vacancy costs, don't just look at the current open roles. Think about the roles that will be open twelve months from now.

What TA Teams Can Do Right Now

The first step is building internal visibility. Calculate vacancy costs for your three most critical open roles right now. Not perfectly — approximately. Direct costs plus a conservative estimate of opportunity costs is enough to start the conversation. A spreadsheet with six rows can change a budget meeting.

Then bring those numbers into your next conversation with leadership or the hiring manager. Not as an accusation — as a foundation. "This role is currently costing us $X per month — what can I work with to accelerate the hire?"

And finally: think about latent vacancies. Which key positions in your organization are at medium-term risk? What would it cost if those roles went unexpectedly vacant in the next twelve months?

These aren't comfortable questions. But they're the right ones.

What I Take From This

In too many organizations, recruiting is still treated as a cost center rather than a value driver. That changes the moment TA teams start speaking the language decision-makers understand: numbers, costs, opportunities.

Making vacancy costs visible isn't an end in itself. It's a strategic tool — one that helps TA teams earn the organizational standing they need. Not because HR deserves it. Because the business needs it.

The empty desk isn't saving money. It's just costing differently.