What Teacher Turnover Is Actually Costing Your School (And What Can Change It)

By Phillip Nazak, Growth Culture Solutions

Every principal I talk to knows the feeling. You hire a strong candidate in August, invest two months getting them oriented and settled, watch them start to find their footing — and then they're gone by January. Or they finish the year, and you find out in June that they're not coming back.

You post the position again. You repeat the process. And somewhere in the back of your mind, you know this is costing you something. Most school leaders just don't know how much.

The number is bigger than most districts budget for.

The Hidden Cost Nobody Tracks

Research on teacher turnover consistently puts the cost of replacing one teacher at $20,000 to $30,000 per departure. That figure accounts for recruiting and hiring costs, onboarding and orientation time, the productivity loss while a new hire gets up to speed, and the disruption to students who lose continuity mid-year or between years.

For a school that hires five to ten new teachers every year — common in mid-size buildings — that's a potential six-figure line item that doesn't appear anywhere in the budget as 'teacher turnover.' It shows up instead as substitutes, re-advertising costs, curriculum delays, and the invisible tax on veteran teachers who absorb the extra load while a new colleague finds their footing. Or doesn't.

The scale of the underlying problem makes this worse. Approximately 44 percent of new teachers leave the profession within their first five years. In the 2022–23 school year, 30 percent of teachers with fewer than three years of experience left their school. In 2024–25, half of school leaders said their buildings were understaffed.

These are not rounding errors. This is a structural drain on school budgets, and most districts are funding it without a clear line of sight into what's driving it or what would actually reduce it.

Why Early-Career Teachers Leave

The common assumption is that new teachers leave because teaching is hard. That's partially true — but it misses the more actionable part of the picture.

When early-career teachers exit the profession, the most common reasons cluster around a specific set of challenges: classroom management that feels unmanageable, difficulty building the right kind of relationships with students and families, a sense of isolation inside the building, and a feeling that they weren't equipped for the realities of the job.

Notice what's not at the top of that list. It's not curriculum. It's not subject matter expertise. It's not even compensation, though that matters.

The skills that determine whether a new teacher stays or leaves in year one are largely practical and interpersonal — and they're skills that teacher preparation programs, almost universally, do not systematically teach. New teachers arrive having studied pedagogy, completed student teaching, and earned their credential. They often arrive having never been formally taught how to set up a routine, manage a room of 30 kids who are testing them, or navigate a conversation with a parent who is angry and scared about their child.

Those gaps don't close themselves. Without structured support, the teacher either figures it out through trial and error — a process that can take years and burns through a lot of goodwill — or they decide the job isn't worth what it costs them.

What Structured Support Actually Changes

The research on induction and early-career support is reasonably consistent on a few points.

Mentorship alone doesn't move the needle much. A new teacher paired with a veteran and left to it, with monthly check-ins and occasional observations, does modestly better than a new teacher with no support at all. But the effect size is small.

What moves the needle is structured, skill-focused development that runs alongside the teaching job itself. Not a week of orientation in August. Not a generic PD day in October. A program that identifies the specific skills new teachers need to survive and thrive in year one, builds those skills explicitly over time, and gives teachers a space to work through real challenges in real time.

The difference in outcomes is meaningful. Schools with strong, structured induction programs consistently report lower first-year attrition, higher second-year retention, and faster skill development among new hires.

From a budget perspective, that translates directly. A school that retains three additional early-career teachers a year — compared to a school that doesn't — is avoiding somewhere between $60,000 and $90,000 in replacement costs annually. Every year.

The math isn't complicated. The investment in structured early-career support pays for itself if it prevents even one or two departures a year.

The Conversation Worth Having

I'm not arguing that money is the reason to care about new teacher retention. The reason to care is that teachers matter, and the teachers who leave in year two or three are often the ones who would have become excellent.

But for school and district leaders who are making budget decisions under real constraints, the financial case for investing in structured early-career support is clearer than most people realize. You are already paying for teacher turnover. The question is whether you want to keep paying for it indefinitely, or invest some of that cost upstream in support that actually changes the outcome.

If you're hiring five or more new teachers a year and losing a meaningful share of them in years one through three, I'd encourage you to run the math for your own building. The answer is usually a strong argument for doing something different.

Phillip Nazak is the founder of Growth Culture Solutions, which provides structured professional development programs for teachers in their first one to three years.