22 years of turnovers taught me the cheapest month is the one you never have

I've been buying and operating rentals in Memphis since 2003. Few hundred doors, mostly single-family and small multi in the value neighborhoods, and I run my own crews and management. Over that stretch I've done a lot of turnovers, and I've slowly become convinced that most landlords are optimizing the wrong number.

Everyone tracks rent. Almost nobody tracks what a turnover actually costs them.

So here's the exercise. Take your last turnover and add up every real number, not the ones you remember:

Days vacant, times your daily rent.

Paint, flooring, cleaning, trash-out.

The maintenance items you deferred while occupied and finally did because it was empty.

Leasing or placement fee.

Utilities you paid while it sat.

Advertising.

Your own hours, if you value them at anything.

On a modest single-family rental, that number is usually somewhere between two and four months of gross rent. Every time.

Now hold that next to the rent increase you were nervous about asking for. On a $1,000 unit, a $50 bump is $600 a year. If pushing for it contributes to a tenant leaving a year earlier than they otherwise would have, you didn't make $600. You lost two to four months of rent plus the make-ready to earn it.

I'm not saying never raise rent. Below-market rents create their own problems, and a tenant who knows they're 20% under market has leverage over you that compounds every year. What I'm saying is that most of us carry a very precise sense of what our rent is and a very fuzzy sense of what our turnover costs, and we make decisions accordingly.

Once I actually calculated it, a few things changed in how I operate:

I got much more willing to fix things quickly. A $400 water heater call handled the same day used to feel like a cost. Now it reads as buying tenure. The tenant who feels ignored in year two is the tenant who leaves in year three, and that departure costs me multiples of the repair.

I stopped treating renewals as automatic. A short conversation two or three months before lease end - is anything not working, are you planning to stay - surfaces the fixable stuff while it's still fixable. Most move-outs I've had were decided weeks before anyone told me.

I got more careful about the gap between in-place rent and market rent, in both directions. Way under market invites a hard conversation later. Pushing to the absolute top of market on a good long-term tenant sometimes buys you a vacancy you didn't price.

And I started weighting tenure heavily in screening. A tenant who stayed four years at their last place is worth more to me than one with a slightly better credit score and three addresses in three years.

The thing that surprised me most, honestly, is how much of this ends up being about the tenant's actual life rather than the property. People move because of jobs, family, school districts, and because they got tired of asking twice for something to get fixed. Only the last one is in my control, but it's a bigger share of move-outs than most owners want to believe.

I'd like to hear from people who've run their own numbers on this:

What did your last turnover actually cost, all in?

Has anyone deliberately held rent flat for a good tenant and been able to say whether it paid off?

For those of you with genuinely long tenancies - five years plus - what do you think you did to get there, if anything?

And the harder version of the question: has anyone tracked this well enough to know their real average tenancy length across a portfolio? I suspect most of us, myself included, are guessing more than we'd admit.