Ask any experienced landlord what kills rental property returns and they'll all say the same thing: property management.
Not because property managers are bad. Because new investors don't budget for it — then either burn out managing themselves or hire a manager and watch their cash flow evaporate.
Here's the math most people skip.
Self-managing sounds free. It's not.
You'll spend 5-10 hours per month per property on tenant calls, maintenance coordination, rent collection, lease renewals, and the occasional 2am emergency. At 10 hours/month, that's 120 hours/year. If your time is worth $50/hour, you're spending $6,000/year in unpaid labor.
On a property that cash flows $300/month ($3,600/year), you're actually earning negative money for your time.
Hiring a manager costs 8-12% of gross rent.
On a $1,200/month rental, that's $96-144/month gone. On a property with $300/month cash flow before management, you're now at $156-204/month. Still positive, but barely.
Most first-time investors calculate returns without management costs because they plan to self-manage. Then they discover the reality 6 months in and their actual returns are half what they projected.
The fix: always underwrite with management.
Even if you plan to self-manage at first, include 8% management in every deal analysis. This does two things:
It ensures the deal works even if you hire a manager later.
It gives you a realistic picture of the property as a true passive investment.
If a deal only works because you're providing free labor, it's not a good deal. You're not investing — you're buying yourself a part-time job.
What good management actually costs by market:
Small cities (Akron, Toledo, Peoria): 10-12% — fewer managers, less competition. Mid-size cities (Birmingham, Baltimore): 8-10% — competitive market. Large cities (Phoenix, Dallas, Atlanta): 7-9% — high competition drives rates down.
Factor this into every analysis. Run the numbers both ways — with and without management:
Next week: 3 states where property taxes eat your entire cash flow (and the 5 with the lowest rates).
— The Numbers Letter