Published May 29, 2026
The Real Numbers Behind Passive Income
The Real Numbers Behind Passive Income: What Cash Flow Actually Looks Like After All the Expenses
Real estate investment influencers love to show you the gross rent. "This property brings in $2,400 a month!" What they conveniently skip is everything that comes out of that $2,400 before a single dollar reaches your bank account. Here's an honest look at what cash flow actually means.
Gross rent vs. net cash flow
Gross rent is what a tenant pays you. Net cash flow is what you keep after every expense. The gap between those two numbers is where most new investors get surprised.
A property renting for $2,000/month sounds great — until you account for the mortgage, taxes, insurance, property management, maintenance, vacancy, and capital reserves. In many cases, "cash flowing" properties net their owners $200-$400/month per door. Not nothing — but very different from $2,000.
The full expense stack
Here are the expenses every real estate investor needs to budget for:
Mortgage (PITI): Your principal, interest, property taxes, and insurance payment. This is the biggest line item and easy to calculate. On a $250,000 loan at 7%, you're looking at roughly $1,663/month before taxes and insurance.
Property management: If you hire a manager (highly recommended for out-of-state or if you scale), budget 8-10% of gross rent. On a $2,000 rent, that's $160-$200/month.
Maintenance: Budget 5-10% of gross rent annually for routine repairs — leaky faucets, appliance fixes, HVAC filters, landscaping. On a $2,000 rent property, set aside $100-$200/month.
Capital expenditures (CapEx): These are big-ticket replacements — roof, HVAC, water heater, flooring. Budget another 5-10% of gross rent. These don't happen every month, but when they do, they're expensive.
Vacancy: Even great properties sit empty between tenants. Budget 5-8% of gross rent for vacancy. That's one month empty every 12-20 months.
Utilities (if applicable): In some markets, landlords cover water, trash, or heat. Know your lease terms.
A realistic cash flow example
Property: Single-family home, purchase price $280,000
Down payment: $56,000 (20%)
Loan: $224,000 at 7% = $1,490/month
Taxes and insurance: $350/month
Gross rent: $2,100/month
Expenses:
Mortgage (PITI): $1,840
Property management (9%): $189
Maintenance (7%): $147
CapEx (7%): $147
Vacancy (6%): $126
Total expenses: $2,449
Net cash flow: -$349/month
That's a property most people would call a "good deal" that is actually slightly cash-flow negative in today's market. This is not unusual — and it's why market selection and purchase price are everything.
When the numbers do work
Cash flow positive properties still exist — but you need to look in the right markets. Secondary cities, Midwest metros, and parts of the Southeast often offer better rent-to-price ratios than coastal markets. Multifamily properties frequently outperform single-family on cash flow per dollar invested. And value-add deals — where you can force appreciation through renovation — can turn thin deals into strong ones.
The bigger picture
Cash flow is just one dimension of real estate returns. Equity buildup (your tenant paying down your mortgage), appreciation, and tax benefits (depreciation, mortgage interest deduction) all contribute to total return. Many investors accept thin or break-even cash flow in appreciating markets because the overall return still makes sense. Know your numbers, know your strategy, and never let a headline rent figure be the whole story.
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