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Investment Properties

How Do I Calculate Cash Flow on a Rental?

Patrick Kevin FaganPatrick Kevin FaganUpdated August 18, 2026

Cash flow equals rental income minus all expenses: mortgage payment, property taxes, insurance, maintenance, vacancy allowance, and property management. Positive cash flow is essential. Target $200 or more per month after all expenses. Never count appreciation as cash flow.

Calculation Method

Income minus PITI minus maintenance minus vacancy minus management equals cash flow.

Expense Categories

Mortgage, taxes, insurance, maintenance (10% of rent), vacancy (5-8%), management (8-10%).

Example Analysis

$1,800 rent - $1,200 PITI - $180 maintenance - $90 vacancy - $144 management = $186/month.

Target Returns

$200+/month per property minimum. Cash-on-cash return of 8%+ is a common target.

Common Mistakes

Forgetting vacancy, underestimating maintenance, not accounting for capital expenditures.

Patrick's Take

"I have helped many families buy homes across San Antonio and the Hill Country. Every neighborhood has its own character and trade-offs. My goal is to help you find the right fit for your budget, lifestyle, and goals. Reach out anytime to talk through your options."
PF
Patrick Kevin Fagan
Patrick Kevin Fagan

Patrick Kevin Fagan

Loan Officer and Realtor, AXEN Realty LLC

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