Rental Property Cash Flow Calculator

Calculate monthly net cash flow, cash-on-cash return, and cap rate for a rental property after mortgage, taxes, insurance, and reserves.

Inputs

Monthly Rent ($)

Other Monthly Income ($)

Mortgage Payment ($)

Property Tax (monthly) ($)

Insurance (monthly) ($)

Vacancy Rate (%)

Management Fee (%)

Maintenance Reserve (%)

CapEx Reserve (%)

Total Cash Invested ($)

Property Value ($)

Tab to move between fields

Results

Monthly Cash Flow

$8.00

≈ 2 cups of coffee

Annual Cash Flow

$96.00

≈ 6 movie tickets

Cash-on-Cash Return

0.16%

Effective Gross Income (monthly)$1,900.00

Operating Expenses (monthly)$692.00

Monthly NOI$1,208.00

Cap Rate4.83%

Operating Expense Ratio36.42%

Meets 1% Rule (0/1)0

Annual Gross Income$24,000.00

How to Use This Calculator

Enter monthly rent ($) and any other monthly income ($) (parking, laundry, storage).
Enter your PITI mortgage payment ($), property tax (monthly $), and insurance (monthly $).
Set vacancy rate (%) and add utility, management, and repair reserve expenses.
Review monthly NOI (net operating income) and monthly cash flow after debt service.
Check cash-on-cash return and annual cash flow to evaluate the investment's performance.

How the result changes with Monthly Rent ($)

Monthly Rent ($)	Monthly Cash Flow	Annual Cash Flow	Cash-on-Cash Return
5,000	$2,345.00	$28,140.00	46.9%
17,500	$12,082.50	$144,990.00	241.65%
32,500	$23,767.50	$285,210.00	475.35%
45,000	$33,505.00	$402,060.00	670.1%

What each input means

Monthly Rent ($): Gross monthly rental income from the property.
Other Monthly Income ($): Additional income: laundry, parking, storage, pet fees, etc.
Mortgage Payment ($): Monthly principal and interest payment (P&I only; taxes/insurance entered separately).
Property Tax (monthly) ($): Monthly property tax amount.
Insurance (monthly) ($): Monthly landlord insurance premium.
Vacancy Rate (%): Expected vacancy as % of gross income. Typical: 3-8%.
Management Fee (%): Property management fee as % of effective income. Typical: 6-10%.
Maintenance Reserve (%): Maintenance/repair reserve as % of effective income.
CapEx Reserve (%): Capital expenditure reserve for roof, HVAC, appliances, etc.
Total Cash Invested ($): Down payment + closing costs + rehab. Used for cash-on-cash return.
Property Value ($): Current market value. Used for cap rate and 1% rule.

What each result means

Effective Gross Income (monthly): Gross income minus vacancy allowance.
Operating Expenses (monthly): Taxes, insurance, management, maintenance, and CapEx reserves.
Monthly NOI: Net Operating Income before mortgage payments.
Monthly Cash Flow: Net cash flow after all expenses and mortgage.
Annual Cash Flow: Yearly net cash flow.
Cash-on-Cash Return: Annual cash flow / total cash invested. Good target: 8-12%.
Cap Rate: Annual NOI / property value. Good target: 5-10%.
Operating Expense Ratio: Operating expenses as % of effective income. Under 50% is healthy.
Meets 1% Rule (0/1): 1 if monthly rent >= 1% of property value, 0 if not.

How this is calculated

Worked example, using the default values

Identify Input Parameters
4 parameters
Monthly Rent ($) = 2000, Other Monthly Income ($) = 0, Mortgage Payment ($) = 1200, Property Tax (monthly) ($) = 250 = 11 input(s) provided
Calculate Monthly Cash Flow
Monthly Cash Flow = monthlyNOI - mortgagePayment
8 = $8
Calculate Annual Cash Flow
Annual Cash Flow = monthlyCashFlow * 12
96 = $96
Calculate Cash-on-Cash Return
Cash-on-Cash Return = totalCashInvested > 0
0.16 = 0.16%
Calculate Effective Gross Income
Effective Gross Income = monthlyGrossIncome - monthlyVacancyLoss
1900 = $1,900
Calculate Operating Expenses
Operating Expenses = propertyTaxMonthly + insuranceMonthly + managementFee + maintenanceCost + cap...
692 = $692

Engine last updated July 26, 2026. Checked against 2 independently-derived tests — how we verify calculators.

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