Rental Property Cash Flow Calculator — State-Specific Property Tax Rates
Analyze rental property investments with state-specific tax rates for all 50 states. Calculate cash flow, cap rate, cash-on-cash return, NOI, DSCR, and gross rent multiplier with an expense waterfall chart.
Rental Property
Results update instantly as you type
Enter Values
Debt Service Coverage Ratio
0.75x
Gross Rent Multiplier
11.7x
Monthly Mortgage Payment
$1,910.09
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Monthly Cash Flow Breakdown
How your gross rent flows down to net cash flow after all deductions
This property runs a $475/month cash flow deficit — you would need to contribute out-of-pocket each month.
Key Investment Metrics
Cap Rate
4.92%
Cash-on-Cash Return
-7.13%
DSCR
0.75x
1% Rule Check
Monthly rent should equal at least 1% of purchase price to likely generate positive cash flow.
0.71%
| Gross Monthly Rent | $2,500.00/mo |
| − Vacancy Loss | -$125.00/mo |
| = Effective Gross Rent | $2,375.00/mo |
| − Operating Expenses | -$940.00/mo |
| = Net Operating Income (NOI) | $1,435.00/mo |
| − Mortgage / Debt Service | -$1,910.09/mo |
| = Net Cash Flow | -$475.09/mo |
The Formula
Rental property analysis uses multiple metrics to evaluate investment quality: cap rate measures return independent of financing; cash-on-cash measures your leveraged return; DSCR measures debt safety; and GRM provides a quick relative valuation.
Variable Definitions
Net Operating Income
Effective gross rent minus all operating expenses (taxes, insurance, HOA, maintenance, management). Does not include mortgage payments.
Capitalization Rate
NOI ÷ Purchase Price. Measures the unlevered yield of the property. Typical range: 4–8%. Higher is better.
Cash-on-Cash Return
Annual cash flow after debt service ÷ total cash invested. Measures your return on the actual dollars you put in. Target: 8%+.
Debt Service Coverage Ratio
NOI ÷ Annual Mortgage Payments. Most lenders require ≥1.25x to qualify for an investment property loan.
Gross Rent Multiplier
Purchase Price ÷ Annual Gross Rent. A quick valuation shortcut — lower is generally better. Typical range: 8–15x.
How to Use This Calculator
- 1
Enter the property purchase price and your down payment.
- 2
Add upfront closing costs or initial repair expenses to the cash invested.
- 3
Enter the mortgage interest rate and loan term for investment property.
- 4
Enter the expected monthly gross rent at full occupancy.
- 5
Enter property taxes (varies significantly by market — check your county assessor).
- 6
Enter HOA fees if applicable — critical for condo investments.
- 7
Adjust vacancy rate, maintenance buffer, and management fees to reflect local reality.
- 8
Review the Cash Flow Waterfall to see exactly where your rent dollars go.
Common Applications
- Analyze a potential rental property investment by calculating monthly cash flow after all expenses including mortgage, taxes, and vacancy.
- Compare the cap rate and cash-on-cash return across different investment properties to identify the best value in your market.
- Determine the minimum rent needed to cover all ownership costs and generate your target monthly profit margin.
The cash flow waterfall shows how each dollar of rent flows through expenses — positive cash flow depends on keeping costs below rental income
Understanding the Concept
A profitable rental property should generate positive monthly cash flow after all expenses and mortgage payments. Property taxes vary enormously by market — Austin TX averages ~2.2% while Michigan averages ~1.4% of assessed value. HOA fees are especially important for condos and can range from $100 to $1,000+/month. The cash flow waterfall shows exactly where each dollar of rent goes, from gross income down through vacancy, operating expenses, and debt service to your net cash flow.
Frequently Asked Questions
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