FinanceCalcs
Rental Property Calculator
Analyze any rental property investment — monthly cash flow, cap rate, cash-on-cash return, and true ROI. Enter your income, expenses, and financing details to see if the numbers work.
Used by investors, agents, and buyers to evaluate single-family rentals, small multifamily, and investment condos before making an offer.
Rental Property Calculator
$0 property | $0/mo rent
Monthly Cash Flow: $0
- Cash Flow
- Equity
>Income & Expense Breakdown
| Item | Monthly | Annual |
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10-Year Projection
| Year | Gross Rent | NOI | Cash Flow | Equity | Property Value | Total Return |
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"Real estate investing, even on a very small scale, remains a tried and true means of building an individual's cash flow and wealth."
— Robert Kiyosaki
How to analyze a rental property
A profitable rental property passes multiple tests. Cash flow — monthly rent minus all expenses including mortgage — should be positive. Negative cash flow means you're subsidizing tenants out of pocket every month. Even a small positive cash flow of $100–$200/month is meaningful across a portfolio.
The cap rate (capitalization rate) measures return independent of financing — it's Net Operating Income divided by property value. Cap rate tells you what the property would yield if bought all-cash. Higher is better; typical residential cap rates range from 4–8% depending on market.
Cash-on-cash return measures the annual cash flow relative to your actual cash invested (down payment + closing costs + rehab). This is your real-world return on the money you deployed. A 6–10%+ cash-on-cash is considered strong for residential rental property.
The 1% rule is a quick filter: monthly rent should be at least 1% of the purchase price ($2,000/mo on a $200K property). It's not a hard requirement, but properties that fail significantly often struggle to cash flow.
lightbulb Rental Property Benchmarks
| Metric | Poor | Good | Excellent |
|---|---|---|---|
| Cash Flow | < $0/mo | $100–$300 | $400+/mo |
| Cap Rate | < 4% | 5–7% | 8%+ |
| Cash-on-Cash | < 4% | 6–10% | 12%+ |
| Gross Rent Multiplier | > 20 | 12–16 | < 10 |
| DSCR | < 1.0 | 1.2–1.4 | 1.5+ |
| 1% Rule | < 0.7% | 0.8–1.0% | > 1% |
Benchmarks vary significantly by market. High-appreciation markets (coastal cities) typically have lower cap rates and cash flow; high-cash-flow markets (Midwest, South) typically have lower appreciation. Most investors optimize for one or the other.
Rental Property FAQs
What expenses do most investors forget to include?
The most commonly underestimated costs: CapEx reserves (budget for roof, HVAC, water heater, appliances over a 20–30 year horizon — roughly $100–$200/month on a single-family), vacancy (most markets average 5–10% vacancy even with good tenants), and property management (8–12% of gross rent even if self-managing — because your time has value). New investors who ignore these three often find "cash flowing" properties that actually lose money.
What is DSCR and why does it matter?
Debt Service Coverage Ratio is NOI divided by annual mortgage payment. A DSCR above 1.0 means the property generates enough income to cover the mortgage. Lenders typically require 1.20–1.25 DSCR for investment property loans. A DSCR below 1.0 means you're covering part of the mortgage out of pocket each month — the property has negative cash flow.
How does depreciation reduce my taxes?
The IRS allows residential rental property to be depreciated over 27.5 years. On a $300,000 property (assuming $240K is the structure value — land is not depreciable), that's $8,727/year in depreciation deductions against rental income. For someone in the 22% bracket, that saves ~$1,920/year in taxes. Depreciation is a non-cash deduction — it improves after-tax cash flow without requiring any money out of pocket.
What is a good rent-to-price ratio?
The 1% rule says monthly rent should equal 1% of the purchase price. This threshold — admittedly arbitrary — generally separates properties that cash flow from those that don't at typical financing costs. In expensive coastal markets, 0.5–0.7% is common and many investors accept lower cash flow in exchange for higher appreciation. In the Midwest and South, 1%+ is often achievable.
Rental investment terminology
Net Operating Income (NOI)
Gross rental income minus all operating expenses, excluding mortgage payments. The income the property generates before debt service. NOI ÷ purchase price = cap rate.
Cap Rate (Capitalization Rate)
NOI divided by property value. Measures the all-cash return of the property independent of financing. Used to compare properties and markets. A 6% cap rate means the property yields 6% if purchased with 100% cash.
Cash-on-Cash Return
Annual pre-tax cash flow divided by total cash invested (down payment + closing costs + rehab). Measures the actual return on your deployed capital. More useful than cap rate for leveraged investments.
Gross Rent Multiplier (GRM)
Purchase price divided by annual gross rent. A quick valuation metric — lower is better. GRM of 10 means the property costs 10× its annual rent. Useful for quick comparison but ignores expenses.
Debt Service Coverage Ratio (DSCR)
NOI divided by annual debt service (mortgage P&I). Measures how well rental income covers the mortgage. A DSCR of 1.25 means income is 25% above the mortgage payment — the standard lender minimum for investment property loans.
CapEx (Capital Expenditures)
Large, infrequent repairs and replacements — roof, HVAC, foundation, appliances, flooring. Should be budgeted monthly even though the expense occurs years in the future. Often overlooked by new investors and the single biggest cause of "profitable on paper" properties that actually lose money.
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