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Rental Property ROI Calculator

Finance & Investment

Analyze rental property returns with cash flow, cap rate, and cash-on-cash ROI. Enter price, mortgage, rent, and expenses to evaluate any US rental deal.

Purchase Price
$
Down Payment
%
Mortgage Rate
%
Loan Term
yrs
Monthly Rent
$
Vacancy Rate
%
Annual Property Tax Rate
%
Monthly Insurance
$
Monthly Maintenance
$
Property Management Fee
%

Monthly Cash Flow

+$0

Cash-flow positive deal

Key Metrics

Annual Cash Flow+$0
Cash-on-Cash Return0.00%
Cap Rate0.00%
Gross Rental Yield0.00%
Monthly Mortgage$0

What is a Rental ROI?

A Rental Property ROI Calculator is a financial modeling tool that computes the key performance metrics of an income-producing property: monthly cash flow, annual cash flow, cash-on-cash return, cap rate, and gross rental yield. By entering your purchase price, down payment, mortgage terms, expected rent, vacancy rate, and operating expenses, you get an instant picture of whether a property will generate positive cash flow and what return you can expect on your invested capital.

Real estate investing in the US is highly leverage-dependent. Most investors finance 75–80% of the purchase price, which means your actual cash invested is a fraction of the property value. The calculator models this correctly — it computes your down payment as the denominator for cash-on-cash return, not the full property price. A $400,000 property with a 20% down payment represents $80,000 in cash invested; a $5,000 annual cash flow on that investment is a 6.25% cash-on-cash return.

The two most important metrics for leveraged real estate are cash-on-cash return and cap rate — and they measure different things. Cap rate measures the property's income performance independent of how it is financed (useful for comparing properties). Cash-on-cash return measures the return on your specific cash investment (useful for evaluating your actual deal). A property with a 6% cap rate can deliver an 8% cash-on-cash return if your mortgage rate is below the cap rate, or a 4% return if your rate is above it.

Interest rate environments dramatically affect rental property economics. At 3% mortgage rates (2020–2021), nearly any property with decent rent could be cash-flow positive. At 7% rates, the same properties often run at break-even or negative cash flow, requiring investors to rely more heavily on appreciation or buy in lower-priced markets to maintain positive yields.

For evaluating whether to buy versus continuing to rent, see the Rent vs Buy Calculator. For analyzing the tax consequences of selling a property after appreciation, the Capital Gains Tax Calculator computes your federal tax liability.

How to use this Rental ROI calculator

  1. Enter the Purchase Price — the price you are paying or analyzing. Do not subtract the down payment here; the calculator computes the loan amount from the purchase price and down payment percentage.

  2. Set the Down Payment percentage — for conventional investment property loans, lenders typically require 20–25%. Enter 20 for the minimum conventional down payment. Higher down payments reduce your mortgage and improve cash flow but reduce cash-on-cash return (more cash invested for the same cash flow).

  3. Enter the Mortgage Rate and Loan Term — use your actual quoted rate or the current 30-year investment property mortgage rate. Investment property loans typically carry a rate 0.5–0.75% higher than primary residence loans. The term is almost always 30 years for investment property.

  4. Enter Monthly Rent — use a realistic market rent estimate. Check local listings (Zillow Rental Manager, Realtor.com, or Rentometer) for comparable properties. Avoid using the top of the range — market rents can soften.

  5. Set the Vacancy Rate — default to 8% (approximately one month vacant per year) unless you have data suggesting otherwise. Higher-turnover areas or properties need higher vacancy assumptions.

  6. Enter Annual Property Tax Rate — find this on the county assessor's website. The effective property tax rate in the US ranges from 0.3% in Hawaii to 2.5% in New Jersey; the national average is around 1.1%.

  7. Enter Monthly Insurance — landlord insurance (dwelling fire and liability) typically runs $100–200/month for a single-family home. Request a quote from your insurer for accuracy.

  8. Enter Monthly Maintenance — a conservative rule is 1% of property value per year (so a $300,000 property = $3,000/year = $250/month). This covers routine repairs, appliances, and minor capital items.

  9. Set Property Management Fee — if you are self-managing, enter 0. If using a manager, 8–10% of gross rent is typical. Even if you plan to self-manage, consider running the numbers with 8–10% to understand what a manager would cost and whether the deal still works.

  10. Read the results panel — the Monthly Cash Flow result tells you immediately whether the deal is positive or negative. Adjust inputs to stress-test: lower rent by 10%, raise vacancy to 12%, and check whether the deal survives those assumptions.

Formula & Methodology

Loan amount and mortgage payment:

Loan Amount = Purchase Price × (1 − Down Payment % / 100)

Monthly Rate r = Mortgage Rate / 100 / 12

Number of Payments n = Loan Term × 12

Monthly Mortgage = Loan Amount × r × (1+r)^n / ((1+r)^n − 1)

Effective monthly rent:

Effective Rent = Monthly Rent × (1 − Vacancy Rate / 100)

Monthly operating expenses:

Monthly Expenses = Monthly Mortgage + (Property Tax Rate / 100 × Purchase Price / 12) + Monthly Insurance + Monthly Maintenance + (Management Fee % / 100 × Monthly Rent)

Cash flow:

Monthly Cash Flow = Effective Rent − Monthly Expenses

Annual Cash Flow = Monthly Cash Flow × 12

Cash-on-Cash Return:

Down Payment = Purchase Price × Down Payment % / 100

Cash-on-Cash ROI = (Annual Cash Flow / Down Payment) × 100

Cap Rate:

Annual NOI = (Effective Rent − all operating expenses excluding mortgage) × 12

Cap Rate = (Annual NOI / Purchase Price) × 100

Gross Yield:

Gross Yield = (Monthly Rent × 12 / Purchase Price) × 100

Worked example:

$350,000 purchase price, 20% down ($70,000), 7% mortgage rate, 30-year term, $2,200 monthly rent, 8% vacancy, 1.2% property tax, $150/month insurance, $250/month maintenance, 9% management fee.

Monthly mortgage = $232,750 loan × 7%/12 rate × 30-year term = $1,549/month

Effective rent = $2,200 × 0.92 = $2,024/month

Monthly expenses = $1,549 (mortgage) + $350 (property tax) + $150 (insurance) + $250 (maintenance) + $198 (management) = $2,497/month

Monthly Cash Flow = $2,024 − $2,497 = −$473/month (cash-flow negative)

Cap Rate: Monthly NOI = $2,024 − $998 (expenses ex-mortgage) = $1,026; Annual NOI = $12,312; Cap Rate = $12,312 / $350,000 = 3.52%

This property would require either a lower purchase price, higher rent, or a larger down payment to achieve positive cash flow — exactly the kind of analysis the calculator is designed to surface before a purchase decision.

Frequently Asked Questions

A Rental Property ROI Calculator estimates the financial performance of an income-producing property, computing monthly and annual cash flow, cash-on-cash return, cap rate, and gross rental yield from your purchase price, financing terms, rental income, and operating expenses. It helps you assess whether a specific property generates a positive return on your invested capital, and by how much, before you commit to a purchase.
Cash-on-cash return (CoC ROI) measures the annual pre-tax cash flow you receive as a percentage of the cash you actually invested — primarily your down payment and closing costs. For example, if you put $80,000 down on a property and it generates $5,600 in annual cash flow, your cash-on-cash return is 7%. This metric is useful because it reflects the return on your out-of-pocket investment rather than on the full property value, making it the most relevant ROI measure for leveraged real estate.
A cash-on-cash return of 6–10% is generally considered solid for residential rental property in most US markets. Returns below 5% may still make sense in high-appreciation markets like San Francisco or New York, where you are betting more on price appreciation than cash flow. Returns above 10% are attractive but often come with higher risk — higher vacancy, deferred maintenance, or lower-quality locations. The 'right' CoC return depends on your investment thesis and local market conditions.
Cap rate (capitalization rate) measures a property's income potential independent of financing — it divides net operating income (NOI, which excludes mortgage payments) by the property value. Cash-on-cash return measures your actual cash yield on the cash you invested, which does include mortgage payments. Cap rate is useful for comparing properties regardless of how they are financed; cash-on-cash return is more relevant for evaluating your specific leveraged investment. A property can have a 6% cap rate but an 8% CoC return if low mortgage rates amplify your cash yield.
Net Operating Income equals effective gross income (gross rent minus vacancy loss) minus all operating expenses except the mortgage. Operating expenses include property taxes, insurance, maintenance, property management fees, and utilities paid by the landlord. NOI explicitly excludes mortgage principal and interest payments, which is why cap rate (NOI ÷ property value) is financing-neutral. For the same property, NOI is the same whether you paid cash or took a mortgage.
A standard rule of thumb is 5–10% vacancy for single-family homes in stable markets, meaning the property sits empty about one month per year or slightly less. Multi-family properties and properties in high-demand urban markets often achieve 3–5% vacancy. Properties in lower-demand areas or with higher tenant turnover may see 10–15%. When in doubt, use 8% (just under one month empty) as a conservative baseline — overestimating vacancy is almost always better than underestimating it when projecting cash flows.
Operating expenses for a typical single-family rental include property taxes (often 1–2% of value annually), insurance ($100–200/month typical), maintenance and repairs (budget 1% of property value per year or 10% of rent as a rule of thumb), and property management fees if you hire a manager (8–10% of gross rent is typical). Capital expenditure reserves for roof, HVAC, and appliance replacements are often underestimated — many investors budget an additional 5–10% of rent for CapEx reserves beyond routine maintenance.
Mortgage rate has a direct and significant impact on monthly cash flow. On a $300,000 loan, the difference between a 6% and 7.5% rate is about $270 per month — at $3,000 monthly rent, that turns a $200 positive cash flow into a $70 loss. Higher rates compress cash-on-cash returns because more of your rental income goes to debt service rather than your pocket. During high-rate environments, investors often focus on cap rate rather than CoC return to compare properties objectively.
Cap rates vary significantly by market and property class. In major urban Class A markets (Manhattan, San Francisco, coastal cities), cap rates of 3–5% are typical — investors accept lower yields for perceived appreciation and stability. In suburban residential markets, 5–7% is common. In high-yield B and C class markets in the Midwest and South, cap rates of 7–10% or higher are achievable, though with higher vacancy risk and management intensity. The calculator includes a US market benchmark table for quick comparison.
No — the calculator focuses on cash flow and yield metrics that are knowable today. Property appreciation is speculative and varies enormously by location, holding period, and market cycle. Many profitable-looking real estate investments on paper rely heavily on appreciation assumptions that do not materialize. Cash flow positive investing — where the property covers its costs and generates income even without appreciation — is the more conservative and reliable investment model, and that is what this tool measures.
The calculator uses the standard fixed-rate mortgage formula: Monthly Payment = Loan Amount × r × (1+r)^n ÷ ((1+r)^n − 1), where r is the monthly interest rate (annual rate ÷ 12) and n is the total number of payments (loan term in years × 12). This is purely the principal and interest payment — it does not include property tax and insurance escrow that lenders often collect alongside P&I. The calculator treats property tax and insurance as separate operating expense inputs.
Gross yield (gross rent ÷ property value) is the quickest screening metric — it ignores vacancy and expenses and is useful for a first-pass comparison across many properties. Cap rate is more accurate because it accounts for vacancy and operating expenses, giving you the net return on property value. Cap rate is the professional standard for comparing investment properties. Cash-on-cash return is the most relevant for evaluating your specific financed deal. Use all three in sequence: gross yield to screen, cap rate to compare, and CoC to evaluate your specific financing.
Also known as
rental property calculatorinvestment property ROI calculatorbuy to let calculatorrental income calculatorreal estate ROI calculatorcash on cash return calculator