Rental Property Calculator — Cash Flow, Cap Rate & ROI
Free rental property calculator for US real estate investors. Estimate monthly cash flow, cap rate, cash-on-cash return, DSCR, GRM, break-even occupancy, and multi-year ROI — using actual loan amortization for accurate equity buildup.
1. Property Details
2. Income & Expenses
3. Appreciation & Tax
4. Reference & Notes
RENTAL PROPERTY ANALYSIS
Real Estate Investment Summary
Reference: RP-2026-001
Date:
Purchase Price$300,000.00
Down Payment$60,000.00
Monthly Rent$2,000.00
Monthly Cash Flow$350.00
Cash on Cash Return7.0%
Cap Rate5.5%
Total ROI (5 Years)42.5%
Total Profit$85,000.00
Annual Cash Flow Breakdown
Gross Rent$24,000.00
Vacancy Loss-$1,200.00
Operating Expenses-$9,720.00
Mortgage (P&I)-$18,207.53
Net Operating Income$13,080.00
Annual Cash Flow-$5,127.53
Key Investment Metrics
Gross Rent Multiplier12.5
Debt Service Coverage1.48
Break-Even Occupancy75.0%
Equity at Sale$85,000.00
Rental Property Formula
Cash Flow = NOI − Annual Mortgage (P&I) · NOI = Effective Gross Income − Operating Expenses
Cap Rate = NOI ÷ Purchase Price · Cash-on-Cash = Annual Cash Flow ÷ Cash Invested
This property generates $350/month cash flow with a 7% cash-on-cash return.
Notes
Rental property investment analysis
This calculation is for informational and educational purposes. Actual rental property returns depend on market conditions, tenant quality, financing terms, and local regulations. Consult a licensed real estate professional or CPA for investment decisions.
Prepared By
Date
GUIDE
How to Use This Rental Property Calculator
This free rental property calculator models the full economics of a US
rental investment: purchase price, financing, operating expenses, cash flow, and total
return over your holding period. Enter your numbers and the calculator shows
monthly cash flow, NOI, cap rate,
cash-on-cash return, DSCR, GRM,
break-even occupancy, and total ROI using actual loan
amortization. If you're comparing financing options, run the numbers alongside our
APR calculator and
home loan calculator.
1
Enter Property Details
Purchase price, down payment, loan term, interest rate, closing costs, and renovation costs.
Annual appreciation rate, holding period, income tax rate, and selling costs.
4
Review Cash Flow & Returns
Monthly cash flow, NOI, cap rate, cash-on-cash, DSCR, GRM, break-even occupancy, and total ROI.
5
Save, Print or Export
Save a draft, print the analysis, or download a PDF for your records.
REAL ESTATE EDUCATION
What Does a Rental Property Calculator Calculate?
A rental property calculator — sometimes called an
investment property calculator or real estate cash flow
calculator — converts the price, financing, income, and expenses of a rental
into the metrics investors use to decide whether to buy.
Key rental property metrics
Monthly Cash Flow: Rent minus vacancy, operating expenses, and the mortgage payment.
Net Operating Income (NOI): Effective gross income minus operating expenses — the property's unlevered earnings.
Cap Rate: NOI divided by purchase price — the property's unlevered yield.
Cash-on-Cash Return: Annual pre-tax cash flow divided by total cash invested (down payment + closing + renovation).
Debt Service Coverage Ratio (DSCR): NOI divided by annual debt service — the lender's safety margin.
Gross Rent Multiplier (GRM): Purchase price divided by gross annual rent — a quick screening metric.
Break-Even Occupancy: The occupancy level required to cover all cash expenses and debt service.
Total ROI: Combined cash flow and equity gain over the holding period, divided by cash invested.
Who can use this rental property calculator?
First-Time Rental Investors: Screen deals before making an offer.
Experienced Investors: Compare properties and financing scenarios side by side.
Real Estate Agents: Show clients the numbers behind a listing.
House Hackers: Model owner-occupied multi-family cash flow.
Syndicators and Fund Managers: Quick-check underwriting assumptions.
METHODOLOGY
Rental Property Calculator Methodology
MoneyTool uses standard US real estate investment formulas. The calculator is transparent
about what it does and does not capture.
1. Mortgage payment (P&I)
For a loan with principal P, monthly rate r, and n monthly payments:
M = P × r × (1 + r)n ÷ ((1 + r)n − 1)
When the rate is zero, the payment is P ÷ n.
2. Net Operating Income (NOI)
Effective Gross Income = Annual Rent − Vacancy Loss
The calculator amortizes the loan year by year to determine the
remaining balance at sale. This is critical for an accurate equity
figure — using the original loan balance overstates debt and understates profit.
Sale Price = Purchase Price × (1 + Appreciation)years
Net Sale Proceeds = Sale Price − Selling Costs − Remaining Loan Balance
Total Profit = Net Sale Proceeds + Cumulative Cash Flow − Cash Invested
Total ROI = (Total Profit ÷ Cash Invested) × 100
Important assumptions
Rent, vacancy, and expenses are constant over the holding period.
Rent and expenses are not inflated — the model uses today's dollars.
Depreciation, capital gains tax, 1031 exchanges, and closing costs at sale are not modeled.
Property tax reassessment and rent control are not modeled.
This is a screening estimate, not a full real estate underwriting model.
Not a substitute for professional real estate, tax, or financial advice.
MoneyTool separates calculation results from financial education and personalized
investment advice. The calculator uses documented real estate investment formulas,
while external guidance should be verified with authoritative sources.
Author and editorial responsibility
Methodology reviewed by the
MoneyTool Finance Expert Team,
a group of accountants, CPAs, and personal-finance analysts who maintain
MoneyTool's calculator library and financial education content.
Last reviewed:
| US real estate investment metrics
Next review: When calculation logic, supported inputs, or relevant guidance changes.
Authoritative U.S. real estate and finance resources
Internal Revenue Service (IRS) — Rental Income & Expenses:IRS Topic 414: Rental Income and Expenses
covers how the IRS treats rental income, deductible expenses, and depreciation.
IRS — Residential Rental Property (Publication 527):IRS Publication 527
is the definitive US tax guide for residential rental property owners.
Consumer Financial Protection Bureau (CFPB) — Owning a Home:CFPB Owning a Home
is the official consumer guide to homebuying and mortgage financing.
Consumer Financial Protection Bureau (CFPB) — Mortgages:CFPB Mortgage Tools
covers Loan Estimates, closing disclosures, and mortgage shopping tools.
U.S. Department of Housing and Urban Development (HUD):HUD Buying a Home
provides federal housing guidance and information on FHA programs.
Federal Housing Finance Agency (FHFA):FHFA
is the regulator of Fannie Mae and Freddie Mac and publishes conforming loan limits.
U.S. Securities and Exchange Commission (SEC) — Investor.gov:SEC Investor.gov
provides investor education on return, risk, and real estate investment vehicles (REITs, etc.).
U.S. Small Business Administration (SBA):SBA Loan Programs
covers SBA-backed financing that some investors use for small commercial property.
External resources are provided for education and verification. MoneyTool is not affiliated
with or endorsed by the IRS, CFPB, HUD, FHFA, SEC, or SBA.
BEST PRACTICES
Tips for Rental Property Investing
A single spreadsheet number rarely tells the full story. Pair cash flow with reserves,
inspections, and local market research before committing capital.
📊
Model Real Expenses
Include maintenance, vacancy, management, and capital reserves — not just the mortgage and taxes.
📈
Target Positive Cash Flow
Positive cash flow protects you through vacancies and unexpected repairs.
💰
Verify Market Rents
Confirm rents with local comps — do not rely on seller projections or the 1% rule alone.
🎯
Weigh Appreciation vs Yield
Low cap-rate markets often trade appreciation for cash flow. Pick the mix that matches your strategy.
🔄
Review Annually
Rents, taxes, insurance, and interest rates change. Re-run the analysis each year.
✅
Consult Professionals
Use a CPA for tax strategy and a licensed agent or attorney for transactions.
RELATED CALCULATORS
Explore More Business Calculators
Complete your business and investment planning with our suite of business calculators:
Frequently Asked Questions About Rental Property Investing
What is a good cash-on-cash return for rental property?
Most US rental property investors target a cash-on-cash return between 8% and 12%, though acceptable returns vary by market, property class, and financing terms.
What is the 1% rule in real estate?
The 1% rule says monthly rent should be at least 1% of the purchase price. A $300,000 property should rent for at least $3,000 per month to meet the rule. It is a rough screening filter, not a full analysis.
What is a good cap rate for a rental property?
A good cap rate generally ranges from 4% to 10% depending on the market. Lower cap rates often indicate lower-risk, appreciating markets; higher cap rates indicate higher-yield, higher-risk markets.
What is DSCR and what is a good DSCR?
Debt Service Coverage Ratio (DSCR) is Net Operating Income divided by annual debt service. Most lenders require a minimum DSCR of 1.20 to 1.25. Higher DSCRs give more cushion against vacancy and expense surprises.
What expenses should I include for a rental property?
Include mortgage payments (principal and interest), property taxes, landlord insurance, maintenance and repairs, property management fees, HOA dues, utilities, and a vacancy allowance.
Is this rental property calculator free?
Yes. MoneyTool provides this rental property calculator free for educational and planning use.
Can I save my rental property analysis?
Yes. Save Draft stores the calculator inputs in your browser. Print Results and Download PDF can be used to keep a copy of the displayed analysis.
LEGAL
Rental Property Calculator Disclaimer
This rental property calculator provides estimates for informational and educational
purposes. It does not constitute financial, legal, tax, accounting, or investment
advice. Actual returns depend on market conditions, tenant quality, financing terms,
local regulations, tax treatment, and other factors not modeled here.
Estimates only: Results depend on the inputs and assumptions described in the methodology.
Not an appraisal or underwriting: The calculator does not perform a property appraisal or lender underwriting.
Tax treatment not modeled: Depreciation, capital gains, and 1031 exchanges are not included.
Verify before investing: Confirm rents, expenses, and financing with a licensed real estate professional, CPA, or attorney.
Last methodology review: .
Calculator logic and educational content should be reviewed again whenever the methodology,
supported inputs, or relevant external guidance changes.
