Plug in a property's numbers above and get an instant estimate of cash flow, ROI, and rental property income. This free rental property calculator helps you size up a deal in minutes, whether you're buying your first rental or evaluating your tenth.
Enter the purchase price, expected monthly rent, expenses, and financing details. The calculator returns the numbers that matter: net cash flow, cash on cash return, and overall return on investment.
Every result is an estimate. Use it as a starting point for deeper research, not as a substitute for professional financial advice.
Use the Rental Property Calculator to Analyze a Property
Start by gathering a few key details about the property you want to analyze. The calculator needs inputs you can usually find in a listing, a loan estimate, or a quick online search.
Here's what to have ready:
- Purchase price. The total price of the property, including any closing costs you want to factor in.
- Down payment. The cash you plan to put into the deal upfront.
- Loan terms. Interest rate, loan length, and monthly mortgage payment (or let the calculator estimate the payment for you).
- Monthly rent. Your expected gross rental income. Check local comps on listing sites for a realistic number.
- Vacancy rate. The percentage of time you expect the unit to sit empty. 5% to 10% is common for most markets.
- Operating expenses. Property tax, insurance, property management fees, maintenance, and repairs.
Once you fill in those fields, the calculator returns your estimated monthly cash flow, annual rental income, and ROI. You can adjust any input and rerun the numbers instantly to compare scenarios.
Trying to decide whether to rent or sell your property? Run the rental side first. If the cash flow and ROI look weak after realistic expenses, selling may make more sense.
How the Calculator Works
The rental property calculator follows a straightforward formula behind the scenes.
Step 1: Estimate gross rental income. Multiply your expected monthly rent by 12 to get annual rental income. The calculator then subtracts a vacancy allowance based on the rate you entered.
Step 2: Subtract operating expenses. Property tax, insurance, maintenance, and property management fees are deducted from gross income. What remains is your net operating income (NOI), the money the property earns before debt payments.
Step 3: Subtract mortgage payments. If you're financing the purchase, the annual mortgage cost comes out of NOI. The result is your annual cash flow.
Step 4: Calculate returns. The calculator divides annual cash flow by your total cash invested (down payment plus closing costs) to produce a cash on cash ROI. It may also show a broader return on investment that factors in estimated property appreciation and loan paydown over time.
All of these outputs are estimates. Actual returns depend on real vacancy, surprise repairs, and market shifts that no calculator can predict.
Rental Property Income Calculator: Estimate Rent and Rental Property Income
Monthly rental income is the engine of any rental property investment. Getting this number right matters more than almost any other input.
How to estimate rent. Search current listings for comparable units in the same neighborhood. Match by bedroom count, square footage, and condition. Average the asking rents of three to five similar properties for a reasonable starting figure.
Gross vs. net rental income. Gross rental income is the total rent collected before any expenses. Net rental income is what's left after you subtract vacancy loss, property tax, insurance, management fees, maintenance, and mortgage payments. The calculator shows both so you can see where the money goes.
A few factors that affect your potential rental income:
- Location and school district
- Number of bedrooms and bathrooms
- Property condition and recent updates
- Local vacancy rates and seasonal demand
- Whether you allow pets (pet rent can add $25 to $75/month)
If you plan to manage the property yourself, include a property management fee anyway (typically 8% to 10% of monthly rent). This accounts for the value of your time and gives you a realistic picture if you ever hire a property manager later.
Calculate ROI on Rental Property and Return on Investment
Return on investment measures how hard your money is working. For rental properties, ROI tells you whether a deal beats other places you could park that cash, like index funds or bonds.
The simplest ROI formula for a rental property:
ROI = (Annual Cash Flow ÷ Total Cash Invested) × 100
Total cash invested includes your down payment, closing costs, and any upfront renovation costs. This gives you a percentage you can compare across properties or asset classes.
A broader calculation adds equity buildup (loan principal paid down by tenants) and property appreciation. Those gains are real but not liquid. You only capture them when you sell or refinance.
What is a good ROI for rental properties?
Most real estate investors target a cash on cash ROI of 8% to 12%. Some markets support higher returns. Others, especially expensive coastal cities, may offer 4% to 6% cash returns but rely on appreciation for total return.
A "good" ROI depends on your goals:
- Cash flow focused. Look for 8%+ cash on cash return.
- Appreciation focused. Accept lower cash returns in markets with strong price growth.
- Balanced. Aim for positive cash flow plus moderate appreciation potential.
There's no universal answer. Compare the projected return to what you'd earn in a diversified stock portfolio (historically around 7% to 10% annually) and factor in the time and effort of being a landlord.
Cash on cash ROI and cash ROI
Cash on cash ROI isolates the return on the actual dollars you put into the deal. It ignores appreciation and loan paydown. This makes it the most practical metric for comparing properties side by side.
Cash on Cash ROI = Annual Pre-Tax Cash Flow ÷ Total Cash Invested
Example: You invest $50,000 (down payment plus closing costs). The property produces $5,000 in annual cash flow after all expenses and mortgage payments. Your cash on cash ROI is 10%.
This number is especially useful when you're financing the purchase. Leverage amplifies cash on cash returns because you control an asset worth far more than your cash investment.
ROI calculator vs. investment property calculator
These terms often mean the same thing. Both estimate returns on a rental property purchase.
Some investment property calculators include extra features like amortization schedules, tax benefit estimates (depreciation, mortgage interest deductions), or side-by-side property comparisons. An ROI calculator typically focuses on the return percentage.
The calculator on this page covers the core metrics: cash flow, cash on cash ROI, and total return on investment. For detailed tax projections, consult a CPA who specializes in real estate investment.
Cash Flow for Rental Property Investment
Cash flow is the money left in your pocket each month after every bill is paid. Positive cash flow means the property pays for itself and then some. Negative cash flow means you're covering the shortfall out of your own pocket.
Monthly Cash Flow = Monthly Rent − Vacancy Loss − Operating Expenses − Mortgage Payment
Here's a breakdown of typical rental property expenses to include:
| Expense | Typical Range |
|---|---|
| Property tax | Varies by location |
| Insurance | $75 to $200/month |
| Property management fees | 8% to 10% of rent |
| Maintenance and repairs | 1% of property value/year |
| Vacancy allowance | 5% to 10% of rent |
| Capital expenditures reserve | 5% to 10% of rent |
The 50% rule is a quick screening tool: assume roughly half of gross rent goes to operating expenses (not including the mortgage). If monthly rent is $2,000, budget about $1,000 for expenses before the mortgage payment. It's a rough estimate, not a precise formula, but it helps you filter out bad deals fast.
Positive cash flow is the primary goal for most landlords. Even $100 to $200 per month per unit adds up and provides a cushion for surprise repairs.
Types of Rental Properties and Real Estate Investment
Not every rental property works the same way. The type you choose affects your cash flow, management burden, and ROI.
- Single-family homes. One unit, one tenant. Easier to finance and manage. Appreciation tends to track owner-occupied housing prices.
- Small multifamily (2 to 4 units). Duplexes, triplexes, and fourplexes. Still eligible for residential financing. Multiple rental units reduce vacancy risk because one empty unit doesn't wipe out all income.
- Large multifamily (5+ units). Requires commercial financing. Higher management complexity. Often managed by a property management company.
- Condos and townhomes. Lower maintenance for the property owner. HOA fees can eat into cash flow.
- Vacation and short-term rentals. Higher potential income per night but more management, turnover, and regulation risk.
Each type fits different investors. A first-time real estate investor buying a duplex and living in one unit (house hacking) faces very different numbers than someone purchasing a 20-unit apartment building.
Use the calculator to run scenarios for any type. Adjust rent, vacancy, and expenses to match the property category you're evaluating.
Use the Rental for Investment Property as a Landlord
Being a landlord means more than collecting rent. The calculator helps you budget for the real costs of owning and managing a rental property.
Property management: DIY or hire out? Self-managing saves 8% to 10% of gross rent. But it costs your time: screening tenants, handling maintenance calls, navigating lease disputes, and staying current on landlord-tenant law. If your time is valuable, hiring a property manager may actually improve your effective ROI.
Why include management fees even if you self-manage. Your labor has a dollar value. If you don't account for it, you'll overestimate the property's return and underestimate the work. Including the fee also gives you an accurate picture in case you later hire a property management company.
Other landlord costs to plan for:
- Tenant screening and leasing costs
- Legal fees for evictions or lease drafting
- Accounting and tax preparation
- Capital improvements (new roof, HVAC, appliances)
The calculator gives you a framework. Layer in your own local knowledge, and you'll make smarter decisions about buying, holding, or passing on a property.
Calculate the ROI on a Rental Property Before You Sell Your Property
Thinking about selling a rental you already own? Run the numbers through the calculator first to see whether holding is the better move.
To evaluate a property you already hold:
- Enter the current market value as the purchase price.
- Set the down payment to your current equity (market value minus remaining loan balance).
- Input your actual rent, expenses, and mortgage payment.
- Review the cash on cash ROI based on today's equity position.
If your equity has grown significantly but cash flow hasn't kept pace, your return on that locked-up equity may be low. You might earn more by selling, paying off the loan, and reinvesting the proceeds into a higher-yielding property or another asset class.
On the other hand, if the property still delivers strong cash flow relative to your equity, holding may be the right call. Property appreciation, continued loan paydown, and tax advantages (like depreciation) all factor into the decision.
This is a complex choice with tax implications (capital gains, depreciation recapture, 1031 exchanges). Use the calculator results as a conversation starter with your accountant, not as a final answer.
Free Rental Property Calculator for Rental Properties
This rental property calculator is completely free. No account required. No email gate. No upsell.
You can run unlimited scenarios. Compare different properties by adjusting the purchase price, rent, and expenses. Save or screenshot results to revisit later.
What the calculator does well:
- Estimates monthly and annual cash flow
- Calculates cash on cash ROI and total return on investment
- Shows how vacancy and expenses reduce rental property income
- Lets you test different financing scenarios quickly
What it doesn't do:
- Account for specific tax benefits like depreciation schedules or 1031 exchanges
- Replace a professional appraisal or inspection
- Guarantee future rent, appreciation, or expenses
- Provide legal, tax, or financial advice
The calculator estimates. Your due diligence confirms. Use both.
Income calculator and ROI for rental properties
Combining income and ROI analysis in one tool saves time. Instead of running separate spreadsheets for rental income and return calculations, you get both answers from a single set of inputs.
Here's how to get the most out of the results:
- Compare properties. Run two or three deals side by side. The one with the best cash on cash ROI relative to its risk profile is usually the strongest candidate.
- Stress test. Raise the vacancy rate to 15% or drop rent by 10%. If the property still shows positive cash flow, it can survive a downturn.
- Track over time. Revisit the calculator annually with updated rent and expense figures. Your ROI changes as rents rise, loans amortize, and property values shift.
A rental property calculator can help you screen dozens of deals quickly. The best investors use tools like this to narrow the field, then dig deeper with inspections, market research, and professional advice before writing an offer.