Rental Property Calculator

This rental property calculator shows cash flow, cap rate, and investment returns. Enter property details to analyze any rental investment instantly.

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Property & Purchase Details
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Rental Income & Expenses
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Analyze your rental property's cash flow, ROI, and profitability. Includes mortgage payment, operating expenses, and cash-on-cash return.

Investment Summary
💰 Monthly Cash Flow: —
Total Investment (Down Payment + Costs)
Loan Amount
Monthly Mortgage Payment (P&I)
Gross Monthly Rent
Vacancy Loss
Effective Gross Income (Monthly)
Total Monthly Expenses
Monthly Cash Flow
Annual Cash Flow
Cash-on-Cash Return (CoC)
Cap Rate
Annual Cash Flow Projection
YearAnnual IncomeAnnual ExpensesAnnual Cash Flow

Enter property details to view cash flow projection.

Shows annual cash flow projection assuming 3% annual rent growth and 2% expense growth.

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Creator & Reviewer

Hasnain Khan

Co-Founder, Techraxy

Hasnain Khan is a digital tools developer and Co-Founder of Techraxy, a platform dedicated to building modern web-based calculators and utility tools. He focuses on tool optimization, website performance, and creating accessible user experiences across categories like automotive, finance, construction, and everyday utilities.

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Introduction to Rental Property Calculator

Investing in rental property can build wealth through cash flow, appreciation, and tax benefits. But not every property makes a good investment. This Rental Property Calculator helps you analyze any potential deal using key metrics: net operating income (NOI), cap rate, cash flow, cash-on-cash return, and total ROI. Enter the property price, down payment, interest rate, rental income, vacancy rate, operating expenses, and more. The calculator shows your monthly cash flow, annual returns, and whether the property meets your investment goals. You can also see how changes in rent, expenses, or financing affect your returns. Toolraxy built this calculator to help both new and experienced investors make confident, data-driven decisions when evaluating rental properties.

How to Use This Rental Property Calculator

            1. Enter the Property Price (purchase price)

            2. Enter your Down Payment (dollar amount or percentage)

            3. Enter the Interest Rate (current mortgage rate)

            4. Select the Loan Term (15 or 30 years typical)

            5. Enter Monthly Rental Income (expected monthly rent)

            6. Enter Vacancy Rate (percentage of units vacant, typically 5-10%)

            7. Enter Annual Operating Expenses (taxes, insurance, maintenance, property management)

            8. Enter Closing Costs (estimated percentage of purchase price)

            9. Enter Annual Repairs (maintenance and repair budget)

            10. Click Calculate to analyze your rental property investment

Formula Section

Loan amount:

Loan Amount = Property Price – Down Payment

Monthly mortgage payment (principal + interest):

Monthly Payment = Loan Amount × [ r(1+r)^n ] / [ (1+r)^n – 1 ]

Gross rental income (annual):

Gross Annual Income = Monthly Rent × 12

Vacancy allowance:

Vacancy Allowance = Gross Annual Income × (Vacancy Rate ÷ 100)

Effective gross income:

Effective Gross Income = Gross Annual Income – Vacancy Allowance

Annual operating expenses:

Total Expenses = Operating Expenses + Repairs + Property Management

Net operating income (NOI):

NOI = Effective Gross Income – Total Expenses

Annual debt service:

Annual Debt Service = Monthly Payment × 12

Annual cash flow:

Annual Cash Flow = NOI – Annual Debt Service

Monthly cash flow:

Monthly Cash Flow = Annual Cash Flow ÷ 12

Total cash invested:

Total Invested = Down Payment + (Property Price × Closing Costs ÷ 100)

Cap rate:

Cap Rate = (NOI ÷ Property Price) × 100

Cash-on-cash return:

Cash-on-Cash Return = (Annual Cash Flow ÷ Total Invested) × 100

Total return on investment (ROI) with appreciation:

ROI = ((Annual Cash Flow × Holding Years) + Appreciation) ÷ Total Invested × 100

Where:

  • r = Monthly interest rate (annual rate ÷ 12 ÷ 100)

  • n = Total months in loan term (years × 12)

  • NOI = Net Operating Income

  • Cap Rate = Return based on property value

  • Cash-on-Cash = Return based on actual cash invested

Real-Life Examples Section

  • Example scenario:

    • Property price: $350,000

    • Down payment: $70,000 (20%)

    • Interest rate: 6.5%

    • Loan term: 30 years

    • Monthly rent: $2,200

    • Vacancy rate: 5%

    • Operating expenses: $3,600 (taxes, insurance)

    • Property management: $2,640 (10% of rent)

    • Annual repairs: $1,500

    • Closing costs: 2%

    • Holding period: 5 years

    • Annual appreciation: 3%

    Results:

    • Loan amount: $280,000

    • Monthly mortgage payment: $1,770

    • Gross annual income: $26,400

    • Vacancy allowance: $1,320

    • Effective gross income: $25,080

    • Total expenses: $7,740

    • Net operating income (NOI): $17,340

    • Annual debt service: $21,240

    • Annual cash flow: -$3,900 (negative cash flow)

    • Monthly cash flow: -$325

    • Total cash invested: $77,000

    • Cap rate: 5.0%

    • Cash-on-cash return: -5.1%

    Scenario improvement (raise rent to $2,500/month):

    • Monthly cash flow: $64 (positive)

    • Cash-on-cash return: 5.0%

    • Cap rate: 6.2%

    Clear takeaway: At $2,200 rent, this property has negative cash flow of $325/month. Raising rent to $2,500 turns it cash-flow positive with a 5% cash-on-cash return. Use this calculator to find the minimum rent needed for profitability.

 

FAQs

1. What is a rental property calculator?
A rental property calculator analyzes an investment property’s potential returns. It calculates key metrics including cash flow, cap rate, cash-on-cash return, and ROI based on property price, rent, expenses, and financing.

2. What is a good cash-on-cash return for rental property?
Most investors target 8-12% cash-on-cash return. Some accept 6-8% for stable properties in prime areas. Higher returns (12%+) are possible in growing markets or with value-add opportunities but may come with higher risk.

3. What is a good cap rate for rental property?
Cap rates vary by location and property type. Generally, 4-6% for prime, stable properties; 6-8% for solid investments in secondary markets; 8-10%+ for properties in emerging markets or with higher risk.

4. What is the 1% rule in real estate?
The 1% rule states that monthly rent should be at least 1% of the purchase price. For a $350,000 property, this means at least $3,500/month rent. This is a quick screening tool, not a definitive analysis.

5. What is the 50% rule for rental expenses?
The 50% rule estimates that operating expenses (excluding mortgage) will be about 50% of gross rental income. For $2,200 rent, expenses would be $1,100/month. This is a rough estimate; actual expenses vary.

6. What is net operating income (NOI)?
NOI is the income a property generates after operating expenses but before mortgage payments and taxes. NOI = Gross Income – Vacancy – Operating Expenses. It is used to calculate cap rate.

7. What is the difference between cap rate and cash-on-cash return?
Cap rate is based on property value (NOI ÷ Property Value). Cash-on-cash return is based on actual cash invested (Cash Flow ÷ Cash Invested). Cap rate ignores financing; cash-on-cash includes financing impact.

8. How much should I budget for repairs and maintenance?
Plan to budget 1-2% of the property value annually for repairs and maintenance. For a $350,000 property, $3,500-$7,000 per year. Use this calculator’s repair input to include this in your analysis.

Disclaimer

This Rental Property Calculator is provided for educational and planning purposes only. Results are based on standard real estate formulas and the numbers you enter. Actual property investments involve additional factors including market fluctuations, property condition, tenant quality, and unpredictable expenses. This tool does not constitute financial or real estate investment advice. Consult a licensed real estate professional or financial advisor before making investment decisions. Toolraxy is not responsible for any actions taken based on these calculations.

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