Rental Property Cash Flow Calculator

Estimates are educational only. Taxes, financing, depreciation, and local rules vary.

Property Details

Property name

Property address

Property type

Currency

Total rental units

Expected rented units

Occupancy rate (%)

Used as an additional occupancy assumption.

Annual appreciation (%)

Rental Income

Monthly rent per unit

Parking income monthly

Laundry income monthly

Storage income monthly

Pet fees monthly

Utility reimbursements monthly

Other income monthly

Purchase and Financing

Purchase price

Down payment (%)

Down payment amount

Loan type

Interest rate (%)

Loan term (years)

Closing costs

Loan fees

Initial renovation costs

Operating Expenses

Direct expense entry basis

Property taxes

Property insurance

HOA fees

Utilities

Landscaping

Pest control

Security

Accounting

Legal

Advertising

Cleaning

Miscellaneous

Percentage or Amount Based Assumptions

Management fee mode

Maintenance mode

Vacancy mode

CapEx reserve mode

Capital Expenditure Reserves

Roof reserve monthly

HVAC reserve monthly

Appliance reserve monthly

Plumbing reserve monthly

Major renovation reserve monthly

Custom reserve monthly

Tax Options

Estimate tax effects

Estimated income tax rate (%)

Annual depreciation

Other annual deductions

Future Projection

Projection period (years)

Annual rent increase (%)

Annual expense inflation (%)

Sale Analysis

Expected selling price

Leave zero to use projected property value.

Selling costs (%)

Estimated capital gains tax (%)

Investment Results

Calculated estimate

Monthly Cash Flow

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Annual Cash Flow

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Net Operating Income

—

Monthly Mortgage

—

Cap Rate

—

Cash-on-Cash Return

—

DSCR

—

Break-Even Occupancy

—

Effective Monthly Income

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Monthly Operating Costs

—

Total Cash Invested

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After-Tax Cash Flow

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Metric	Value	Meaning
Gross rent multiplier	—	Purchase price divided by annual gross rent.
Operating expense ratio	—	Operating expenses as a share of effective income.
Simple annual ROI	—	Annual cash flow compared with total cash invested.
Annual yield	—	Annual cash flow compared with purchase price.
Equity at projection end	—	Projected property value less mortgage balance.
Estimated sale proceeds	—	Sale price less selling costs, debt, and estimated gains tax.
Estimated taxable rental income	—	NOI less interest, depreciation, and deductions.
Cash flow per unit	—	Monthly cash flow divided by total units.

Scenario Comparison

Scenarios vary rent, vacancy, operating costs, and appreciation assumptions.

Scenario	Monthly Cash Flow	Annual Cash Flow	Cap Rate	Cash-on-Cash	10/Selected-Year Value

Year-by-Year Projection

Year	Effective Income	Operating Expenses	NOI	Debt Service	Cash Flow	Property Value	Loan Balance	Equity

Formula Used

Monthly Cash Flow = Effective Rental Income − Operating Expenses − Mortgage Payment

NOI = Effective Gross Income − Operating Expenses

Cap Rate = Annual NOI ÷ Purchase Price × 100

Cash-on-Cash Return = Annual Pre-Tax Cash Flow ÷ Total Cash Invested × 100

DSCR = Annual NOI ÷ Annual Debt Service

How to Use This Calculator

Enter the property price and expected rental income.
Add financing details and your upfront purchase costs.
Enter recurring operating expenses and reserve assumptions.
Choose tax, growth, appreciation, and sale assumptions.
Review cash flow, returns, projections, and scenarios.
Download the results as CSV or PDF when needed.

Understanding Rental Property Cash Flow

Rental cash flow measures money remaining after property costs. Positive cash flow can support reserves and future investments. Negative cash flow means expenses exceed collected operating income.

Start With Realistic Rental Income

Use achievable rent based on comparable local properties. Include parking and other recurring income only when dependable. Vacancy assumptions should reflect your market and tenant turnover.

Count Every Operating Expense

Property taxes and insurance are only the beginning. Maintenance and management can materially change investment performance. Reserves also protect cash flow from larger future repairs.

Separate NOI From Financing

Net operating income excludes mortgage principal and interest. This makes NOI useful when comparing different properties. Financing is then applied to estimate actual investor cash flow.

Use Return Metrics Together

Cap rate compares NOI with the property purchase price. Cash-on-cash return focuses on the investor's actual cash. DSCR shows whether property income comfortably supports scheduled debt.

Consider Long-Term Growth

Rent increases may improve future cash flow over time. Expenses can also rise through inflation and property aging. Appreciation affects equity but does not guarantee monthly liquidity.

Stress-Test Your Assumptions

A conservative scenario can reveal hidden investment weaknesses early. Test lower rent and higher vacancy before buying. Compare results against your required return and risk tolerance.

Plan for an Eventual Sale

Selling costs reduce the amount received at exit. Remaining debt must also be paid from sale proceeds. Taxes can further reduce the investor's final realized return.

Compare Cash Flow With Reserves

Strong monthly cash flow still needs adequate emergency reserves. Unexpected vacancies can create temporary pressure on property finances. Keep separate liquidity for insurance deductibles and urgent repairs.

Review Results Regularly

Actual rents and expenses change after property acquisition. Update the calculator whenever contracts or financing conditions change. Better records produce more useful investment decisions over time.

Example Rental Property Data

Example Item	Sample Value	Why It Matters
Purchase price	$300,000	Used for financing, cap rate, and equity calculations.
Monthly rent	$1,800	Primary source of recurring property income.
Vacancy allowance	5%	Reduces potential income to a realistic level.
Management fee	8%	Represents professional property management costs.
Interest rate	6.5%	Determines financing cost and monthly debt service.
Annual appreciation	3%	Used for long-term property value projections.

Frequently Asked Questions

What is good rental property cash flow?

Good cash flow is positive after realistic expenses and financing. Your target depends on risk, market, and required returns.

Does mortgage principal count as an operating expense?

No. Mortgage payments are financing costs. NOI is calculated before debt service.

What is a reasonable vacancy rate?

Vacancy varies by market and property type. Use recent local rental data when possible.

Why include a maintenance reserve?

Repairs are irregular but unavoidable. A reserve creates a steadier long-term cash estimate.

What does cash-on-cash return measure?

It compares annual pre-tax cash flow with invested cash. It is useful for leveraged property comparisons.

Is appreciation included in monthly cash flow?

No. Appreciation increases estimated property value, not spendable monthly rental income.

Are tax estimates exact?

No. Depreciation, deductions, local rules, and personal tax circumstances vary significantly.

How often should I recalculate property performance?

Use conservative assumptions and review property performance every year.