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Rental Property Calculator

Use this rental property calculator to compare a finance scenario for rental property with visible assumptions and source notes.

Primary answer
Net operating income
Inputs to verify
Purchase price, Down payment, and Closing costs
Use type
Use as a review-only estimate; verify before relying on it.
Keyword intent
rental property calculator

Calculator

Rental Property Calculator

Calculates net operating income from purchase price, down payment, closing costs. Defaults are filled in so you can review a working example before changing inputs.

USD

Property purchase price used for cap rate.

USD

Cash down payment included in cash invested.

USD

User-entered upfront closing costs.

USD

Upfront repairs or improvements included in cash invested.

More inputs5 additional assumptions
USD/month

Expected monthly rental income before vacancy.

USD/month

Parking, laundry, storage, or other user-entered income.

%

Percent of scheduled income modeled as vacancy or collection loss.

USD/month

Monthly operating expenses excluding mortgage debt service.

USD/month

Monthly debt service used for cash flow and DSCR.

Result

Result reflects the current submitted inputs.

  • Risk C
  • Reviewed 2026-05-26
  • 3 sources
Net operating income20,040 USD/year
Annual cash flow4,440 USD/year
Cap rate6.68%
Cash-on-cash return6%
Debt service coverage ratio1.284615
Gross scheduled income31,200 USD/year
Vacancy loss1,560 USD/year
Effective gross income29,640 USD/year
Operating expenses9,600 USD/year
Annual debt service15,600 USD/year
Cash invested74,000 USD

Breakdown

Vacancy rate
5%
Monthly debt service
1,300 USD/month
  • All income, expense, price, and debt inputs are user-provided assumptions.
  • Operating expenses exclude mortgage debt service.
  • Vacancy is modeled as a percentage of scheduled gross income.
  • Taxes, depreciation, appreciation, rent growth, sale costs, financing approval, legal compliance, and market estimates are excluded.
  • This is educational real-estate finance math, not investment, tax, legal, lending, or insurance advice.

Accuracy notes

Risk level
C
Reviewed
2026-05-26
Sources
3
Primary result
Net operating income

Formula logic is kept in a pure calculator module with fixtures, source notes, and page-visible assumptions.

High-risk estimate

Educational estimate, not advice

This finance calculator is for educational estimates only. It is not financial advice, a lender quote, investment advice, tax advice, legal advice, or a substitute for reviewing actual contracts, disclosures, rates, fees, and local rules.

Check the reviewed sources, assumptions, and formula limits before using this result for a financial, health, or safety decision.

Review cadence: 12 months; next review due 2027-05-26.

Categories

What the result means

Net operating income answers the page's main rental property question. Effective gross income minus operating expenses. Read the main estimate first, then compare it with the assumptions and secondary outputs before using it in a decision. Use annual cash flow, cap rate, and cash-on-cash return to explain why net operating income moved when an input changed. Compare the result with the source document or quote that will actually govern the decision.

Net operating incomeEffective gross income minus operating expenses.
Annual cash flowNOI minus annual debt service.
Cap rateNOI divided by purchase price.
Cash-on-cash returnAnnual cash flow divided by cash invested.

Use the result this way

  1. Start with Net operating income, then use supporting outputs only to explain the primary answer.
  2. Verify purchase price, down payment, and closing costs before copying the result.
  3. Keep units consistent with the labels shown in the form, stay within the documented minimum and maximum ranges, and enter percentages as whole percents, such as 6.5 for 6.5%, unless a field says otherwise.
  4. Compare the result with the source document or quote that will actually govern the decision.

User job

How to use this calculator

Use Rental Property Calculator when you need net operating income, then use annual cash flow and cap rate to check the context for planning conversations, quote comparisons, payment checks, and scenario review.

Best for

  • Comparing one financial scenario with another
  • Preparing questions for a lender, advisor, or statement review
  • Reviewing a default example before entering your own purchase price and down payment.

Check before relying

  • Verify rates, fees, timing, taxes, and local rules against official documents before acting.
  • All income, expense, price, and debt inputs are user-provided assumptions.
  • Operating expenses exclude mortgage debt service.
  • Source context: Office of the Comptroller of the Currency, reviewed 2026-05-26.

Next useful step

  • Real Estate CalculatorUse next when the real estate task needs monthly cash flow instead of net operating income.
  • Rent vs Buy CalculatorUse next when the real estate task needs buying cost minus renting cost instead of net operating income.
  • House Affordability CalculatorUse next when the real estate task needs estimated affordable home price instead of net operating income.

Limits of this estimate

  • Supports educational income-property ratio math only; it excludes underwriting approval, tax depreciation, local compliance, insurance, market rent estimates, appreciation, sale costs, and investment advice.
  • The result depends on user-entered inputs and the documented assumptions; defaults are examples only.
  • Search indexing approval does not downgrade this page from risk level C or turn the result into professional advice.

Formula

NOI equals effective gross income minus operating expenses. Cash flow subtracts debt service. Cap rate, cash-on-cash return, and DSCR are calculated from those user-entered scenario values. Key assumptions: All income, expense, price, and debt inputs are user-provided assumptions. Operating expenses exclude mortgage debt service. Vacancy is modeled as a percentage of scheduled gross income.

  • NOI equals effective gross income minus operating expenses. Cash flow subtracts debt service. Cap rate, cash-on-cash return, and DSCR are calculated from those user-entered scenario values.
  • All income, expense, price, and debt inputs are user-provided assumptions.
  • Operating expenses exclude mortgage debt service.
  • Primary source context: Office of the Comptroller of the Currency.

Inputs

Enter purchase price, down payment, closing costs, and initial repair costs for planning conversations, scenario checks, and lender or statement comparison. Before calculating, keep units consistent with the labels shown in the form, stay within the documented minimum and maximum ranges, and enter percentages as whole percents, such as 6.5 for 6.5%, unless a field says otherwise. Purchase price: Property purchase price used for cap rate. Down payment: Cash down payment included in cash invested. Closing costs: User-entered upfront closing costs. Initial repair costs: Upfront repairs or improvements included in cash invested.

Purchase priceProperty purchase price used for cap rate.
Down paymentCash down payment included in cash invested.
Closing costsUser-entered upfront closing costs.
Initial repair costsUpfront repairs or improvements included in cash invested.
Monthly rentExpected monthly rental income before vacancy.
Other monthly incomeParking, laundry, storage, or other user-entered income.
Vacancy ratePercent of scheduled income modeled as vacancy or collection loss.
Operating expensesMonthly operating expenses excluding mortgage debt service.
Mortgage paymentMonthly debt service used for cash flow and DSCR.

Example

Using the default inputs, Rental Property Calculator returns net operating income of 20,040 USD/year. Adjust purchase price, down payment, closing costs, and initial repair costs to match your own scenario.

FAQ

How is net operating income calculated here?

NOI equals effective gross income minus operating expenses. Cash flow subtracts debt service. Cap rate, cash-on-cash return, and DSCR are calculated from those user-entered scenario values. The first assumption to check is: All income, expense, price, and debt inputs are user-provided assumptions.

What does Net operating income mean for rental property?

Read the main estimate first, then compare it with the assumptions and secondary outputs before using it in a decision. Secondary values such as annual cash flow, cap rate, and cash-on-cash return are there to explain the primary answer, not to replace it.

What should I enter for Purchase price?

Property purchase price used for cap rate. Use USD for this field. Keep units consistent with the labels shown in the form, stay within the documented minimum and maximum ranges, and enter percentages as whole percents, such as 6.5 for 6.5%, unless a field says otherwise.

How does Down payment change net operating income?

Cash down payment included in cash invested. Changing it can alter net operating income because the formula uses the submitted inputs together. Also compare rates, dates, fees, taxes, local rules, compounding, and omitted real-world charges.

Why does the rental property example show 20,040 USD/year for net operating income?

The default inputs produce 20,040 USD/year for net operating income. Treat that as a format and scale check, then replace every default value with your own inputs.

Can the rental property result replace financial advice?

No. Use the rental property result as comparison context only. Market returns, taxes, fees, legal terms, and personal constraints can change the real outcome.

Sources

Last reviewed: 2026-05-26

  • officialReviewed 2026-05-26 · Source Undated page, accessed 2026-05-26
    Comptroller's Handbook: Commercial Real Estate LendingOffice of the Comptroller of the Currency. Debt service coverage ratio and NOI-based lending analysis concepts.
    Scope
    U.S. banking supervision guidance discussing NOI, debt service, DSCR, and real-estate cash flow analysis.
    Supports
    Debt service coverage ratio and NOI-based lending analysis concepts.
    Limits
    Supports educational income-property ratio math only; it excludes underwriting approval, tax depreciation, local compliance, insurance, market rent estimates, appreciation, sale costs, and investment advice.
  • officialReviewed 2026-05-26 · Source Undated page, accessed 2026-05-26
    Monitored Debt Service Coverage RatioFannie Mae Multifamily Guide. DSCR denominator and annual debt service interpretation.
    Scope
    Multifamily guide definition of DSCR as net cash flow divided by debt service.
    Supports
    DSCR denominator and annual debt service interpretation.
    Limits
    Supports educational income-property ratio math only; it excludes underwriting approval, tax depreciation, local compliance, insurance, market rent estimates, appreciation, sale costs, and investment advice.
  • officialReviewed 2026-05-26 · Source Undated page, accessed 2026-05-26
    HUD Housing Notice 2024-05U.S. Department of Housing and Urban Development. NOI definition and separation of operating expenses from debt service.
    Scope
    HUD multifamily housing notice defining net operating income as project income less operating expenses, excluding debt repayment obligations.
    Supports
    NOI definition and separation of operating expenses from debt service.
    Limits
    Supports educational income-property ratio math only; it excludes underwriting approval, tax depreciation, local compliance, insurance, market rent estimates, appreciation, sale costs, and investment advice.

Disclaimer

This finance calculator is for educational estimates only. It is not financial advice, a lender quote, investment advice, tax advice, legal advice, or a substitute for reviewing actual contracts, disclosures, rates, fees, and local rules.