Rental Property Calculator
Analyze the financial performance of a rental property investment. Calculates NOI, cap rate, cash-on-cash return, DSCR, and monthly cash flow.
Calculator
Price you are buying the property at
Fees, title, appraisal at purchase
Percent of the price paid in cash
Annual fixed rate on the mortgage
Estimated rent the unit brings in
Expected portion of the year without a tenant
Annual tax as a percent of the purchase price
Property and liability insurance per year
Property management fee as a share of rent
Maintenance reserve as a share of rent
Homeowners association fee if any
Utilities you cover, landscaping, misc
Property Analysis
Results
Net Operating Income
$17,700.00/yr
Rent income minus operating expenses before debt
-$41.96/mo
NOI minus the monthly mortgage payment
5.90%
Unleveraged return of the property
-0.73%
Return on the cash you actually invested
0.97x
NOI divided by annual debt payments
$69,000.00
Down payment plus closing costs
$12,300.00
Vacancy, taxes, insurance, management, maintenance, HOA, other
$1,516.96/mo
Principal and interest only
The metrics use market-assumed vacancy and expense rates from your inputs rather than the propertys real ledger, so gaps between dealers and your budget come down to how honest the rent, vacancy, and repairs are. A DSCR above 1.25 and positive cash flow usually mean a self-sustaining deal.
Visualizations
Annual Income vs Spending
Annual Expense Make-up
Debt Service Coverage
Cash-on-Cash Return
Formula
This rental property calculator walks from gross rent to the three investing metrics: NOI and cap rate measure the unlevered income, cash flow measures the take-home after the mortgage, and cash-on-cash plus DSCR judge the deal on the cash you put in and the debt you carry.
Alternative Form
Variables
| Symbol | Name | Unit | Description |
|---|---|---|---|
| NOI | Net Operating Income | USD | Annual rent − vacancy and operating expenses |
| Cash Flow | Annual cash flow | USD | NOI minus the annual mortgage payment |
| Cap Rate | Cap rate | % | NOI ÷ purchase price × 100 |
| CoC | Cash-on-cash return | % | Annual cash flow ÷ total cash invested × 100 |
| DSCR | Debt service coverage | ratio | NOI ÷ annual mortgage payments |
| PI | Mortgage payment | USD/mo | Amortized principal and interest |
Explanation
The chain keeps each scale separate: NOI ignores the loan to value the asset (cap rate), cash flow nearly the leverage for the owner, and DSCR measures how the bank sees coverage. The calculator uses the fixed amortization formula for PI and standard NOI per appraisal practice.
Derivation
Total Expenses = Vacancy % × Rent + (Tax % × Price) + Insurance + Mgmt % × Rent + Maint % × Rent + HOA × 12 + Other × 12. NOI = max(0, Rent × 12 − Total Expenses). Monthly PI = P × r(1+r)^N ÷ ((1+r)^N − 1). Cash Flow = NOI − PI × 12. Cap = NOI ÷ Price. CoC = Cash Flow ÷ (Down + Closing). DSCR = NOI ÷ (PI × 12).
Step-by-Step Calculation
Follow each step to understand how the result is calculated from your inputs.
Start with the annual effective rent after vacancy.
Cast operating expenses: taxes, insurance, management, maintenance, HOA, other.
NOI feeds cap rate, the return before leverage.
Add the mortgage: monthly payment from the loan amount.
Cash flow is NOI minus the annual mortgage payment.
Final check on the cash you put in and debt coverage.
Worked Examples
See how the calculator works with different scenarios.
Scenario
A $300,000 rental with $2,500 rent, a 20% down payment, and a 6.5% 30-year mortgage.
Inputs
Calculation
Gross = $30,000; Expenses ≈ $14,242; NOI = $15,758 PI = $1,202/mo; Cash flow = $15,758 − $14,424 = $1,334 yr Cap = 5.25%; CoC = $1,334 ÷ $69,000 = 1.9% DSCR = $15,758 ÷ $14,424 = 1.09
Result
Cap 5.25%, monthly flow ≈ $111, cash-on-cash 1.9%
Interpretation
A stable low-return deal. The lender bar (1.25) fails at this price and rent: it needs a lower price, higher rent, or more down before the cash flow reaches coverage.
Understanding Your Result
Your Result: Net Operating Income: $17,700.00 /yr
Typical range: Single-family cap rates commonly run 4-8%, a healthy cash-on-cash target 8-12%, and lenders want DSCR above 1.25. Markets states and age of the property shift all three.
What This Means
The outputs are a funnel: gross rent flows to NOI, NOI flows to cash flow, and each level is expressed as a ratio (cap rate, cash-on-cash, DSCR) against the price, cash, and debt.
Why It Matters
Rent and price tell you the buy; NOI tells you the property; cash flow tells you the month. Ratios make deals of different size comparable, which is how investors triage dozens of listings.
Professional Interpretation
Appraisers and underwriters value the property through NOI and cap rate, then mark DSCR to the payment. Acting on this order — making the NOI robust before negotiating the cash — separates stable portfolios from noisy ones.
Recommendations
- •Fix the NOI first with a full expense list before you negotiate price
- •A 50% expense ratio is a common sanity floor; your deal over that needs explicit management or repair budget
- •Watch DSCR, not just cash flow: lenders walk a ratio
- •Every 0.25% interest moves the monthly payment — re-run the deal when rates move
- •Keep 3 months of expenses liquid before closing
- •Compare cap rate against local government, not national averages
Educational Content
Introduction
A rental property only makes sense on real numbers. This calculator starts from the purchase price and the rent, then builds an operating income statement: vacancy, taxes, insurance, management, repair reserves, and HOA. What survives becomes your income line.
Concept Explanation
NOI is the core engine: rent minus everything that runs the building. Debt comes next: amortizing principal and interest from the loan amount. The two ratios (cap rate and cash-on-cash) measure return before and after leverage, and DSCR checks the lenders bar.
Applications
Benefits
- •One sheet walks from price to cash flow in a single line
- •Every operation component is a dedicated field — no hidden 50% assumption
- •Ratios are computed with the same formula appraisal and lenders use
- •Instant re-run for compeep, client, and rate changes
- •Totals at the bottom support your own spreadsheet work
Limitations
- •NOI cannot see inside property-specific lease and repair history
- •Cap rate is a snapshot, not a forecast of appreciation-pay flow
- •Cash-on-cash assumes constant rent and expense across the year
- •Taxes, insurance, and vacancy vary sharply by market and state
- •The mortgage is assumed fixed-rate, not adjustable or interest-only
Best Practices
- •Enter the market vacancy: 5% as a floor, 10-15% in user-cycle areas
- •Keep management % even if you self-manage, and treat it as the hiring budget
- •Reserve maintenance at at least 10% of rent — cheap deals fail here
- •Re-run with the letting condition that asks "what if rent drops 10%?"
- •Pair with a 1031 and BRRRR discussion before you sign, never after
Common Misconceptions
Practical Tips
- •Set rent from comps, not aspiration — the deal dies on unrealistic rent twice
- •Enter closing costs, they are real cash out for the cash-on-cash line
- •Vacancy 10% beats 5% if your market has slow turnovers
- •Check DSCR before the cash-on-cash when you plan a refinance
- •Verify the property tax rate from the county, not the listing
- •A 6% cap rate city with 9% cash-on-cash beats a coastal 3% that only appreciated
Common Mistakes
Assumptions
This calculator makes the following assumptions to provide estimates:
Limitations
Be aware of these limitations when using this calculator:
Frequently Asked Questions
Answers to common questions about this calculator.
What is a rental property calculator?
What is Net Operating Income (NOI)?
What is cap rate in rental properties?
What is cash-on-cash return?
What is a good cash-on-cash return?
What is the 1% rule in rental properties?
What is the 50% rule in rental properties?
What is the 2% rule in rental properties?
What is Debt Service Coverage Ratio (DSCR)?
How do I calculate operating expenses for a rental?
What is the Gross Rent Multiplier (GRM)?
How do I calculate cash flow on a rental?
What is a good cap rate for rental property?
How does leverage affect rental property returns?
What is the BRRRR method?
How do I analyze a rental property?
What are the tax benefits of rental properties?
What is depreciation recapture when selling?
How do I estimate rent for a property?
What is the vacancy rate for rental properties?
How does property management affect cash flow?
What is the return on equity (ROE) for rentals?
How do interest rates affect rental property investing?
What is a value-add rental property?
How do I calculate the initial investment for a rental?
What is the difference between gross yield and net yield?
How does appreciation affect rental property returns?
What is a 1031 exchange for rental properties?
How do I find good rental properties?
What is the biggest risk in rental property investing?
How much cash reserve should I have for a rental?
What is the difference between SFH and multi-family rentals?
How is the cap rate used in comparing deals?
What counts as operating expenses versus capital improvements?
Is the mortgage payment part of NOI?
How do I value a cash-flow-rental when buying off-market?
What is negative cash flow and when is it acceptable?
How do taxes and insurance compare by location?
What happens to cash-on-cash return as rents grow?
When should I sell versus keep a rental?
Can this calculator handle a short-term rental?
Related Calculators
Explore more calculators related to this topic.
Related Guides
Deepen your understanding with these educational resources.
Glossary
Technical terms used in mortgage calculations explained in plain language.
- NOI
- Net Operating Income: annual rent after vacancy and operating expenses, before debt.
- Cap rate
- Net Operating Income ÷ property value, measuring the unlevered return.
- Cash-on-cash return
- Annual pre-tax cash flow ÷ your invested cash (down payment + closing).
- DSCR
- Debt Service Coverage Ratio: NOI ÷ annual debt, the lenders safety match.
- Cash flow
- Income left after expenses and the mortgage payment.
- Gross yield
- Annual rent ÷ property value, ignoring expenses.
- BRRRR
- Buy, rehab, rent, refinance, repeat — a full-cycle renovation strategy.
Authoritative References
Trusted sources and standards referenced by this calculator.
Applicable Standards
Was This Calculator Helpful?
Page Information
2026-08-07
2.0.0
Free to use for educational and professional purposes.