2026-08-07 12 min

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

Purchase Price Help
$

Price you are buying the property at

Closing Costs Help
$

Fees, title, appraisal at purchase

Down Payment(%) Help
%

Percent of the price paid in cash

Interest Rate(%) Help
%

Annual fixed rate on the mortgage

Loan Term (years)
Monthly Rent Help
$

Estimated rent the unit brings in

Vacancy Rate(%) Help
%

Expected portion of the year without a tenant

Property Tax Rate(%) Help
%

Annual tax as a percent of the purchase price

Annual Insurance Help
$

Property and liability insurance per year

Management Fee(%) Help
%

Property management fee as a share of rent

Maintenance / Repairs(%) Help
%

Maintenance reserve as a share of rent

HOA Fee($/mo) Help
$/mo

Homeowners association fee if any

Other Expenses($/mo) Help
$/mo

Utilities you cover, landscaping, misc

Results update live as you type
Status:Annual rent $30,000.00Cash flow -$41.96/moCap 5.90%DSCR 0.97

Property Analysis

Gross Annual Rent$30,000.00
Total Expenses$12,300.00
Net Operating Income$17,700.00
Annual Mortgage$18,203.56
Cash Invested$69,000.00
Cap Rate5.90%
Cash-on-Cash-0.73%
DSCR0.97x
Monthly Cash Flow-$41.96

Results

Optimal

Net Operating Income

$17,700.00/yr

Rent income minus operating expenses before debt

Monthly Cash Flow

-$41.96/mo

NOI minus the monthly mortgage payment

Cap Rate

5.90%

Unleveraged return of the property

Cash-on-Cash Return

-0.73%

Return on the cash you actually invested

Debt Service Coverage

0.97x

NOI divided by annual debt payments

Cash Invested

$69,000.00

Down payment plus closing costs

Total Expenses

$12,300.00

Vacancy, taxes, insurance, management, maintenance, HOA, other

Monthly Mortgage

$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

30,000Gross Rent
12,300Expenses
17,700NOI
-504Cash Flow

Annual Expense Make-up

Vacancy12%
Property Tax29%
Insurance10%
Management24%
Maintenance24%

Debt Service Coverage

1x
03

Cash-on-Cash Return

Cash on cash0%

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.

NOI = Gross Rent − (Vacancy + Operating Expenses); Cap = NOI ÷ Price; CF = NOI − Debt; DSCR = NOI ÷ Debt

Alternative Form

Cash-on-Cash = (NOI − Annual Debt) ÷ (Down + Closing)

Variables

SymbolNameUnitDescription
NOINet Operating IncomeUSDAnnual rent − vacancy and operating expenses
Cash FlowAnnual cash flowUSDNOI minus the annual mortgage payment
Cap RateCap rate%NOI ÷ purchase price × 100
CoCCash-on-cash return%Annual cash flow ÷ total cash invested × 100
DSCRDebt service coverageratioNOI ÷ annual mortgage payments
PIMortgage paymentUSD/moAmortized 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.

Step 1

Start with the annual effective rent after vacancy.

Gross Rent = Monthly Rent × 12; Effective Rent = Gross − Vacancy
Monthly:$2,500.00
Vacancy:5%
Intermediate: Gross = $30,000.00 · Vacancy loss = $1,500.00
Result: Effective rent of $28,500.00 after vacancy
Step 2

Cast operating expenses: taxes, insurance, management, maintenance, HOA, other.

Expenses = Σ (operating lines)
Taxes:1.2%
Management:10%
Maintenance:10%
Intermediate: Total operating = $12,300.00
Result: Net Operating Income = $17,700.00
Step 3

NOI feeds cap rate, the return before leverage.

Cap Rate = NOI ÷ Purchase Price
NOI:$17,700.00
Price:$300,000.00
Intermediate: $17,700.00 ÷ $300,000.00
Result: 5.90% cap rate
Step 4

Add the mortgage: monthly payment from the loan amount.

Payment = P × r / (1 − (1+r)^−n)
Rate:6.5%
Term:30 yrs
Intermediate: Loan $240,000.00
Result: Monthly payment of $1,516.96
Step 5

Cash flow is NOI minus the annual mortgage payment.

Cash Flow = NOI − Annual Mortgage
NOI:$17,700.00
Mortgage:$18,203.56
Intermediate: $17,700.00 − $18,203.56
Result: Shortfall of -$41.96/mo
Step 6

Final check on the cash you put in and debt coverage.

Cash-on-Cash = Cash Flow ÷ Invested; DSCR = NOI ÷ Debt
Invested:$69,000.00
DSCR:0.97
Intermediate: -0.73% return on cash
Result: Deal is below the lender bar
Final Answer
$17,700.00

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

Price:$300,000
Down:20%
Rent:$2,500/mo
Taxes:1.2%
Mgmt:10%
Maint:10%

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

▸Underwriting a first purchase with 20% down
▸Comparing a positive cash flow suburb deal versus a 3% cap city asset
▸Testing a rent bump or refinance to the monthly math
▸Evaluating BRRRR sequencing after the rehab and refi
▸Stress-testing a deal for DSCR at 1.05 with higher vacancy

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

Myth: NOI is the same as cash flow.
Truth: NOI is pre-debt. Cash flow strips the mortgage payment off NOI; a property can have a fine NOI and still lose money monthly.
Myth: A higher cap rate always means a better deal.
Truth: Cap rate is a one-year snapshot, not a quality score. Higher cap rates usually mean higher vacancy, capital, obsolescence, or deferred maintenance. It must be read together with cash flow and the market.
Myth: Cash-on-cash ignores the appreciation.
Truth: It only counts current cash. A property bought at 11% and $0 cash flow can still win on equity when refinanced — the calculator cannot know that future.

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

Forgetting vacancy in the expense line
Put at least 5% vacancy rate into the field — every property turns sometime.
Skipping management in a self-managed plan
Enter 8-10% anyway. If rent keeps you healthy with the fee, the deal works either way.
Estimating taxes from last years bill on a new purchase
The new purchase triggers a reassessment; use the expected future rate, not the seller bill.
Mixed up cap rate and cash-on-cash as the same thing
Cap ignores the loan; cash-on-cash counts the invested cash only. Both are listed separately for when needed.
Ignoring the closing cost field
Even $7,000 on a $300,000 deal cuts cash-on-cash meaningfully. It is a cash you need at the table.
Assuming fixed vacancy forever
Stress with 10% vacancy and a 1-year gap at turnover; the ratio differences should still breathe.

Assumptions

This calculator makes the following assumptions to provide estimates:

Annual operating frame: All amounts projected over twelve full months of ownership.
Cash-in-hand at close: Cash invested includes the down payment and closing fees, no renovation forecast.
Defined operating mix: Expenses stay inside the pre-listed categories; deferred big-ticket repairs are not forecast.
Fixed-rate mortgage: The loan uses the amortization formula at a constant rate for the full term.
No cash-flow to taxes: Income tax effects, depreciation, and deductions are not in the metrics.

Limitations

Be aware of these limitations when using this calculator:

Scalarity: Metrics are snapshots with fixed vacancy and expense inputs, not forecasts.
Long-term repairs: One-time big items (roof, HVAC) are not forecast or amortized line by line.
Market rate drift: Rents and rates are held flat over the year, ignoring renewal raises.
Tax-dependent: Cash flow is pre-tax; depreciation and 103 planning are out of scope here.
Fraction-year accuracy: Purchase timing and mid-year linear exposure are not modeled.

Frequently Asked Questions

Answers to common questions about this calculator.

What is a rental property calculator?
A rental property calculator helps investors analyze the financial performance of a potential rental property. It calculates key metrics including Net Operating Income (NOI), cash flow, cap rate, cash-on-cash return, and Debt Service Coverage Ratio (DSCR) based on purchase price, rental income, and expenses.
What is Net Operating Income (NOI)?
NOI is the annual income generated by a property after operating expenses but before mortgage payments. Formula: NOI = Gross Rental Income - Vacancy Loss - Operating Expenses (property management, taxes, insurance, repairs, HOA). NOI is used to calculate cap rate and DSCR.
What is cap rate in rental properties?
Cap Rate = NOI / Property Value. It measures the unleveraged return on a property. A 6% cap rate means the property generates 6% of its value in net income annually. Cap rates vary by market: 4-6% in expensive coastal markets, 8-12% in secondary markets. Higher cap rates mean higher returns but often higher risk.
What is cash-on-cash return?
Cash-on-Cash Return = Annual Pre-Tax Cash Flow / Total Cash Invested (down payment + closing costs). It measures the return on the actual cash you invested, accounting for leverage. A 10% cash-on-cash return means you earn 10% of your invested cash annually. This is a key metric for leveraged investors.
What is a good cash-on-cash return?
Most investors target 8-12% cash-on-cash return. Returns above 12% are considered excellent. Below 5% may not justify the risk and effort. The target varies by market, property type, and investor goals. Value-add properties may have lower initial returns but higher upside potential.
What is the 1% rule in rental properties?
The 1% rule states that monthly rent should be at least 1% of the purchase price. A $200,000 property should rent for at least $2,000 a month. This is a quick screening tool, not a definitive analysis. In many markets, achieving 1% is difficult; 0.5-0.8% is more common in expensive areas.
What is the 50% rule in rental properties?
The 50% rule states that operating expenses (excluding mortgage) will be approximately 50% of gross rental income. If gross rent is $2,000 per month, expect $1,000 per month in expenses. This is a rough estimate; actual expenses vary by property age, location, and management.
What is the 2% rule in rental properties?
The 2% rule is a more aggressive screening tool: monthly rent should be at least 2% of purchase price. This is rarely achievable in most markets but may be possible in very low-cost areas or multi-unit properties. Most investors use the 1% rule as a more realistic benchmark.
What is Debt Service Coverage Ratio (DSCR)?
DSCR = NOI / Annual Debt Payments. It measures a propertys ability to cover its mortgage payments. Lenders typically require DSCR of 1.25+ for investment properties. A DSCR of 1.0 means NOI exactly covers the mortgage. Below 1.0 means the property cannot cover its debt.
How do I calculate operating expenses for a rental?
Operating expenses include: property management (8-12% of rent), property taxes (1-2% of value), insurance (0.5-1% of value), repairs and maintenance (1-2% of value), HOA fees, utilities (if paid by owner), and vacancy reserve (5-10% of rent). Total typically runs 35-50% of gross rent.
What is the Gross Rent Multiplier (GRM)?
GRM = Property Price / Gross Annual Rent. A GRM of 10 means the property costs 10 times annual rent. Lower GRM indicates better value. GRM is a quick comparison tool but ignores expenses. GRM of 8-12 is common for single-family rentals; 5-8 for multi-family.
How do I calculate cash flow on a rental?
Cash Flow = Gross Rent - Vacancy Loss - Operating Expenses - Mortgage Payment. Positive cash flow means the property generates income after all costs. Negative cash flow means you are putting money in each month. Most investors seek positive cash flow from day one.
What is a good cap rate for rental property?
Cap rates vary by market and property type. National averages: single-family rentals 4-8%, multi-family 5-9%, commercial 6-10%. In major coastal cities, cap rates may be 3-5%. In secondary and tertiary markets, 7-12%. Higher cap rates generally indicate higher risk or lower growth potential.
How does leverage affect rental property returns?
Leverage (using a mortgage) amplifies returns. With 20% down on a $300,000 property that appreciates 4% ($12,000), the equity return is 20% ($12,000 divided by $60,000 invested). However, leverage also amplifies losses if the property decreases in value or produces negative cash flow.
What is the BRRRR method?
BRRRR stands for Buy, Rehab, Rent, Refinance, Repeat. Buy a distressed property below market, renovate it, rent it out, refinance based on the new appraised value to pull cash out, then repeat with the next property. This strategy builds a portfolio with recycled capital.
How do I analyze a rental property?
Start with the purchase price and estimated rent. Calculate gross income, subtract vacancy (5-10%) and operating expenses. Determine NOI and cap rate. Subtract the mortgage payment to get cash flow. Calculate cash-on-cash return. Compare the result to your investment goals and alternative investments.
What are the tax benefits of rental properties?
Rental property owners can deduct mortgage interest, property taxes, operating expenses, insurance, repairs, depreciation, and travel costs. Depreciation is particularly valuable: owners deduct about 3.6% of the structure value annually for 27.5 years as a paper loss that offsets income.
What is depreciation recapture when selling?
When you sell a rental property, the IRS taxes the depreciation you claimed at a rate up to 25%, versus 0-20% for long-term capital gains. Proper tax planning, including 1031 exchanges, can defer depreciation recapture.
How do I estimate rent for a property?
Research comparable rentals (comps) on Zillow, Rentometer, and Realtor.com. Consider location, size, bedrooms and bathrooms, amenities, condition, and season. A local property manager can provide a market rent analysis. Be conservative in estimates to ensure positive cash flow.
What is the vacancy rate for rental properties?
The national average vacancy rate is 5-8%. In strong markets, 3-5%. In weaker markets, 10% or more. Always budget for vacancy (at least 5-10% of gross rent). Turnover also costs cleaning, painting, and advertising between tenants.
How does property management affect cash flow?
Property management companies charge 8-12% of monthly rent, plus leasing fees (50-100% of the first months rent). Self-management saves this cost but requires time and expertise. Factor management into your analysis even if you plan to self-manage at first.
What is the return on equity (ROE) for rentals?
ROE = Annual Cash Flow / Total Equity. As equity builds through appreciation and principal paydown, ROE typically falls. Many investors sell or refinance when ROE drops below a target (such as 5-8%) to redeploy equity into higher-return properties.
How do interest rates affect rental property investing?
Higher interest rates increase mortgage payments, reducing cash flow and making deals harder to pencil. In a high-rate environment, investors may need larger down payments, higher rents, or to accept lower returns. Rising rates can also slow appreciation.
What is a value-add rental property?
A value-add property has potential to increase income through renovations, better management, or repositioning: updated kitchens and baths, added bedrooms, improved landscaping, reduced expenses. Value-add investing typically offers higher returns than buying stabilized properties.
How do I calculate the initial investment for a rental?
Initial investment = Down Payment + Closing Costs + Repair Costs + Holding Costs (before renting). For a $300,000 property with 20% down: $60,000 down, $9,000 closing, $5,000 initial repairs, and $2,000 holding costs total about $76,000. This is used for cash-on-cash return.
What is the difference between gross yield and net yield?
Gross Yield = Annual Rent / Property Price. Net Yield (Cap Rate) = NOI / Property Price. Gross yield ignores expenses; net yield accounts for all operating costs. A property with 8% gross yield might have 5% net yield after expenses.
How does appreciation affect rental property returns?
Total return = Cash Flow + Appreciation + Principal Paydown. In growth markets, appreciation is the primary driver. In cash-flow markets, current income matters more. A balanced approach considers both. Historical total returns for rental real estate average 8-12% annually.
What is a 1031 exchange for rental properties?
A 1031 exchange allows you to sell a rental property and reinvest proceeds into a like-kind property without paying capital gains taxes immediately. You must identify a replacement property within 45 days and close within 180 days. This is a powerful wealth-building tool for investors.
How do I find good rental properties?
Look for markets with population growth, job growth, limited housing supply, reasonable prices, and landlord-friendly laws. Use online tools such as Zillow, Redfin, and BiggerPockets. Network with local agents and investors. Analyze dozens of properties before making an offer.
What is the biggest risk in rental property investing?
The biggest risks include vacancy (no income), problematic tenants (damage, eviction), major repairs (roof, HVAC, foundation), declining property values, rising interest rates, and changing regulations (rent control, eviction moratoriums). Proper due diligence and reserve funds mitigate these risks.
How much cash reserve should I have for a rental?
Most experts recommend 3-6 months of operating expenses (about $5,000-$15,000 per property) in cash reserves for vacancies, repairs, and emergencies. Mortgage lenders may require proof of reserves. Adequate reserves weather unexpected expenses without financial distress.
What is the difference between SFH and multi-family rentals?
Single-family homes cost less, finance easier, and sell to a broader buyer pool, but produce lower cash flow per unit. Multi-family (duplex, triplex, quad) delivers higher cash flow and economy of scale, but needs more capital and more complex financing.
How is the cap rate used in comparing deals?
Cap rate normalizes NOI to property price so you can compare assets of different sizes: Cap Rate = NOI / Price. A $100,000 property with $8,000 NOI and a $500,000 property with $40,000 NOI both show 8%. The metric strips out leverage and price level.
What counts as operating expenses versus capital improvements?
Operating expenses repeat yearly: management, taxes, insurance, repairs, vacancy, HOA. Capital improvements (new roof, appliances, major renovation) extend the propertys useful life and should be budgeted separately, usually 5-10% of value annually.
Is the mortgage payment part of NOI?
No. NOI is computed before financing, using only income and operating expenses. Mortgage payments (principal and interest) are deducted after NOI to reach cash flow, and are used separately in DSCR with NOI on top of annual debt service.
How do I value a cash-flow-rental when buying off-market?
Value from the income it produces: Start from the NOI the deal supports, divide by your target cap rate to get the offer price. Then run this calculator with the resulting numbers. Never pay the asking price without confirming the rent and expense assumptions.
What is negative cash flow and when is it acceptable?
Negative cash flow means the mortgage and expenses exceed the rental income. It can be acceptable in high-appreciation markets where equity growth outpaces the loss. Keep it small and temporary; a sustained negative cash flow quietly erodes your return.
How do taxes and insurance compare by location?
Property tax rates vary from a fraction of a percent to over 2% of value, and insurance for coastal or storm-prone areas can easily double. Always fix these numbers to the local county and insurer before locking a deal rather than using national averages.
What happens to cash-on-cash return as rents grow?
Cash-on-cash return rises because cash flow grows while your invested cash stays flat. A property bought at 10% cash-on-cash can reach 15% within five years with disciplined rent bumps, assuming expenses rise slower than rent.
When should I sell versus keep a rental?
Compare triplet: the cash you could pull out, the yield it would earn elsewhere, and the tax cost of selling (including depreciation recapture and 1031 options). Many investors use the 1% rule as a screening tool in deciding: a property under that ratio is easier to justify selling.
Can this calculator handle a short-term rental?
Short-term rentals change the expense and occupancy structure: higher revenue per night but also higher management, cleaning, utility, and turnover costs. Enter expected average monthly occupancy-rid income as Monthly Rent and an aggressive vacancy rate to model seasons.

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

The Appraisal Foundation — USPAP Standards for Real PropertyIRS Publication 527 (Residential Rental Property)ABA/IRS reporting on rental use periods

Was This Calculator Helpful?

Page Information

Last Updated:

2026-08-07

Version:

2.0.0

License:

Free to use for educational and professional purposes.