Crunchly — Real Estate Investment Calculator

Monthly Cash Flow

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Annual Cash Flow

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Cash-on-Cash Return

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Cap Rate

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Cost Per Unit

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Cash Flow / Unit

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Purchase & Financing

Purchase Price ($)

Down Payment (%)

Interest Rate (%)

Loan Term (yrs)

Closing Costs ($)

Number of Units

Income

Monthly Rent ($)

Vacancy Rate (%)

Monthly Expenses

Property Tax ($/yr)

Insurance ($/yr)

Repairs & Maint (% of rent/mo)

CapEx Reserve (% of rent/mo)

Mgmt Fee (%)

Oil/Gas ($/yr)

Electricity ($/yr)

Water/Sewer ($/yr)

Trash ($/yr)

Yard Work ($/yr)

Other ($/yr)

Monthly Breakdown

Gross Rent—

Vacancy Loss—

Effective Rent—

Mortgage (P&I)—

Tax + Insurance—

Repairs + CapEx—

Mgmt + Other—

Net Cash Flow—

Expense Breakdown

% Split

Monthly $

Additional Metrics

Gross Rent Multiplier—

Break-even Occupancy—

Expense Ratio—

Down Payment $—

Loan Amount—

Annual Cash Flow Projection (30 yr, 3% rent growth)

Live Investor Rules — Calculated From Your Numbers

The 1% Rule

Monthly Rent ≥ 1% of Purchase Price

1% required rent—

Your monthly rent—

Ratio—

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The 2% Rule

Monthly Rent ≥ 2% of Purchase Price

2% required rent—

Your monthly rent—

Ratio—

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The 50% Rule

Operating Expenses ≈ 50% of Gross Rent

50% of your rent—

Your op. expenses—

Expense ratio—

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$200/Door Rule

Net Cash Flow ≥ $200/month

Your net cash flow—

vs $200 target—

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Cash-on-Cash Target (≥8%)

Annual Cash Flow ÷ Cash Invested × 100

Your CoC return—

vs 8% target—

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GRM Benchmark (<12×)

Price ÷ Annual Gross Rent

Your GRM—

Rent needed for 12×—

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CapEx Reserve (≥5% of rent)

Reserve ≥ 5% of Monthly Rent

5% of rent—

Your CapEx/mo—

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Vacancy Buffer (≥5%)

Vacancy rate ≥ 5% of gross rent

Your vacancy rate—

Annual vacancy loss—

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Net Profit

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ROI

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Annualized ROI

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70% Rule Max Offer

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Acquisition & Rehab

Purchase Price ($)

Closing Costs – Buy ($)

Rehab Budget ($)

CapEx Buffer (% of rehab)

Holding Costs ($/mo)

Hold Period (months)

Sale

After-Repair Value ($)

Agent Commission (%)

Closing Costs – Sell ($)

Deal Breakdown

Purchase Price—

Rehab / Repairs—

CapEx Buffer—

Holding Costs—

Buy + Sell Closing—

Commission—

Total All-In Cost—

ARV (Sale Price)—

Net Profit—

Cost Waterfall

Live Investor Rules — Calculated From Your Numbers

The 70% Rule

(ARV × 0.70) − Rehab = Max Offer

70% rule max offer—

Your purchase price—

Margin vs limit—

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The 65% Rule (Hard Money)

(ARV × 0.65) − Rehab = Max Offer

65% rule max offer—

Your purchase price—

Margin vs limit—

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Minimum Profit ($20k)

Net Profit ≥ $20,000

Your net profit—

vs $20k minimum—

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Annualized ROI Target (≥40%)

ROI × (12 ÷ Hold Months)

Your annualized ROI—

vs 40% target—

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Holding Cost Exposure

Holding costs as % of total invested

Total holding costs—

% of all-in cost—

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Profit Margin Check (≥15%)

Net Profit ÷ ARV ≥ 15%

Your profit margin—

vs 15% target—

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CapEx Contingency (≥10%)

CapEx buffer ≥ 10% of rehab

Your buffer %—

Buffer dollar amount—

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$/Month Earned (≥$5k)

Net Profit ÷ Hold Months

Earned per month—

vs $5k/mo target—

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Monthly P&I

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Total Monthly (PITI)

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Total Interest Paid

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Required Income / mo

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Loan Details

Home Price ($)

Down Payment (%)

Interest Rate (%)

Loan Term (yrs)

Property Tax ($/yr)

Insurance ($/yr)

PMI Rate (% if <20%)

Closing Costs ($)

Payment Breakdown

Loan Amount—

Down Payment—

Closing Costs—

Total Cash Needed—

LTV Ratio—

Principal & Interest—

Property Tax—

Insurance—

PMI—

Total Monthly (PITI)—

Principal vs Interest Over Time

Principal

Interest

Amortization Schedule (first 5 yrs)

Year	Principal	Interest	Balance

Live Investor Rules — Calculated From Your Numbers

28% Housing Ratio Rule

PITI ≤ 28% of Gross Monthly Income

Your PITI payment—

Income needed (28%)—

Your housing ratio—

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20% Down / No PMI Rule

Down Payment ≥ 20% → No PMI

Your down payment—

PMI monthly cost—

Annual PMI drag—

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LTV Threshold

LTV ≤ 80% best terms, ≤ 75% best rates

Your LTV ratio—

Your equity—

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Total Cost of Borrowing

Total paid ÷ Loan Amount (target < 2×)

Total interest paid—

Cost multiplier—

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DSCR Check (≥1.25)

NOI ÷ Annual P&I ≥ 1.25

Annual P&I debt—

DSCR ratio—

Uses Cash Flow tab rent data

Rate +1% Stress Test

+1% rate ≈ +10–12% higher payment

Payment at current rate—

Payment at rate +1%—

Monthly increase—

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15 vs 30 Year Comparison

15-yr saves ~50% interest vs 30-yr

30-yr P&I—

15-yr P&I—

Interest saved (15-yr)—

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Extra $100/mo Impact

Extra payments save years & thousands

Approx. interest saved—

Years cut from loan—

Making extra payments saves significantly

Cap Rate

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Cash-on-Cash Return

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Net Operating Income

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Gross Yield

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Cost Per Unit

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NOI / Unit

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Income

Monthly Rent ($)

Other Income ($/mo)

Vacancy Rate (%)

Annual Operating Expenses

Property Tax ($)

Insurance ($)

Repairs & Maint (% of rent/mo)

CapEx Reserve (% of rent/mo)

Property Mgmt (%)

Oil/Gas ($/yr)

Electricity ($/yr)

Water/Sewer ($/yr)

Trash ($/yr)

Yard Work ($/yr)

Other ($)

Investment

Property Value ($)

Total Cash Invested ($)

Number of Units

Income & Expense Summary

Gross Annual Income—

Vacancy Loss—

Effective Gross Income—

Tax + Insurance—

Repairs + CapEx—

Mgmt + Other—

Net Operating Income—

Additional Metrics

Expense Ratio—

NOI Margin—

Break-even Vacancy—

Gross Rent Multiplier—

Cap Rate Context

0%4%6%8%10%12%+

Below 4% — Low-risk / prime 4–6% — Stable market 6–8% — Above average yield 8–10% — High yield 10%+ — Verify assumptions

Live Investor Rules — Calculated From Your Numbers

Cap Rate Benchmark (5–8%)

NOI ÷ Property Value × 100

Your cap rate—

Target range5–8% sweet spot

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Cash-on-Cash Target (≥8%)

NOI ÷ Cash Invested × 100

Your CoC return—

vs 8% minimum—

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Gross Yield Screen (≥8%)

Annual Gross Rent ÷ Property Value

Your gross yield—

vs 8% screen—

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50% Expense Ratio Rule

Operating Expenses ÷ EGI ≤ 50%

Your expense ratio—

vs 50% benchmark—

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Value-Add NOI Rule

$1 annual NOI = $1 ÷ Cap Rate in value

+$100/mo rent adds—

+$500/mo rent adds—

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DSCR Check (≥1.25)

NOI ÷ Annual Debt Service

Your DSCR—

vs 1.25 lender min—

Enter mortgage in Mortgage tab for DSCR

Break-even Vacancy Safety

Break-even > 2× actual vacancy rate

Your break-even vacancy—

Your actual vacancy—

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GRM Benchmark (<12×)

Price ÷ Annual Gross Rent

Your GRM—

Rent needed for 12×—

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Cash-on-Cash Return

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Annual Cash Flow

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Total Cash Invested

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vs 8% Target

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Cash Flow / Unit

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Inputs

Down Payment ($)

Closing Costs ($)

Rehab / Improvements ($)

Other Cash Invested ($)

Monthly Gross Rent ($)

Vacancy Rate (%)

Monthly Mortgage P&I ($)

Monthly Operating Exp ($)

Number of Units

Breakdown

Gross Annual Rent—

Vacancy Loss—

Annual Mortgage—

Annual Operating Exp—

Net Annual Cash Flow—

Total Cash Invested—

Cash-on-Cash Return—

Benchmarks: Below 4% = weak. 4–6% = acceptable. 6–8% = solid. 8–12% = strong. 12%+ = excellent (verify assumptions).

Total ROI

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Annualized ROI

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Total Profit

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Equity Built

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Property & Investment Details

Purchase Price ($)

Down Payment ($)

Closing + Rehab ($)

Annual Appreciation (%)

Hold Period (years)

Annual Net Cash Flow ($)

Mortgage Rate (%)

Loan Term (yrs)

Return Breakdown

Future Property Value—

Appreciation Gain—

Cumulative Cash Flow—

Principal Paid Down—

Total Gain—

Total Invested—

Total ROI—

ROI Trajectory

Total Gain (hover for breakdown)

Gross Yield

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Net Yield

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Annual Gross Rent

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Net Annual Income

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Cost Per Unit

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Net Income / Unit

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Property & Income

Property Value ($)

Monthly Rent ($)

Vacancy Rate (%)

Number of Units

Annual Operating Expenses

Annual Tax ($)

Annual Insurance ($)

Repairs & CapEx (% of rent/mo)

Property Mgmt (%)

Oil/Gas ($/yr)

Electricity ($/yr)

Water/Sewer ($/yr)

Trash ($/yr)

Yard Work ($/yr)

Other Annual ($)

Mortgage

Down Payment (%)

Interest Rate (%)

Loan Term (yrs)

Yield Breakdown

Annual Gross Rent—

Vacancy Loss—

Effective Gross Income—

Total Operating Expenses—

Net Operating Income—

Gross Yield—

Net Yield—

Monthly P&I—

Monthly Cash Flow (after debt)—

Benchmarks: Gross yield ≥8% recommended before further analysis. Net yield ≥5% is the typical investor minimum. The trajectory chart shows cash flow after debt service year by year.

Cash Flow Trajectory (Loan Term)

Annual Cash Flow after debt service (hover for detail)

Cash Recovered

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Cash Left In Deal

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Equity After Refi

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Monthly Cash Flow

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Cost Per Unit

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Cash Flow / Unit

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Buy & Rehab Phase

Purchase Price ($)

Rehab Cost ($)

Closing Costs ($)

Carrying Costs ($)

Refinance Phase

After-Repair Value ($)

Refi LTV (%)

Refi Rate (%)

Loan Term (yrs)

Rental Income

Monthly Rent ($)

Monthly Expenses ($)

Number of Units

BRRRR Results

Total All-In Cost—

Refi Loan Amount—

Cash Recovered—

Cash Left In Deal—

Equity (ARV − Loan)—

New Monthly P&I—

Monthly Cash Flow—

DSCR Ratio

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Annual NOI

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Annual Debt Service

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Surplus / Shortfall

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Income & Expenses

Monthly Rent ($)

Vacancy Rate (%)

Annual Tax ($)

Annual Insurance ($)

Repairs & CapEx (% of rent/mo)

Property Mgmt (%)

Oil/Gas ($/yr)

Electricity ($/yr)

Water/Sewer ($/yr)

Trash ($/yr)

Yard Work ($/yr)

Loan Amount ($)

Interest Rate (%)

Loan Term (yrs)

DSCR Analysis

Gross Annual Income—

Operating Expenses—

Net Operating Income—

Monthly P&I Payment—

Annual Debt Service—

DSCR—

Lender thresholds: Below 1.0 = NOI doesn't cover mortgage. 1.0–1.20 = risky. 1.20–1.25 = lender minimum. 1.25–1.40 = healthy. 1.40+ = strong — ideal for DSCR loans.

Current Cash Flow

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Break-even Vacancy

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At 10% Vacancy

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At 20% Vacancy

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Base Property Inputs

Monthly Gross Rent ($)

Current Vacancy (%)

Monthly Mortgage P&I ($)

Monthly Operating Exp ($)

Sensitivity Table — Cash Flow vs Vacancy %

Vacancy %	Monthly CF	Annual CF	Status

Deal Score

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Monthly Cash Flow

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Cap Rate

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CoC Return

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Cost Per Unit

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Cash Flow / Unit

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Deal Inputs

Purchase Price ($)

Down Payment (%)

Interest Rate (%)

Loan Term (yrs)

Monthly Rent ($)

Annual Tax ($)

Annual Insurance ($)

Repairs & Maint (% of rent/mo)

CapEx Reserve (% of rent/mo)

Mgmt Fee (%)

Vacancy Rate (%)

Closing Costs ($)

Number of Units

Scorecard

Flip Net Profit

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Rent 5-yr Gain

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Breakeven (months)

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Recommended

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Shared Property Details

Current Value / ARV ($)

All-In Cost ($)

If You Flip (Sell Now)

Agent Commission (%)

Selling Costs ($)

If You Rent (Hold 5 Years)

Monthly Rent ($)

Monthly Expenses ($)

Monthly Mortgage P&I ($)

Annual Appreciation (%)

Comparison

Flip Net Profit—

5-yr Cumulative Cash Flow—

5-yr Appreciation Gain—

5-yr Total Rent Gain—

Renting beats flip by—

Latest

Market Snapshot

30-Yr Fixed—

15-Yr Fixed—

Fed Funds Rate4.25–4.50%

10-Yr Treasury—

Housing Starts—

Existing Home Sales—

Rate data via FRED · St. Louis Fed.

Key Sources

HousingWire Inman Mortgage News Daily GlobeSt BiggerPockets Multi-Housing News Commercial Observer National Mortgage News NAREIT Calculated Risk

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