Investment Property Mortgage Calculator — Calculate Rental Property Financing

Investment Property Mortgage Calculator

Calculate mortgage payments, cash flow, and ROI for rental properties. Analyze investment property financing with our comprehensive calculator.

Step 1: Property Details

$300,000
20%

Loan Amount Calculation

Loan Amount = Property Price × (100% – Down Payment %)
Example: $300,000 × 80% = $240,000 loan

Step 2: Financial Details

4.5%
$1,800
$400

Cash Flow Calculation

Monthly Cash Flow = Rental Income – Mortgage Payment – Expenses
Positive cash flow indicates profitable investment

Investment Property Analysis

Payment Summary
Scenario Comparison
Mortgage Formula

Monthly Mortgage Payment

$1,216
30-year loan at 4.5% interest
Positive Cash Flow: $184/month
Loan Amount
$240,000
Down Payment
$60,000
Total Interest Paid
$197,760
Monthly Cash Flow
+$184

Investment Scenarios Comparison

Scenario Down Payment Monthly Payment Cash Flow

Mortgage Payment Formula

M = P × [r(1+r)^n] / [(1+r)^n – 1]

Where:
• M = Monthly mortgage payment
• P = Principal loan amount
• r = Monthly interest rate (annual rate ÷ 12)
• n = Total number of payments (loan term × 12)

Cash Flow Formula:
• Cash Flow = Rental Income – Mortgage Payment – Expenses
• ROI = (Annual Cash Flow ÷ Total Investment) × 100%

Example Calculation

Example: $300,000 Rental Property

Property Price: $300,000
Down Payment: 20% ($60,000)
Loan Amount: $240,000
Interest Rate: 4.5% annually
Loan Term: 30 years (360 payments)

Calculation:
Monthly Rate = 4.5% ÷ 12 = 0.375%
M = $240,000 × [0.00375(1+0.00375)^360] / [(1+0.00375)^360 – 1]
Monthly Payment = $1,216.04

With $1,800 rent and $400 expenses:
Cash Flow = $1,800 – $1,216 – $400 = $184/month

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