.rc-row {
display: flex;
flex-wrap: wrap;
margin: 0 -10px;
}
.rc-col {
flex: 1;
min-width: 300px;
padding: 0 10px;
margin-bottom: 20px;
}
.rc-input-group {
margin-bottom: 15px;
}
.rc-input-group label {
display: block;
margin-bottom: 5px;
font-weight: 600;
color: #333;
font-size: 0.95rem;
}
.rc-input-group input, .rc-input-group select {
width: 100%;
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 1rem;
box-sizing: border-box;
}
.rc-input-group input:focus {
border-color: #2c7a7b;
outline: none;
box-shadow: 0 0 5px rgba(44, 122, 123, 0.2);
}
.rc-btn {
background-color: #2c7a7b;
color: white;
padding: 15px 30px;
border: none;
border-radius: 4px;
cursor: pointer;
font-size: 1.1rem;
font-weight: bold;
width: 100%;
transition: background-color 0.3s;
}
.rc-btn:hover {
background-color: #235c5d;
}
.rc-results {
background-color: #f7fafc;
padding: 20px;
border-radius: 8px;
border: 1px solid #e2e8f0;
margin-top: 20px;
}
.rc-result-row {
display: flex;
justify-content: space-between;
align-items: center;
padding: 10px 0;
border-bottom: 1px solid #e2e8f0;
}
.rc-result-row:last-child {
border-bottom: none;
}
.rc-result-label {
color: #4a5568;
font-weight: 500;
}
.rc-result-value {
font-weight: 700;
font-size: 1.1rem;
color: #2d3748;
}
.rc-highlight {
color: #2c7a7b;
font-size: 1.3rem;
}
.rc-negative {
color: #e53e3e;
}
.rc-article {
margin-top: 40px;
line-height: 1.7;
color: #2d3748;
}
.rc-article h2 {
color: #2c7a7b;
margin-top: 30px;
border-bottom: 2px solid #e2e8f0;
padding-bottom: 10px;
}
.rc-article h3 {
color: #2d3748;
margin-top: 20px;
}
.rc-article ul {
padding-left: 20px;
}
.rc-article li {
margin-bottom: 10px;
}
.rc-tooltip {
font-size: 0.8rem;
color: #718096;
margin-top: 2px;
}
function calculateRental() {
// Get Input Values
var price = parseFloat(document.getElementById('rcPurchasePrice').value) || 0;
var downPercent = parseFloat(document.getElementById('rcDownPayment').value) || 0;
var interestRate = parseFloat(document.getElementById('rcInterestRate').value) || 0;
var termYears = parseFloat(document.getElementById('rcLoanTerm').value) || 30;
var closingCosts = parseFloat(document.getElementById('rcClosingCosts').value) || 0;
var rent = parseFloat(document.getElementById('rcMonthlyRent').value) || 0;
var vacancyPercent = parseFloat(document.getElementById('rcVacancyRate').value) || 0;
var taxYearly = parseFloat(document.getElementById('rcAnnualTaxes').value) || 0;
var insuranceYearly = parseFloat(document.getElementById('rcAnnualInsurance').value) || 0;
var hoa = parseFloat(document.getElementById('rcMonthlyHOA').value) || 0;
var maintenance = parseFloat(document.getElementById('rcMaintenance').value) || 0;
var mgmtPercent = parseFloat(document.getElementById('rcMgmtFee').value) || 0;
// Calculations
var downPaymentAmount = price * (downPercent / 100);
var loanAmount = price – downPaymentAmount;
// Mortgage Payment Formula: M = P [ i(1 + i)^n ] / [ (1 + i)^n – 1 ]
var monthlyRate = (interestRate / 100) / 12;
var numberOfPayments = termYears * 12;
var mortgagePayment = 0;
if (interestRate > 0) {
mortgagePayment = loanAmount * (monthlyRate * Math.pow(1 + monthlyRate, numberOfPayments)) / (Math.pow(1 + monthlyRate, numberOfPayments) – 1);
} else {
mortgagePayment = loanAmount / numberOfPayments;
}
// Operating Expenses
var vacancyLoss = rent * (vacancyPercent / 100);
var mgmtFee = rent * (mgmtPercent / 100);
var monthlyTax = taxYearly / 12;
var monthlyInsurance = insuranceYearly / 12;
var operatingExpenses = monthlyTax + monthlyInsurance + hoa + maintenance + mgmtFee + vacancyLoss;
var totalExpenses = operatingExpenses + mortgagePayment;
// Income Metrics
var effectiveGrossIncome = rent – vacancyLoss; // Some prefer subtracting vacancy here, others as expense. We subtract from rent flow.
// Adjusting logic: Cash Flow = Rent – Vacancy – Operating Expenses – Mortgage
// NOI (Net Operating Income) = Income – Operating Expenses (Excluding Mortgage)
// Note: NOI usually subtracts vacancy from potential gross income.
var noiMonthly = (rent – vacancyLoss) – (monthlyTax + monthlyInsurance + hoa + maintenance + mgmtFee);
var noiAnnual = noiMonthly * 12;
// Cash Flow
var monthlyCashFlow = noiMonthly – mortgagePayment;
var annualCashFlow = monthlyCashFlow * 12;
// Investment Metrics
var totalCashInvested = downPaymentAmount + closingCosts;
var cocReturn = 0;
if (totalCashInvested > 0) {
cocReturn = (annualCashFlow / totalCashInvested) * 100;
}
var capRate = 0;
if (price > 0) {
capRate = (noiAnnual / price) * 100;
}
// Display Results
document.getElementById('rcResultsArea').style.display = 'block';
document.getElementById('resMortgage').innerText = formatCurrency(mortgagePayment);
document.getElementById('resTotalExpenses').innerText = formatCurrency(totalExpenses);
document.getElementById('resNOI').innerText = formatCurrency(noiMonthly);
var cashFlowEl = document.getElementById('resCashFlow');
cashFlowEl.innerText = formatCurrency(monthlyCashFlow);
if(monthlyCashFlow < 0) {
cashFlowEl.classList.add('rc-negative');
} else {
cashFlowEl.classList.remove('rc-negative');
}
var cocEl = document.getElementById('resCoC');
cocEl.innerText = cocReturn.toFixed(2) + '%';
if(cocReturn < 0) {
cocEl.classList.add('rc-negative');
} else {
cocEl.classList.remove('rc-negative');
}
document.getElementById('resCapRate').innerText = capRate.toFixed(2) + '%';
}
function formatCurrency(num) {
return '$' + num.toLocaleString('en-US', {minimumFractionDigits: 2, maximumFractionDigits: 2});
}
Rental Property Cash Flow Calculator
Purchase Info
30 Years
15 Years
10 Years
Approx. 2-5% of purchase price
Income & Expenses
Usually 8-10% if hiring a manager
Financial Analysis
Monthly Principal & Interest:
$0.00
Total Monthly Expenses (inc. Mortgage):
$0.00
Net Operating Income (NOI) Monthly:
$0.00
Monthly Cash Flow:
$0.00
Cash on Cash Return
0.00%
Cap Rate
0.00%
How to Analyze Rental Property Investments
Investing in real estate is one of the most reliable ways to build wealth, but it requires precise calculation. This Rental Property Cash Flow Calculator helps investors determine the viability of a potential purchase by analyzing income, expenses, and return on investment (ROI).
Understanding the Key Metrics
When analyzing a rental deal, there are three primary numbers you must focus on:
- Cash Flow: This is the profit you take home each month after all bills are paid (Mortgage, Taxes, Insurance, Repairs). Positive cash flow is essential for long-term sustainability.
- Cash on Cash Return (CoC): This measures the annual return on the actual cash you invested (Down Payment + Closing Costs). It is often considered the most important metric for investors using leverage. A CoC return of 8-12% is typically considered a solid investment in many markets.
- Cap Rate (Capitalization Rate): This represents the rate of return on the property based on the income it generates, independent of financing. It is calculated by dividing the Net Operating Income (NOI) by the purchase price. It helps compare properties directly, regardless of how they are purchased.
Common Rental Expenses Checklist
Many new investors underestimate expenses, leading to negative cash flow. Ensure you account for these factors in the calculator above:
- Vacancy Rate: Properties are rarely occupied 100% of the time. A standard conservative estimate is 5-8% (about one month of vacancy per year).
- Maintenance & CapEx: Toilets break and roofs leak. Budgeting 5-10% of monthly rent for repairs is crucial.
- Management Fees: Even if you self-manage now, calculating a 10% management fee ensures the deal still works if you decide to hire a property manager later.
How to Use This Calculator
Start by inputting the purchase price and your financing details. Be honest with your expense estimates. The calculator will automatically deduct vacancy losses and operating expenses to derive your Net Operating Income (NOI). Finally, it subtracts the debt service (mortgage) to show your final monthly cash flow.
Pro Tip: Always run your numbers using "worst-case" scenarios (higher interest rates, higher vacancy) to ensure your investment remains safe during market downturns.