🏘️ Investment Property Calculator
Analyze rental property investments with cap rate, cash flow, and ROI calculations
💰 Property Details
📊 Investment Analysis
Analysis
Monthly Cash Flow
Annual Cash Flow
Cap Rate
Cash-on-Cash Return
Total ROI
1% Rule Check
GRM
Total Cash Invested
Future Property Value
📚 Understanding Investment Property Metrics
Key Metrics Explained
Cap Rate (Capitalization Rate)
Cap rate measures the property's profitability without considering financing. It's calculated as Net Operating Income (NOI) divided by purchase price. Higher is generally better.
- Great: 10%+ (rare in most markets)
- Good: 8-10%
- Average: 5-8%
- Poor: <5% (may still work with appreciation)
Cash-on-Cash Return (CoC)
CoC measures the actual return on YOUR money invested (not the bank's). It's annual pre-tax cash flow divided by total cash invested.
- Excellent: 12%+
- Good: 8-12%
- Average: 5-8%
- Poor: <5%
Total ROI
Total return including cash flow, equity buildup, and appreciation over your holding period. This is your TRUE return on investment.
Net Operating Income (NOI)
Gross rental income minus operating expenses (excludes mortgage payment). This is what the property earns before debt service.
Gross Rent Multiplier (GRM)
Purchase price divided by annual gross rent. Quick screening tool - lower is better. Most investors look for GRM under 15.
Rules of Thumb
1% Rule
Monthly rent should be at least 1% of the purchase price. For example, a $200,000 property should rent for $2,000/month.
- If it passes: Likely positive cash flow
- If it fails: May still work with large down payment or appreciation
- Note: Harder to achieve in expensive markets (CA, NY, etc.)
50% Rule
Operating expenses (excluding mortgage) will be approximately 50% of gross rental income. Useful for quick estimates when you don't know exact expenses.
What Makes a Good Investment Property?
- Positive Cash Flow: Making money each month after ALL expenses
- Cap Rate 7%+: Strong property fundamentals
- CoC Return 8%+: Good return on invested capital
- Growing Market: Population and job growth in the area
- Low Vacancy: Strong rental demand (vacancy <5-8%)
- Below Market Purchase: Bought at discount or with value-add opportunity
Red Flags to Avoid
- ❌ Negative Cash Flow: Losing money every month
- ❌ Cap Rate <4%: Overpaying for the income generated
- ❌ Declining Market: Population decline, job losses
- ❌ High Vacancy: >10% vacancy means weak rental demand
- ❌ Hidden Costs: Old roof, foundation issues, deferred maintenance
- ❌ Overly Optimistic Projections: Unrealistic assumptions
The 4 Ways You Make Money
- Cash Flow: Monthly income after all expenses = passive income
- Appreciation: Property value increases over time
- Equity Buildup: Tenants pay down your mortgage = forced savings
- Tax Benefits: Depreciation, deductions reduce tax burden
Common Expense Categories
- Property Tax: Annual tax (varies by location: 0.5%-2.5% of value)
- Insurance: Landlord policy ($800-2,000/year typical)
- Maintenance: 1% of property value annually
- Vacancy: 5-10% of gross rent
- Property Management: 8-12% of gross rent (if hired)
- CapEx Reserve: Save for big items (roof, HVAC) - $100-200/month
Tips for Success
- Run conservative numbers - better to be pleasantly surprised
- Always have cash reserves for unexpected expenses
- Screen tenants thoroughly to avoid problem renters
- Consider property management if you don't want to be hands-on
- Focus on cash flow first, appreciation second
- Buy in areas with strong job growth and population growth
- Understand your local market and rental demand
Frequently Asked Questions
What is a good cap rate for rental property?
A good cap rate varies by market, but generally 8-10% is considered good, 5-8% is average, and below 5% is poor. In expensive markets like San Francisco or New York, cap rates of 3-5% are common, with investors banking on appreciation. In less expensive markets, you might find cap rates of 10%+ with strong cash flow.
Should I invest in a property with negative cash flow?
Generally, no. Negative cash flow means you're losing money every month, which can be risky if you face unexpected expenses or vacancies. However, some investors accept negative cash flow in high-appreciation markets, betting that property value increases will offset monthly losses. This is speculative and risky, especially for beginners.
What's the difference between cap rate and cash-on-cash return?
Cap rate measures the property's profitability without considering financing (NOI / purchase price). Cash-on-cash return measures YOUR actual return on the money YOU invested (annual cash flow / total cash invested). CoC is usually more relevant for leveraged investments because it shows your actual return on invested capital.
How much should I budget for maintenance and repairs?
A common rule of thumb is 1% of the property value annually, or $100-200 per unit per month. For a $300,000 property, budget $3,000/year or $250/month. Older properties may need more. Also set aside a CapEx (capital expenditure) reserve for big-ticket items like roofs, HVAC systems, and water heaters.
What vacancy rate should I use?
A typical vacancy rate is 5-10%, even with great tenants. Units are vacant during turnover, and you may have occasional longer vacancies. In strong rental markets, 5% is reasonable. In weaker markets or with higher turnover, use 8-10%. Never assume 0% vacancy - that's unrealistic and will lead to disappointment.
Should I hire a property manager?
It depends on your situation. Property managers typically charge 8-12% of gross rent. Hire one if: you live far from the property, don't have time for management, want to scale to multiple properties, or don't want to deal with tenant issues. Self-manage if you're local, have time, want to save money, and don't mind being hands-on.
What's a good cash-on-cash return?
A cash-on-cash return of 8-12% is considered good, 12%+ is excellent, and below 5% is poor. Compare it to alternative investments: the stock market historically returns about 10% annually. Your CoC should be competitive with other investment options, considering the work and risk involved in real estate.