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Investment Property Cash Flow Calculator
Analyze monthly cash flow, cap rate, cash-on-cash return, and NOI for any rental property — before you buy
Quick Overview
Who Should Use This
Real estate investors evaluating rental properties before buying, landlords analyzing existing portfolio performance, and buyers deciding if a property makes sense as a rental.
Purpose
Calculate monthly cash flow, annual NOI, cap rate, cash-on-cash return, and total ROI before committing to an investment property purchase.
Example
$400K rental, $80K down, 7% mortgage, $2,800/month rent — after all expenses generates $180/month positive cash flow and a 5.4% cash-on-cash return.
Property Details
Pro Tip: Don't skip vacancy, maintenance, and CapEx reserves. These "invisible" expenses are where new landlords most often underestimate costs. A realistic analysis includes all of them.
Cash Flow Results
Enter details to analyze
Fill in the property details and click Analyze to see your cash flow analysis.
Monthly Cash Flow
$0
after all expenses
Annual Cash Flow
$0
per year
Cap Rate
0.0%
NOI ÷ Purchase Price
Cash-on-Cash Return
0.0%
Annual CF ÷ Cash Invested
Monthly Income
Gross Monthly Rent$0
Vacancy Allowance-$0
Other Income$0
Effective Gross Income$0
Monthly Expenses
Mortgage (P&I)-$0
Property Tax-$0
Insurance-$0
Property Management-$0
Maintenance & Repairs-$0
CapEx Reserve-$0
HOA-$0
Utilities-$0
Total Monthly Expenses-$0
Investment Metrics
Loan Amount$0
Total Cash Invested$0
Net Operating Income (NOI)$0/yr
Cap Rate0.0%
Cash-on-Cash Return0.0%
Gross Rent Multiplier (GRM)0.0x
Debt Service Coverage (DSCR)0.00x
Expense Ratio0%
Quick Screening Rules
1% Rule: Rent ÷ Price0.00%
Target: ≥ 1.0% | Higher = better cash flow potential
50% Rule: Operating Expenses ÷ Rent0%
Rule of thumb: Operating expenses ~50% of rent (excl. mortgage)
DSCR0.00x
Lenders require ≥ 1.20x | Strong: ≥ 1.50x
How to Use
How to Analyze a Rental Property
Get a complete investment analysis in 4 steps
1
Enter Purchase Details
Input the purchase price, down payment (25% is standard for investment loans), interest rate, and estimated closing costs to establish your capital investment.
2
Enter Rental Income
Enter the expected monthly gross rent based on comparable rentals in the area. Include a realistic vacancy rate (5–8%) to model actual income — not best case.
3
Fill In All Expenses
Don't skip maintenance, CapEx reserves, or management fees. These are the most commonly underestimated expenses. Realistic expense modeling reveals true cash flow.
4
Analyze the Metrics
Review monthly cash flow, cap rate, cash-on-cash return, DSCR, and the quick screening rules to decide if this property meets your investment criteria.
What Is a Rental Property Cash Flow Analysis?
A cash flow analysis calculates what a rental property actually puts in your pocket each month after every expense is paid — including the mortgage, taxes, insurance, management fees, maintenance, vacancy, and capital expense reserves.
Most beginner investors only subtract the mortgage payment from the rent, which dramatically overstates cash flow. A professional analysis accounts for all operating costs and reserves, giving you a realistic picture of what the investment will actually produce.
Beyond monthly cash flow, the analysis calculates cap rate (return assuming all-cash purchase), cash-on-cash return (return on your actual cash invested), and DSCR (whether the property qualifies for investment financing).
Key Metrics Every Investor Needs
- Monthly Cash Flow: Net income after all expenses. Target: $100–$300+ per unit per month in most markets.
- Cap Rate: NOI ÷ Purchase Price. The market-standard return measure. Target: 5–8% in most markets.
- Cash-on-Cash Return: Annual cash flow ÷ Cash invested. Measures leverage efficiency. Target: 6–12%.
- DSCR: NOI ÷ Annual mortgage payments. Lenders require 1.20–1.25x minimum. Stronger is better.
- GRM: Purchase Price ÷ Annual Rent. Lower is better. Under 10x is generally favorable.
Investor Education
Rental Property Investing Essentials
Key concepts for every real estate investor
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The 1% Rule
Monthly rent should be ≥ 1% of purchase price for likely positive cash flow. A $200K property needs $2,000/month rent. In most major metros this is hard to achieve — use it as a screening filter, not a guarantee.
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CapEx Reserves Matter
Capital expenditures (roof, HVAC, appliances, plumbing) are often ignored until they hit. Budget 5–10% of rent monthly into reserves. Skipping this turns a $200/month cash flow property into a money pit when the roof needs replacing.
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Management Fees
If you use a property manager (8–12% of rent), this is your largest operating expense after the mortgage. Self-managing saves the fee but costs time. Factor in management fees even if self-managing now — you may not always be able to.
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Cap Rate vs CoC Return
Cap rate ignores financing (assumes all cash). Cash-on-cash includes your mortgage and measures leverage efficiency. A property with a 6% cap rate and 10% CoC return means leverage is working in your favor — the financing cost is lower than the cap rate.
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Investment Loan Requirements
Investment property loans require 20–25% down, higher rates (+0.5–0.75% vs primary residence), and lenders check DSCR. Some DSCR-specific loan programs qualify based on rental income alone, not personal income — useful for investors with multiple properties.
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Total Return = Cash Flow + Equity
Monthly cash flow is only part of the return. Add mortgage paydown (tenant pays your principal) plus appreciation over time. A property with modest cash flow in an appreciating market can still deliver excellent total returns over a 10+ year hold.
Common Questions
Investment Property FAQ
Cash flow targets vary by market and investor strategy:
- Cash flow markets (Midwest, South): $200–$500+/month per unit is achievable
- Hybrid markets (Southeast, Southwest): $100–$300/month typical
- Appreciation markets (coastal metros): $0–$150/month or even slightly negative
Many successful investors accept lower cash flow in high-appreciation markets, betting on equity growth to drive total returns. A property that barely cash flows in a market appreciating 5–7%/year may outperform a high-cash-flow property in a flat market over 10 years.
Red flags: Negative cash flow that doesn't improve, properties where you'd be covering the mortgage from personal income every month, or markets with declining rents and population.
Formula: Cash-on-Cash Return = Annual Cash Flow ÷ Total Cash Invested
Example:
- Purchase Price: $300,000
- Down Payment (25%): $75,000
- Closing Costs: $6,000
- Total Cash Invested: $81,000
- Annual Cash Flow: $4,800 ($400/month)
- Cash-on-Cash Return: $4,800 ÷ $81,000 = 5.9%
Cash-on-cash measures how efficiently your invested dollars are working. A 5.9% return means every $100 you invested returns $5.90/year. Compare to other investments: the S&P 500 historically averages 7–10%, but real estate also has equity appreciation, tax benefits, and depreciation deductions.
The most commonly underestimated or forgotten expenses:
- CapEx reserves — Roof, HVAC, appliances all have lifespans. Reserve 5–10% of rent monthly or you'll be caught off guard with a $12,000 repair bill.
- Vacancy — Even great landlords experience 1–2 months vacancy per year at some point. Budget 5–8% of gross rent as a vacancy factor.
- Turnover costs — Cleaning, painting, minor repairs between tenants: $500–$2,000 per turnover, averaging out to $50–$150/month.
- Property management — Even self-managing landlords should factor this in: you may not always be able or willing to manage the property.
- Landlord insurance — Homeowner's insurance doesn't cover rental activity. Landlord policies cost more and protect against liability and rent loss.
Cap Rate = Annual NOI ÷ Purchase Price
NOI excludes the mortgage — it's a property-level metric that measures investment quality independent of how you finance it.
How to use cap rate:
- Compare properties in the same market (apples-to-apples without financing differences)
- Gauge market-level risk (high cap rate areas = higher risk/reward)
- When cap rate > your loan rate, leverage amplifies returns (positive leverage)
- When cap rate < your loan rate, leverage hurts returns (negative leverage)
Typical cap rates by market type:
- High-cost coastal (NYC, LA, SF): 3–4%
- Major metros (Phoenix, Dallas, Atlanta): 4–6%
- Mid-tier markets (Columbus, Memphis, Birmingham): 6–8%
- Small markets: 8–12%+
Investment property loan requirements vary by loan type:
- Conventional investment loan: 15–25% down (15% for 1-unit, 25% for 2–4 units)
- DSCR loan: 20–25% down, qualifies on rental income only
- Portfolio loan: 20–30% down, held by lender (not sold to Fannie/Freddie)
- Hard money: 25–35% down, short-term, high rate — for flips or quick acquisition
You cannot use FHA or VA loans for investment properties (only primary residences). Some investors "house hack" — buy a 2–4 unit property as a primary residence with 3.5% down (FHA), live in one unit, and rent the others.
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