Rental Property Cash Flow — FAQ
25 answers to the most common rental property analysis questions.
What is rental property cash flow?
Cash flow is the money left after collecting rent and paying all expenses including mortgage, taxes, insurance, maintenance, and property management. Positive cash flow means the property puts money in your pocket each month.
What is a good monthly cash flow for a rental property?
A common rule of thumb is 00-300 per door per month for a good cash-flowing property. In expensive markets, 0-100/month may be acceptable if appreciation upside is strong.
What is cap rate and why does it matter?
Cap rate (capitalization rate) = NOI / property price. It measures a property income-generating potential independent of financing. A 5-8% cap rate is generally considered good in most US markets.
What is cash-on-cash return?
Cash-on-cash (CoC) return = annual cash flow / cash invested (down payment + closing costs). A 8-12% CoC return is considered strong. It tells you how efficiently your cash investment is working.
What is Gross Rent Multiplier (GRM)?
GRM = purchase price / annual gross rent. A lower GRM means you are paying less per dollar of rent. GRM of 8-12 is generally acceptable; below 8 is excellent for cash flow.
How do I calculate Net Operating Income (NOI)?
NOI = Gross Rental Income - Vacancy Loss - Operating Expenses (taxes, insurance, maintenance, management). NOI does NOT include mortgage payments.
What expenses should I include in my analysis?
Include: property taxes, insurance, maintenance (budget 1% of value/year), property management (8-12% of rent), vacancy (5-10% of rent), utilities if landlord-paid, and HOA fees if applicable.
What vacancy rate should I use?
Most investors use 5-10%. In high-demand urban markets, 5% is reasonable. In smaller markets or with older properties, use 8-10%. Check local vacancy data from the Census Bureau or CoStar.
Should I include property management fees even if I self-manage?
Yes. Always include property management costs even if you self-manage. This accounts for your time and shows the true economics if you ever hire a manager or sell to another investor.
How does the 1% rule work?
The 1% rule says monthly rent should be at least 1% of the purchase price (00K property = ,000/month rent). It is a quick screening filter — properties passing it usually cash flow positively.
What is the 50% rule?
The 50% rule estimates that operating expenses (excluding mortgage) equal 50% of gross rents. So a ,000/month rental has ~,000/month in expenses. It is a rough screening tool, not a substitute for real analysis.
How does leverage affect cash-on-cash return?
More leverage (higher LTV) typically increases cash-on-cash return when cap rate exceeds mortgage rate, but increases risk. All-cash purchases have lower CoC but more stable cash flow.
What is a good cap rate to buy at?
Cap rates vary significantly by market. Primary metros (NYC, SF, LA) may have 3-4% cap rates. Secondary markets often offer 6-8%. Tertiary markets may yield 8-10%+. Compare to local market averages.
What is DSCR and why do lenders care about it?
Debt Service Coverage Ratio = NOI / Annual Debt Service. Most lenders require DSCR of 1.20-1.25, meaning the property generates 20-25% more income than needed to cover the mortgage.
How do I factor in appreciation?
Our calculator focuses on cash flow. For appreciation, US residential real estate has historically appreciated 3-4% annually. This should be considered separately from cash flow analysis.
What is the difference between gross and net rent?
Gross rent is what the tenant pays. Net rent is after vacancy loss — if your unit rents for ,000/month but is vacant 1 month/year, effective gross rent is ,833/month.
Should I account for future rent increases?
Our calculator uses current rent. For long-term projections, note that rents have historically increased 2-4% annually. Most markets have some form of rent control limit worth researching.
How do interest rates affect rental property analysis?
Higher interest rates increase debt service, reducing cash flow and CoC return. When rates rise, purchase prices often fall to maintain investor returns. Always model multiple rate scenarios.
What is a turnkey rental property?
A turnkey property is move-in ready with a tenant already in place. They typically sell at a premium over fixer-uppers but require less capital and time to start generating cash flow.
How do multi-family properties compare to single-family for cash flow?
Multi-family properties generally cash flow better per dollar invested. They also have lower vacancy risk — one vacancy in a 4-plex means 25% vacancy vs. 100% in a single-family home.
What insurance do rental property owners need?
At minimum: landlord insurance (covers the structure and lost rental income). If you have a mortgage, the lender will require hazard insurance. Umbrella liability is highly recommended.
How do property taxes affect cash flow?
Property taxes vary widely — from 0.3% (Hawaii) to 2.5% (Illinois) of assessed value annually. Always verify current tax amounts with the county assessor before purchasing.
What maintenance budget should I use?
The 1% rule: budget 1% of property value per year for maintenance. An older property may need 1.5-2%. New construction may need only 0.5% in early years. Always have reserves.
What is cap rate compression and how does it affect investors?
Cap rate compression occurs when prices rise faster than rents (cap rates fall). It benefits existing owners (appreciation) but makes new acquisitions less attractive for cash flow investors.
How accurate is this calculator?
Our calculator uses the inputs you provide and standard real estate formulas. Accuracy depends on the quality of your inputs. Always verify tax, insurance, and comparable rent data before purchasing.