Rental analysis uses more than one return metric
“Rental property ROI” can refer to several related measures. DealYield keeps the main layers separate so one percentage does not hide the assumptions behind it:
- Monthly and annual pre-tax cash flow
- Net operating income
- Cap rate
- Cash-on-cash return
- Expense ratio
- Break-even rent and occupancy
- Rent sensitivity
Each metric answers a different question. NOI describes modeled property operations before financing. Cap rate compares NOI with property value. Cash flow subtracts debt service. Cash-on-cash return compares annual pre-tax cash flow with modeled upfront cash.
Build the income baseline
Start with expected monthly rent and an explicit vacancy allowance. DealYield calculates effective rent as monthly rent × (1 − vacancy rate).
The vacancy assumption represents more than an empty unit. Depending on the scenario, it may also need to reflect turnover and collection loss. The calculator does not determine a market vacancy rate; it keeps the user’s assumption visible.
List operating expenses explicitly
The Rental Property ROI calculator separates monthly property taxes, insurance, HOA, repairs, management, owner-paid utilities, capital-expenditure reserve, and other expenses.
That separation makes review easier. Repairs and capital reserves are not interchangeable: routine repairs address ordinary upkeep, while a reserve assumption recognizes less frequent major replacements. Actual costs vary by property, condition, location, and ownership plan.
Monthly NOI is effective rent minus operating expenses. Annual NOI is that amount multiplied by 12. Mortgage payment is excluded from NOI.
Add financing without mixing it into NOI
The mortgage baseline uses loan amount, annual interest rate, and loan term to calculate principal and interest. Monthly cash flow then subtracts both operating expenses and mortgage payment from effective rent.
This structure preserves two views:
NOI = effective rent − operating expensespre-tax cash flow = NOI − debt service
The same property can have identical NOI under two financing scenarios but different cash flow and cash-on-cash return.
Connect cash flow with upfront cash
DealYield’s Rental ROI baseline defines total cash invested as down payment plus closing costs. Annual pre-tax cash flow divided by that amount produces cash-on-cash return.
If the scenario includes rehab, initial reserves, points, or other cash that is not represented in those fields, account for that limitation when interpreting the result or use the dedicated Cash-on-Cash Return calculator with its broader upfront-cost fields.
Use break-even and sensitivity views
Break-even rent estimates the gross rent needed to cover modeled operating expenses and debt service after the vacancy assumption. Break-even occupancy compares required revenue with gross rent.
The rent sensitivity view reruns the same deterministic formula engine at lower and higher rent assumptions. It helps reveal whether a positive base result depends on a narrow rent estimate.
DealYield also warns when base monthly cash flow is positive but becomes zero or negative at 10% lower rent. That is a transparent stress-test heuristic, not a universal underwriting standard or recommendation.
Review the default example as a walkthrough
The default calculator scenario uses a $300,000 purchase price, 25% down, a 6.5% thirty-year loan, $2,700 monthly rent, 5% vacancy, and explicit operating and reserve amounts.
The example exists to demonstrate how the formulas connect. It is not a suggested financing structure, expense ratio, rent assumption, or target return.
What this baseline excludes
The MVP rental analysis does not automatically model:
- Appreciation or a future sale
- Income taxes, depreciation, or tax benefits
- Refinance proceeds
- State-specific landlord, transfer, or legal rules
- Complex rent rolls or multiple units with different leases
- Variable-rate financing or balloon-refinance scenarios
- Every repair, capital project, or closing item
Use cap rate to focus on property-level yield, NOI to audit operations, and DSCR to compare NOI with debt service.
A practical review sequence
- Verify rent and vacancy evidence.
- List recurring costs and reserves using consistent monthly units.
- Confirm loan amount, rate, term, and payment treatment.
- Review NOI separately from financing.
- Check cash flow and cash-on-cash return together.
- Inspect break-even and sensitivity results.
- Revisit every assumption that materially changes the outcome.
DealYield provides educational pre-tax estimates. Property performance and financing outcomes are uncertain; verify source data and consult qualified professionals before making financial, legal, lending, or tax decisions.