Rental Property Calculator
A rental property calculator estimates cash flow and return metrics from rent, expenses, financing, and purchase assumptions. Treat the output as a scenario, not a verdict, because taxes, insurance, repairs, vacancy, and financing terms can change the result.
Estimates are based on your inputs and assumptions. DealSharp does not provide financial, investment, legal, tax, or lending advice.
Run the number, then pressure-test the assumptions.
A rental property calculator estimates cash flow and return metrics from rent, expenses, financing, and purchase assumptions. Treat the output as a scenario, not a verdict, because taxes, insurance, repairs, vacancy, and financing terms can change the result.
Use this page to understand the metric directionally, then compare it against financing, reserves, repair risk, cash flow, and your own constraints.
Use this working calculator as a starting point, then run the full deal in DealSharp when you need more inputs, side-by-side scenarios, and risk context.
Monthly cash flow = effective monthly rent - monthly operating expenses - monthly debt service
If rent is $2,000, vacancy is 5%, operating expenses are $650, and the mortgage payment is $1,000, estimated monthly cash flow is $250.
Assumptions
Rental property scenario
Estimated outputs
Scenario snapshot
Scenario estimate based on the inputs shown here. Use the full DealSharp app to compare financing, repairs, vacancy, cash flow, and risk assumptions before deciding.
How to read this number
The useful move is not treating one number as a final answer. Use it to decide which assumptions deserve more review, then compare the result against cash flow, financing, reserves, repair risk, and your own constraints.
Inputs required
- Metric inputs shown in the formula or calculator.
- Income, expense, debt, value, and cash assumptions where relevant.
- Investor-provided numbers that should be checked against source documents.
Outputs explained
- Scenario estimate based on the inputs.
- Plain-English context for comparing the metric.
- Limitations and assumptions to review before relying on the result.
Assumptions to review
- Inputs are estimates supplied by the user.
- Market rent, lender terms, taxes, insurance, repairs, and legal details can change the result.
- DealSharp does not provide financial, investment, legal, lending, tax, or accounting advice.
What this tells you
- Positive cash flow can indicate more room between income and monthly obligations under your assumptions.
- Cap rate helps compare the property before financing, while cash-on-cash return shows the relationship between annual cash flow and cash invested.
- DSCR estimates how much operating income covers debt service.
What this does not tell you
- The result does not verify rent comps, repair scope, tax reassessment, insurance quotes, financing review, or legal risk.
- It does not make purchase recommendations. It only organizes the numbers you provide.
Common mistakes
- Forgetting vacancy and property management.
- Using mortgage payment only and ignoring repairs, CapEx, taxes, insurance, and HOA fees.
- Using optimistic rent without checking comparable rentals.
FAQ
What inputs matter most in a rental property calculator?
Rent, vacancy, operating expenses, debt service, purchase price, and cash invested usually drive the largest changes.
Can a calculator tell me if a rental is a good deal?
No. It can model a scenario, but property condition, market risk, financing, reserves, and your goals still matter.
Run the full deal before deciding
This page helps with one metric or workflow. DealSharp is built for full real estate deal analysis: assumptions, financing, cash flow, repair scenarios, DSCR, cap rate, and risk flags based on your inputs.
Open DealSharpDisclaimer
DealSharp provides calculation and scenario-modeling tools for informational purposes only. Outputs are estimates based on your inputs and assumptions. DealSharp does not provide financial, investment, legal, lending, tax, or accounting advice. Verify important decisions with qualified professionals.