Rental Property Cash Flow Calculator
Find a rental’s monthly cash flow, cap rate and cash-on-cash return from the price, rent, expenses and loan.
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Cash Flow per Month
- Effective income
- Operating expenses
- Net operating income
- Mortgage P&I
- Cap rate
- Cash-on-cash return
- Gross rent multiplier
- 1% rule
- Cash Invested
Properties
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| Property | Price | Rent | Cash Flow/Mo. | Cap Rate | CoC | Remove |
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How to Analyze a Rental Property
Start with the rent you can actually collect after vacancy, subtract operating expenses to get net operating income (NOI), then subtract the mortgage payment to get cash flow.
NOI = (rent + other income) × (1 − vacancy) − operating expenses
Cash flow = NOI − mortgage principal and interest
Cap rate = annual NOI ÷ price Cash-on-cash = annual cash flow ÷ cash invested
Gross rent multiplier = price ÷ annual gross rent 1% rule: monthly rent ≥ 1% of price
Operating expenses don't include the mortgage. Cash invested is the down payment plus closing costs and up-front repairs.
Worked Example
Tips
Budget for maintenance and capital expenses (roof, HVAC, appliances) even when nothing is broken; 5% to 15% of rent is a common planning range. Cap rate ignores financing, so it's good for comparing properties; cash-on-cash shows what your own money earns. The 1% rule is a quick screen, not an analysis.