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Rental Property ROI Calculator Spreadsheet: Analyze Deals Before You Buy

The difference between a profitable rental property and a money pit often comes down to the math done before the purchase. Emotions and gut feelings have no place in real estate investing. A rental property ROI calculator spreadsheet runs every number, from cap rate to cash-on-cash return, so you can compare deals objectively and invest with confidence.

Why You Cannot Trust Listing Agent Math

Listing agents present properties in the best possible light. Pro forma income statements assume 100% occupancy, ignore capital expenditure reserves, and often use below-market expense estimates. Your calculator needs to use YOUR assumptions based on real market data, not the seller's fantasy numbers.

Key Metrics Your Calculator Must Include

**Cash-on-Cash Return**

  • Total annual cash flow divided by total cash invested
  • Includes down payment, closing costs, and initial repairs
  • The single most important metric for evaluating leverage
  • Target: 8-12% for most markets in 2026

    • **Cap Rate (Capitalization Rate)**

  • Net operating income divided by purchase price
  • Removes financing from the equation for apples-to-apples comparison
  • Useful for comparing properties regardless of how you finance them
  • Market dependent: 4-6% in expensive metros, 8-12% in secondary markets

    • **Gross Rent Multiplier**

  • Purchase price divided by gross annual rent
  • Quick screening tool (lower is generally better)
  • Does not account for expenses so never use alone

    • **Net Operating Income (NOI)**

  • Gross rental income minus all operating expenses
  • Does NOT include mortgage payments or income taxes
  • The foundation for cap rate and debt service coverage

    • Expense Categories to Model

    **Fixed Expenses**

  • Property taxes (verify with county assessor, not listing)
  • Insurance (get a quote, do not use seller's number)
  • HOA fees if applicable

    • **Variable Expenses**

  • Property management (8-12% of gross rent even if self-managing)
  • Maintenance and repairs (budget 5-10% of gross rent)
  • Vacancy allowance (5-10% depending on market)
  • Capital expenditure reserve (roof, HVAC, water heater replacement cycle)
  • Utilities if landlord-paid

    • **Debt Service**

  • Monthly mortgage payment (principal + interest)
  • PMI if putting down less than 20%

    • Running the Numbers

    Input your purchase price, expected rent, expenses, and financing terms. The spreadsheet should auto-calculate monthly cash flow, annual cash flow, cash-on-cash return, cap rate, and a 5-year projection including appreciation and principal paydown. If the numbers do not work at your target return, walk away. There will always be another deal.

    Download Your ROI Calculator

    Get a professional rental property ROI calculator spreadsheet with all metrics, expense modeling, and multi-year projections at [our catalog](https://kincaidandle.com/catalog). Also at [our Gumroad store](https://lunamaile.gumroad.com).

    Run the numbers. Trust the math. Invest smarter.

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    *Kincaid and Le Companies LLC*

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