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Posted by Chase Real Estate Corfu on February 11, 2025
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How to Analyze a Rental Property Like a Pro

How to Analyze a Rental Property Like a Pro — Numbers You Must Know

Investing in rental properties is one of the best ways to build wealth and create passive income. However, not every property is a good deal. The key to making money in real estate is knowing how to analyze a rental property before you buy.

Want to invest like a pro? Here are the must-know numbers that separate profitable rental properties from financial disasters.

1. Purchase Price vs. After-Repair Value (ARV)

The purchase price is what you pay for the property, but the after-repair value (ARV) is what it’s worth after renovations.

Why It Matters:

  • If the ARV is significantly higher than the purchase price, you may have built-in equity.
  • If flipping or refinancing, aim to buy at 70-75% of the ARV to leave room for profit.

Pro Tip: Use Zillow, Redfin, or Realtor.com to compare similar properties in the area and estimate ARV.

2. Rental Income (Gross Rent)

Rental income is the backbone of cash flow. If the rent doesn’t cover expenses, the property won’t be profitable.

How to Calculate It:

  • First, check local rental rates using:
    • Rentometer (for long-term rentals)
    • AirDNA (for short-term rentals)

For example, if similar properties rent for $2,500/month, that’s your expected gross rent.

3. The 1% Rule

This quick formula helps investors screen potential properties:

Monthly Rent ≥ 1% of Purchase Price

Example:

  • Property Price: $250,000
  • Monthly Rent: $2,500 (Meets 1% Rule)
  • Monthly Rent: $1,500 (Fails 1% Rule)

If a property doesn’t meet the 1% Rule, it may not generate strong cash flow.

4. Operating Expenses (50% Rule)

Rental properties come with costs like property taxes, insurance, maintenance, and management fees. Fortunately, there’s a quick rule to estimate expenses.

Quick Rule: Total expenses = 50% of rental income.

Example:

  • Monthly Rent: $2,500
  • Estimated Expenses: $1,250 (50%)
  • Remaining Cash Flow: $1,250 before mortgage payments

Always verify actual expenses, especially in areas with high property taxes or HOA fees.

5. Cash Flow

Cash flow is what’s left after covering all property expenses, including the mortgage. It’s crucial for ensuring long-term profitability.

Cash Flow = Gross Rent – Operating Expenses – Mortgage Payment

Example:

  • Gross Rent: $2,500
  • Expenses: $1,250
  • Mortgage: $900
  • Cash Flow: $350/month (Positive)

A property with negative cash flow will cost you money every month.

6. Cap Rate (Capitalization Rate)

Cap rate measures how much income a property generates compared to its price.

Cap Rate = (Net Operating Income ÷ Purchase Price) × 100

Example:

  • Annual Net Income: $15,000 ($1,250/month after expenses)
  • Property Price: $250,000
  • Cap Rate: (15,000 ÷ 250,000) × 100 = 6%

Pro Tip:

  • A 5-10% cap rate is good for most markets.
  • Below 4% may not be worth the investment.

7. Cash-on-Cash Return (CoC Return)

This measures how much return you get on the cash you actually invest (down payment, closing costs, and repairs).

CoC Return = (Annual Cash Flow ÷ Total Cash Invested) × 100

Example:

  • Down Payment + Closing Costs + Repairs: $60,000
  • Annual Cash Flow: $4,200 ($350/month)
  • CoC Return: (4,200 ÷ 60,000) × 100 = 7%

Most investors aim for at least 8-12% cash-on-cash return.

8. Debt Service Coverage Ratio (DSCR)

Lenders use DSCR to assess whether a rental can cover its mortgage payments.

DSCR = Net Operating Income ÷ Debt Payments

Example:

  • Net Income: $15,000/year

  • Mortgage Payment: $10,800/year

  • DSCR: 15,000 ÷ 10,800 = 1.39

  • A DSCR above 1.2 is good.

  • Below 1.0 means the property won’t cover the mortgage.

9. Break-Even Ratio (BER)

This number shows how much vacancy you can afford before losing money.

BER = (Operating Expenses + Mortgage) ÷ Gross Rent

Example:

  • Operating Expenses: $1,250
  • Mortgage: $900
  • Gross Rent: $2,500
  • BER: (1,250 + 900) ÷ 2,500 = 86%

A low BER (under 85%) means you can survive some vacancies without losing money.

10. Appreciation Potential

While cash flow is key, appreciation can boost your long-term wealth.

Factors That Drive Appreciation:

  • Job growth and economic development
  • Infrastructure improvements
  • Gentrification and new businesses

Pro Tip: Check historical home price trends in your market to see if property values are rising.


Final Thoughts: Invest Smarter, Not Harder

Smart investors don’t buy based on gut feeling—they run the numbers. Before buying a rental property, analyze cash flow, cap rate, and return on investment to ensure it’s a profitable deal.

If a property meets these key financial metrics, it could be your next cash-flowing rental goldmine.

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