5 Key Metrics Every Real Estate Investor Should Know
- The team at WiseDoor.net

- Aug 20
- 2 min read
Updated: Sep 14
When you’re investing in real estate, numbers tell the story. Just like a pilot relies on instruments to navigate through the clouds, a real estate investor must rely on key financial metrics to avoid turbulence and land profitable deals. Whether you’re buying your first rental property or managing a growing portfolio, these five metrics are the compass that will keep you on course.
1. Cap Rate (Capitalization Rate)
The cap rate is your quick snapshot of a property’s potential return if you bought it with cash. It’s calculated by dividing the property’s Net Operating Income (NOI) by its purchase price.
Why it matters: It gives you a baseline to compare properties in the same market.
Investor tip: Higher isn’t always better—sometimes a lower cap rate means a safer, more stable market.
2. Cash-on-Cash Return
This metric looks at the annual cash flow you earn compared to the actual cash you’ve invested. It’s especially important for investors using financing.
Why it matters: It tells you how hard your money is working in real terms.
Example: If you invest $50,000 and your annual cash flow is $5,000, your cash-on-cash return is 10%.
3. Debt Service Coverage Ratio (DSCR)
Lenders love this one. DSCR measures how well your property’s income covers its debt payments.
Formula: NOI ÷ Annual Debt Service.
Why it matters: A DSCR of 1.25 or higher usually signals to banks that your investment is safe.
Investor tip: If your DSCR is below 1.0, you’re losing money before you’ve even considered vacancies or repairs.
4. Gross Rent Multiplier (GRM)
Think of GRM as the “rule of thumb” metric. It’s the property’s price divided by its gross annual rental income.
Why it matters: It helps you quickly compare properties, though it doesn’t factor in expenses.
Example: A property priced at $300,000 generating $30,000 in gross rent has a GRM of 10.
5. Internal Rate of Return (IRR)
IRR is the long-term player’s metric. It accounts for cash flow, appreciation, and the time value of money—giving you a complete picture of your investment’s performance over time.
Why it matters: IRR helps you compare deals of different sizes and timelines on equal footing.
Investor tip: Use IRR when deciding between holding a property long-term or flipping it.
Final Thoughts
The best investors don’t just buy properties—they buy numbers that make sense. By mastering these five metrics, you’ll be able to separate winners from money pits with confidence.
And here’s the good news: you don’t need to do all the math by hand. At WiseDoor.net, you’ll find free calculators and analysis tools that make it easy to evaluate deals, compare scenarios, and grow your portfolio like a pro.
Ready to put these metrics into action? Try the WiseDoor real estate analysis tools today and see how your next deal stacks up.



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