Underwriting a Commercial Deal: Key Metrics Every Investor Should Know

A practical look at cap rate, IRR, cash-on-cash return, and the other numbers that drive smart acquisition decisions.

Sound underwriting is what separates disciplined investors from those chasing headline numbers. Before committing capital to a commercial real estate opportunity, a few core metrics deserve close attention.

Cap rate remains the quickest lens for comparing income-producing assets, calculated as net operating income divided by purchase price. It’s useful for benchmarking against the market, but it’s a snapshot — not the full picture.

Cash-on-cash return factors in financing, showing the actual return on the equity invested rather than the total asset value. For leveraged deals, this number often tells a more accurate story than cap rate alone.

Internal rate of return (IRR) accounts for the time value of money across the full hold period, capturing both operating income and the eventual sale or refinance. It’s the standard metric for comparing deals with different timelines and exit strategies.

None of these numbers work in isolation. A disciplined underwriting process weighs them together against submarket trends, tenant credit quality, and exit assumptions — which is exactly the kind of due diligence support Blair CRE provides investors evaluating opportunities in the Atlanta market.