What Is Return on Equity?
ROE = Annual Cash Flow ÷ Current Equity × 100. If your rental produces $12,000/year in cash flow and you have $200,000 in equity, your ROE is 6%. Compare that to your cash-on-cash return from year one—which was probably 10–12% when you had less equity. As your property appreciates and your mortgage pays down, equity grows but cash flow stays flat. ROE drops. Sophisticated investors set a floor—typically 6–10%—and when ROE falls below it, they explore a cash-out refinance, 1031 exchange, or sale to redeploy that equity into higher-yielding assets.
Return on equity (ROE) measures how hard your current equity is working—annual cash flow divided by the equity you have in the property today. When ROE drops too low, it signals trapped equity that could perform better elsewhere.
At a Glance
- What it is: Annual cash flow ÷ current equity in the property
- Why it matters: Reveals when equity is "lazy"—growing but underperforming
- Typical threshold: 6–15% depending on strategy and market
- Action triggers: Cash-out refi, 1031 exchange, or sell when ROE drops below your floor
ROE = Annual Cash Flow / Current Equity × 100
How It Works
The equity trap. You buy a $300,000 duplex with $60,000 down. Year one cash flow: $7,200. Cash-on-cash return: 12%. Five years later, the property is worth $400,000, your mortgage balance is $215,000, and your equity is $185,000. Cash flow has grown to $8,400. Your ROE: $8,400 ÷ $185,000 = 4.5%. Your money is working less than half as hard as it was on day one.
Why ROE declines over time. Two forces grow your equity: appreciation and mortgage paydown. But rent increases rarely keep pace. If your property appreciates 4% annually and your rents grow 3%, the denominator (equity) outpaces the numerator (cash flow). ROE compresses. This isn't a problem—it means you're building wealth. But it's a signal to act.
ROE vs. cash-on-cash return. Cash-on-cash return measures return on your original investment. ROE measures return on your current equity. In year one, they're identical. Over time, they diverge. Cash-on-cash stays high (your original investment is fixed); ROE drops (your equity grows). ROE tells you what's happening now. Cash-on-cash tells you how the original deal performed.
Total ROE. Some investors calculate a broader ROE that includes appreciation, principal paydown, and tax benefits—not just cash flow. This gives a fuller picture but mixes realized income (cash flow) with unrealized gains (appreciation). For decision-making about whether to hold, refinance, or sell, cash-flow-based ROE is more actionable.
Real-World Example
Tucson single-family rental. You bought a rental in 2020 for $220,000 with $44,000 down (20%). Monthly cash flow after all expenses: $550. Year-one ROE: ($550 × 12) ÷ $44,000 = 15%.
Fast forward to 2025. The property is now worth $310,000. Your mortgage balance is $168,000. Current equity: $142,000. Monthly cash flow has grown to $650. Current ROE: ($650 × 12) ÷ $142,000 = 5.5%.
You have $142,000 in equity earning 5.5%. If you did a cash-out refinance at 80% LTV, you could pull out roughly $80,000 ($310,000 × 0.80 = $248,000 – $168,000 = $80,000). Your monthly payment increases by about $500. Cash flow drops to $150/month on this property—but you now have $80,000 to deploy into a new property.
If that $80,000 goes into a $400,000 fourplex generating $900/month cash flow, your ROE on the redeployed capital is ($900 × 12) ÷ $80,000 = 13.5%. You turned one property earning 5.5% ROE into two properties—one breaking even and one earning 13.5%. Your portfolio cash flow went from $7,800/year to $12,600/year.
Pros & Cons
- Reveals declining returns that cash-on-cash hides
- Objective trigger for refinance, sell, or exchange decisions
- Forces you to think about opportunity cost of trapped equity
- Simple formula—easy to calculate for every property annually
- Uses current market value—which is an estimate, not a guaranteed number
- Cash-flow-only ROE ignores appreciation and tax benefits
- Refinancing to boost ROE increases debt and risk
- Current interest rates (6.5–7.5% in 2025) make cash-out refis less attractive than in low-rate environments
Watch Out
- Don't chase ROE at all costs. Refinancing at 7% to redeploy into a 5% cap rate property creates negative leverage. The math only works when the new investment yields more than your borrowing cost.
- Market value estimates can mislead. If you overestimate your property's value, you underestimate equity, and your ROE looks artificially high. Use conservative comps—what it would actually sell for after commissions, not Zillow's estimate.
- Tax consequences of selling. A sale triggers depreciation recapture and capital gains taxes unless you do a 1031 exchange. A $142,000 equity position might only net $110,000 after taxes. Factor that into your ROE comparison.
- Refinance timing with 1031s. The IRS may flag a cash-out refi done close to a 1031 exchange as disguised profit-taking. Don't refinance in the same tax year as an exchange without consulting a tax advisor.
Ask an Investor
The Takeaway
ROE = Annual Cash Flow ÷ Current Equity. It tells you how hard your equity is working right now—not how the original deal performed. As properties appreciate and mortgages pay down, ROE naturally declines. Sophisticated investors set a floor (6–10%) and act when ROE drops below it: cash-out refi to redeploy equity, 1031 exchange into a higher-yielding property, or outright sale. Track ROE annually for every property in your portfolio—it's the metric that prevents lazy equity.