Break-Even Ratio

What Is Break-Even Ratio?

Break-even ratio = (Debt Service + Operating Expenses) ÷ Gross Rental Income. A property with $24,000 debt service, $18,000 operating expenses, and $48,000 gross rental income has BER = ($24,000 + $18,000) ÷ $48,000 = 87.5%. You need 87.5% of gross rent just to break even. Cash flow is the remaining 12.5%. Lower BER = more cushion; higher BER = thinner cash flow and more risk. Target BER under 85% for rental property—leaves 15%+ for vacancy and cash flow. DSCR is related but uses NOI (after operating expenses); BER is more conservative.

The break-even ratio (BER) is the percentage of gross rental income needed to cover debt service and operating expenses—the point at which cash flow is zero.

At a Glance

What it is: % of gross rental income needed to cover debt service + operating expenses
Why it matters: Safety metric; lower = more cushion
Formula: BER = (Debt Service + Operating Expenses) ÷ Gross Rental Income
Target: Under 85% for rental property
Relation: DSCR uses NOI; BER uses gross

Formula

BER = (Debt Service + Operating Expenses) ÷ Gross Income

How It Works

The math. Debt service = monthly P&I × 12. Operating expenses = property tax, insurance, maintenance costs, vacancy reserve, etc. Gross rental income = 12 × monthly rent. BER = (Debt Service + Operating Expenses) ÷ Gross Income. Express as percentage.

Interpretation. BER 85% = 85% of gross goes to debt service and operating expenses—15% is cash flow before vacancy and capex reserve. BER 95% = 5% left—thin. Vacancy of 5% would wipe cash flow. BER 75% = 25% cushion—healthy.

vs DSCR. DSCR = NOI ÷ Debt Service. NOI = Gross − Operating Expenses. BER is more conservative—it shows what % of gross is consumed before cash flow appears.

Real-World Example

Marcus's break-even on his Phoenix SFR. Gross rental income $31,200. Debt service $21,600. Operating expenses $9,600. BER = ($21,600 + $9,600) ÷ $31,200 = 100%. He's at break-even—no cash flow before vacancy or capex. A 5% vacancy would put him negative. He's banking on appreciation—risky. He should have targeted BER under 90%.

Pros & Cons

Advantages

Simple safety metric
Shows how much gross rental income is consumed
Lower BER = more cushion for vacancy and operating expenses variance
Complements DSCR (lender metric)
Easy to calculate from pro forma

Drawbacks

Ignores vacancy and capex reserve in the formula (though they're part of operating expenses if you include them)
Operating expenses can be understated in pro forma
Not a substitute for DSCR (lenders use that)

Watch Out

Pro forma trap: Verify operating expenses—sellers often understate
Break-even risk: BER at or above 100% = no cash flow; vacancy puts you negative
Reserve inclusion: Include vacancy and capex reserve in operating expenses for realistic BER

Ask an Investor

The Takeaway

Break-even ratio = (Debt Service + Operating Expenses) ÷ Gross Rental Income. It's the % of gross consumed before cash flow. Target under 85%. Lower = more cushion; higher = riskier.