Break-Even Ratio for Rental Property: How Lenders Measure Your Margin of Safety

What Is the Break-Even Ratio?

The break-even ratio, sometimes called the break-even occupancy, measures what percentage of a property gross income is used up by operating expenses plus the mortgage payment. It tells you how much of your rent must come in before the property simply covers its costs.

A break-even ratio of 85% means the property needs 85% of its potential income just to break even, leaving a 15% cushion before it turns negative. Lower is safer.

How to Calculate It

Add annual operating expenses to annual debt service, then divide by gross operating income, the rent you would collect at full occupancy. Multiply by 100 to express it as a percentage.

Because it folds the mortgage into the calculation, the break-even ratio captures leverage risk that cap rate leaves out. A property with a healthy cap rate can still have a dangerously high break-even ratio if it is heavily financed.

Worked Example

A rental has $30,000 of gross operating income, $12,000 of operating expenses, and $13,000 of annual debt service. Expenses plus debt total $25,000.

Dividing $25,000 by $30,000 gives a break-even ratio of about 83%. The property can lose up to 17% of its income, to vacancy or lower rents, before it stops covering its own costs.

Why Lenders and Investors Watch It

• It shows the margin of safety between full income and the point where the property runs at a loss.
• A ratio near 100% means almost any vacancy or rent dip pushes the property negative.
• Lenders often prefer a break-even ratio at or below roughly 85% on stabilized rentals.
• It complements DSCR: DSCR measures coverage, the break-even ratio measures how much income you can afford to lose.
• Rising expenses or interest rates push the ratio up, shrinking your cushion.

Using It in Your Analysis

Compare the break-even ratio with your realistic vacancy assumption. If you expect 8% vacancy and the break-even ratio implies you can only absorb 5%, the deal has no safety margin and should be repriced or passed on.

Stress test it by raising expenses or the interest rate and watching how quickly the ratio approaches 100%. A deal that stays comfortably below break-even under stress is far more resilient than one that only works at full occupancy.

Frequently Asked Questions