Loss to Lease, Explained

Loss to lease is the gap between the market rent a unit could command and the lower in-place rent a tenant is paying today. It is real upside — not a renovation projection — because it recaptures itself naturally as leases roll over and renew to market, requiring zero capital.

You calculate it by sizing the per-unit rent gap, multiplying by the unit count, and annualizing. The result is the income a property is leaving on the table simply because contract rents lag the market — a normal condition in any property where the seller has not pushed renewals aggressively.

The distinction that matters most is loss to lease versus value-add. Loss to lease is captured for free, by renewing tenants to the rent the market already supports. Value-add requires spending renovation capital to push rents above today's market. A well-underwritten deal separates the two cleanly: free upside from rolling leases to market, then incremental upside from capital improvements. Confusing them is how buyers overpay — crediting themselves capital-free income that actually requires a renovation budget.

Worked example — recapture at renewal

Annual loss to lease = 100 × $150 × 12 = $180,000/yr, recaptured simply by renewing tenants to market — zero capital required.

The discipline: loss to lease is free upside captured at renewal; do not confuse it with capital-intensive value-add.

Loss to lease is the first thing you quantify when you read a rent roll, and it sits one step before any value-add renovation plan. Underwrite it net of normal vacancy and credit loss so you are recapturing realistic income, not a gross-rent fantasy.