Loss-to-Lease

What loss-to-lease means

Every leased property collects two kinds of rent at once. There is the rent written into the current leases, often called contract rent or in-place rent, and there is the rent the same space would fetch if it were leased today at prevailing market rent. When the contract rent sits below market, the difference is the loss-to-lease. It is not a loss in the accounting sense of money that disappeared. It is potential income that the property is not yet collecting because its leases were signed earlier, at lower rates, and have not yet caught up.

This gap exists because leases are signed at points in time and then held for months or years, while the market keeps moving. A tenant who signed a five-year lease three years ago may be paying a rate that reflected conditions back then. If demand has strengthened since, the space is worth more today than the lease reflects, and that unrealized increment is the loss-to-lease for that unit. Sum it across every occupied space and you have the property-level figure.

Loss-to-lease is the inverse of gain-to-lease, which occurs when in-place rents sit above current market. A property can hold both at once: some units below market and some above, with the net of the two telling owners whether the rent roll as a whole is positioned to rise or to soften when leases renew. The concept applies broadly, appearing in apartments and multifamily as readily as in office, retail, and industrial assets.

Why loss-to-lease matters in commercial real estate

Loss-to-lease matters because it represents a path to higher income that does not depend on the broader market climbing further. The upside is already present in the property. It is simply waiting to be realized as below-market leases expire and reset to current rates. For an owner, that makes it one of the cleanest measures of embedded value in a rent roll.

This is why underwriters and acquisitions teams study it so closely. When evaluating a property, a buyer wants to know not only what it earns today but what it can earn as leases turn over. A large loss-to-lease signals meaningful organic growth ahead, since each renewal or new lease can be written closer to market. Capturing, or burning off, that loss-to-lease becomes a source of net operating income growth that the owner can pursue through ordinary leasing activity rather than relying on rents across the market continuing to rise.

The figure also informs valuation directly. Two properties with identical current income can be worth very different amounts if one is fully marked to market and the other carries substantial below-market leases. The property with the larger loss-to-lease holds more runway, and a thoughtful buyer will pay for that runway, discounted for the time and the leasing effort required to realize it. A lender, by contrast, may underwrite more conservatively to in-place rents, treating the loss-to-lease as upside rather than as a sure thing.

Finally, loss-to-lease offers a diagnostic on how a property has been managed. A persistently wide gap can indicate that leasing teams have been slow to push renewals toward market, that leases lack adequate escalations, or that the prior owner prioritized occupancy over rate. A narrow gap, on the other hand, suggests the rent roll is already close to its ceiling, so future income growth will have to come from raising market rents themselves rather than from catching up to them.

How loss-to-lease is calculated

The calculation is straightforward in concept: compare what the property could earn at market against what it earns under contract. The discipline lies in defining each input consistently so the number means the same thing every time it is reported.

Gross potential rent vs. in-place rent

Start with gross potential rent, the total rent the property would collect if every unit were leased at full market rate with no vacancy and no concessions. Against that, place the scheduled or contract rent, the sum of the actual rents written into the current leases. The loss-to-lease is the difference between the two:

Loss-to-lease = gross potential rent at market − scheduled contract rent.

When that result is positive, in-place rents are below market and the property carries a loss-to-lease. When it is negative, in-place rents exceed market and the property carries a gain-to-lease instead.

Expressing it as a percentage

Because a raw dollar figure means little without context, loss-to-lease is often shown as a percentage of gross potential rent. Dividing the dollar gap by gross potential rent at market produces a rate that lets owners compare units, buildings, and whole portfolios on equal footing. A property running a four percent loss-to-lease is positioned very differently from one running fifteen percent, and the percentage view makes that contrast immediate regardless of property size.

A simple example

Consider a small building with ten identical suites. Market rent for each suite is one hundred dollars per month, so gross potential rent is one thousand dollars. The in-place leases, signed at various earlier dates, total nine hundred dollars per month. The loss-to-lease is one hundred dollars per month, or ten percent of gross potential rent. As each lease renews and resets toward the current one hundred dollar market rate, that gap narrows and the property collects more income without any change in market conditions. If, instead, the in-place leases totaled one thousand fifty dollars, the property would show a fifty dollar gain-to-lease, a warning that renewals could reset downward.

What drives loss-to-lease

Loss-to-lease is not random. It accumulates through a recognizable set of forces, and understanding them helps owners judge whether a gap is a temporary feature or a structural problem.

• Market rent growth, the most common driver, occurs when prevailing rents climb faster than the in-place leases that were signed before the rise. The longer market rents have been accelerating, the wider the gap on older leases tends to grow.
• Long lease terms lock rents in place for years, so a property full of long leases naturally drifts below market as time passes, while one with shorter terms resets more frequently and stays closer to current rates.
• Weak or absent escalations leave in-place rents flat or only modestly rising, so even contractual bumps may fail to keep pace with a faster-moving market and the gap widens over the lease term.
• Concessions and free rent granted at signing lower the effective rent a tenant pays, which can depress the in-place figure relative to face market rents and contribute to a measured loss-to-lease.
• Below-market renewals, where a leasing team prioritizes retaining a tenant over pushing rate, hold contract rents under market even at the moment a lease resets, perpetuating the gap rather than closing it.
• Prior ownership strategy, such as an owner that chased occupancy with aggressive pricing, can leave a rent roll deeply below market and hand the next owner a large loss-to-lease to capture.
• Timing across the cycle, since leases signed at different points capture different market conditions, means a rent roll always reflects a blend of past markets rather than today's, naturally producing a gap when rents have risen.

Reading loss-to-lease on a rent roll

Loss-to-lease surfaces most often on a rent roll and on operating statements, where it bridges potential income to actual scheduled income. Reading those line items correctly is what turns the concept into a decision tool. The table below walks through the terms an owner encounters when tracing the figure from gross potential rent down to what the property collects.

Keeping loss-to-lease distinct from vacancy loss is essential. Loss-to-lease reflects occupied space priced below market, while vacancy loss reflects space that is not leased at all. Confusing the two distorts both the income picture and the assessment of how much upside a property genuinely holds.

Best practices for managing loss-to-lease

Managing loss-to-lease well begins with measuring it accurately and often. Owners who refresh their market rent assumptions regularly, using current comparables rather than stale figures, get an honest read on the gap and avoid either overstating upside or missing it entirely. A loss-to-lease figure is only as reliable as the market rent estimate behind it, so disciplined comparable analysis is the foundation.

From there, the work shifts to capture. Leasing teams that approach renewals with a clear view of where each lease sits relative to market can price increases with confidence, narrowing the gap at every opportunity while balancing the cost and risk of tenant turnover. Building meaningful escalations into new leases keeps fresh contracts from drifting below market over their term, which slows the accumulation of new loss-to-lease even as existing leases are reset.

Strong operators also stage their capture against the lease expiration schedule. Because a property cannot reset a lease until it rolls, the realistic pace of burning off loss-to-lease is governed by how the expirations are spread across the coming years. Aligning leasing strategy, renewal timing, and capital plans with that schedule turns embedded upside into a credible, time-bound plan rather than a vague aspiration. Treating the figure as a living management metric, reviewed alongside occupancy and net operating income, keeps the whole rent roll moving steadily toward its potential.

Frequently asked questions

Related terms