Loss to Lease (LTL): What It Means, the Formula and How to Calculate It

Loss to lease sounds like money that walked out the door. It isn't. Nothing was spent, and nothing was lost.

The short version: loss to lease is rent you haven't caught up to yet, and it's only as real as the market rent you measure it against.

Quick Answer Loss to lease (LTL) is the difference between a unit's current market rent and the rent the resident actually pays under their lease. The formula is Loss to Lease = Market Rent − Lease Rent, added up across all occupied units. To express it as a percentage, divide by total market rent. For example, if market rent is $1,500 and a resident pays $1,440, that unit has $60 a month of loss to lease. When the lease rent is above market, the gap is called gain to lease.

What Is Loss to Lease?

Loss to lease is the gap between what a unit would rent for today and what the current resident pays under their lease. It only applies to occupied units.

It exists because of timing. A lease locks the rent for its term, usually 12 months, while market rent moves every time the property updates its pricing. Any lease signed before the latest increase sits below market until it renews or turns.

That's why it's better to think of loss to lease as future opportunity: rent the property can capture as leases come up for renewal.

Even lenders think the name is misleading. Freddie Mac's multifamily appraisal guidance says "Loss-to-lease is a poor name for this concept" and suggests "Rent Roll Differential" instead. For a stabilized property, the same guidance tells appraisers to model income from the existing rent roll, with vacant units at market rent, rather than assuming 100% market rents.

For the site team, that's the useful way to see it. Loss to lease is just your rent roll compared with market.

Loss to Lease vs Gain to Lease

Gain to lease is the same gap running the other way. The resident pays more than the unit's current market rent.

It shows up when market rents fall, when asking rents get cut to fill units, or when leases signed at a seasonal peak run into a slower season. It's sometimes called negative loss to lease.

Many operating statements combine both into a single "gain/loss to lease" line. The number you see is the net of every lease above and below market.

The Loss to Lease Formula

Start with one unit:

Loss to Lease (per unit, monthly) = Market Rent − Lease Rent

Then add it up across the property:

Total Loss to Lease = Sum of (Market Rent − Lease Rent) for every occupied unit

And, if you want a percentage:

Loss to Lease % = Total Loss to Lease ÷ Total Market Rent for all units

A negative result is gain to lease.

For an annual figure, multiply the monthly total by 12 for a snapshot. For an actual year, add up the 12 monthly figures, because loss to lease changes every time a lease renews or market rent moves.

Definitions vary on the denominator. This article divides by total market rent for all units, the same base as the top line of the operating statement, so the percentage reads as a share of the top line.

Some calculators divide by in-place rent instead, which gives a slightly higher number. Either works, as long as you use the same one for every property you compare.

How to Calculate Loss to Lease: A Multifamily Example

Here's an illustrative 120-unit property with an average market rent of $1,500 a month. 114 units are leased and 6 are vacant. The numbers are round on purpose.

Illustrative example. Not a benchmark for any market.

1. Pull market rent and lease rent for every occupied unit from the rent roll.
2. Subtract lease rent from market rent for each unit.
3. Add up the gaps. $2,000 + $1,200 + $400 = $3,600 a month.
4. Annualize the snapshot. $3,600 × 12 = $43,200 a year, if nothing changes.
5. Turn it into a percentage. Total market rent is $1,500 × 120 = $180,000 a month. $3,600 ÷ $180,000 = 2.0%.

Divide by in-place rent instead ($167,400 a month across the 114 leases) and you get about 2.2%. Same property, same leases, different denominator.

The six empty units don't count toward loss to lease. Their missing rent, $9,000 a month at market, is vacancy loss.

What Happens When You Raise Market Rent

Now say the property raises market rent by $30, to $1,530, and not a single lease changes.

• The market rent line goes up $3,600 (120 units × $30).
• Loss to lease goes up $3,420 (114 occupied units × $30), to $7,020 a month, or 3.8%.
• Vacancy loss goes up $180 (6 vacant units × $30).

Rent on current leases stays exactly where it was: $167,400.

Loss to lease nearly doubled overnight, and nobody on-site did anything wrong. When LTL "spikes" on a monthly report, check whether someone updated market rents before you check anything else.

What Happens When the Market Drops

Run it the other way. Market rent falls $50, to $1,450.

• The 40 leases at $1,500 now sit $50 above market: $2,000 of gain to lease.
• The 50 leases at $1,460 sit $10 above market: $500 of gain to lease.
• The 20 leases at $1,440 and the 4 at $1,400 are still below market: $200 + $200 = $400 of loss to lease.

Net, the property now shows $2,100 a month of gain to lease, or −1.2% of the $174,000 market rent line.

Rent collected still hasn't moved. But 90 of the 114 leases are now above market, and each of those renewals is a conversation about why the rent should stay where it is.

Same leases, three market rents. Illustrative.

Where Loss to Lease Sits on the Operating Statement

Loss to lease is the first deduction in the revenue section, ahead of vacancy, concessions and bad debt. Statements label the lines around it differently, so it's worth knowing both layouts.

Layout 1: loss to lease comes before gross potential rent

Market Rent
− Loss to Lease
= Gross Potential Rent
− Vacancy Loss
− Concessions
− Bad Debt
− Non-Revenue Units
= Net Rental Income

Layout 2: gross potential rent is the market-rent line

Gross Potential Rent (at market)
− Loss to Lease
− Vacancy Loss
− Concessions
− Bad Debt
− Non-Revenue Units
= Net Rental Income

In the first layout, gross potential rent already has loss to lease taken out. In the second, gross potential rent is every unit at market, and loss to lease comes right after it.

The math is identical. Only the labels move.

That matters when you compare properties or answer an owner's question. Before you put one property's gross potential rent next to another's, check which layout each report uses.

Either way, loss to lease comes straight out of rental income, so it flows all the way down the statement. We walk through how loss to lease flows into NOI in a separate post.

Loss to Lease vs Vacancy vs Concessions

These lines sit next to each other on the statement and get mixed up all the time. Here's how they differ:

The one that causes the most trouble is concessions. If a property gives a month free and records it by lowering the lease rent, the concession disappears and loss to lease goes up instead. Book concessions on their own line and keep lease rent at the contract rate, so each number tells you what it's supposed to.

Together, these lines explain why a property can be 95% occupied and still collect well under 95% of market rent. We break down physical, average and economic occupancy in our fundamentals post.

What Moves Loss to Lease On-Site

Loss to lease is set by pricing decisions, one lease at a time. These are the levers the site team holds:

• Renewal pricing. Every renewal either closes some of the gap or carries it forward another year. If you start renewal conversations early, you have time to price each one deliberately.
• New-lease pricing. A new lease signed at market adds no loss to lease. A new lease signed below market starts a fresh gap.
• Market rent updates. Loss to lease is measured against whatever market rent is in the system. If market rents are stale, the number is wrong in one direction or the other.
• Concession coding. Keep concessions on their own line, as above.
• Expiration timing. Loss to lease can only be captured when a lease expires or turns, so the expiration schedule decides when the money can show up.

Don't Chase It to Zero

Closing the gap isn't free. Take the resident paying $1,440 against a $1,500 market rent. That's $60 a month, or $720 a year.

Now price the alternative. If pushing the full $60 means the resident moves out, the property pays for the turn. With an illustrative $1,000 make-ready and 20 vacant days at about $49.32 a day ($1,500 × 12 ÷ 365), that's roughly $1,986.

One move-out costs about 2.8 years of the $60 increase. Sometimes the right call is to close part of the gap at this renewal and the rest at the next one.

Local rules can also set the pace. The City of Alameda summarizes one rule in California's Tenant Protection Act (AB 1482) this way: "Caps annual rent increases at 5% plus the local Consumer Price Index (CPI), or 10%, whichever is lower." Some units are exempt.

Under a cap like that, a long-term resident far below market can take several renewals to reach it. Rent increase limits, notice periods and exemptions vary by state and city, so check the rules for each property before you set renewal increases.

How Loss to Lease Shows Up in the Budget and the Owner Conversation

In the budget, loss to lease shouldn't be a percentage carried over from last year. It should come from the rent roll.

For each month of the budget year, you need four inputs:

1. Budgeted market rent by unit type, month by month.
2. Which leases expire that month.
3. What share of residents you expect to renew, and at what rent.
4. What new leases will sign at when units turn.

Leases that renew move to the renewal rent. Units that turn re-lease at or near market. Everything else carries its current gap.

Add it up and you have budgeted loss to lease for that month, with a reason behind every dollar. It's the same rent-roll-first approach we use for building the revenue side of a budget.

Two things trip budgets up here. First, loss to lease is captured lease by lease as expirations come up, not on January 1. Second, how much gap there is to capture depends on where market rents go.

CBRE's Q2 2026 multifamily figures show how little room the national market is giving right now: "Average monthly rent increased by 0.5% year-over-year and 1.5% quarter-over-quarter in Q2 to $2,257." When rent growth is that flat, a budget that assumes market rents keep climbing and every renewal closes the gap deserves a second look. Your own submarket data should drive the market rent assumption, not a national number.

Then comes the owner. Owners and buyers tend to read loss to lease as upside, and the question you'll get is some version of "how much of that can we capture, and when?"

Have the answer ready in three parts: how much of the gap sits on leases expiring in the next 12 months, what renewal increases you're planning, and what retention risk comes with them. That turns loss to lease from a line on the report into a plan.

In Vizibly, revenue is planned from the rent roll and lease expirations pulled from the property management system, so budgeted loss to lease starts from actual leases instead of a retyped spreadsheet.

Common Loss to Lease Mistakes

• Reacting to a market rent update. A jump in loss to lease right after market rents change isn't a leasing problem, and a drop isn't a win. Check what moved before you explain it.
• Netting concessions into lease rent. It hides the cost of the concession and inflates loss to lease.
• Budgeting all of it to burn off in year one. Only leases that expire can be repriced, and not every resident will renew at market.
• Comparing percentages that aren't built the same way. A 2.0% at one property and a 2.2% at another might be the same rent roll with different denominators.
• Letting market rents go stale. If market rent hasn't been updated in months, loss to lease is measuring against a number nobody would lease at.
• Chasing it to zero at every renewal. Turnover costs can wipe out years of the increase you were chasing.

FAQ

Is loss to lease an expense?

No. It's a deduction in the revenue section of the operating statement, and no cash leaves the property, but it still lowers rental income and therefore NOI.

Is a negative loss to lease good?

A negative loss to lease (gain to lease) means residents pay more than current market rent, which helps income today, but those renewals may have to come down to market or those residents may leave, so treat it as a retention risk in the budget.

What is a normal loss to lease percentage?

There's no single benchmark, because loss to lease depends on how fast market rents are moving and how often the property updates them, so track your own trend and only compare properties that calculate it the same way.

Is loss to lease the same as mark-to-market?

They describe the same gap from two directions: loss to lease measures how far current leases sit below market, and mark-to-market is the work of bringing them up to market as leases renew or turn.

Does loss to lease affect property value?

It can, because loss to lease lowers rental income and NOI, and value is often estimated from NOI, which is why we explain how NOI turns into property value separately.

The Punchline

Loss to lease is your rent roll measured against market. Nothing more.

Market rent sets it. Renewals close it. Expirations time it. Retention decides how fast.

Want your site team to calculate it with confidence before the budget meeting? Financials 101 for Property Managers includes Loss to Lease and Mark-to-Market Opportunity calculators built for property managers.

Sources

• Freddie Mac Multifamily, "Modeling Multifamily Potential Rental Income: Using Actual Rents versus Applying 100% Market Rents with Loss-to-Lease," June 2022. https://mf.freddiemac.com/docs/appraisal_guidance_model_potential_gross_income.pdf
• CBRE, "Q2 2026 U.S. Multifamily Figures," July 29, 2026. https://www.cbre.com/insights/figures/q2-2026-us-multifamily-figures
• City of Alameda Rent Program, "AB 1482 - California Tenant Protection Act" (FAQ), accessed October 23, 2026. https://www.alamedaca.gov/Departments/Rent-Program/Frequently-Asked-Questions/FAQ-AB-1482-California-Tenant-Protection-Act