Weighted Average Remaining Lease Term
Weighted average remaining lease term, usually shortened to WALT, is the average time left before leases expire, with each lease weighted by a stated measure such as annualized base rent or leased area. The arithmetic multiplies each lease’s remaining years by its weight, adds the products, and divides by the total weight. The result is only as meaningful as its weighting basis and its treatment of renewal options, so a bare WALT figure with neither stated cannot be compared with another.
How the weights decide what a lease term average measures
Every WALT is a weighted mean of remaining years. The weight is the whole story. With annualized base rent as the weight, a lease paying twice the rent counts twice as much, and the result describes how long the rent stream is contractually in place. With leased area as the weight, a lease covering twice the space counts twice as much, and the result describes how long the space is contractually committed.
Those two answers diverge whenever rent per square foot varies across the leases. A large, low-rent space expiring soon pulls an area-weighted figure down hard and an income-weighted figure down only a little. A small, high-rent space with a long term does the reverse.
A large net lease portfolio can report an average of 8.8 years excluding tenant options to extend. That sentence contains the three pieces a reader needs: the average, the population, and the option rule.
The figure is a measure of contractual timeline. It says nothing about whether tenants renew, what rent resets to, or how long space sits empty after expiration.
Why option treatment moves the number
A lease has a current contractual expiration and, often, one or more tenant options that could push it out. Counting only the current expiration measures commitment the tenant cannot walk away from. Counting options requires a rule about which options are included and whether each is assumed to be exercised, and every assumed exercise lengthens that lease’s term in the calculation.
The same logic applies to expiration schedules. A schedule built on the assumption of no renewal options places every lease in its contractual expiration year, which is the cleanest view of when income can first be interrupted.
Two figures built on different option rules cannot be set side by side. One may describe commitment and the other a hoped-for outcome.
Reading WALT beside the expiration schedule
An average hides shape. A large portfolio can carry 2,309 leases in an expiration table, with annualized contractual base rent and leased area sorted into the years in which they roll. The table shows how much income expires in any single year, which an average cannot show.
Two portfolios with the same WALT can differ sharply in near-term exposure. One may hold a cluster of leases expiring soon, offset by a few very long leases. The other may hold leases spread evenly across the years. The long leases lift the average in both cases.
Occupancy is a separate number. A portfolio reported at 99.8% leased occupancy with a 8.4 year WALT tells the reader that nearly every space is leased and that the leased spaces average 8.4 years of remaining term. Vacant space carries no lease and therefore no term, so a high WALT can sit beside meaningful vacancy.
Acquisition WALT and portfolio WALT run on different clocks
A newly signed lease generally has most of its term still ahead of it, while a newly acquired lease may be near expiration. Retail net lease acquisitions across 40 states can carry a weighted average remaining term of about 11.3 years. A group of 282 acquisitions plus 21 completed developments, 303 properties in total, can be reported at about 11.4 years. The small gap reflects different populations, since the second group adds development properties.
The owned portfolio is a different population. One portfolio reported 8.4 years, and another reported 8.8 years excluding options. Each is a stock of leases of varying ages, and the stock is lower than the acquisition cohorts above.
The arithmetic explains the direction. With no new leases and no expirations or disposals, every year that passes removes one year from each lease’s remaining term, so the portfolio figure falls by one year. It falls with the passage of time and stays level or rises only when acquisitions, renewals or extensions add term, or when disposals and expirations remove shorter leases from the average. Comparing a purchase WALT with a stabilized portfolio WALT therefore compares a fresh cohort with an aged stock.
“These properties are located in 40 states and had a weighted average remaining lease term of approximately 11.3 years.”
Worked example: rent-weighted and area-weighted WALT for a three-tenant hypothetical center
Take a hypothetical center of 100,000 square feet with three leases. Lease A covers 50,000 square feet, pays $600,000 a year and has 2 years remaining. Lease B covers 30,000 square feet, pays $450,000 and has 8 years remaining. Lease C covers 20,000 square feet, pays $500,000 and has 12 years remaining. Total annual rent is $1,550,000 ($600,000 plus $450,000 plus $500,000).
Rent-weighted, base case. Lease A contributes 1,200,000 rent-years (2 multiplied by 600,000). Lease B contributes 3,600,000 (8 multiplied by 450,000). Lease C contributes 6,000,000 (12 multiplied by 500,000). The sum is 10,800,000 rent-years, and dividing by $1,550,000 gives a rent-weighted WALT of 6.97 years.
Area-weighted, base case. Lease A contributes 100,000 square-foot-years (2 multiplied by 50,000), Lease B 240,000 (8 multiplied by 30,000), and Lease C 240,000 (12 multiplied by 20,000). The sum is 580,000, and dividing by 100,000 square feet gives 5.8 years. The area-weighted figure is lower because Lease A holds half the space and expires first, while its rent share is smaller.
Alternative case. Lease A renews for 5 years from today, and nothing else changes. Its rent contribution becomes 3,000,000 (5 multiplied by 600,000). The sum becomes 12,600,000 (3,000,000 plus 3,600,000 plus 6,000,000), and the rent-weighted WALT is 8.13 years (12,600,000 divided by 1,550,000). That is 1.16 years higher than the base case. The area-weighted sum becomes 730,000 (250,000 plus 240,000 plus 240,000), for 7.3 years.
The same two bases and the same population are used in both cases. A WALT computed with options excluded would have stayed at 6.97 until the renewal was actually signed.
Common mistakes in building and comparing WALT
Leaving the weighting basis unstated is the most frequent source of confusion. In the worked example, the same three leases produce 6.97 years on rent and 5.8 years on area. Both are correct, and they answer different questions, so comparing one owner’s rent-weighted figure with another’s area-weighted figure compares unlike things.
A simple average of lease terms gives each lease equal influence. In the example it would give 7.33 years (2 plus 8 plus 12, divided by 3), which overstates the rent-weighted result because the shortest lease carries the largest rent. Equal weighting ignores how much income or space each term controls.
Mixing option treatments between periods creates false trends. A figure that excludes options in one report and includes unexercised options in the next can appear to move even when no lease has changed.
Treating the average as a maturity profile hides concentration. The expiration table is the place where a year with a large share of rent rolling becomes visible.
Confusing lease WALT with debt maturity is a related error. A debt table can show a weighted average remaining maturity of 9 years at a 3.0% weighted average interest rate. The arithmetic is the same, with principal as the weight, but it describes the liabilities and sits on a separate clock from the lease income that services them.
Questions that make a WALT figure usable
Is the weight annualized base rent, leased area, or another stated measure? The denominator decides which leases dominate the result.
Are tenant renewal options excluded or counted under a stated rule? The option rule sets the expiration date used for each lease.
Is every remaining term measured from the same as-of date? A shared reference date keeps terms comparable across leases and across reports.
Does the population include vacant space, ground leases or month-to-month tenancies? Each of these changes what the average describes.
Is the expiration schedule available next to the average? The schedule shows how much rent or space expires in each year.
Which rent is the weight: current base rent, or rent after scheduled increases? A different rent measure changes the proportions among the leases.
Does the figure describe an acquisition cohort or the stabilized owned portfolio? A fresh cohort starts with more remaining term than an aged stock.
How much of the income sits in the few longest leases? A small number of long leases can lift an average that the rest of the rent roll does not support.