What is WALE (weighted average lease expiry) and why does it matter?
WALE, weighted average lease expiry, is the average unexpired lease term across a portfolio, weighted by income (or sometimes floor area) and expressed in years. It is a headline measure of income security: a longer WALE means contracted income runs further into the future, and investors and REITs watch it as a proxy for income durability. But WALE has a limit most explainers miss: it measures only scheduled expiry, not the risk a tenant departs or fails mid-term, so a long WALE on weak covenants is fragile. Scayled adds the unscheduled-risk dimension WALE cannot see, monitoring tenants for the events that empty units before their lease expiry.
- What WALE is and how it is calculated
- Why investors and REITs watch WALE
- The nuance most explainers miss: WALE measures schedule, not risk
- How to manage WALE for real
What WALE is and how it is calculated
WALE measures how long, on average, the income from a portfolio is contracted to continue before leases expire. It is the weighted average of the unexpired term of every lease, expressed in years. The weighting is what makes it meaningful: rather than treating a tiny unit and a major distribution centre as equal, WALE weights each lease by its contribution, usually gross income, sometimes net lettable area. Income-weighted WALE is the more common and more useful version for funds, because it answers the question investors care about: how long is the money contracted for.
A simple illustration: a portfolio with one large tenant on twelve years unexpired contributing most of the income, and several small tenants on two years each, will show a WALE close to the large tenant's term, because the income weighting pulls the average toward the dominant lease. The same portfolio weighted by area might produce a different figure if the small tenants occupy more floor space than their rent implies. Always know which basis is being quoted, because income-weighted and area-weighted WALE can diverge materially and they answer different questions.
WALE is usually quoted to a lease expiry, but funds also track it to first break, the WALE assuming every tenant exercises its earliest break option. WALE to break is the more conservative figure and often the more honest one, because a break clause is a tenant's option to leave early, and a prudent manager assumes the breaks that hurt will be taken. The gap between WALE to expiry and WALE to break is itself a useful read on how much of the headline income security is genuinely contracted versus optional.
Why investors and REITs watch WALE
WALE is one of the first metrics an investor looks at because it proxies income security in a single number. A long WALE signals that the portfolio's income is contracted well into the future, so there is little near-term re-leasing risk and the cash flows underwriting distributions and debt service look stable. A short WALE signals the opposite: a wave of expiries approaching, with the income beyond them dependent on renewals and re-lettings that are not yet secured. For a REIT, WALE is a headline figure in every results presentation precisely because the market reads it as a measure of income durability.
WALE also matters to lenders and to valuation. A longer WALE supports more comfortable financing terms, because the contracted income covers the loan term with margin to spare, and it supports a keener yield on exit, because buyers pay more for income that does not need to be re-secured soon. Two otherwise similar industrial portfolios can trade at different yields largely on the strength of their WALE. Managing WALE is therefore not housekeeping; it is managing a lever on both the cost of debt and the value of the assets.
For an industrial fund specifically, WALE interacts with the sector's leasing dynamics. Big-box logistics often lets on long leases, which can produce a strong headline WALE, while multi-let industrial estates turn over faster on shorter terms. A blended portfolio's WALE hides that mix, so funds watch not just the single number but its distribution: how expiries are staggered across years, and whether the income is concentrated in a few long leases or spread across many short ones.
The nuance most explainers miss: WALE measures schedule, not risk
Here is what most WALE explainers leave out: WALE only measures scheduled expiry. It tells you when leases are contracted to end, and nothing about the risk that a tenant departs or fails before that scheduled date. WALE treats every year of unexpired term as equally secure, when in reality a tenant can hand back a unit, enter administration, or be consolidated out of existence years before its lease expiry. The metric is blind to every unscheduled departure, and unscheduled departures are where the painful voids come from.
This means a long WALE can actively mask risk. Consider a portfolio with a headline WALE of nine years that looks bulletproof on paper, where much of that term sits with a single 3PL whose covenant is weak and whose anchor retail contract has just been lost. The lease still has years to run, so WALE shows the income as secure, but the tenant may not survive to its expiry, and if it goes, the unit is empty regardless of what the lease said. A long WALE built on weak covenants is fragile in exactly the way the number is designed not to show.
The deeper point is that WALE and covenant strength are different axes, and income security needs both. A long WALE on strong covenants is genuinely secure income. A long WALE on weak covenants is a long contract with a party that may not keep it. Reading WALE without reading covenant trajectory, and without watching for the unscheduled events that empty units, gives a false sense of security. The number is necessary but nowhere near sufficient.
How to manage WALE for real
Managing WALE genuinely, rather than just reporting it, means working three levers. The first is regearing: extending leases with tenants you want to keep before they expire, which lengthens WALE while locking in income and, where the market allows, capturing reversion. A well-timed regear with a strong covenant tenant improves WALE and income security at once. The second is expiry staggering: structuring lease events so expiries are spread across years rather than clustered, so the portfolio never faces a single year where a large share of income comes up for renewal at once.
The third lever is the one WALE itself cannot see, and the one that separates real income management from metric management: monitoring covenant strength and unscheduled departure risk across the rent roll. Extending a lease only protects income if the tenant survives to honour it, so the regear and staggering decisions should be informed by which covenants are strengthening and which are deteriorating. A fund that manages only the scheduled number, while ignoring the tenant-level risk underneath it, can show an improving WALE right up to the moment a key tenant departs mid-term and the headline figure proves hollow.
Scayled adds precisely the dimension WALE omits. It monitors every tenant in the portfolio and the surrounding submarket for the operational signals that precede an unscheduled departure, contract losses, M&A, profit warnings, footprint cuts, scores each tenancy for departure risk with an action window, and refreshes the whole portfolio fortnightly. So alongside the scheduled WALE from your lease data, you get a live read on which tenancies are unlikely to reach their expiry intact, and the verified replacement demand for any unit at risk. Scayled does not replace ARGUS, Yardi or VTS; it fills the unscheduled-risk gap they share. Access is by request. Request access and Scayled works your first at-risk unit free, so you can see what your WALE is really worth on your own portfolio before committing.
Fill your first vacancy free
Request access and Scayled monitors every tenant in your submarket for movement signals, then identifies verified replacement tenants for your first vacancy at no cost. See the value on your own portfolio before you pay anything.
Fill Your First Vacancy Free →