What Is a WALE and Why It Matters for Commercial Buyers

WALE stands for weighted average lease expiry, and it's one of the first figures quoted in almost any commercial property listing with existing tenants. In simple terms, it measures how long, on average, the income from a property is secured under current leases — weighted by the size of each tenancy, usually by rental income or floor area, rather than a simple average of lease terms.

How WALE is calculated

Each tenant's remaining lease term is multiplied by their share of total rental income (or occasionally floor area), and those figures are summed across all tenancies. A property with one large, well-anchored tenant on a long lease and several smaller tenants on short leases will show a WALE skewed heavily towards the anchor tenant's term, because that tenant's income weighting dominates the calculation.

• By income: weights each lease by its share of total passing rent
• By area: weights each lease by its share of total leasable floor space
• Income-weighted WALE is more commonly quoted and more relevant to income risk

Why buyers pay attention to it

A longer WALE generally signals more secure, predictable income and is typically associated with lower risk and, correspondingly, a lower yield (higher price) for a comparable asset. A short WALE signals more near-term leasing risk — vacancy, re-leasing costs, incentives to attract new tenants — but can also represent opportunity if a buyer believes they can re-lease at a higher market rent than the passing rent reflects.

What WALE doesn't tell you

A long WALE is only as good as the tenant behind it. WALE says nothing about tenant covenant strength, the likelihood of a tenant exercising a break clause, or whether the passing rent is above or below current market rent. A property with an impressive ten-year WALE anchored by a financially distressed tenant carries very different risk to one anchored by a strong, well-capitalised national tenant on the same term.

Treat WALE as a starting point, not a conclusion. A long WALE with a weak tenant can be riskier than a shorter WALE with a strong one and clear re-leasing prospects.

Reading WALE alongside other factors

Sophisticated buyers look at WALE together with lease expiry profile (whether expiries are staggered or concentrated in one year), tenant covenant quality, rent reviews and options, and the gap between passing rent and market rent. A staggered expiry profile across several tenants generally reduces risk compared with several leases expiring simultaneously, even if the headline WALE figure looks similar.

WALE is a useful, quick shorthand for income security, and it's reasonable that it gets quoted prominently in every commercial listing. The mistake is treating it as a complete risk assessment rather than one input into a broader view of the tenancy schedule and the quality of income behind it.