Weighted Average Lease Expiry (WALE) is the single most-cited metric in commercial property valuation, and one of the most commonly misunderstood. A long WALE is usually quoted as a strength; a short WALE is usually quoted as a weakness. Both can be wrong. The right reading depends on which tenant the income is weighted to, what the option terms look like, and what the contractual reviews are.
This article covers what WALE measures, how it is calculated, and the underwriting questions that sit behind the headline number on a buyer-side commercial brief.
WALE is an average. Averages hide the shape of the income stream. A 9-year WALE asset can be a tenant-concentration single-name liability, and a 4-year WALE asset can be a diversified, renewing rent roll. The number is the start of the analysis, not the end.
How WALE is Calculated
WALE is the weighted average of the time remaining on each lease in the rent roll, weighted by either income or floor area. The two weightings produce different numbers, and they answer different questions.
Income-weighted WALE
For each tenancy, multiply the years remaining on the lease by the proportion of total income that tenancy contributes. Sum across all tenancies. This is the number quoted in valuation reports and the metric institutional buyers use.
Income-weighted WALE asks: of the dollars of rent flowing through this asset, what is the average remaining term?
Area-weighted WALE
The same calculation using floor area (typically Net Lettable Area, NLA, in office or Gross Lettable Area Retail, GLAR, in retail) as the weighting factor.
Area-weighted WALE asks: of the floor area in this asset, how long is it spoken for on average?
Why the two differ
A small anchor tenant on a 15-year lease alongside a number of short-lease retail tenancies will produce different income-weighted and area-weighted numbers. If the anchor pays a premium per square metre, the income-weighted WALE will be longer than the area-weighted WALE. If the anchor is on a peppercorn or below-market rent (common for legacy anchor tenancies in older retail), the relationship can invert.
1 The Tenant Concentration Question
A 12-year WALE on a single-tenant asset is a 12-year covenant bet. The income, the occupancy risk, and the residual value are all riding on one balance sheet. If that balance sheet is investment-grade national, the bet is low-risk. If it is a single private operator, the same headline WALE represents a materially different risk profile.
The buyer-side question is not just how long the WALE is, but what the income-weighted top three tenants account for. A multi-tenant asset with a 7-year WALE where the top tenant accounts for 18% of income is a different risk to a multi-tenant asset with the same 7-year WALE where the top tenant accounts for 62%.
2 Options to Renew
Most commercial leases in Australia include one or more options to renew, exercisable by the tenant on stated notice. The option periods are not included in WALE because they are at the tenant's discretion, not the landlord's.
For a buyer, the option terms matter for three reasons:
- Exercise probability. A tenant in a well-located, well-fitted space will usually exercise. A tenant in a marginal location with low utilisation will not. The option is more valuable in some contexts than others.
- Renewal rent mechanism. CPI plus a fixed minimum, market review with a cap, or a hard reset to market. The mechanism determines what the renewal rent will be if the option is exercised.
- Notice period and conditions. A six-month notice on a five-year option is different to a 30-day notice on a three-year option. Short notice favours the tenant; long notice favours the landlord.
3 Rent Review Mechanisms
WALE tells you how long the tenant is locked in. The rent review tells you what the rent will be over that lock-in period. Three common structures:
Fixed annual increases
3.5% or 4% fixed each year. Predictable, but if inflation runs above the fixed rate, the rent goes backwards in real terms. Common in pre-2022 leases.
CPI plus a fixed minimum
The greater of CPI or a stated minimum (typically 2% or 3%). Provides downside protection against deflation, with upside in high-inflation periods. Common in post-2022 leases.
Market review
Periodic resets to market (typically at option exercise, or at the midpoint of a long-dated lease). The market review can produce a substantial jump or fall; cap and collar provisions limit the move.
4 Make Good and Capex Liability
At lease end, the tenant is typically required to "make good" the premises to the contractual condition. The standard varies: painted shell, original condition, removal of fit-out, or contractual make-good cap. For a buyer, the make-good obligation is part of the residual value, but it is the next landlord's value, not yours.
Capex liability is separate. Roofing, HVAC, structure, and external works are typically the landlord's responsibility. A long WALE with a tenant on a fully-recoverable outgoings basis still leaves the landlord exposed to capital works obligations.
5 The WALE-Yield Trade-off
Long-WALE assets price at compressed yields because the income stream is contractually de-risked. A 10-year WALE national-covenant single-tenant asset can trade 100 to 200 basis points tighter than a short-WALE multi-tenant equivalent in the same submarket.
For a yield-led buyer, the question is whether the WALE premium is a value buy or an income-stream illusion. A long-WALE single-tenant asset is a long-dated bond with property characteristics; if the covenant fails before lease end, the residual value is the building, not the income.
When long WALE is worth it
- Investment-grade national or government tenant.
- Triple net lease with most outgoings recovered.
- Building fit for purpose without major capex over the lease term.
- Lease structured to provide real rent growth (CPI plus minimum, or fixed at or above expected inflation).
When short WALE is worth it
- Asset is priced below replacement cost on a vacant-possession basis.
- Submarket vacancy is structurally low and re-leasing is straightforward.
- Existing rent is below market and renewal will reset upward.
- Buyer has a redevelopment thesis that values vacant possession.
6 Practical WALE Tests on a Brief
When we run WALE-weighted income modelling on a brief, we ask seven questions:
- What is the income-weighted WALE, and how does it compare to area-weighted?
- What is the top-three tenant income concentration?
- What is each tenant's covenant strength?
- What are the option terms and the probability-weighted exercise outcome?
- What is the rent review mechanism, and what does it imply for real rent growth?
- What is the make-good and capex liability over the lease term?
- What does the asset look like on a vacant-possession scenario at WALE expiry?
The headline WALE answers none of these directly. The lease abstract and tenant covenant work answer all of them.
Frequently Asked Questions
Is a longer WALE always better?
No. A longer WALE on a weak covenant or a below-market rent is worse than a shorter WALE on a strong covenant and a market rent that will reset upward at renewal.
Why do options not count toward WALE?
Because options are at the tenant's discretion. A WALE that included unexercised options would overstate the contractually committed income stream.
What is a "weighted" residual term?
The same calculation as WALE, applied to the residual term remaining on each lease (years left as of the calculation date), weighted by income or area. It is what most market participants mean when they say WALE.
How does WALE affect bank lending?
Senior lenders typically prefer longer WALE because it underpins debt service. Loan-to-value ratios, interest cover ratios, and bank-imposed covenants tend to be more favourable on long-WALE assets with strong tenant covenants.