Weighted average lease term, or WALT, measures the average time remaining on a group of leases after weighting each lease by rent, area, or another stated measure. The calculation is useful only when its method is explicit. Investors should know the measurement date, weighting basis, lease endpoint, included population, and treatment of options, breaks, vacancies, and signed future leases before using WALT to judge income durability.
A single WALT figure summarizes lease duration. It does not measure tenant credit, rent collection, rollover cost, market rent, concentration, or the probability that a tenant will remain.
What Is Weighted Average Lease Term?
Weighted average lease term is the sum of each lease’s remaining term multiplied by its assigned weight, divided by the total weight. In commercial real estate, the weight is commonly contractual rent or occupied area. Some market participants call the metric weighted average unexpired lease term, or WAULT.
The basic formula is:
WALT = sum of each lease’s remaining term × its weight, divided by total weight.
The formula is simple, but there is no useful result without a defined convention. The Regional REIT glossary, for example, defines WAULT as the average remaining term to first break or expiry, weighted by contracted rental income, including rent-free periods, with specified exclusions. Another owner may use rentable area, expiration only, or annualized base rent. Those results can differ even when they describe the same property.
Public companies use the metric to describe portfolio duration. A May 2026 SEC-filed portfolio update reported 809 properties, 97% occupancy, and a 5.9-year weighted average remaining lease term. That disclosure becomes more informative when read with tenant concentration, investment-grade exposure, escalators, occupancy, and renewal activity reported in the same filing.
Four Decisions Define a WALT Calculation
1. Choose the weighting basis
Area-weighted WALT answers how long the occupied physical footprint is contracted. Rent-weighted WALT answers how long current contractual revenue is tied to leases. The two measures can diverge when smaller spaces carry higher rents per square foot, when older leases are below market, or when free-rent and stepped-rent periods affect the chosen rent definition.
State whether rent means current cash base rent, annualized contractual rent, straight-line rent, total occupancy cost, or another amount. Percentage rent, reimbursements, concessions, currency conversion, and scheduled steps also need consistent treatment.
2. Define the lease endpoint
A lease may have a contractual expiration, a tenant break right, a landlord termination right, and renewal options. WALT to expiration usually produces a longer result than WALT to the earliest exercisable break. Neither is automatically correct. The selected endpoint should reflect the question being answered and should be reported in the label.
Options generally require a separate judgment. Including an unexercised renewal can overstate committed duration. Excluding a renewal that is already binding can understate it. The source lease, amendments, notices, and tenant estoppel evidence should agree before an option changes the calculation.
3. Define the lease population
Identify whether the denominator includes occupied suites only, vacant area, month-to-month occupants, ground leases, residential units, development assets, signed leases that have not commenced, subleases, or leases classified as held for sale. Excluding vacancy may be reasonable for a lease-duration statistic, but the resulting WALT should never be presented as a measure of total-property income security.
Portfolio WALT also requires rules for joint ventures, acquisitions, dispositions, and assets under contract. A pro forma measure after a transaction should be labeled separately from the period-end measure.
4. Fix the measurement date and precision
Remaining term declines every day. Calculate from one stated date using actual contractual dates, then apply a consistent day-count method. Rounding each lease to whole years before weighting can distort a portfolio with many near-term expirations. Preserve the precise calculation and round only the reported result.
Owners and investors establishing lease analytics can work with Primior to connect lease evidence, rollover exposure, capital planning, and investment decisions alongside qualified legal, accounting, valuation, lending, property-management, and other advisers.
Weighted Average Lease Term Calculation Example
Assume a 100,000-square-foot property has four occupied tenants. Tenant A occupies 40,000 square feet, pays $800,000 of annual base rent, and has seven years remaining. Tenant B occupies 25,000 square feet, pays $1 million, and has four years remaining. Tenant C occupies 20,000 square feet, pays $1.1 million, and has two years remaining. Tenant D occupies 15,000 square feet, pays $900,000, and has one year remaining.
The area-weighted calculation is:
(40,000 × 7 + 25,000 × 4 + 20,000 × 2 + 15,000 × 1) ÷ 100,000 = 4.35 years.
The rent-weighted calculation is:
($800,000 × 7 + $1 million × 4 + $1.1 million × 2 + $900,000 × 1) ÷ $3.8 million = 3.34 years.
The rent-weighted result is about one year shorter because the leases producing more rent per square foot expire sooner. The area measure better describes physical rollover; the rent measure better describes contractual revenue rollover. Reporting only 4.35 years could conceal the earlier concentration of rent at risk.
This hypothetical assumes no breaks, options, vacancy, free rent, stepped rent, future commencements, or percentage rent. It does not predict renewals or property value.
Why a Long WALT Can Still Conceal Risk
A long WALT can support income visibility, but duration is not credit quality. A weak tenant with eight years remaining may be less dependable than a strong tenant with three. Review payment history, financial capacity, guaranties, security deposits, industry exposure, location dependence, and lease remedies.
Duration is also not economic quality. A long below-market lease can limit near-term income growth. A long above-market lease can create rollover risk if the exit valuation assumes the contract rent will persist. Expense caps, reimbursement terms, concessions, purchase options, termination rights, co-tenancy provisions, exclusives, expansion rights, and landlord obligations can materially change cash flow without changing WALT.
Concentration can disappear inside an average. A portfolio may report six years of WALT while one tenant provides 35% of rent and can terminate in two years. Primior’s seven-test rent roll framework shows why lease dates must be reconciled with cash collections, source documents, tenant concentration, rollover clusters, and capital requirements.
Capital needs matter because renewal and replacement are not free. Tenant improvements, leasing commissions, downtime, free rent, demolition, code work, and lender reserves can turn an apparently manageable expiration schedule into a funding problem. WALT should be paired with annual rent rollover, area rollover, expected retention, downtime assumptions, renewal probability, and replacement cost.
WALT Is Not the Same as the ASC 842 Lease Disclosure
The phrase weighted-average remaining lease term also appears in lessee financial statements. The FASB Topic 842 implementation guide illustrates separate weighted-average remaining terms for a lessee’s finance and operating leases. That accounting disclosure concerns the reporting entity’s lease liabilities and right-of-use assets. It is not automatically comparable with a landlord’s rent- or area-weighted property WALT.
When reviewing a company, fund, or sale-leaseback, identify which metric is being presented. A lessee may disclose the weighted-average term of its obligations while a property owner reports tenant lease duration. Both can be relevant, but their populations, weights, and economic questions differ.
How to Use WALT in Underwriting
Start with a lease-level schedule that records premises, area, current rent, commencement, expiration, breaks, options, guarantees, concessions, and amendments. Reconcile the schedule to executed documents, billing records, collections, general-ledger revenue, and property occupancy. Calculate both rent- and area-weighted WALT when the difference is material.
Then build a rollover table by year and tenant. Show annual base rent, occupied area, contractual rent changes, breaks, options, capital assumptions, and concentration. Stress a major nonrenewal, delayed backfill, lower replacement rent, and higher leasing cost. A published Healthpeak renewal disclosure illustrates how an early renewal can extend weighted average lease maturity while also changing base rent and escalators. Duration and economics should be evaluated together.
Record the metric in the investment memo with its definition, source date, calculation owner, supporting file, and exceptions. Primior’s real estate investment memo framework provides a structure for separating evidence, assumptions, sensitivities, unresolved issues, and approval conditions.
The OCC’s Commercial Real Estate Lending handbook addresses prudent analysis of income-producing property risk. Equity and debt investors have different positions, but both need lease data, property cash flow, valuation assumptions, and downside capacity to describe the same asset.
Use WALT as a Starting Point, Not a Conclusion
Weighted average lease term is most useful when it is reproducible and paired with the lease expiration schedule. State whether the measure is weighted by rent or area, whether it runs to break or expiry, which leases are included, and the exact measurement date. Then test tenant credit, concentration, market rent, renewal economics, capital needs, and downside cases.
Investors, owners, and sponsors seeking that discipline can work with Primior to evaluate lease duration, tenant exposure, cash flow, capitalization, and execution risk with independent legal, tax, accounting, appraisal, lending, property-management, and other professional advisers.
This article is provided for general informational purposes only and does not constitute investment, legal, tax, accounting, appraisal, lending, property-management, or other professional advice, an offer to sell, or a solicitation of an offer to buy any security or investment product. Lease terms, WALT conventions, renewal outcomes, costs, and valuation effects depend on the documents, property, tenants, market, transaction, and current facts. All investments involve risk, including possible loss of principal.
