Weighted Average Lease Term (WALT) Explained: How to Calculate It and Why It Matters

Weighted average lease term (WALT) is the average remaining term across all the leases in a property or portfolio, weighted by each lease's rent or area. It tells you, in a single number, how long the income is locked in before leases start expiring. A longer WALT means more contracted income and less near-term rollover risk. A shorter WALT means more leases roll soon, which is both a risk (vacancy and downtime) and an opportunity (re-pricing below-market rents up to market). Investors, asset managers, and lenders all read WALT as a quick gauge of income durability, and it comes straight out of the lease expiration dates you abstract from every lease.

What is weighted average lease term (WALT)?

Weighted average lease term is the average time left on the leases in a building or portfolio, with each lease weighted by its share of total rent or total leased area. Rather than treating a 10,000 square foot anchor and a 500 square foot kiosk as equal, the weighting gives the anchor far more influence on the number, because it drives far more of the income. WALT is usually expressed in years. You will also see it called WAULT (weighted average unexpired lease term) and WALE (weighted average lease expiry); they describe the same idea, with WALE more common in Australia and the UK and WALT more common in the US.

How do you calculate WALT?

To calculate WALT, multiply each lease's remaining term (in years) by its weighting (its share of total rent or total area), then add up the results. The formula is the sum of (remaining term times weight) across every lease. Here is a simple rent-weighted example for three tenants:

The portfolio WALT here is 6.1 years, even though the simple average of the three terms is 4.7 years. The anchor's large rent share pulls the weighted figure up. Two choices change the result: weighting by rent versus by area, and whether you measure to lease expiration or to the next tenant break or termination option. Be explicit about both, because a WALT to break can be materially shorter than a WALT to expiry when tenants hold early-termination rights.

What is a good WALT?

There is no single good number, because it depends on property type and strategy. As a rough guide, a WALT above 7 to 10 years signals very stable, long-dated income (common with single-tenant net lease and credit-tenant assets), 4 to 7 years is typical for healthy multi-tenant office and retail, and under 3 years means heavy near-term rollover that buyers and lenders will scrutinize. A short WALT is not automatically bad: for a value-add investor buying below-market rents, near-term rollover is the whole thesis, because each expiration is a chance to mark rent to market. What matters is whether the WALT matches the business plan.

What is the difference between WALT and WAULT or WALE?

WALT, WAULT, and WALE all measure the same thing: the rent or area weighted average of remaining lease term across a property or portfolio. WAULT spells out weighted average unexpired lease term, emphasizing that you count time still to run, not the original term. WALE, weighted average lease expiry, is the term used in Australian and UK markets. In US commercial real estate you will most often hear WALT. The only differences that matter in practice are the weighting basis (rent or area) and whether you measure to expiry or to the next break, so always confirm those when comparing one figure to another.

Why does WALT matter to investors and lenders?

WALT matters because it summarizes income risk in one number. For an investor or asset manager, a long WALT supports a lower cap rate and a higher value, since the income is contracted further out; a short WALT raises releasing risk and the cost of downtime and tenant improvements. For a lender, WALT signals whether the income covering the loan will still be in place at key points in the loan term: if a cluster of leases expires before the loan matures, the debt service coverage can fall right when refinancing is due. Lenders running that analysis on a collateral pool often pair lease data with AI loan underwriting software to size the loan against the lease maturity profile. For how lenders abstract leases for exactly this, see lease abstraction for lenders.

How does WALT affect property value?

WALT affects value through the cap rate and the perceived risk of the cash flow. All else equal, a property with longer, well-staggered lease terms trades at a tighter cap rate than an identical building with leases all expiring in the next two years, because the buyer is paying for contracted income rather than speculative re-leasing. WALT also shapes the underwriting of capital costs: a short WALT front-loads leasing commissions, tenant improvements, and downtime into the hold period, which a buyer subtracts from value. This is why asset managers actively manage WALT, blending and extending anchor leases, staggering expirations, and timing renewals, and why they need every expiration and option date abstracted from the leases to see the maturity wall clearly. Our lease abstraction for asset managers page covers that workflow, and as tenants roll and you re-lease space, tracking each new tenant's certificate of insurance keeps the risk file current.

How do you improve a property's WALT?

You improve WALT by extending the leases that drive the most income before they get short. Common moves are a blend-and-extend with an anchor (giving a modest rent concession in exchange for added years), exercising or negotiating renewal options early, and staggering new lease expirations so they do not all land in the same year. Each of these depends on knowing exactly when leases expire and what options exist, which is why the work starts with clean lease data. When you renew or extend, getting the amendment signed quickly with online document signing keeps the longer term locked in, and the new dates flow back into your rollover schedule.

Where the numbers come from: lease abstraction

WALT is only as accurate as the expiration dates behind it, and those dates live in the leases, often buried in amendments and option clauses rather than the original term sheet. Abstracting every lease into structured data, the commencement and expiration dates, renewal and extension options, and any early-termination or break rights, is what makes WALT trustworthy across a portfolio. AI lease abstraction does that first pass in minutes per lease and links every date back to its source clause, so the maturity wall you report is defensible. To run a whole portfolio at once, see bulk lease abstraction, to build the income side see how to build a rent roll from leases, and for the full tool, our lease abstraction software overview.

WALT is a small number that carries a lot of weight in a valuation, an investment committee memo, or a loan file. Get the lease dates right, be clear about whether you are weighting by rent or area and measuring to expiry or to break, and the metric becomes a fast, honest read on how durable a property's income really is.