What the Vacancy Rate Is and Why It Matters More Than It Seems

May 12, 2026 · 5 min read

In the presentation of any income-producing asset, the income figures shown always assume 100% occupancy. Reality rarely matches that scenario. The vacancy rate — the percentage of space or units without a tenant — is one of the most revealing indicators of the genuine quality of an asset and the sustainability of its cash flow.

What it actually measures

The vacancy rate expresses what proportion of the asset is not generating income at any given moment: Vacancy rate (%) = (Vacant space / Total space) × 100.

An office building of 2,000 sq m with 400 sq m unlet has a vacancy rate of 20%. If the average rent is €10/sq m/month, that vacancy represents €48,000 per year that the asset could be generating and is not.

How it affects asset value

In the valuation of income-producing assets, value is derived from the cash flow generated. High vacancy has a double negative effect: it reduces current income and introduces uncertainty about the asset’s ability to maintain future occupancy, which raises the discount rate a buyer demands. In practical terms: for the same asking price, an asset with 20% vacancy is structurally worth less than one at 100% occupancy. And if the buyer prices correctly, they should pay less.

Cyclical versus structural vacancy

Not all vacancy is the same. Cyclical vacancy occurs when space has previously been occupied, a tenant has recently departed, and there is genuine demand to re-let within a reasonable timeframe. It is temporary and, properly managed, can be an opportunity to improve lease terms. Structural vacancy, by contrast, arises when space has been empty for some time because something is making it difficult to let: a poorly configured floor plate, inadequate access, obsolete installations, oversupply in the local area, or above-market pricing. This type of vacancy does not resolve itself and requires either investment or a reset of expectations. Distinguishing between the two is fundamental to evaluating an asset correctly.

Questions to ask before buying a vacant asset

How long has the vacant space been empty? Six months is one thing; three years is another. Is there active demand in the area for that type of space? Why did the last tenant leave? The answer may reveal issues that do not appear on the floor plan. What cost and time would be required to bring the space to market condition? And does the price reflect the current situation, or is the seller pricing on future potential?

Vacancy as an opportunity

An asset with manageable vacancy — space that can be let with reasonable investment in a market with genuine demand — can be precisely where the value lies. If the purchase price reflects the current situation and the investor has the capacity to manage occupancy, the upside can be very significant. At INVARA, we look for assets with this lever: partial occupancy due to an owner’s inaction or lack of active management that, with reasonable intervention, can generate returns well above market.