Lease & Income Risk
When 100% Occupancy Becomes a Risk
Occupancy is not the same thing as durable income.
The question
A rent roll that shows every suite occupied is easy to read as a vote of confidence. The property is leased. The income is in place. The vacancy line is zero.
The underwriting question is narrower: how much of that occupancy is likely to continue, on comparable terms, after the next round of expirations, capital, and tenant decisions?
What looks obvious
Vacancy is visible. Empty suites photograph poorly, produce no rent, and invite a simple conclusion that a fully occupied property is safer than one that is not.
That comparison can be true. It can also be reversed. Current occupancy answers what is leased today. It does not answer whether the income is durable.
Two different facts
Keep the distinction explicit. One can be observed from a current rent roll. The other has to be underwritten.
Current occupancy
- What it measures
- What is occupied today
- What it does not measure
- Whether that occupancy should be expected to continue
Income durability
- What it measures
- How likely the current income stream is to continue
- What it depends on
- Leases, tenants, capital, and replacement cost — not the occupancy percentage alone
What full occupancy can hide
None of the following is automatically disqualifying. Each can turn a 100% occupied rent roll into a forward-risk problem:
- Lease expiration concentration. Several leases ending in the same period create a single window in which occupancy can change quickly.
- Multiple tenants rolling in the same year. The issue is not only how many leases expire, but whether the landlord must re-lease, renew, or reposition several spaces at once.
- Below-market rents. Occupancy can look stable because tenants are bargains. Renewal or replacement may require a different rent, different concessions, or both.
- Above-market rents. Occupancy can also look strong because a tenant is overpaying. That income may not survive a renewal, a default, or a replacement tenant.
- Tenant credit. A signed lease is not the same as a tenant who can perform it.
- Payment history. Current occupancy does not disclose late payments, partial payments, or informal accommodations.
- Options and renewal rights. Control over term can sit with the tenant. Occupancy today may be occupancy the tenant can extend, or occupancy the tenant can leave.
- Termination rights. Early-exit provisions can make a full rent roll more fragile than it appears.
- Tenant-improvement and leasing-commission exposure. Replacing a tenant has a cost. That cost belongs in the durability analysis even if it does not appear in the current month's NOI.
- Deferred maintenance. A fully occupied building with postponed roof, HVAC, or suite condition can require capital just to keep the current tenants in place.
- Rollover downtime. Even a successful re-leasing plan can include months of vacancy. 100% occupancy does not include that gap until it happens.
- Dependence on one major tenant. A high occupancy percentage can still be a concentrated income stream.
- Lease structure. Gross, modified gross, and net leases allocate expenses differently. Occupancy does not say who pays the next insurance or tax increase.
- Whether current occupancy is economically sustainable. If the property can remain full only by under-maintaining, under-pricing, or ignoring reserves, the occupancy rate is describing a temporary condition.
An illustrative comparison
Two hypothetical multi-tenant conditions. Neither is a real building. The comparison is deliberately simple: both could be described as occupied commercial property. Only one occupancy rate looks perfect.
| Item | Condition A | Condition B |
|---|---|---|
| Occupancy today | 100% | 92% |
| Suites | 6 | 6 |
| Leases expiring in the next 12 months | 4 of 6 | 1 of 6 |
| Largest tenant share of rent | About 40% | About 18% |
| Below-market leases | 2 suites | None identified |
| Known termination right | One tenant | None identified |
| Deferred capital | Material items identified | Identified and planned |
What the comparison is for
Condition A can photograph and summarize better. It is fully occupied. Condition B has vacancy that has to be explained.
Condition A also has concentrated rollover, tenant concentration, below-market leases, a termination right, and deferred capital. The next twelve months may require simultaneous renewals, re-leasing, concessions, and capital — against income that is less diversified than the occupancy rate suggests.
Condition B may still have problems. Vacancy itself is a risk. The point is that 92% occupancy with staggered expirations and less concentration can be the more durable income stream. The occupancy percentage does not settle that question.
What can change the answer
A rent roll is a starting document. Durability still depends on facts that may not be in the summary:
- Executed leases, amendments, and commencement dates — not a summary chart.
- Options, notices, and termination provisions.
- Tenant financials and actual payment history.
- Whether in-place rents are sustainable relative to the space, the tenant's business, and the cost to replace them.
- The capital required to retain or replace tenants.
- How long replacement would take, and at what cost, if a concentrated expiration window arrives at once.
PCG view
100% occupancy is a fact about today. What that occupancy means is an underwriting question about tomorrow.
Treat the occupancy rate as an input. Then ask whether the leases, tenants, capital plan, and replacement costs make the current income stream something a buyer or owner should expect to keep.
Occupancy is evidence. Durability is the analysis.
This example is illustrative and hypothetical. It is not a description of a specific property, listing, or PCG client assignment, and it is not an appraisal or a recommendation.