In commercial real estate, NNN leases are used to create predictable income streams for property owners and streamlined operating cost burdens for tenants, therefore it seems like a fairly risk-free avenue, but is it? These agreements often contain complex clauses that transfer unexpected risks to one or both parties.

Let’s explore this side of Triple-Net Leases in detail!

What are NNN Leases?

A triple-net lease (NNN lease) is a type of commercial real estate lease where the tenant pays not just the base rent, but also these expenses: Property taxes, Building insurance, Maintenance costs. In some NNN lease structures, the tenant may also pay for utilities, roof reserves, and even certain capital expenditures. The NNN lease model is most common in single-tenant properties.

From an investor’s perspective, NNN properties offer:

• Long lease terms (usually 10–25 years)
• Corporate-guaranteed rent from credit tenants
• Minimal management responsibility
• 1031 exchange eligibility for tax-deferred investing
• Predictable, contract-based income

Why Are NNN Leases Considered “Risk-Free”?

Triple-net leases are often described as “safe investments.” While there are tangible reasons to support this argument, they do not describe the whole story. The following are the reasons why NNN properties are considered risk-free:

1. The Credit Tenant Factor: Many NNN properties are leased to large, established companies (sometimes Fortune 500 firms or nationally recognized brands). These tenants usually have strong balance sheets, legal obligations, and reputational reasons to keep paying rent. This lowers the risk of default compared to smaller, local tenants.
   
2. Long Lease Terms: A 15-year absolute NNN lease can lock in rental income for a long time. Unlike multifamily or office properties, where leases reset every year, NNN properties often provide long-term income visibility. This reduces near-term leasing risk.
   
3. Passive Ownership Structure: Because the tenant handles taxes, insurance, and maintenance, the landlord avoids most operational headaches. This makes triple-net lease investments feel truly passive.

While these advantages are real, the safety of a triple-net lease depends heavily on the lease language itself not just the tenant’s brand name or the length of the lease. Small clauses around maintenance responsibilities, structural repairs, termination rights, and rent escalations can significantly change the risk profile. This is because in this model, you don’t just own a property, but you own a contract; and in NNN investing, the contract determines everything.

The 3 Hidden Risks Inside NNN Leases

Risk #1: Dark Anchor Clauses

What Is a Dark Anchor Clause?

A dark anchor clause (also called a “go dark provision” or anchor protection clause) is a lease clause that allows a tenant to: Reduce rent, Stop paying rent temporarily, Terminate the lease- if a key “anchor tenant” in the same shopping centre or retail area leaves, shuts down (“goes dark”), or occupancy drops below a certain level.

Where Did Dark Anchor Clauses Come From?

These clauses started in strip centres and inline retail properties. Large stores like grocery stores, big-box retailers, or department stores drove most of the foot traffic. Hence, for instance: If a major anchor store closes and customer traffic drops sharply, smaller tenants may argue that their sales suffer, and so they shouldn’t have to keep paying full market rent.

Originally, this logic made sense in multi-tenant retail environments.

Why Dark Anchor Clauses Matter for NNN Investors

The reason for this is that dark anchor clauses have spread beyond traditional strip centres. They now appear in:

• Freestanding retail pads next to power centres or lifestyle centres
• Ground leases tied to the performance of surrounding retail
• Medical outpatient buildings located near hospital campuses
• QSR and fast-casual pads within a defined retail radius

Therefore, even if you own a single-tenant NNN property, your rent may still depend on neighbouring properties you don’t even control, and that creates a hidden risk. Besides, the real problem is that it is often hidden in the lease, and rarely highlighted in marketing materials.


Risk #2: Co-Tenancy Triggers

What Is a Co-Tenancy Clause?

A co-tenancy clause is a lease provision that links a tenant’s rent obligations, or their right to stay to the occupancy or operation of other tenants in the same shopping center, retail corridor, or development. Unlike a dark anchor clause, which focuses on one specific anchor tenant, a co-tenancy clause may:

• Require certain named tenants to stay open
• Require a minimum overall occupancy level (for example, 80% of the centre)
• Tie rent payments to the health of the broader retail environment

Simply put, your tenant’s rent may again depend on other tenants you don’t own or control.

How Co-Tenancy Triggers Work

There are two main types of co-tenancy clauses:

• Named Co-Tenancy: The lease lists specific tenants that must remain open and operating.

For Example:

If Tenant A (like a specialty grocery store) closes, Tenant B (a fitness studio in the same centre) can: reduce rent, switch to percentage rent, terminate the lease.

• Occupancy Threshold Co-Tenancy: The lease requires a minimum percentage of the center to stay occupied (often 75% to 85%).

If vacancy rises above that level, tenants with co-tenancy rights can: reduce rent, pay substitute rent, or exit entirely.

Co-tenancy clauses introduce external dependency risk into what appears to be a simple triple-net lease investment, because the rent may depend on a retail ecosystem you cannot control, and in NNN investing, not having control is often the real and significant risk.

Risk #3: Deferred Maintenance

What Is Deferred Maintenance?

Deferred maintenance refers to repairs or capital improvements that are postponed instead of being completed when they are needed. In real estate, this usually means a property owner or tenant delays fixing or replacing building components even though wear and tear has already begun. Simply put, it is maintenance that should have been done but was not. Deferred maintenance often occurs because:

• The tenant wants to reduce short-term expenses
• The owner plans to sell soon
• The lease is near expiration
• The building still functions, even if inefficiently

In long-term NNN leases, tenants- especially franchise operators may have little incentive to invest in capital upgrades in the final years of a lease.

Why Deferred Maintenance Is Risky?

Delaying repairs doesn’t eliminate costs. It just delays them and shifts them forward, and often with added damage.

For example:

• Ignoring minor roof issues can lead to structural damage
• Running outdated HVAC systems increases replacement costs later
• Neglecting ADA or code updates creates re-leasing challenges

Therefore, when a lease ends or a tenant vacates, the landlord is left with: a vacant building, significant capital expenditure requirements, reduced marketability. That’s why deferred maintenance is often described as a hidden liability.

Questions Every NNN Buyer Should Ask When Analysing a Deal

Now that we know the BTS risks NNN-lease structures carry, it is important to also know how to avoid or minimise the chances of those risks. Before acquiring any NNN asset, every investor must go through the following stress-testing questions:

On Dark Anchor Risk:

• Does the lease contain any co-tenancy, dark anchor, or anchor protection provisions? (Read every exhibit and special stipulation.)
• Who are the named anchors, and what is their current financial condition?
• If the named anchor goes dark today, what happens to rent? Over what timeline?
• Does the clause grant a termination right, or only a rent reduction?
• What is the landlord’s cure period, and is it realistic given current market velocity?

On Co-Tenancy Risk:

• What is the current occupancy of the adjacent centre or development?
• Is a specific named co-tenant required to remain open? What is their current trajectory?
• What occupancy threshold triggers a co-tenancy event? How close is the centre to that threshold today?
• Has there been a recent ownership change at the adjacent centre?
   

On Deferred Maintenance:

• Is this lease truly absolute NNN, or is it modified NNN with landlord roof/structural responsibilities?
• When were the HVAC systems last replaced? What is their expected remaining useful life?
• Has the property received a third-party property condition assessment (PCA) within the last 24 months?
• What does the lease say about building condition upon return at expiration?
• Is there a capital reserve account? If so, who controls it and how is it funded?
• If the tenant vacated tomorrow, what would it cost to bring the building to market-ready condition for a replacement tenant?

The NNN lease market offers stable, long-term income, but there are risks, and the true risk and value of the investment lie in the lease itself. Therefore, it is necessary to carefully analyse the lease before purchase. Investors who thoroughly review lease clauses: especially those related to co-tenancy, anchor tenants, and maintenance responsibilities are far better positioned to protect their income.

At RealVal, we provide underwriting for NNN acquisitions, and help you price the risk you’re taking, because in NNN investing, the risk is in the lease. Schedule a due diligence consultation at info@therealval.com.