Triple Net Lease (NNN): why operators treat real estate like a bond Copy 3

How NNN actually works

A triple-net lease shifts three categories of operating expense from landlord to tenant: property taxes, insurance, and common area maintenance (CAM). The tenant pays them directly — or reimburses the landlord who pays them on their behalf. The "rent" line becomes the landlord's take-home: no subtraction, no operating budget to manage.

This matters because it turns a real estate asset into a financial instrument. You're no longer underwriting operational execution. You're underwriting one thing: will the tenant keep paying?

The yield premium that justifies the structure

The whole argument for NNN investing collapses into a yield-spread question. Does the cap rate on this lease clear the yield on a corporate bond of the same tenant's credit, plus the illiquidity premium you're demanding to own the real estate?

In April 2026, a 15-year NNN lease to a BBB-rated industrial credit tenant trades at roughly a 7.25% cap. The same issuer's 15-year senior unsecured paper yields ~5.4%. That 185 bps spread is your whole compensation for owning illiquid real estate, carrying residual risk, managing re-leasing at expiration, and the landlord's quiet operational obligations we'll get to next.

Where NNN quietly breaks

Every NNN deal looks pristine in the abstract. The cracks show up in three places — none of which appear in the marketing OM.

Roof and structure

Almost every NNN carves out roof and structural integrity from tenant obligations. Translation: you own a 40-year roof on a 15-year lease. A $350K roof replacement in year 11 converts your 7.25% cap rate into something closer to 6.4%.

Re-leasing the last three years

A 15-year NNN lease has real option value for years 1–12. The last three years — when the tenant may or may not renew — carry most of the risk most people never price in. Modeling requires a scenario distribution, not a point estimate.

The three clauses every LP flags

If you're raising capital against a single-tenant NNN deal, your LPs will go to three specific places in the lease. If you can't defend these in 30 seconds each, the check doesn't come.

The go-dark clause

Can the tenant stop operating but keep paying? If yes, you can't re-lease the space, and your exit cap rate gets destroyed. If no, you have a protected rent stream.

Assignment and sublet

Can the tenant assign to a weaker credit without landlord approval? A BBB lease that gets assigned to an unrated operating entity is no longer the bond you underwrote.

The termination option

Mid-term termination rights with liquidated damages are common in build-to-suit deals. LPs want to know the NPV of the damages versus the remaining rent stream. The gap is usually bigger than operators admit.

When NNN is the wrong structure

NNN is a yield play. When you want to create value through operational intensity — lease-up, tenant curation, operating partner JVs, or heavy asset management — you almost never want an NNN structure. You want a gross or modified-gross lease where the landlord controls the cost base and captures the upside of running the asset well.

The honest version: if you can't articulate why this particular deal is better as a bond than as an operating business, you're reaching for NNN because it's simple — which is rarely the right reason.