Triple-Net Lease (NNN)

A triple-net lease — written NNN — is a lease where the tenant pays not only base rent but also the three "nets": real estate taxes, building insurance, and operating expenses (typically structured as CAM). The landlord receives base rent that is largely insulated from cost inflation, and the tenant absorbs the variable cost of running the property. NNN is the dominant form in US single-tenant retail and net-lease investment portfolios, and it appears in some APAC industrial and large single-tenant deals.

What "triple net" actually covers

The three nets are:

1. Real estate taxes, including property tax assessments and any special district levies. In the US, the tenant pays its pro rata share directly or reimburses the landlord. In APAC, the equivalent is the landlord's tax burden — government rent and rates in Hong Kong, property tax and stamp duty in Singapore, fixed asset tax (固定資産税) in Japan.

2. Building insurance, usually the property and casualty coverage on the building shell, plus any commercial general liability the landlord maintains for common areas. The tenant typically also carries its own liability and contents coverage on top.

3. Operating expenses, the largest of the three, which functionally equals CAM in a multi-tenant context. In a true single-tenant NNN, the tenant operates the property end-to-end and the landlord is essentially passive.

What is not included as standard depends on the lease form. Capital replacements (new roof, new HVAC chiller, structural repairs) are often the landlord's responsibility even in NNN — the so-called "absolute net" or "bondable net" lease pushes everything onto the tenant including capital, and is more common in long-term sale-leasebacks.

NNN vs gross vs modified gross

A gross lease (or full-service lease) bundles operating costs into the base rent — the landlord absorbs the variability. This is common in multi-tenant office.

A modified gross lease sits in the middle: the tenant pays base rent that includes a base year of operating costs, and only pays the increase above the base year. This is the dominant form in US Class A office.

A triple-net lease strips operating costs out of base rent entirely. The tenant pays a lower base rent but writes separate cheques for taxes, insurance, and CAM. Underwriting comparisons must always reduce all three forms to a comparable net effective rent — a $30 NNN deal and a $45 gross deal in the same building are often within a few dollars of each other once everything is added up.

Why landlords prefer NNN

NNN converts a real estate operating business into a fixed-income-like investment. The landlord's revenue is predictable; the tenant takes the operating risk. This is why net-lease REITs (Realty Income, W. P. Carey, NNN REIT) are structured around long-dated NNN tenants — the cash flow looks like a credit instrument.

For a tenant, NNN is acceptable when the tenant is the building's only meaningful occupant (single-tenant retail, distribution centres, build-to-suit corporate HQ) because the tenant already controls the operating decisions. NNN is harder to swallow in a multi-tenant shared building, where the tenant has no control over CAM but pays its share regardless.

APAC where NNN shows up

In Hong Kong and Singapore office, true NNN is rare; most office leases are quasi-modified-gross with a separate management fee. NNN is more common in industrial and logistics assets — large warehouses leased to single users where the tenant operates the site.

In Japan, single-tenant retail and logistics deals (especially sale-leasebacks to J-REITs) increasingly use NNN-style structures, though the term may not appear in the contract — the equivalent is achieved by allocating taxes, insurance, and 共益費 separately from base rent.

For US-style single-tenant retail in APAC — for instance, a flagship store in Ginza or Causeway Bay — landlords sometimes structure as a "double net" (taxes plus insurance) with base rent absorbing operating cost, because retail tenants resist the unpredictability of full operating pass-through.

Reading an NNN lease

The diligence checklist looks similar to any commercial lease but with extra weight on:

• The definition of operating expenses (broad or narrow?).
• Capital expenditure treatment (full pass-through, amortised, or excluded?).
• The tenant's audit right — without it, the tenant is signing blank cheques.
• The landlord's substitution rights for taxes and insurance carriers.
• Force majeure carve-outs for tax assessment increases.

If you are running diligence on a single-tenant net-lease portfolio and need every base rent, expense category, capex provision, and option captured per lease, LeaseTrace extracts those fields with page-level citations back to each PDF.