The rent is not the rent

Why the quoted rent understates the deal

A triple-net quote is deliberately incomplete: $24 a foot is the landlord's rent, and the building's own bills — property taxes, insurance, common-area maintenance — arrive on top, passed through to the tenant pro-rata by square footage. On a typical small commercial space the nets add 20–35% to the base, which is the difference between a space that fits the budget and one that quietly does not. The effective rent — base plus all three nets — is the only number that compares one space to another, or a NNN quote to a gross one.

How the number is computed

Everything is stated the way brokers quote it, per rentable square foot per year: effective rent = base + CAM + taxes + insurance. Multiplying by the square footage gives the annual obligation, a twelfth of that the monthly check, and the nets' share of the total shows how much of the cost is pass-through rather than rent. That share is worth watching on its own — the base rent is fixed by the lease, but the nets float with the tax assessment, the insurance market and the maintenance year, so a deal where the nets are 35% of the total carries far more cost uncertainty than one where they are 15%.

Reading it from both sides of the table

For a tenant, the effective rent is the real occupancy cost, and the comparison that matters is against revenue — retailers commonly hold total occupancy cost under roughly 10% of sales. For a landlord, NNN structure is what makes the income durable: the pass-throughs mean a tax reassessment or an insurance repricing lands on the tenants rather than the NOI, which is exactly why single-tenant NNN deals trade at the cap rates they do. The trade is a lower headline rent for insulation from cost inflation — and a NNN building's NOI is unusually close to its collected base rent, which simplifies every valuation built on it.

Common mistakes

The classic one is comparing base rents across lease structures — a $24 NNN space against a $30 gross space reads as cheaper and, with $9 of nets, is not. The next is treating CAM as standardized: what rides inside it is defined by the lease, and management fees, administrative markups and capital-reserve charges appear in some CAM clauses and not others, so two identical quotes can differ by dollars a foot in practice. Estimates versus reconciliations bite too — CAM is billed on an estimate and trued up annually, so the first-year quote is not a ceiling. And watch the basis: all of this is per rentable foot, load factor included, not the usable space you measured with a tape.

If the building is yours, the nets are only half the story — a lender will want the whole picture. The free Schedule of Real Estate Owned generator carries commercial property, NNN flag included, and the break-even occupancy calculator answers what happens to that income when a tenant leaves.