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A property tax bill is issued to the property owner, but that does not always mean the owner absorbs the cost. In commercial real estate, who pays commercial property taxes is usually decided by the lease. The difference can materially affect net operating income, tenant occupancy costs, lease negotiations, and the accuracy of an investment pro forma.

For Los Angeles commercial owners, the answer should never be assumed based on a lease label alone. A lease may be called “triple net” while still limiting tax recoveries, excluding certain assessments, or imposing caps that leave the owner responsible for part of an increase. The enforceable answer is in the lease language, the tax bill, and the way expenses are administered.

The legal taxpayer is usually the property owner

County tax authorities assess real property taxes against the owner of record. The owner receives the secured property tax bill and remains responsible for payment to the county, even if the lease requires the tenant to reimburse 100% of the expense.

That distinction matters. If a tenant fails to pay its share of taxes, the county does not pursue the tenant under the lease. The owner remains exposed to penalties, interest, and ultimately a tax lien if the bill is not paid. The owner can then enforce the tenant’s reimbursement obligation under the lease, subject to its notice, default, and remedy provisions.

In other words, there are two separate questions: who owes the government, and who bears the economic cost. The owner generally owes the government. The lease determines whether the owner, tenant, or both parties bear the cost.

Who pays commercial property taxes under each lease type?

Commercial leases allocate operating expenses in several common ways. The labels are useful starting points, but they are not substitutes for reviewing the actual agreement.

Gross leases

Under a traditional gross lease, the tenant pays a fixed base rent and the landlord generally pays property taxes, building insurance, maintenance, and other operating costs. This structure gives a tenant predictable occupancy costs, which can be attractive to office users and smaller businesses managing a fixed budget.

The owner takes on more expense risk. If taxes rise after a reassessment, a special assessment, or a local levy, the increase can reduce the owner’s return unless the lease provides for annual rent increases or another recovery method. Gross leases should be priced with that risk in mind.

Modified gross leases

A modified gross lease splits operating costs between owner and tenant. The tenant may pay base rent plus its share of increases in taxes, insurance, and common area maintenance expenses over a stated base year or expense stop.

For example, an owner may pay property taxes at the level incurred during the first lease year. The tenant then reimburses its proportionate share of any increase above that amount in later years. This arrangement is common in multi-tenant office and retail properties because it offers more cost protection than a gross lease without shifting every expense directly to the tenant.

The details matter. The lease should identify the base year, explain how the tenant’s share is calculated, state whether controllable expense caps apply, and address how tax refunds or corrections are handled.

Net and double-net leases

In a net lease, the tenant pays base rent plus one or more operating expenses. In a double-net lease, tenants commonly pay their share of property taxes and insurance, while the owner may remain responsible for structural repairs, management, or certain maintenance items.

Tax reimbursement is often calculated based on the tenant’s rentable square footage divided by the building’s total rentable square footage. In a multi-tenant property, this should be clearly defined. A denominator that changes as space is added, removed, or remeasured can create avoidable disputes.

Triple-net leases

In a triple-net, or NNN, lease, the tenant typically pays base rent plus property taxes, insurance, and maintenance costs. A single-tenant NNN lease may require the tenant to reimburse all property taxes for the parcel. In a multi-tenant center, each tenant generally pays a proportionate share through additional rent or common area maintenance charges.

Triple-net does not automatically mean every tax-related cost is recoverable. The lease may exclude penalties caused by the owner’s late payment, taxes on the owner’s income, transfer taxes, or costs tied to a prior owner’s obligations. It may also treat special assessments differently from ordinary ad valorem property taxes.

Reassessments can change the economics quickly

California’s property tax framework can make reassessment a major issue in commercial lease negotiations. A sale or qualifying change in ownership may lead to a reassessment, potentially increasing the property tax burden significantly. New construction and certain improvements can also affect assessed value.

The key question is whether the lease permits the owner to pass through the resulting increase. Some leases allow full recovery of all real estate taxes, including reassessment-related increases. Others limit recovery to increases that are not caused by the owner’s sale, financing, development activity, or ownership transfer.

This is especially relevant when acquiring an occupied property. An investor should not assume that an existing tenant will cover the post-acquisition tax increase just because the lease is described as NNN. Review the tax definition, reassessment language, exclusions, caps, and any historical reconciliation statements before underwriting the asset.

Special assessments and tax appeals need clear treatment

Property tax bills can include more than the base ad valorem tax. They may reflect voter-approved charges, local assessments, district levies, or installment payments for improvements. Whether these charges are recoverable depends on the lease definition of “Taxes.”

Well-drafted commercial leases specify whether special assessments are passed through in the year billed or amortized over the assessment period. They also address tax appeal costs and refunds. If an owner successfully appeals an assessment, the lease should establish whether tenants receive a credit for their share of the refund and whether reasonable appeal expenses can be recovered.

Owners should not treat penalties and late fees as ordinary pass-through expenses. If they result from the owner’s delayed payment or administrative error, they are commonly excluded from tenant charges and can damage a productive tenant relationship.

Administering tax pass-throughs requires discipline

Even when a lease clearly places taxes on the tenant, collection and accounting still require active management. The owner or property manager should calendar county payment deadlines, verify the tax bill against prior years, apply the correct tenant share, and issue reconciliations in the format and timeframe required by the lease.

For Los Angeles County secured property taxes, payment timing is particularly important. The first installment is generally delinquent after December 10, and the second installment is generally delinquent after April 10. Owners should confirm the current bill and deadlines for each property, especially where tax parcels, supplemental bills, or unsecured assessments are involved.

A reliable annual reconciliation should show the actual tax amount, any applicable credits, the tenant’s proportionate share, amounts already collected, and the remaining balance or refund. Supporting documentation should be retained. Clear records reduce disputes and give owners a defensible basis for enforcing the lease if a tenant challenges a charge.

Questions owners should answer before signing or renewing

Before a new commercial lease is executed, owners should confirm four practical points: which taxes are recoverable, how the tenant’s share is calculated, whether reassessment increases are recoverable, and when reimbursements are due. Those answers should be consistent across the lease, operating expense budget, rent schedule, and property accounting system.

It is also worth considering the market trade-off. A broad tax pass-through protects ownership income, but a tenant may seek a lower base rent, caps on increases, or more precise exclusions in return. For credit tenants and long-term leases, the right allocation is often less about shifting every possible cost and more about creating a structure both parties can understand and administer.

For owners with multiple suites, changing occupancy, or older lease forms, professional oversight can prevent small billing errors from becoming revenue leakage. King George Property Management helps Los Angeles owners keep lease obligations, tenant billing, and operating records aligned so property performance is not left to assumption.

The most useful rule is simple: pay the county bill on time, then recover costs exactly as the lease permits. A clear lease and consistent administration protect the owner’s income while giving commercial tenants the transparency they expect.