Prove It Before You Charge It: California's New Operating-Expense Rules for Small-Business Tenants
Most California triple-net leases assume that if the lease says a tenant pays its share of operating expenses, the landlord can bill it. Since January 1, 2025, that is no longer true for a large class of small tenants.
The Commercial Tenant Protection Act (SB 1103) added Civil Code § 1950.9, which conditions a landlord's right to pass through operating costs on paperwork: specific notices, specific documents, and a hard production deadline. Fall short, and the charge can't be collected, the landlord's eviction case can collapse, and willful violations carry treble and punitive damages.
Which Tenants Are Covered
The rules protect qualified commercial tenants (QCTs): microenterprises, restaurants with fewer than 10 employees, and 501(c)(3) nonprofits with fewer than 20 employees.
Coverage depends on the tenant raising it. Under Civil Code § 827, a tenant must give the landlord written notice of its QCT status and a self-attestation of headcount, at or before lease signing and annually for any tenancy longer than month-to-month. Without the attestation, the protections don't attach.
"Microenterprise" is narrower than it sounds. Under Business & Professions Code § 18000(a), it means a business with five or fewer employees, owner included, that also generally lacks sufficient access to loans, equity, or other capital. The statute doesn't define "sufficient access" or set any financial threshold, so headcount is the only prong a landlord can actually verify. A well-capitalized five-person company technically doesn't qualify, but in practice landlords rarely challenge the capital prong.
Six Conditions, All Required
Under § 1950.9(a), a landlord may charge a QCT for building operating costs only if every one of these conditions is met:
The allocation is proportional and documented. Costs are split by square footage or another method, and the landlord gives the tenant documentation substantiating that method.
The costs are recent or imminent. They were incurred within the past 18 months or are reasonably expected within the next 12.
The tenant got notice before signing. The landlord told the prospective tenant, in writing, that supporting documentation is available on request.
The landlord produces on time. It delivers the documentation within 30 days of a written request.
There is no pass-through of direct costs. Nothing the tenant already pays a third party directly is billed again through the landlord.
There is no double recovery. Nothing already reimbursed by insurance, another tenant, or a third party is charged.
If any condition fails, § 1950.9(b) bars the charge until the documentation is produced.
The Documentation Standard
This is where most landlords' current practices fall short. Under § 1950.9(f)(6), "supporting documentation" means a dated, itemized quote, contract, receipt, or invoice from a licensed contractor or service provider, plus two additions:
a tabulation showing how the cost was allocated among tenants, and
a signed, dated landlord attestation that the documents and costs are true and correct.
A year-end CAM spreadsheet doesn't meet that standard, and neither does an internal estimate or a lease clause reciting that expenses are "allocated pro rata." The statute requires proof of both the cost and the allocation method.
The same standard applies mid-lease. Under § 1950.9(c), any change to the allocation formula that increases a QCT's share requires written notice and supporting documentation explaining the basis for the change.
Why It Matters: Defense and Damages
The statute creates two kinds of exposure.
It can defeat an eviction. Under § 1950.9(d), a QCT sued for possession over unpaid operating costs can raise the landlord's noncompliance as an affirmative defense.
It carries escalating damages. Under § 1950.9(e), a violation exposes the landlord to actual damages and discretionary attorney's fees. If the tenant proves willfulness, oppression, fraud, or malice, treble and punitive damages are also available.
A Landlord's Compliance Checklist
Track attestations. Calendar the § 827 self-attestation and its annual renewal for every small tenant. For microenterprises, the form should address both headcount and capital access.
Add the pre-lease notice. Include the § 1950.9(a)(3) documentation notice in every LOI-to-lease package for small-business, restaurant, and nonprofit prospects, before signature.
Keep the backup ready. Maintain invoices, allocation tabulations, and a signed attestation for each pass-through, so a 30-day request is a retrieval task rather than a reconstruction project.
Update the lease form. Pair the standard operating expense clause with a QCT documentation rider.
Treat formula changes separately. Don't fold an allocation change into a routine reconciliation letter. Send its own notice with full backup.
This article is for general informational purposes only and is not legal advice. Landlords should consult counsel about lease-specific compliance with the Commercial Tenant Protection Act.