Late or unpaid rent in San Francisco: what should landlords do first?

Non-payment situations often aren't what they first appear to be. A rent payment posts a day late because of a bank processing delay, a roommate's share gets misapplied, or a previous credit or partial payment never made it into the ledger correctly. Before assuming a tenant is simply refusing to pay, pull the complete payment history, every date, every amount, every credit, and check it against what the tenant believes they've paid.

This step matters beyond basic fairness. A 3-day notice that states an inflated or incorrect amount can be challenged on that basis in an unlawful detainer proceeding, and an inaccurate notice is one of the more common ways landlords lose ground they didn't need to lose. Reconciling the number correctly the first time is faster than restarting the process after a notice gets thrown out.

California doesn't set a fixed percentage cap on late fees the way some states do. Instead, Civil Code § 1671(d) treats a late fee as liquidated damages, which means it has to reflect a reasonable estimate of the landlord's actual administrative cost from the late payment, not function as a punishment for being late. Courts have struck down fees that were disproportionate to the rent owed; the landmark case Orozco v. Casimiro voided a $350 late fee charged against $600 in rent as an unenforceable penalty.

In practice, landlords and courts commonly treat a fee around 5% of monthly rent as defensible, fees in the 5-8% range as needing documented cost justification to survive a challenge, and anything above roughly 8-10%, or any daily-compounding structure, as routinely struck down. The fee also has to be written explicitly into the lease; nothing about a late fee is automatic or implied. California has no statewide mandatory grace period either, so whatever grace period a tenant gets comes entirely from what the lease itself specifies, not from a baseline state requirement.

This matters directly for the reconciliation step above: if your ledger includes a late fee that wouldn't survive scrutiny, whether because it's disproportionate, compounding daily, or simply undocumented in the lease, that inflated figure is exactly the kind of error that can undermine an otherwise valid non-payment notice.

Once the balance is confirmed accurate, San Francisco non-payment cases proceed under California's standard 3-day notice to pay rent or quit. The count for those 3 days excludes weekends and holidays, so a notice served on a Thursday effectively runs longer in calendar days than one served on a Monday.

Receiving this notice doesn't require the tenant to leave immediately, and the notice period exists specifically to give them a real opportunity to pay before anything further happens. Under San Francisco's Rent Ordinance, non-payment of rent is itself one of the enumerated at-fault just causes covered in the fixed-term lease article in this series, so this process is the correct mechanism whether a specific unit falls under the local ordinance or the state's separate Tenant Protection Act; non-payment is a valid cause under both.

If the tenant pays the confirmed balance in full during the 3-day window, the situation resolves at that stage, without further formal process. Landlords sometimes treat the 3-day notice as a fixed step toward eviction regardless of what happens next, but its actual function is to give the tenant a final, defined opportunity to cure the non-payment before the landlord's next step becomes available.

Accepting a payment after that window has technically closed can also complicate a landlord's position; if rent is accepted after a notice period has run, that acceptance itself can be raised as a procedural defense later. Treating the notice period's deadline as a real, fixed line, rather than something flexible once it's already been served, protects the process on both ends.

If the 3-day period passes without payment or move-out, the next step is filing an unlawful detainer action in court, a formal Summons and Complaint, not any action the landlord takes directly. This starts a court process with its own deadlines: the tenant has a limited, statutorily defined window to respond once served, and missing that response window can result in losing the right to a hearing on the eviction.

This is a genuinely different track from simply waiting out the notice period. Filing, serving the tenant with the court papers, and waiting for the response window to run all take real time, and none of it can be shortened by the landlord's own initiative. There's no point in this sequence where a landlord can act alone to recover the unit.

Whatever the temptation, several actions are flatly prohibited under California Civil Code § 789.3, regardless of how much is owed or how long it's been outstanding: shutting off utilities (water, heat, electricity, gas, telephone, or other essential services), changing the locks or otherwise physically preventing the tenant's access, removing exterior doors or windows to make the unit unlivable, and removing the tenant's personal property without their written consent. For a violation to count, it has to be done willfully, with intent to force the tenant out of the legal eviction process, which describes exactly the scenario a frustrated landlord facing unpaid rent is most likely to end up in.

The financial exposure here is specific and real, not abstract. A tenant who successfully proves a § 789.3 violation can recover actual damages (hotel costs, spoiled food, other direct out-of-pocket losses caused by the violation), statutory damages of up to $100 per day the violation continues, with a guaranteed minimum of $250 per violation, and attorney's fees, which the court must award to whichever side prevails. Multiple violations, say, a lockout combined with a utility shutoff, can each trigger their own separate minimum award and daily penalty calculation, which adds up quickly.