Is there a statutory late-fee maximum?

No specific dollar or percentage cap in California residential statute. Late fees are governed by Civil Code §1671 as liquidated damages — they must represent a reasonable estimate of actual damages from late payment, not a penalty.

What have courts said?

Courts apply the §1671(d) consumer-contract standard: the late-fee provision is presumptively invalid unless the party seeking to enforce it proves the amount was a reasonable estimate of damages at the time of contracting. Flat fees that don't bear a reasonable relationship to actual late-payment costs have been struck down. Specifics are case-by-case.

What's a defensible late-fee structure?

Document the reasonable-estimate basis at lease signing: administrative time, accounting cost, banking fees, vendor coordination disruption. Keep the amount modest. Avoid escalating per-day fees that compound. Don't combine late fee with NSF fee for the same incident.

Can I charge an NSF fee?

Yes under Civil Code §1719: $25 for the first bounced check, $35 for each subsequent. Cap of $35 + the face amount of the check. This is statutory and not subject to §1671 reasonableness review.

What about a grace period?

Not statutorily required. Most leases include 3–5 day grace. Grace periods reduce dispute friction and strengthen the reasonable-estimate argument if the late fee is challenged. The §1161 3-day pay-or-quit notice is separate — that's eviction procedure, not fee assessment.

§1671 liquidated damages · Reasonable estimate

Late fees in California. Reasonable estimate, not penalty.

No statutory cap. §1671(d) requires the fee be a reasonable estimate of damages, provable by the landlord. Modest, justified, non-escalating fees survive. NSF fees are separate and statutory under §1719.

TL;DR

No cap. §1671(d) reasonable-estimate test, burden on landlord. Modest flat fee after grace works. Escalating/punitive structures fail. §1719 NSF: $25 first, $35 each subsequent. Document the reasonable-estimate basis at lease signing.

3-Day Pay or Quit
Lease Agreements

Common questions — late fees

Statutory cap?

No specific cap.

What courts apply?

§1671(d) reasonable-estimate test.

Defensible structure?

Modest flat fee with documented basis.

NSF fee?

§1719: $25 first, $35 each subsequent.

Grace period?

Not required but recommended.