Kansas Late Rent Fee Rules

Kansas's Residential Landlord and Tenant Act (K.S.A. Ch. 58, Art. 25) contains no provision limiting the amount of a late fee, requiring a grace period, or otherwise regulating late charges. A late fee is therefore a contractual matter: it is enforceable only if stated in the written rental agreement. Because there is no statutory ceiling, the lease governs the amount and trigger, though a fee that functions as an unreasonable penalty rather than a genuine estimate of the landlord's loss may be challenged in court. For nonpayment of rent, the separate eviction notice rules in K.S.A. 58-2564 apply.

No specific statutory penalty. An undisclosed or contractually unsupported late fee is generally unenforceable, and a court may refuse to enforce a charge that operates as an unreasonable penalty.