Michigan Late Rent Fees (No Statutory Cap)

No Michigan statute sets a maximum late fee, a percentage limit, or a mandatory grace period for residential rent. A late fee is purely a matter of contract: it is enforceable only if the written lease provides for it, and the amount must be reasonable. Michigan contract law disfavors penalty clauses, so a late fee that bears no reasonable relationship to the landlord's actual damages can be struck down as an unenforceable penalty, and many courts treat fees of roughly 4-5% of monthly rent as the practical ceiling for reasonableness. There is no separate statutory late-fee statute in the Michigan residential landlord-tenant chapter (MCL Ch. 554); the absence of a cap means the lease terms and the common-law reasonableness/penalty doctrine control.

No specific statutory penalty. An unreasonable late fee can be voided by a court as an unenforceable penalty under Michigan contract law; only fees provided for in the lease are collectible.