Wisconsin regulates deposits through a consumer-protection rule — ATCP 134, enforced under Wis. Stat. §100.20 — which changes the flavor entirely: violations aren't just lease disputes, they're unfair trade practices, and the remedy is double damages plus attorney's fees by statute.
How much can a landlord charge?
No statutory cap — one month's rent is typical. But before accepting a deposit, the landlord must give written check-in rights.
The check-in procedure — Wisconsin's baseline machinery
The tenant must be notified in writing that, by a deadline at least 7 days after tenancy starts, they may inspect the unit and report pre-existing damage or defects — and may also request a list of what the previous tenant was charged for. That second right is nearly unique in America: you can see what the landlord billed the last person for, which exposes the classic scam of charging every departing tenant for the same worn carpet. Use both rights, in writing, and keep copies.
The 21-day clock
The landlord must deliver or mail the deposit — minus lawful withholdings, with a written statement of each item withheld — within 21 days of the tenancy ending (with precise trigger rules for early vacancy and re-rental). Withholdings are limited to unpaid rent, utility charges, and damage or waste beyond normal wear and tear; routine carpet cleaning and painting from ordinary use are on the landlord.
The penalty
Because ATCP 134 violations are unfair trade practices, a tenant who prevails recovers twice their pecuniary loss plus costs and reasonable attorney's fees (Wis. Stat. §100.20(5)). Wisconsin small-claims courts apply this to late returns, missing itemizations, and wear-and-tear charges routinely.
Why Wisconsin deposit disputes are documentation disputes
Wisconsin's check-in right exists because the state knows day-one condition decides everything — but a written damage report is only as strong as the proof behind it. "Scratch on floor, reported 8/15" wins arguments when there's a sealed photo of that scratch, dated that day, that nobody can claim was taken later.
SealMove seals it. Every photo and video is cryptographically locked the instant it's captured, independently timestamped, and archived tamper-evident with Face ID. File your check-in report with sealed evidence behind it; at move-out, the walkthrough lines up room-by-room against that baseline — and either party can send the other a report to review and acknowledge, no app required.