Wisconsin Security Deposit Law: The 21-Day Rule and What You Can Deduct
Last reviewed: July 2026
Security deposits are one of the most common — and most costly — places Wisconsin landlords slip up. Wisconsin sets a firm deadline for returning a deposit and specific limits on what you may keep. Here is the plain-English version for independent landlords.
The 21-day deadline
After a tenant moves out and surrenders the unit, a Wisconsin landlord must return the security deposit — or mail the tenant an itemized statement of any amounts withheld — within 21 days.
This is a hard deadline. Put it on the calendar the day a tenant hands back the keys, and send the deposit or the itemized statement to the tenant’s last known address (or a forwarding address they provide) within the 21 days.
What you can withhold
Generally, a landlord may withhold from the deposit for things the tenant is actually responsible for: unpaid rent, unpaid utility charges the tenant agreed to pay, and damage to the unit beyond normal wear and tear.
When you do withhold, you must give the tenant an itemized written statement describing each deduction and the amount. Keep it specific — “cleaning: $150” with no detail invites a dispute.
What you cannot deduct
Wisconsin prohibits deducting from a security deposit for normal wear and tear, and for routine cleaning, painting, or carpet cleaning — the ordinary turnover costs of renting a unit.
There is a narrow exception: a lease may require the tenant to pay for something like routine carpet cleaning only if it was separately negotiated as a nonstandard rental provision — not slipped into standard lease boilerplate. If it wasn’t separately negotiated, you can’t take it from the deposit.
The check-in inspection protects you
When a landlord requires a security deposit, the tenant must be given at least 7 days to inspect the unit and note any pre-existing damage in writing before or at move-in.
That documented check-in — ideally with dated photos — is what protects both sides at move-out. It’s the difference between “this was already like that” being a he-said-she-said and being a record you can point to.
Why getting it wrong is expensive
Missing the 21-day deadline or making a prohibited deduction can expose a Wisconsin landlord to penalties beyond just returning the money. The safest approach is simple: document the move-in, itemize every deduction, and return the balance within 21 days — every time.
How Landlord Command helps
- Security deposit tracking — Track each deposit, its status, and an itemized return — so your state’s return deadline is never a scramble.
- Move-in / move-out inspections — Document unit condition with photos at check-in and compare at move-out — your record if a deduction is ever questioned.
Frequently asked questions
How long does a Wisconsin landlord have to return a security deposit?
Within 21 days after the tenant moves out and surrenders the unit, the landlord must either return the deposit or mail an itemized statement of any deductions.
Can a Wisconsin landlord deduct for carpet cleaning?
Not as a routine matter. Routine carpet cleaning, painting, and cleaning are considered normal turnover costs and generally cannot be deducted — unless the lease required it as a separately negotiated nonstandard rental provision.
What can be deducted from a deposit in Wisconsin?
Generally unpaid rent, unpaid utilities the tenant agreed to pay, and damage beyond normal wear and tear — each described in an itemized written statement.
What happens if a landlord misses the 21-day deadline?
Failing to return the deposit or send an itemized statement on time can expose the landlord to penalties. Treat the 21 days as firm.
This guide is general information for Wisconsin landlords, not legal advice. Laws change and specific situations vary — confirm the current requirements under Wis. Stat. ch. 704 and Wis. Admin. Code ch. ATCP 134, or consult an attorney, before acting.