Wisconsin Security Deposit Laws: 21-Day Return, Deductions, and Double Damages

Wisconsin security deposit law lives in two places that must be read together: Wisconsin Statutes section 704.28, which lists what a landlord may withhold, and Wisconsin Administrative Code section ATCP 134.06, the consumer-protection rule that governs how deposits are collected, held, and returned. Unlike many states, Wisconsin sets no cap on the deposit amount — but it regulates the process tightly, and the penalty for getting it wrong is severe. This guide walks the whole Wisconsin framework end to end: the absence of a cap, the check-in inspection and prior-tenant-damage disclosure at move-in, the twenty-one-day return deadline and itemized statement, what a landlord may and may not deduct (routine painting and carpet cleaning may not be charged), non-standard rental provisions, and the double-damages-plus-attorney-fee penalty a court can impose when a landlord withholds unlawfully.

Whether you own a single duplex in Madison or a portfolio across Milwaukee County, the rules below apply the same way, because Wisconsin Statutes section 704.28 and Wisconsin Administrative Code section ATCP 134.06 govern statewide. What makes Wisconsin distinctive is the strength of its tenant remedy: a violation of the administrative code is treated as a violation of Wisconsin Statutes section 100.20, which opens the door to double damages and attorney’s fees. Everything here is general information, not legal advice; confirm the current figures and consult a licensed Wisconsin attorney before acting on a specific dispute.

Below, a short overview video summarizes the Wisconsin deposit rules; the sections that follow break down each piece in detail — the no-cap rule, the check-in inspection, deductions versus normal wear and tear, the return timeline, the prohibition on charging for routine painting and carpet cleaning, the penalty framework, the move-out walkthrough, and the small-claims path if a dispute cannot be resolved.

The first thing that surprises landlords coming from other states is that Wisconsin sets no statutory cap on the security deposit. Neither Wisconsin Statutes section 704.28 nor Wisconsin Administrative Code section ATCP 134.06 limits the deposit to a fixed dollar figure or a number of months’ rent. In practice most Wisconsin landlords charge the equivalent of one month’s rent, and the competitive rental market — not a statute — is what keeps the number reasonable. One trap follows from the definition rather than from any cap: ATCP 134.02(11) defines “security deposit” to include not only the total of all payments and deposits given as security but also all rent payments in excess of one month’s prepaid rent. Last month’s rent collected at signing is therefore a security deposit in Wisconsin, and it must come back on the same twenty-one-day clock with the same itemization — a point the administrative code makes explicitly in its own note to ATCP 134.06(2). A landlord is free to ask for more, though a very high deposit can deter good applicants and may draw scrutiny if it looks designed to evade the return rules.

What Wisconsin regulates instead is the handling and return of the deposit. That is where the law has real teeth: the check-in inspection, the twenty-one-day return, the itemized statement, the narrow list of lawful deductions, and the double-damages remedy. In other words, a Wisconsin landlord has wide latitude in setting the deposit but very little in keeping it. Treating the deposit as anything but the tenant’s money held in trust is where landlords get into trouble.

One of Wisconsin’s most distinctive protections happens at the start of the tenancy, not the end. Under Wisconsin Administrative Code section ATCP 134.06(1), before a landlord accepts a security deposit, the landlord must notify the tenant in writing of the tenant’s right to inspect the unit and to report any pre-existing damage or defects. The tenant must be given a reasonable time — at least seven days after the tenancy begins — to complete that inspection and submit the list. Damage the tenant reports on that check-in list cannot later be blamed on the tenant at move-out.

The rule has a second, closely related piece. On the tenant’s request, the landlord must give the tenant a list of the physical damages or defects that were charged to the previous tenant’s security deposit. The deadline is a two-part test and it is the later of the two that controls: ATCP 134.06(1)(b) requires the landlord to provide the list within 30 days after receiving the request, or within 7 days after the landlord notifies the previous tenant of that tenant’s security-deposit deductions, whichever occurs later. Guides that quote only the seven days state a deadline the rule does not impose. The list must cover all physical damages or defects charged to the previous tenant’s deposit whether or not they have since been repaired, though the landlord may note that they were repaired and need not disclose the previous tenant’s identity or the amounts withheld. This lets a new tenant see exactly what condition issues were already known, so the landlord cannot double-charge two successive tenants for the same worn carpet or scuffed wall.

Wisconsin Statutes section 704.28 sets out the exhaustive list of what a landlord may withhold from a security deposit. A landlord may keep only the amount reasonably necessary to cover the items on that list, and bears the burden of showing each deduction is legitimate. Anything not clearly authorized is presumed to be the landlord’s own cost.

Permitted Deductions

• Tenant damage, waste, or neglect. Physical damage to the premises caused by the tenant or the tenant’s guests that goes beyond normal wear and tear — broken fixtures, large holes, pet-stained flooring, and the like.
• Unpaid rent. Rent that remains owed for the final month or any earlier period, subject to any duty the landlord has to mitigate.
• Unpaid utility charges. Utility service the landlord provided but that was not included in rent, and direct utility debt the landlord became liable for because the tenant did not pay.
• Unpaid mobile-home parking permit fees and monthly municipal permit fees assessed against the tenant that the tenant failed to pay.
• Amounts owed under a non-standard rental provision. Any additional item the landlord may withhold only if it was disclosed in a properly executed NONSTANDARD RENTAL PROVISIONS document (explained below).

Not Deductible — Normal Wear and Tear

Wisconsin Statutes section 704.28 expressly bars withholding for normal wear and tear, or for other losses the tenant cannot reasonably be held responsible for. Normal wear and tear is the natural deterioration of a unit from ordinary living, and the landlord must absorb it. Wisconsin treats the following as non-deductible:

• Faded or lightly scuffed paint, and small nail holes from hanging pictures.
• Carpet worn thin along walkways from ordinary foot traffic, with no stains or pet damage.
• Minor marks, loose grout, or caulk that has aged around tubs and sinks.
• Worn but still-functioning appliances and fixtures that simply reached the end of their useful life.

The deadline Wisconsin landlords miss most often is the twenty-one-day return rule. Under Wisconsin Administrative Code section ATCP 134.06(2), the landlord must deliver or mail to the tenant the full amount of the security deposit, less any lawful deductions, within twenty-one days after the tenant surrenders the rental unit. The trigger is more precise than “when the keys come back,” and getting it wrong in either direction causes trouble. ATCP 134.06(2), tracking Wisconsin Statutes section 704.28(4), gives exactly three triggers. (a) If the tenant vacates on the termination date of the rental agreement, the clock runs from the date the agreement terminates. (b) If the tenant vacates or is evicted before that date, it runs from the date the rental agreement terminates — or, if the landlord re-rents the premises before then, from the date the new tenant’s tenancy begins. (c) If the tenant vacates or is evicted after that date, it runs from the date the landlord learns the tenant has vacated or has been removed under Wisconsin Statutes section 799.45(2). Returning the keys is evidence of when one of those happened; it is not itself a fourth trigger. Neither is the landlord’s opportunity to inspect — a fourth trigger some guides add, which would let a landlord postpone the clock indefinitely. The rule also applies when a tenancy ends by eviction. Whenever any amount is withheld, the landlord must include a written itemized statement describing each deduction and its amount.

What the Itemized Statement Must Include

The statement must describe each deduction clearly enough that the tenant can see the basis for it — the nature of the damage or charge, and the dollar amount. A vague line reading only “cleaning” or “damage” invites a challenge. Best practice is to attach supporting invoices or receipts for repair and cleaning work, and for in-house labor, to note what was done, the time spent, and the rate. The clearer the statement, the harder it is for a tenant to argue the withholding was unreasonable.

No Forwarding Address? The Clock Still Runs

A Wisconsin tenant is encouraged, but not strictly required, to provide a forwarding address, and the absence of one does not pause the twenty-one-day clock. If the tenant leaves no address, mail the deposit and itemized statement to the tenant’s last known address — commonly the rental unit itself — and keep proof of mailing. Do not sit on the funds waiting for an address; the obligation to send the statement on time still applies.

Wisconsin gives a landlord one narrow path to withhold for something beyond the standard statutory list: the non-standard rental provision. Under Wisconsin Statutes section 704.28 and Wisconsin Administrative Code section ATCP 134.06, a landlord may deduct for an additional item only if that term is set out in a separate written document, titled NONSTANDARD RENTAL PROVISIONS, that is given to the tenant, discussed with the tenant, and specifically identified — with the tenant signing or initialing next to each provision.

Doing this correctly creates a rebuttable presumption that the tenant agreed to the term. Doing it sloppily — burying a clause in the fine print of the lease, or failing to have the tenant initial it — means the provision does not qualify, and the landlord cannot withhold for it. This is the mechanism a landlord would use to charge, for example, a specific carpet-replacement contribution or a re-keying fee, but only if it is disclosed the right way.

Wisconsin has no statewide requirement to pay interest on a security deposit, and no statewide rule that the deposit be held in a separate escrow account. A Wisconsin landlord may hold deposits in a general account and keep any interest earned, which is entirely lawful. Because there is no interest mandate, there is no interest figure to track at move-out — a meaningful simplification compared with states that require annual interest.

On fees, the key point is disclosure. Wisconsin does not recognize a category of “non-refundable deposit.” Any money a landlord wants to keep beyond the standard statutory deductions must run through a properly executed non-standard rental provision; it cannot simply be labeled non-refundable in the lease. A pet-related charge, a cleaning charge, or any similar item is either a lawful deduction the landlord can prove at move-out or a disclosed non-standard provision the tenant initialed — not a magic “non-refundable” label that defeats the return rules.

Wisconsin backs its deposit rules with an unusually strong remedy. A violation of Wisconsin Administrative Code chapter ATCP 134 is, by law, a violation of Wisconsin Statutes section 100.20 — the unfair-trade-practices statute. Under Wisconsin Statutes section 100.20(5), a tenant who suffers a monetary loss because of that violation may recover twice the amount of the loss, together with court costs and reasonable attorney’s fees. Wisconsin courts have applied this to deposit cases directly; the doubling and the fee award are what make even a modest deposit claim worth pursuing.

The trigger is not merely being wrong about a single deduction — it is a violation of the rule, such as blowing the twenty-one-day deadline, withholding for routine painting or carpet cleaning, refusing to itemize, or keeping money with no lawful basis. A landlord who returns the deposit and a clear itemized statement on time, deducting only for documented, lawful items, is well protected even if a specific charge is later disputed. The penalty exists to punish the landlord who treats the deposit as free money, not the one who makes a documented, good-faith judgment call.

Put the rules together and the Wisconsin move-out becomes a repeatable checklist rather than a judgment call. Follow this sequence and penalty exposure all but disappears.

A thorough move-out record starts at move-in. Use a documented