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. 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 landlord has to provide that list within a reasonable time — the code sets an outer limit of thirty days after the request, or seven days after the landlord notifies the previous tenant of those deductions, whichever is later. 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. Surrender generally happens when the tenant gives up possession — typically the last day of the tenancy under the lease, the day the tenant returns the keys, or the day the landlord learns the tenant has vacated and abandoned the unit. 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 Wisconsin move-in and move-out checklist and photographs at both ends so you can prove exactly what the tenant caused. When you do withhold, a clean Wisconsin security deposit itemization form keeps the statement organized and defensible, and a Wisconsin security deposit return letter documents the refund itself.

Most deposit disputes never reach a courtroom, but when they do in Wisconsin, they usually land in small claims court under Wisconsin Statutes chapter 799 — a forum designed to be used without a lawyer. As of 2026, the small-claims money limit is ten thousand dollars, which comfortably covers a deposit dispute and the statutory doubling in most cases. Because Wisconsin Statutes section 100.20(5) lets a prevailing tenant recover reasonable attorney’s fees on top of the doubled damages, tenants can and do bring lawyers into even small deposit cases. Verify the current limit, which the Legislature adjusts over time.

The pattern is consistent: Wisconsin deposit cases are won on paper. The landlord who honors the check-in inspection, documents condition at both ends, itemizes clearly, attaches receipts, and mails on time rarely loses — and the tenant who keeps their own photos, the check-in list, and a copy of the written statement is equally well positioned to recover a wrongful withholding, with double damages and fees.

Beyond a routine move-out, a handful of situations trip up Wisconsin landlords because the deposit rules interact with other events. Three come up often.

When the Property Is Sold

When a rental changes hands, the security deposit obligation follows the unit. A selling landlord should either return each deposit (less any lawful deductions, with an itemized statement) to the tenants, or transfer the deposits to the buyer and document the transfer in writing so responsibility is clear. A landlord buying an occupied Wisconsin property should confirm in the closing documents exactly which deposits are being transferred and in what amounts, because the new owner will be answerable to the tenants for returning them at move-out. Sorting this out in escrow avoids a fight later over who holds — and who must return — each deposit.

Roommates and a Single Deposit

Where several tenants share a lease and a single deposit, Wisconsin treats the deposit as one sum tied to the tenancy, not as separate shares. When one roommate leaves and another stays, the landlord’s twenty-one-day obligation is generally triggered only when the tenancy as a whole ends and the unit is surrendered — not each time one roommate moves out mid-lease. Sorting out each roommate’s share of a refund is usually a private matter among the tenants. Landlords should return the single deposit to the tenants collectively unless the lease or a written agreement directs otherwise, and avoid getting drawn into splitting it.

Abandonment and Early Surrender

If a tenant abandons the unit before the lease ends, the twenty-one-day clock generally starts when the landlord learns the tenant has surrendered possession and does not intend to return. The landlord still owes an itemized statement and any refund on that timeline. Note that unpaid rent for the remaining term is a lawful deduction only to the extent the landlord could not reasonably re-rent the unit — Wisconsin requires a landlord to mitigate damages by making reasonable efforts to re-rent. A landlord facing an early departure should review the broader rules in our guide to Wisconsin lease termination laws before withholding for future rent.

Every rule above ultimately turns on proof. Wisconsin places the burden on the landlord to justify each deduction, which means the landlord who cannot document a charge loses it — regardless of whether the damage was real. Build the evidence file across the whole tenancy, not at the end.

At Move-In

• The written check-in notice and the tenant’s completed inspection list, signed and dated.
• Timestamped photos or video of every wall, floor, fixture, and appliance, stored where the date cannot be doubted.
• A written note of any pre-existing wear, so it is never later charged to the tenant.

During the Tenancy

• A dated log of every maintenance request and the landlord’s response, which also rebuts a habitability defense.
• Records of any lawful entry to inspect or repair, made with proper notice under Wisconsin entry rules — see Wisconsin landlord entry laws.

At Move-Out

• A second set of timestamped photos taken at surrender, to compare against move-in.
• Invoices, receipts, or a documented in-house cost for every repair and cleaning charge.
• Proof that the itemized statement and refund were mailed within twenty-one days.

The cheapest deposit dispute is the one that never happens. A few disciplined habits protect a Wisconsin landlord across an entire portfolio.

• Give the check-in notice every time. A written notice of the inspection right and a signed move-in list create the baseline that decides every future deduction.
• Never charge for routine painting or carpet cleaning. Treat those as your own turnover cost; charge only for documented tenant-caused damage.
• Use non-standard provisions properly, or not at all. Any extra charge must be in a titled, initialed NONSTANDARD RENTAL PROVISIONS document — never buried in the lease.
• Calendar the twenty-one-day deadline at surrender and mail the itemized statement with proof, well before it expires.
• Itemize specifically and attach receipts. A clear statement is the single best defense against a double-damages claim.
• Screen carefully before you ever hand over keys. The tenants most likely to leave a unit in disputed condition are often the ones a thorough screening would have flagged.

That last point is where most disputes are actually won — before the lease is ever signed. A prior eviction, a pattern of damage, or unstable finances rarely appears out of nowhere; it usually leaves a trail an applicant’s history reveals. Screening for it is the single highest-leverage habit a Wisconsin landlord can build.

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