Wisconsin Security Deposit Return: The 21-Day Deadline (2026)

How long a landlord has to return your deposit, and what you can claim if they miss it

At a glance

• Return deadline: 21 days after vacating
• Measured from: the date the rental agreement terminates, or the date the tenant vacates/rerents, depending on the circumstances
• Penalty for late or wrongful withholding: 2x (applies automatically)
• Deposit cap: No statewide cap. Wisconsin imposes no statutory limit on the amount of a residential security deposit under Wis. Stat. § 704.28 or ATCP 134.06.
• Small claims cap: $10,000

Who this covers — and who it does not

This page covers residential security deposits in Wisconsin, where a landlord has kept some or all of a deposit after a tenancy ends.

It does not cover:

• Commercial leases
• Deposits held in an escrow account or with a third party
• Disputes about damage charges in an ongoing (not ended) tenancy
• Any state other than Wisconsin

Lease terms and local ordinances can change what applies. Where a city has its own deposit rules, those may differ from the state statute below.

What the statute actually says

Penalties

• A landlord who withholds in bad faith may be liable for 2x the portion wrongfully withheld.

  A landlord who violates the security-deposit rules (Wis. Stat. § 704.28 and Wis. Admin. Code ATCP 134.06) is subject to double damages under Wis. Stat. § 100.20(5): the tenant recovers twice the amount of the pecuniary loss, together with costs including a reasonable attorney's fee. This award is mandatory. The basis is the pecuniary loss from wrongful withholding (the wrongfully withheld amount), not the full deposit.

  Wis. Stat. § 100.20(5) ↗

Working out your own deadline

The clock does not start on the day you decided to leave. In Wisconsin it starts the date the rental agreement terminates, or the date the tenant vacates/rerents, depending on the circumstances — for most leases that is the date you hand back the keys, not the date your notice period began.

1. Find the date you vacated and returned the keys. Write it down; everything else depends on it.
2. Add 21 calendar days. Count calendar days, not business days.
3. If the landlord has provided a forwarding address, check the statute for whether the deadline is shortened — in some states it is.
4. Note the date the deadline falls on. If the deposit has not arrived by then, the clock for the penalty starts running.

Common landlord defences and how to answer them

Sources and how to verify them

Every figure on this page comes from the official text, not from a summary. The table below lists each provision used and the date it was last checked against the source.

Statute	Last verified	Source
Wis. Stat. § 704.28(4)	2026-10-15	official text ↗
Wis. Stat. § 100.20(5)	2026-10-15	official text ↗
Wis. Stat. § 704.28(4); Wis. Stat. § 100.20(5)	2026-10-15	official text ↗
Wis. Stat. § 704.28 (whole section)	2026-10-15	official text ↗
Wis. Stat. § 704.28(2)	2026-10-15	official text ↗

Primary reference: Wis. Stat. § 704.28. Where the official text and a secondary summary disagree, this page follows the official text and says so. Amendments are recorded on the site changelog.

When you need a lawyer instead of a tool

A self-help letter is the right starting point for a single deposit you can document. Get legal help if:

• You have received an eviction notice — the timeline is now court-driven
• The dispute involves discrimination, unsafe conditions or retaliation
• The amount in dispute exceeds $10,000
• Your landlord has filed anything in court already

Local legal aid organisations and tenant unions offer free help for qualifying cases. They are independent of this site — we list them because they are the right place to go, not because they link here.

More Wisconsin guides

Wisconsin Security Deposit Rules

→ All Wisconsin tenant rights topics

Common questions