South Dakota's security-deposit rules are short, landlord-favorable in their penalties, and, as of mid-2026, freshly changed on one important point that many older online guides may still reflect the former deadline. The state caps a residential deposit at one month's rent, gives the landlord a short window to return it or explain any withholding, a window that was just lengthened from two weeks to 21 days effective July 1, 2026, and layers on a separate rule that lets the tenant demand a full itemized accounting within 45 days. Get the return process wrong and the landlord forfeits the right to keep any of the deposit; retain it in bad faith and there is a modest punitive-damages penalty on top.

For a property manager, the practical picture is that South Dakota is easy to comply with but has two distinct clocks that are easy to confuse, the return-or-explain deadline and the itemized-accounting-on-request deadline, and one of them just changed. This guide walks the actual current rules under South Dakota Codified Laws Chapter 43-32: the one-month cap and its narrow exception, the new 21-day return-or-statement deadline, the 45-day accounting rule, the permitted deductions, and the forfeiture-and-penalty consequences of getting it wrong.

Key Points

• One-month cap: a residential security deposit generally may not exceed one month's rent (§ 43-32-6.1), unless the parties agree to a larger deposit where special conditions pose a danger to the maintenance of the premises.

• 21-day return (new): effective July 1, 2026, the landlord has 21 days (up from two weeks) after the tenancy terminates and the landlord receives the tenant's mailing address to return the deposit or provide a written statement of the reason for any withholding (§ 43-32-24).

• 45-day itemized accounting: on the tenant's request, the landlord must provide an itemized accounting of any amount withheld within 45 days after termination.

• Permitted deductions: only amounts reasonably necessary for unpaid rent or other funds owed, or to restore the unit to its move-in condition, ordinary wear and tear excepted.

• Forfeiture: a landlord who fails to comply forfeits all rights to withhold any portion of the deposit.

• Bad-faith penalty: bad-faith retention (including failing to provide the written statement or accounting) exposes the landlord to punitive damages up to $200.

• No account/interest rule in Chapter 43-32: the deposit statute does not require the deposit to be held separately or to earn interest (though licensed property managers may have separate trust-account rules).

The One-Month Cap (and Its Narrow Exception)

South Dakota does have a statutory limit on the deposit amount, a point worth stating clearly because it is sometimes confused with truly no-cap states. Under § 43-32-6.1, a landlord may not demand or receive a residential security deposit, however denominated, greater than one month's rent. That is the baseline rule, and it is the answer to the most common question tenants and out-of-state managers ask.

There is one narrow exception. Under § 43-32-6.1, a larger deposit may be agreed upon between the landlord and the tenant where special conditions pose a danger to the maintenance of the premises. This is not a general "charge what you like" escape hatch; it requires genuine special conditions justifying the higher amount, and, as a practical matter, a landlord relying on the exception should document the agreement and the conditions. Absent that, one month's rent is the ceiling, and an over-cap demand is unlawful. Note also that the cap reaches broadly: § 43-32-6.1 defines a security deposit as any deposit of money whose function is to secure performance of the rental agreement, "however denominated," so a charge labeled something else does not automatically escape the one-month limit.

For contrast, some states impose no deposit cap at all, RIOO's guide to Wyoming security deposit laws covers a neighboring state that sets no statutory maximum, which makes South Dakota's one-month rule a middle-ground position: a real cap, but a single month rather than the two-month ceilings common in more tenant-protective states.

The New 21-Day Return-or-Statement Deadline

Here is the provision that changed, and the one a manager most needs to get current on. Under § 43-32-24, after the tenancy ends, the landlord must, within a set period, either return the security deposit to the tenant or furnish the tenant with a written statement showing the specific reason for withholding the deposit or any portion of it.

The length of that period just changed. For years the deadline was two weeks, and most online guides still say two weeks. But effective July 1, 2026, South Dakota amended § 43-32-24 (SL 2026, ch. 179) to lengthen the period to twenty-one (21) days. So under the current rule, the landlord has 21 days after the tenancy terminates and the landlord receives the tenant's mailing address or delivery instructions to return the deposit or send the written withholding statement. A manager working from an older summary that still says "two weeks" is now working from a superseded number.

Two timing details matter. First, the 21-day period runs after the tenancy terminates and the landlord receives the tenant's mailing address or delivery instructions, so if the tenant has not provided a mailing address or delivery instructions, the statutory 21-day period has not yet been triggered by that receipt requirement, though the landlord's underlying obligation does not disappear. Second, the requirement at this stage is either the return or a written statement of the reason for withholding; the landlord does not have to have completed a full itemized accounting within the 21 days, that is the separate 45-day rule below.

The Separate 45-Day Itemized-Accounting Rule

South Dakota's second clock is the one that gives the return process its two-part structure, and it is easy to confuse with the first. Under § 43-32-24, if the tenant requests it, the landlord must provide an itemized accounting of any deposit withheld within 45 days after termination of the tenancy. This rule is not new, it predates the 2026 amendment; what changed in 2026 was only the return-or-statement period (from two weeks to 21 days), not the 45-day accounting.

The distinction is worth stating plainly, because conflating the two clocks is the most common South Dakota deposit error:

• The 21-day deadline is to return the deposit or give a written statement of the reason for any withholding. It applies automatically.

• The 45-day deadline is to provide a detailed itemized accounting of what was withheld and why. It applies only on the tenant's request, and it does not replace or extend the 21-day return-or-statement obligation.

In practice, a compliant landlord returns the deposit (or sends the written withholding reason) within 21 days, and then, if the tenant asks for the line-by-line detail, provides the itemized accounting within 45 days of termination. A landlord who provides a thorough itemized statement up front within the 21-day window may already have provided the information that would otherwise be required in response to a later accounting request. 

A landlord who provides a thorough itemized statement up front within the 21-day window has effectively satisfied both, but the two obligations are legally distinct, and missing either is noncompliance with the section.

Permitted Deductions

South Dakota limits what a landlord may keep. Under § 43-32-24, the landlord may withhold only such amounts as are reasonably necessary to (1) remedy the tenant's defaults in the payment of rent or of other funds due to the landlord under the agreement, or (2) restore the premises to their condition at the commencement of the tenancy, ordinary wear and tear excepted.

The wear-and-tear line is the usual battleground. Ordinary deterioration from normal living, small nail holes, light carpet wear, minor scuffs, is not deductible; damage beyond that is. On cleaning specifically, the basic turnover cleaning that comes with ordinary use is the landlord's cost and cannot be charged to the deposit, while cleaning necessitated by stains, excessive dirt, or damage beyond normal use can be. Because a deduction that a court later finds improper can, combined with a procedural misstep, cost the landlord the entire deposit (below), the safe practice is to deduct only for genuine, documented damage or unpaid obligations and to keep move-in and move-out condition evidence.

The Consequences: Forfeiture and the $200 Bad-Faith Penalty

South Dakota's enforcement is distinctive: the primary consequence is not a damages multiplier but a forfeiture rule, backed by a small fixed penalty for bad faith.

Forfeiture. Under § 43-32-24, a landlord who fails to comply with the section forfeits all rights to withhold any portion of the deposit. This is the real teeth. It means a landlord who blows the 21-day deadline, or fails to provide the required written statement or (on request) the 45-day itemized accounting, loses the right to keep any of the deposit, even if there was genuine unpaid rent or real damage. The procedural failure forfeits the substantive right to deduct. That makes the process, not just the merits of the deductions, decisive.

Bad-faith penalty. On top of forfeiture, the bad-faith retention of a deposit or any portion of it, including the bad-faith failure to provide the written statement or the itemized accounting, subjects the landlord to punitive damages not to exceed $200. Note what this is and is not: it is a fixed statutory cap of $200, not a double- or triple-damages multiplier of the kind many states impose. So a South Dakota deposit dispute is driven primarily by the forfeiture rule (which can cost the landlord the whole deposit) rather than by a large punitive multiplier; the $200 is a modest add-on for bad faith.

For a manager, the takeaway is that South Dakota's penalty structure rewards process discipline above almost everything else: the amount of the deductions matters less than whether the return-and-accounting procedure was followed on time, because a procedural miss forfeits the deductions entirely.

What South Dakota Does Not Require

A couple of "no requirement" points round out the picture. Chapter 43-32 does not itself require a residential security deposit to be held in a separate or interest-bearing account, or require interest to be paid on the deposit; the deposit rules are almost entirely about the return process, the amount cap, the two return-and-accounting clocks, and the forfeiture/penalty consequences, rather than about how the money is held during the tenancy. One caveat for managers specifically: licensed property managers may have separate trust-account and accounting obligations under South Dakota's real-estate and property-management rules, distinct from what Chapter 43-32 requires of landlords generally, so a manager should confirm whether those apply to their operation. And keeping deposits segregated is good practice regardless, since the money has to be available on a short clock.

Where South Dakota Landlords Create Preventable Risk

Because the amount rules are simple but the return process is strict and just changed, most avoidable South Dakota deposit problems are timing or documentation failures.

Using the old two-week deadline. As of July 1, 2026, the return-or-statement window is 21 days, not two weeks. A manager relying on an outdated summary may think they have a different amount of time than they do; work from the current 21-day rule.

Confusing the 21-day and 45-day clocks. The 21-day deadline is to return or give a written withholding reason; the 45-day deadline is to provide an itemized accounting on request. They are separate, and missing either is noncompliance.

Miscounting the trigger. The return clock runs after the tenancy terminates and the landlord receives the tenant's mailing address or delivery instructions. Record the date that address arrives.

Exceeding the one-month cap. A deposit over one month's rent is unlawful absent an agreement justified by genuine special conditions; a routine higher deposit, however labeled, is an over-cap demand.

Forgetting that a procedural miss forfeits the deductions. A late return or a missing statement forfeits all withholding rights, even for real damage or unpaid rent. The process is as important as the merits.

Deducting for ordinary wear and tear. Only unpaid rent/other funds and restoration beyond wear and tear are deductible; an improper deduction, plus a procedural slip, can cost the whole deposit.

Because the return, the written statement, and the itemized accounting all run on deadlines, keeping the move-out inspection, the deduction documentation, and the forwarding-address date organized is what keeps a South Dakota deposit return clean. These deposit rules also sit alongside the state's fast eviction process, covered in RIOO's guide to the South Dakota eviction process, and running the move-out and deposit reconciliation through a structured move-in and move-out process is what produces the documented, itemized accounting the statute requires and captures the address date that starts the 21-day clock.

Key Takeaways for South Dakota Landlords

• South Dakota caps a residential security deposit at one month's rent (§ 43-32-6.1), with a narrow exception where the parties agree to more because special conditions pose a danger to the maintenance of the premises; the cap reaches any deposit securing the agreement, "however denominated"

• Effective July 1, 2026, the landlord has 21 days (up from two weeks) after the tenancy terminates and receipt of the tenant's mailing address to return the deposit or provide a written statement of the reason for any withholding (§ 43-32-24)

• On the tenant's request, the landlord must provide an itemized accounting of any withheld amount within 45 days after termination, a separate, pre-existing obligation from the newly-changed 21-day return

• Permitted deductions are limited to unpaid rent or other funds owed and restoration to move-in condition, ordinary wear and tear excepted

• A landlord who fails to comply forfeits all rights to withhold any portion of the deposit, the primary penalty is forfeiture, not a damages multiplier

• Bad-faith retention adds punitive damages up to $200 (a fixed cap, not a multiple of the deposit)

• Chapter 43-32 does not require a separate account or interest, though licensed property managers may have separate trust-account obligations

The Process-Discipline Mindset

The most useful way to think about South Dakota deposits is that the state keeps the rules few but makes the process decisive. There is a real cap (one month), but the amount side is simple; the action is all on the return, where two clocks now run, the 21-day return-or-statement deadline (new as of July 1, 2026) and the 45-day itemized-accounting-on-request rule, and where a procedural miss forfeits the right to keep any of the deposit regardless of the merits. That structure rewards a manager who treats the return process as the compliance event it is: capture the forwarding-address date, return the deposit or send the written withholding statement within 21 days, provide the itemized accounting within 45 days if asked, and document every deduction. Do that, and the modest $200 bad-faith penalty and the forfeiture rule never come into play. In a state that regulates the amount lightly but the process strictly, and that just moved one of the deadlines, working from the current rule is the whole job.

Frequently Asked Questions

1. Is there a limit on security deposits in South Dakota?

Yes. Under S.D. Codified Laws § 43-32-6.1, a residential security deposit generally may not exceed one month's rent. A larger deposit may be agreed upon between the landlord and tenant only where special conditions pose a danger to the maintenance of the premises. The cap applies to any deposit securing the rental agreement, "however denominated," so relabeling a charge does not automatically escape it. Chapter 43-32 does not require the deposit to be held in a separate or interest-bearing account.

2. How long does a South Dakota landlord have to return a security deposit?

As of July 1, 2026, 21 days. Under § 43-32-24 (as amended by SL 2026, ch. 179), the landlord must, within 21 days after the tenancy terminates and the landlord receives the tenant's mailing address or delivery instructions, either return the deposit or provide a written statement of the reason for any withholding. This period was two weeks before July 1, 2026, so older guides citing "two weeks" are out of date.

3. What is the 45-day rule in South Dakota?

Separately from the 21-day return-or-statement deadline, if the tenant requests it, the landlord must provide an itemized accounting of any amount withheld within 45 days after the tenancy ends (§ 43-32-24). This 45-day accounting rule is not new, it predates the 2026 amendment. It is on request and does not replace or extend the 21-day obligation to return the deposit or give a written withholding reason.

4. What can a South Dakota landlord deduct from a security deposit?

Under § 43-32-24, only amounts reasonably necessary to remedy the tenant's defaults in paying rent or other funds owed under the agreement, or to restore the premises to their move-in condition, ordinary wear and tear excepted. Basic turnover cleaning and normal wear cannot be deducted; damage or cleaning beyond normal use can be.

5. What is the penalty if a South Dakota landlord doesn't return the deposit properly?

Two consequences. First, a landlord who fails to comply with § 43-32-24 forfeits all rights to withhold any portion of the deposit, so the tenant can recover the full amount even if there was real damage or unpaid rent. Second, bad-faith retention (including failing to provide the written statement or itemized accounting) adds punitive damages up to $200, a fixed statutory cap, not a multiple of the deposit.

6. Does the tenant have to provide a forwarding address in South Dakota?

The 21-day statutory return period is triggered after the tenancy terminates and the landlord receives the tenant's mailing address or delivery instructions. If the tenant has not provided that information, the 21-day period has not yet been triggered by that receipt requirement. The landlord's underlying obligation to return or account for the deposit does not disappear.

Note: This article is for general informational purposes only and is not legal advice. It reflects South Dakota's residential security-deposit statutes (S.D. Codified Laws §§ 43-32-6.1 and 43-32-24), including the amendment to § 43-32-24 effective July 1, 2026 (SL 2026, ch. 179) lengthening the return period to 21 days, as of 2026. Licensed property managers may have additional trust-account obligations under separate rules. Statutes change and individual situations vary; confirm the current statute and consult a qualified South Dakota attorney before withholding a deposit or acting on a dispute.