Updated for 2026

Idaho Security Deposit Laws & Calculator

Idaho gives landlords 21 days to return your deposit (up to 30 days by written agreement). There's no cap on deposit amounts, but the penalty is strong: tenants can recover up to 3x the deposit — though you must choose between the treble damages and attorney fees.

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Idaho Security Deposit — Quick Facts

Return Deadline
21 Days
Up to 30 days by written agreement
Maximum Deposit
No State Limit
Penalty for Late Return
Up to 3×
OR attorney fees (not both)
Interest Required
✗ No
Applicable Law
Idaho Code § 6-321
Either/Or Penalty — Choose Wisely: Idaho's penalty structure is unusual. You can recover up to 3x the deposit amount OR attorney fees + court costs — but not both. If your deposit is large, the treble damages may be the better choice. If it's small, attorney fees could exceed 3x. Evaluate your situation before filing.

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Enter your deposit amount and move-out date to see your landlord's deadline and total refund.

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Idaho Security Deposit Law — Explained

The 21-Day Default Deadline

Under Idaho Code § 6-321, landlords have 21 days after the tenancy ends and the tenant vacates to return the security deposit or provide an itemized statement of deductions. This deadline can be extended to up to 30 days if both the landlord and tenant agree in writing — typically in the lease itself.

What Your Landlord Can Deduct

Idaho landlords may deduct for unpaid rent, cleaning costs to restore the unit to its original condition, and damage beyond normal wear and tear. The landlord must provide an itemized statement of all deductions. Normal wear and tear — minor scuffs, faded paint, carpet worn from regular use — cannot be charged to the tenant.

The Either/Or Penalty Structure

Idaho provides a strong but unusual penalty. If a landlord wrongfully withholds a deposit, the tenant can recover up to 3x the amount wrongfully withheld. However, this is an either/or remedy: you get treble damages OR attorney fees and court costs, but not both. This means tenants need to strategically choose which remedy provides the greater recovery.

No Deposit Cap

Idaho does not limit how much a landlord can charge as a security deposit. While most landlords charge 1–2 months' rent, there is no statutory maximum. This makes it especially important to negotiate deposit amounts before signing a lease and to document the unit's condition thoroughly at move-in.

What to Do If Your Landlord Won't Return Your Deposit

  1. 1
    Document everything before you leave Take timestamped photos and video of every room. Keep your lease, receipts, and all communications.
  2. 2
    Provide your forwarding address in writing This ensures the landlord knows where to send the deposit and starts the 21-day clock.
  3. 3
    Send a formal demand letter Use RenterCalc's demand letter generator citing Idaho Code § 6-321. Send via certified mail.
  4. 4
    File in small claims court Idaho's small claims limit is $5,000. Choose between up to 3x damages or attorney fees + court costs (not both).

Idaho Security Deposit FAQ

How long does a landlord have to return a security deposit in Idaho?
Idaho landlords have 21 days to return the deposit. This can be extended to 30 days if agreed to in writing.
What is the maximum security deposit in Idaho?
Idaho has no state limit on security deposit amounts.
What is the penalty for not returning a security deposit in Idaho?
Tenants can recover up to 3x the deposit OR attorney fees + court costs — but not both. You must choose one remedy.
Does Idaho require interest on security deposits?
No. Idaho does not require landlords to pay interest on security deposits.
How do I get my security deposit back in Idaho?
Provide your forwarding address in writing, wait 21 days (or 30 if agreed), send a demand letter citing Idaho Code § 6-321, and file in small claims court (limit: $5,000) if unresolved.

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