How Much Can You Collect?

Idaho has no statutory cap on security deposits. Unlike some states that limit deposits to one or two months' rent, Idaho leaves the amount to the landlord's discretion — provided it's reasonable and applied consistently to all applicants (see our fair housing and screening guide for why consistency matters here).

In practice, most Boise-area landlords collect one month's rent as a security deposit. Some charge slightly more for properties with higher-end finishes or for tenants with marginal credit scores.

One important note: whatever amount you state in the lease is the amount you're bound to. Don't collect more than what's documented in the lease agreement.

Security Deposits vs. Non-Refundable Fees: Know the Difference

This distinction matters more than many landlords realize.

A security deposit is refundable — it's the tenant's money, held in trust, returned at the end of the tenancy minus any legitimate deductions. Idaho law governs exactly how it must be handled and returned.

A non-refundable fee (sometimes called a move-in fee or admin fee) is kept by the landlord regardless of the condition the tenant leaves the property in. It's not subject to the same return and itemization requirements.

The critical rule: if you intend a fee to be non-refundable, that must be clearly and explicitly stated in the lease. A fee that isn't labeled non-refundable is generally treated as a refundable deposit under Idaho law. Vague lease language here creates disputes — and usually resolves in the tenant's favor.

Pet Deposits and Pet Fees

The same distinction applies to pet-related charges:

• A pet deposit is refundable and subject to deposit return rules. It can be used to cover pet-related damage at move-out.
• A pet fee is non-refundable and must be clearly labeled as such in the lease.

Neither should be charged to tenants with qualifying assistance animals or emotional support animals under fair housing requirements — those are not pets under the law, and charging a pet deposit or fee for them is a fair housing violation. This is an area worth being careful about. HUD's guidance on assistance animals is a useful reference.

Collecting Last Month's Rent: Proceed Carefully

Some landlords collect first and last month's rent upfront at move-in. This is legal in Idaho, but it comes with some nuances worth understanding.

If last month's rent is collected as a separate prepaid rent payment, it's not a security deposit — it's rent paid in advance. It should be labeled clearly as such in the lease. The challenge arises if a tenant vacates early: is that prepaid rent a credit against the final month, or does it create a more complicated accounting situation?

If last month's rent is treated informally — lumped in with a deposit, not clearly documented — it can create confusion at move-out about what can and can't be deducted. Clear lease language and separate line items in your accounting prevent this.

How to Hold the Deposit

Idaho law does not require owners to hold security deposits in a separate trust or escrow account (unlike some states). However, it's good practice to keep deposit funds separate from operating funds. Commingling deposits with your regular bank account can create accounting confusion at move-out and makes it harder to document that funds were properly available for return.

Third-party managers are required to hold these deposits in a separate account at a federally insured financial institution, separate from that manager's operating account. At Bluebird, we maintain clear separation between security deposit funds and operating accounts, which makes the accounting at move-out clean and auditable.

The Return Timeline: 21 Days Default, 30 Days Maximum

Under Idaho Code § 6-321, the timeline works as follows:

• 21 days is the default return deadline when the lease doesn't specify a timeframe.
• The lease can extend this up to 30 days — so if your lease specifies 30 days, that's enforceable.
• 30 days is the absolute hard ceiling — no lease provision can extend the return period beyond 30 days.

The statute reads: "Refunds shall be made within twenty-one (21) days if no time is fixed by agreement and, in any event, within thirty (30) days after surrender of the premises by the tenant."

The practical implication: if your lease is silent on the return timeline, you have 21 days. If your lease specifies a longer period — up to 30 days — you have that time. But 30 days is the maximum under any circumstances, regardless of what the lease says.

At Bluebird, we target returning deposits as quickly as possible after move-out — well within the statutory window. Holding a deposit longer than necessary without good reason creates unnecessary friction and doesn't serve anyone well.

The clock starts when the tenant vacates AND returns possession — meaning keys have been returned and the unit is accessible. If a tenant leaves belongings behind or delays returning keys, the clock may not start until those issues are resolved.

What You Can Deduct From the Deposit

Idaho law allows security deposit deductions for:

• Unpaid rent.
• Damage beyond normal wear and tear — this is the most contested area (see our dedicated post on wear and tear vs. damage for a full breakdown).
• Cleaning costs — if the unit requires cleaning.
• Other lease violations — if the lease specifies that certain violations carry financial consequences.

What you cannot deduct:

• Normal wear and tear — Idaho law explicitly prohibits this under Idaho Code § 6-321.
• Pre-existing damage — which is exactly why move-in documentation matters so much.

The Itemized Statement: Get This Right

If you make any deductions, Idaho law requires a signed, written, itemized statement explaining what was deducted and why, sent alongside the remaining deposit funds.

Vague line items don't hold up. "Cleaning — $250" is not sufficient. "Professional carpet cleaning required due to pet staining throughout living room and hallway — $275 (receipt attached)" is.

The itemized statement should:

• List each deduction and expenditure separately.
• Describe the reason for each charge clearly.
• Include supporting documentation (receipts, invoices, photos).
• Be accompanied by the remaining deposit balance.

If you withhold the entire deposit, you still need the written itemization explaining the deductions. Silence is not an option.

What Happens If You Miss the Deadline or Get It Wrong

This is where landlords who handle deposits informally often get into serious trouble.

Under Idaho law, a landlord who wrongfully withholds a security deposit — including by failing to return it or provide an itemized statement within the required timeframe — may be liable for the full deposit amount plus damages. In some cases, courts have awarded tenants their full deposit even when legitimate deductions existed, simply because the landlord failed to follow the procedural requirements.

The law doesn't just reward correctness — it penalizes procedural failures. A landlord who is absolutely right about a $600 cleaning charge but misses the return deadline may still owe the tenant the full deposit.

The Connection Between Deposits and Documentation

A security deposit is only as defensible as your documentation. Without a thorough move-in condition report showing the property's state at the start of the tenancy, any deduction you make at move-out is potentially disputable.

At Bluebird, every tenancy begins with a complete photo-documented inspection report — every room, every surface, every appliance. That report is shared with the tenant, who has two weeks to note any discrepancies. The same format is used at move-out, creating a direct before-and-after comparison.

This process is the reason security deposit disputes at properties we manage are rare to the point of being nearly nonexistent.

→ Read our full guide on move-in and move-out inspections

Managing This Well Requires Process, Not Just Good Intentions

Landlords who handle security deposits informally — collecting them without clear lease language, holding them in regular accounts, and returning them without proper itemization — often have good intentions. The problem is that good intentions don't substitute for proper process when a dispute ends up in small claims court.

A professional property management company handles the entire security deposit lifecycle — collection, documentation, accounting, deductions, and return — within a clear, legally compliant framework. It's one of the areas where having the right process in place genuinely protects owners from avoidable liability.

→ Learn about Bluebird's property management services → Contact Bluebird to discuss managing your Boise rental

Disclaimer: This blog post is for general informational purposes only and does not constitute legal, financial, tax, real estate, or investment advice. Because laws, regulations, and market conditions change and each situation is unique, you should consult a qualified professional before making any decisions based on this content. Bluebird Property Management makes no guarantee as to the accuracy, completeness, or applicability of the information provided.