Idaho late fee laws for rent: reasonable, agreed and noticed
Idaho does not set a dollar or percentage cap on late fees. Idaho Code 55-305 requires every fee charged to a residential tenant, late fees included, to be reasonable, and it bars any fee that is above or outside the rental agreement.
What does Idaho Code 55-305 say?
The section is titled "limitation on fees for tenants of a rental property." Subsection (1) says any fees imposed on a residential tenant, "including fees for the late payment of rent, shall be reasonable." Subsection (2) says an owner may not charge a fee, fine, assessment, interest or other cost in an amount greater than the rental agreement says, or that is not in the rental agreement at all.
There is no list of amounts. Reasonable is the standard, and the statute does not define it. A fee that is modest next to the rent and written plainly in the lease is the easier one to defend.
Can you add or raise a fee after the lease is signed?
Subsection (2)(b) gives two exceptions to the rule that a fee must be in the agreement. If the rental agreement is oral, a fee outside it is not barred by that subsection. If the agreement is written, the owner can change the fee, fine, assessment, interest or other cost by giving the tenant a written 30-day notice of the change.
Example a made-up owner in Boise has a written lease at $1,500 with a $50 late fee. The owner decides $75 is more reasonable for the current market. Under 55-305(2)(b)(ii) the owner gives a written 30-day notice of the change. Until those 30 days pass, the fee stays at $50, because the written lease is what the tenant agreed to.
Which leases does the rule cover?
Subsection (3) says the section applies to rental agreements entered into or renewed on or after July 1, 2023. A lease renewed before that date is outside it until its next renewal. Subsection (4) adds that nothing in the section limits the amount that can be charged for rent. The history note shows the section was amended in 2025.
How do you write an Idaho late fee clause?
- State the amount as a dollar figure and say when it applies.
- Keep the fee in proportion to the rent and to your real cost of chasing a payment.
- Send the 30-day written notice before any change takes effect, and keep proof of delivery.
- Post the fee on its own ledger line, separate from rent, so the tenant and you can see exactly what it is.
If rent stays unpaid, the late fee is only one part of the picture. Idaho has its own notice steps for ending a tenancy for nonpayment, covered in our guide to how to evict a tenant in Idaho.
Where do Idaho owners go wrong?
The most common slip is a late fee that lives only in a text message or a house rules page. Subsection (2) ties the fee to the rental agreement, so a charge that never appeared in the lease or a proper change notice is the one most likely to be refused.
A second slip is raising the fee at renewal without telling anyone. A renewal is a new agreement for the purposes of subsection (3), so put the current fee in the renewal paperwork itself and keep a signed copy. A third is stacking several small fees for one missed payment, which makes the total harder to call reasonable. One fee, one amount, one ledger line keeps the record simple for you and for the tenant.
How DoorKeeping handles it in Idaho
DoorKeeping posts the late fee you approved from your lease, as its own line apart from rent, and sends the tenant a reminder first. Rent and payments stay in your own bank accounts. DoorKeeping never holds your money and sends a payment only when you approve it. This is general information, not legal advice. Confirm the wording and any change notice with your own Idaho attorney.
Sources
Questions
- Is there a maximum late fee in Idaho?
- Idaho Code 55-305 names no dollar or percentage cap. It requires fees, including late fees, to be reasonable and not above what the rental agreement states.
- Can an Idaho landlord raise the late fee mid-lease?
- For a written agreement, the owner can change a fee by giving the tenant a written 30-day notice of the change under 55-305(2)(b)(ii).
- Does the Idaho fee rule apply to old leases?
- It applies to rental agreements entered into or renewed on or after July 1, 2023, per subsection (3).