Idaho Late Fee Calculator

No cap no late fee section in the law we read
Rent limit
None in Idaho Code §§ 6-301 to 6-324
Earliest fee day
–
Statute
Idaho Code §§ 6-301 to 6-324
Checked
What was not paid on time. Copies the rent until you type here.
How the lease sets the late fee
How many days the lease gives before a late fee; 0 if none.

Your late fee

$62.50

Paid 12 days late; the lease has no grace period.

Days past due
12 days
Grace period ends
No grace period
Earliest fee date
October 20, 2026
Lease late fee
5% of $1,250.00 = $62.50
Rent + late fee
$1,312.50

Idaho: Idaho Code §§ 6-301 to 6-324 contains no late fee provision, so there is no legal cap or waiting period to apply; only your lease terms count.

Late rent notice builder

12% legal default rate (contract silent)
Max written B2B rate
No cap — the finance-charge rate is whatever the parties agree (Idaho Credit Code consumer rules don't reach business credit).
Cap regime
No statutory cap
Statute
Idaho Code §§ 28-22-104, 28-42-201
Verified
— how we verify · changelog

Legal rate absent a written rate; fixed-sum invoices accrue from the due date; open accounts start 3 months after the last item.

Pre-filled with Idaho's statutory default (12%), which governs only when the contract names no rate; a rate stated in your contract replaces it.

Interest at 12% a year

Interest owed on an overdue invoice in Idaho at 12% per year
Invoice amount30 days late60 days late90 days late
$1,000.00$9.86$19.73$29.59
$5,000.00$49.32$98.63$147.95
$10,000.00$98.63$197.26$295.89

Maximum late fee in Idaho — written B2B contracts

No statutory cap

Basis: Idaho Code §§ 28-42-201, 28-41-301.

About this page

Idaho rent late fee law

Idaho Code Title 6, chapter 3, where Idaho's landlord and tenant rules sit, contains no late fee provision, so it neither caps a late rent fee nor gives a grace period.

Read in full for this check: Idaho Code, Title 6, chapter 3 (Forcible Entry and Unlawful Detainer, with the landlord and tenant sections 6-320 to 6-324), and Title 55, chapter 2 (Estates in Real Property). Official source, read from the copy archived on 2025-05-30 · checked .

Before you send the late rent notice: it is a reminder letter about overdue rent and a late charge, not an eviction notice. A notice to pay rent or quit is a separate document, and Idaho has its own rules for it. Nothing on this page is legal advice.

What Idaho law says about invoice interest

(1) When there is no express contract in writing fixing a different rate of interest, interest is allowed at the rate of twelve cents (12¢) on the hundred by the year on: [...] 2. Money after the same becomes due. [...] 6. Money due upon open accounts after three (3) months from the date of the last item.
— Idaho Code § 28-22-104(1). Read it at the official source · row verified 2026-08-19.

No usury cap; the finance-charge rate is whatever the parties agree. Idaho Credit Code rate limits reach only consumer credit, not business debts.

Not legal advice. Figures were last verified on the date shown; check the cited statute before charging a late fee.