Is there a legal limit on late fees in Idaho?

No statutory cap (see reasonableness standard and notes). Idaho applies a statutory reasonableness rule: every fee imposed on a residential tenant, late-payment fees included, must be reasonable (Idaho Code § 55-305(1), enacted 2023). There is no numeric cap and no safe harbor.

Does a late fee have to be written into the lease in Idaho?

Yes — in Idaho a late fee must be stated in the lease.

Can a landlord charge a daily late fee in Idaho?

No statute addresses daily late fees directly. A daily fee would have to be reasonable under § 55-305(1) and stated in the rental agreement under § 55-305(2).

What late fees can a landlord charge in Idaho?

Verified July 11, 2026 All Idaho topics →

Idaho has no numeric cap on late fees, but since July 1, 2023 state law requires every fee charged to a residential tenant — late-payment fees included — to be reasonable, and bars landlords from charging any fee, fine, assessment, or interest that exceeds what the rental agreement states or that is not in the agreement at all (Idaho Code § 55-305).

Cited to Idaho Code § 55-305 (1)-(4) and 2 more Idaho statutes · Verified July 11, 2026

Under a written lease, a fee can only be changed with 30 days' written notice; oral agreements are exempt from the in-writing requirement. The statute applies to rental agreements entered into or renewed on or after July 1, 2023, and it expressly does not limit the amount of rent itself. Idaho mandates no grace period — the lease governs when rent is due and what lateness costs.

Idaho late fees at a glance

Statutory cap	No statutory cap (see reasonableness standard and notes)
Mandatory grace period	None mandated statewide
Must be in the lease	Yes
Daily fees	No statute addresses daily late fees directly. A daily fee would have to be reasonable under § 55-305(1) and stated in the rental agreement under § 55-305(2).
Reasonableness standard	Idaho applies a statutory reasonableness rule: every fee imposed on a residential tenant, late-payment fees included, must be reasonable (Idaho Code § 55-305(1), enacted 2023). There is no numeric cap and no safe harbor. The statutory words are 'Any fees imposed on a residential tenant, including fees for the late payment of rent, shall be reasonable.' No Idaho appellate case law fixes a formula for what counts as reasonable.

Cite this page: "Landlord Atlas, Idaho Late Fee Laws (verified July 11, 2026), landlordatlas.com/laws/late-fees/idaho/" — free to cite and quote with a link (how these records are verified). Every figure above is cited to the Idaho statute in the citations section below.

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Notes and caveats

Applicability trap: older never-renewed leases are outside the statute — § 55-305(3) limits the statute to rental agreements entered into or renewed on or after July 1, 2023 — a lease signed before then and never renewed is outside it.
'Idaho has no late-fee law' is stale — True only before S.B. 1039 (2023 ch. 67, § 1, p. 228, signed Mar. 20, 2023), which enacted the reasonableness and must-be-in-agreement rules.
Enacted as § 55-314, now § 55-305 — S.B. 1043 (2025 ch. 65, § 14, eff. 7/1/2025) redesignated the fee statute — pre-2025 citations use the old number.
No numeric cap — reasonableness plus the in-agreement rule — The binding limits are § 55-305(1)'s reasonableness standard and § 55-305(2)'s rule that fees must be in the agreement — for written agreements; § 55-305(2)(b)(i) exempts oral agreements from the in-writing requirement.
No grace period — and the 3-day notice isn't one — Neither Title 6, ch. 3 nor Title 55, chs. 2-3 mandates a grace period. The 3-day pay-or-quit notice of § 6-303(2) is eviction procedure, not a fee grace period.
A dead bill to avoid citing — 2025 S.B. 1042 (rental APPLICATION fee limits) passed the Senate but died in the House Business Committee (last action Feb. 20, 2025) — it is not law.

Common questions: Idaho late fees

Each answer is the verified value from the table above, restated as a direct answer. Free to quote with a link to this page.

Is there a legal limit on late fees in Idaho?: No statutory cap (see reasonableness standard and notes). Idaho applies a statutory reasonableness rule: every fee imposed on a residential tenant, late-payment fees included, must be reasonable (Idaho Code § 55-305(1), enacted 2023). There is no numeric cap and no safe harbor.
Is there a grace period before rent is late in Idaho?: None mandated statewide.
Does a late fee have to be written into the lease in Idaho?: Yes — in Idaho a late fee must be stated in the lease.
Can a landlord charge a daily late fee in Idaho?: No statute addresses daily late fees directly. A daily fee would have to be reasonable under § 55-305(1) and stated in the rental agreement under § 55-305(2).

Statute citations

Idaho Code § 55-305 (1)-(4) (verified 2026) Official source
S.B. 1039, 2023 Idaho Sess. Laws ch. 67 (enacted the fee-limitation statute as § 55-314) sec. 1 (verified 2026) Official source
Idaho Office of the Attorney General, Landlord and Tenant Manual (July 2026) (verified 2026) Official source

How this record was verified: Direct read of statute text on legislature.idaho.gov (official HTML section pages), double-read against the official chapter PDFs (T6CH3.pdf, T55CH3.pdf, T55CH2.pdf) and the enrolled session laws S1043 (2025 ch. 65 recodification), H0594 (2020 ch. 254), H0545 (2024 ch. 257); Idaho Attorney General Landlord and Tenant Manual used as official agency confirmation of verified negatives (July 2025 edition at the original pass; on 2026-08-12 the citations were repointed to the July 2026 edition after confirming the relied-on guidance — deposits/rent refundability framing, entry-rights lease-drafting advice, late-fee coverage — is unchanged); FindLaw mirror used only to reconcile pre-2025 section numbering.