Updated September 5, 2026. Quick answer: For an Idaho HOA, if the governing documents don’t already say how assessments get approved, state law defaults to requiring “the approval of a majority of the members of the homeowner’s association,” and unincorporated associations must adopt a bylaw stating that “no fees or assessments… may be increased unless a majority of all members… vote in favor of the increase.” Idaho’s much older Condominium Property Act, by contrast, sets no assessment-vote threshold at all and just requires the bylaws to spell out the process.
Key statute: Idaho Code § 55-3201 et seq. (Homeowner’s Association Act, 2022) for subdivision/planned-community HOAs; Idaho Code § 55-1501 et seq. (Condominium Property Act, 1965) for condominiums
How Idaho lets an association approve it
Idaho Code § 55-3204(3)(d) requires all homeowner’s associations to “[d]etermine and establish the amount of assessments in accordance with the governing documents or, in the event the governing documents do not include such language, with the approval of a majority of the members of the homeowner’s association.” For unincorporated associations specifically, § 55-3204(7)(e) requires bylaws containing “A provision that no fees or assessments of the homeowner’s association may be increased unless a majority of all members of the homeowner’s association vote in favor of the increase.” Idaho’s separate Condominium Property Act instead just requires the bylaws to state the “Method of estimating the amount of the annual budget, and the manner of assessing and collecting from the unit owners their respective shares” (§ 55-1507); no statutory vote threshold is set for condo special assessments at all.
The notice you’re owed
Idaho’s HOA Act does not have a special-assessment-specific notice statute; its only 30-day notice rule (§ 55-3206) applies to board-imposed fines, not assessments. General meeting notice for HOAs is instead handled by cross-reference: § 55-3204(3)(b) says associations must “Be governed by the provisions of sections 30-30-501 and 30-30-505, Idaho Code, as those provisions relate to notice of meetings.” We did not independently read those nonprofit-corporation-act sections this session. The Condominium Property Act contains no statutory notice period for assessments either; it leaves that to the bylaws’ “Method of calling meetings” requirement (§ 55-1507).
Paying it: plan, interest, and late fees
Neither Idaho act sets a statutory interest rate, late-fee cap, or installment-payment right for special assessments. The HOA lien statute, § 55-3207, describes how a lien is filed and enforced but contains no interest or late-fee language. The Condominium Property Act’s lien statute, § 55-1518, allows a lien to include “interest, costs (including attorney’s fees), and penalties”, but only as the declaration or board sets them; the statute itself imposes no rate or cap.
HOA: § 55-3207 lets an association file and record a lien for unpaid maintenance assessments, requires it to serve the owner “by personal delivery… or by certified mail… within five (5) business days after recording,” and expressly allows “taking a deed in lieu of foreclosure” as an alternative to foreclosing. Condo: § 55-1518 says an assessment lien “shall expire and be of no further force or effect one (1) year from the date of recordation,” extendable by the management body “for not to exceed one (1) additional year.”
Does Idaho require a reserve study?
No. Neither the 2022 Homeowner’s Association Act (Ch. 32) nor the Condominium Property Act (Ch. 15) contains any reserve-study or reserve-funding requirement in the sections we reviewed.
Honest gaps
Idaho’s HOA Act (subdivision associations) and its Condominium Property Act (condos) are two entirely separate statutes that diverge on almost every point above; the HOA Act has a real default majority-vote rule for assessments and the condo act does not, so we deliberately kept them separate rather than picking one as “the” Idaho answer. We did not independently read Idaho Code §§ 30-30-501/30-30-505 (the nonprofit-corporation-act notice sections cross-referenced by § 55-3204), so we cannot state the exact notice period those sections impose. We also did not review the entire HOA Act (§§ 55-3201 through 3213) or condo act line by line, so a related requirement elsewhere in either chapter cannot be fully ruled out.
Source note. Read from https://legislature.idaho.gov/statutesrules/idstat/title55/t55ch32/sect55-3204/; https://legislature.idaho.gov/statutesrules/idstat/title55/t55ch32/sect55-3204A/; https://legislature.idaho.gov/statutesrules/idstat/title55/t55ch32/sect55-3206/; https://legislature.idaho.gov/statutesrules/idstat/title55/t55ch32/sect55-3207/; https://legislature.idaho.gov/statutesrules/idstat/title55/t55ch15/sect55-1518/; https://legislature.idaho.gov/statutesrules/idstat/title55/t55ch15/sect55-1507/ on September 5, 2026.
Related: HOA rules in a 55+ community · how a special-assessment foreclosure actually works · lump sum vs. a payment plan.
General information drawn from each state’s own statutes as read at its official legislature or code-publisher site (or a verbatim codified mirror where noted), not legal advice. Special-assessment law is state law, and every association’s own declaration and bylaws add rules on top of the statutory floor described here. We are not a law firm and this is not legal advice.