Idaho Filing Requirements
Individuals, corporations, estates, trusts, and affected business entities (ABEs) in Idaho must meet specific filing requirements based on their income, residency status, and business activities. Below are the key filing thresholds and requirements for each category.
Individuals
- Idaho Residents: Must file if they have Idaho source gross income of more than $2,500. Residents are taxed on all income from pass-through entities, even if the entity apportions income between Idaho and other states.
- Part-Year Residents and Nonresidents: Must file if they have Idaho source gross income of more than $2,500. They are required to report income earned in Idaho during their period of residency or presence in the state.
Pass-Through Entities
- Partnerships and S Corporations: Must file if they are transacting business in Idaho.
- Estate: Must file if gross income is $600 or more.
- Trust: Must file if gross income is $100 or more.
Additional Notes
- Individuals must use Form 40 for full-year residents and Form 43 for part-year residents or nonresidents.
- Form ID K-1 is used to report a partner’s, shareholder’s, or beneficiary’s share of Idaho adjustments, credits, etc., for pass-through entities.
- All forms must be filed for the tax year beginning in 2025 or a fiscal year that begins in 2025.
Source:
Form 40 - Individual Income Tax Return
Form 43 - Part-Year Resident and Non-resident Income Tax Return
Form ID K-1 - Partner’s, Shareholder’s, or Beneficiary’s Share of Idaho Adjustments, Credits, etc.
Disclaimer: Always verify with the official Federal or State Department of Revenue Forms and Instructions for the most accurate and up-to-date information.