Flat-Fee Tax Preparation for Idaho Residents

Idaho has a flat income tax rate of 5.8% — reduced from a tiered system under recent rate-cut legislation

Idaho generally conforms to federal depreciation including bonus depreciation, benefiting real estate investors and business owners with capital assets

ID offers a capital gains deduction of 60% of net long-term capital gains from the sale of Idaho assets — a significant benefit for real estate investors selling ID property

Idaho has a pass-through entity tax option for S-corps and partnerships to elect entity-level taxation for potential SALT cap relief

ID does not impose a franchise tax on LLCs or S-corporations — a favorable aspect of ID's business tax environment

Idaho real estate transfer tax is minimal — $1 per $1,000 of value — one of the lowest in the nation

Boise and surrounding Treasure Valley have seen explosive population and real estate growth, creating significant capital gains planning needs for long-term property owners

Idaho does not impose a state estate tax, making it favorable for wealth transfer planning

Idaho Real Estate Tax

Idaho's Boise metro has been one of the fastest-growing real estate markets in the US, driven by migration from California and other high-tax states. The 60% capital gains deduction on Idaho assets is a significant benefit for investors selling ID real property. Federal depreciation conformity allows cost segregation studies to work efficiently for ID investment properties.

Idaho Business Tax

Idaho's flat income tax, no franchise tax, and low cost of doing business make it attractive for business owners relocating from higher-tax western states. The pass-through entity tax election provides SALT cap relief. Idaho's sales tax (6%) applies to tangible goods and some services, creating compliance obligations for product-based businesses.

Do I need to file an Idaho state tax return?

If you are an Idaho resident or earned ID-source income above the filing threshold, you must file an ID return. Idaho taxes residents on worldwide income at the flat 5.8% rate. Part-year residents file on income earned during the period of ID residency plus ID-source income earned as a non-resident.

What is Idaho's capital gains deduction?

Idaho allows taxpayers to deduct 60% of net long-term capital gains from the sale of Idaho-located assets from their ID taxable income. This means that if you sell an Idaho rental property with a $100,000 long-term gain, only $40,000 is subject to Idaho income tax. Combined with the flat 5.8% rate, this creates an effective ID rate of about 2.32% on long-term gains from ID assets.

What makes Idaho taxes unique?

Idaho's combination of a flat 5.8% rate, the 60% capital gains deduction on ID assets, no franchise tax, minimal real estate transfer tax, and no estate tax makes it one of the more favorable western states for investors and business owners. The strong population growth in the Treasure Valley has created significant planning opportunities for long-time ID real estate owners.

Does Idaho have a pass-through entity tax?

Yes. Idaho offers a pass-through entity tax election allowing eligible S-corps and partnerships to pay ID income tax at the entity level. This election can provide federal SALT cap relief for ID business owners subject to the $10,000 SALT limitation. The election mechanics and eligibility requirements should be reviewed annually with your tax preparer.