Idaho Small Business Taxes: The Employer’s 2025 Guide

Idaho offers a vibrant environment for business, withover 207,000 small businesses employing 56% of the state’s workforce. Whether you’re an established business owner or planning to start a new venture, understanding the tax landscape in Idaho is crucial. This guide provides an overview of the various taxes small businesses in Idaho must navigate, including tax rates, filing requirements, and deadlines.

Types of Business Taxes in Idaho

Idaho business owners may be subject to various taxes depending on their business structure, activities, and revenue. Here’s a breakdown of the main types of taxes:

  1. Business Income Tax

    • Applicable Entities: C corporations, S corporations, and LLCs with C corp elections

    • Tax Rate: 5.3%

    • Filing Requirements: File Form 41 for C corporations or Form 41S for S corporations by the 15th day of the fourth month after the tax year ends.

    • Estimated Payments: Required for C corporations if liability is at least $500. Payments are due quarterly by April 15, June 15, September 15, and December 15.

  2. Affected Business Entity (ABE) Tax

    • Applicable Entities: Entities taxed as partnerships or S corporations

    • Tax Rate: 5.3%

    • Filing Requirements: File Form PTE-12 by the 15th day of the fourth month following the close of the tax year.

  3. Sales and Use Tax

    • Applicable Activities: Sales of physical products, digital products, and certain kinds of services

    • Tax Rate: 6% (local rates may apply)

    • Filing Requirements: File Form 850 monthly, quarterly, or annually based on sales volume.

  4. Withholding Tax

    • Applicable Entities: Employers with employees

    • Tax Rate: 5.3%

    • Filing Requirements: File Form 910 annually, quarterly, monthly, or semi-monthly.

  5. Unemployment Insurance Tax

    • Applicable Entities: Employers with employees

    • Tax Rate: Varies based on the business’s experience rating

    • Wage Base: $53,300 per employee per year

    • Filing Requirements: File quarterly reports (Form TX20/TX26) by April 30, July 31, October 31, and January 31.

  6. Personal Property Tax

    • Applicable Entities: Businesses using personal property

    • Tax Rate: Based on property type and value

    • Filing Requirements: Report annually to the county assessor by March 15.

  7. Nonresident Withholding Tax

    • Applicable Entities: Pass-through entities with nonresident members

    • Tax Rate: 5.3% on distributive share income

    • Filing Requirements: File Form PTE-01 by the 15th day of the fourth month following the close of the tax year.

How to File and Pay Idaho Business Taxes

Business taxes in Idaho can be filed and paid through various methods:

  • Online Filing and Payment: Use the Taxpayer Access Point (TAP) for electronic submissions and payments.

  • Mail: Send forms and payments to the address indicated (where applicable).

Important Deadlines

Keep track of these key dates to avoid penalties:

  • Business Income Tax Returns: Due by the 15th day of the fourth month after the tax year ends.

  • Estimated Tax Payments: Due quarterly by April 15, June 15, September 15, and December 15.

  • Sales and Use Tax Returns: Monthly, quarterly, or annual filing based on sales volume.

  • Withholding Tax Returns: Due annually, quarterly, monthly, or semi-monthly.

  • Unemployment Insurance Reports: Due quarterly by April 30, July 31, October 31, and January 31.

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Tax Credits and Incentives

Idaho offers several tax credits and incentives for small businesses, including:

  • Idaho Tax Reimbursement Incentive: This is available to new and existing Idaho businesses in various industries (including aerospace, agriculture, food processing, and high-tech) that create a minimum number of full-time jobs. It is worth up to 30% on income, payroll, and sales taxes for up to 15 years.

  • 3% Investment Tax Credit: This credit is available to all Idaho businesses. It is worth 3% of investments in new machinery and equipment used in the state, and it has a 14-year carryover or a two-year exemption from all personal property taxes.

  • Idaho Business Advantage: This is available to businesses that invest at least $500,000 in new facilities and create at least 10 jobs paying at least $40,000 annually with benefits. Benefits include a 3.75% Enhanced Investment Tax Credit, 2.5% Real Property Improvement Tax Credit, and 25% Sales and Use Tax Exemption.

  • Credit for Idaho Research Activities: This credit is available to eligible businesses that conduct qualified research in the state. It equals 5% of the excess of qualified research expenses over the base amount plus 5% of basic research payments.

For more information, read our article all about Idaho tax incentives for businesses.

Idaho’s business tax breakdown by business type

Business taxes can be complicated, so we’ve included a chart below that breaks down the taxes that different business structures usually pay. 

Remember that pass-through entities don’t pay federal income taxes themselves—the obligation is passed on to their business owners or shareholders, who pay them through their personal income tax returns. 

Business type

Personal income tax

ABE tax

Corporate income tax

Sales and use tax

Withholding tax

Unemployment tax

Federal income taxes

C corporation

No 

No 

Yes

Yes, if applicable

Yes, if you hire employees

Yes, if you hire employees

Yes

S corporation

Yes (pass-through), if not making the ABE election

Yes, if it makes the election

Yes 

Yes, if applicable

Yes, if you hire employees

Yes, if you hire employees

Yes (pass-through)

LLC

Yes (pass-through), if not making the ABE election

Depends on how it’s structured

Depends on how it’s structured

Yes, if applicable

Yes, if you hire employees

Yes, if you hire employees

Yes (pass-through)

Partnership 

Yes (pass-through), if not making the ABE election

Yes, if it makes the election

No

Yes, if applicable

Yes, if you hire employees

Yes, if you hire employees

Yes (pass-through)

Sole proprietorship

Yes (pass-through)

No 

No

Yes, if applicable

Yes, if you hire employees

Yes, if you hire employees

Yes, by way of individual income tax

File your Idaho small business taxes with Gusto

As a business owner, your time and energy are valuable, finite resources. So, instead of managing your taxes manually, let Gusto give you a hand. Our easy-to-use software automatically files all your payroll taxes each time you run payroll—freeing up your bandwidth for the work that matters most. 

Learn how else Gusto can simplify the operations of your small business by creating an account today. 

Idaho Small Business Taxes: The Employer’s 2024 Guide

Idaho offers a vibrant environment for business, with about 189,000 small businesses employing 56% of the state’s workforce. Whether you’re an established business owner or planning to start a new venture, understanding the tax landscape in Idaho is crucial. This guide provides an overview of the various taxes small businesses in Idaho must navigate, including tax rates, filing requirements, and deadlines.

Gusto | Online Payroll Services, HR, and Benefits

Run payroll and benefits with Gusto

Types of Business Taxes in Idaho

Idaho business owners may be subject to various taxes depending on their business structure, activities, and revenue. Here’s a breakdown of the main types of taxes:

  1. Business Income Tax

    • Applicable Entities: C corporations, S corporations, and LLCs with C corp elections

    • Tax Rate: 5.695%

    • Filing Requirements: File Form 41 for C corporations or Form 41S for S corporations by the 15th day of the fourth month after the tax year ends.

    • Estimated Payments: Required for C corporations if liability is at least $500. Payments are due quarterly by April 15, June 15, September 15, and December 15.

  2. Affected Business Entity (ABE) Tax

    • Applicable Entities: Entities taxed as partnerships or S corporations

    • Tax Rate: 5.695%

    • Filing Requirements: File Form PTE-12 by the 15th day of the fourth month following the close of the tax year.

  3. Sales and Use Tax

    • Applicable Activities: Sales of physical products, digital products, and certain kinds of services

    • Tax Rate: 6% (local rates may apply)

    • Filing Requirements: File Form 850 monthly, quarterly, or annually based on sales volume.

  4. Withholding Tax

    • Applicable Entities: Employers with employees

    • Tax Rate: 5.695%

    • Filing Requirements: File Form 910 annually, quarterly, monthly, or semi-monthly.

  5. Unemployment Insurance Tax

    • Applicable Entities: Employers with employees

    • Tax Rate: Varies based on business’s experience rating

    • Wage Base: $53,500 per employee per year

    • Filing Requirements: File quarterly reports (Form TX20/TX26) by April 30, July 31, October 31, and January 31.

  6. Personal Property Tax

    • Applicable Entities: Businesses using personal property

    • Tax Rate: Based on property type and value

    • Filing Requirements: Report annually to the county assessor by March 15.

  7. Nonresident Withholding Tax

    • Applicable Entities: Pass-through entities with nonresident members

    • Tax Rate: 5.695% on distributive share income

    • Filing Requirements: File Form PTE-01 by the 15th day of the fourth month following the close of the tax year.

How to File and Pay Idaho Business Taxes

Business taxes in Idaho can be filed and paid through various methods:

  • Online Filing and Payment: Use the Taxpayer Access Point (TAP) for electronic submissions and payments.

  • Mail: Send forms and payments to the address indicated (where applicable).

Important Deadlines

Keep track of these key dates to avoid penalties:

  • Business Income Tax Returns: Due by the 15th day of the fourth month after the tax year ends.

  • Estimated Tax Payments: Due quarterly by April 15, June 15, September 15, and December 15.

  • Sales and Use Tax Returns: Monthly, quarterly, or annual filing based on sales volume.

  • Withholding Tax Returns: Due annually, quarterly, monthly, or semi-monthly.

  • Unemployment Insurance Reports: Due quarterly by April 30, July 31, October 31, and January 31.

Tax Credits and Incentives

Idaho offers several tax credits and incentives for small businesses, including:

  • Idaho Tax Reimbursement Incentive: This is available to new and existing Idaho businesses in various industries (including aerospace, agriculture, food processing, and high-tech) that create a minimum number of full-time jobs. It is worth up to 30% on income, payroll, and sales taxes for up to 15 years.

  • 3% Investment Tax Credit: This credit is available to all Idaho businesses. It is worth 3% of investments in new machinery and equipment used in the state, and it has a 14-year carryover or a two-year exemption from all personal property taxes.

  • Idaho Business Advantage: This is available to businesses that invest at least $500,000 in new facilities and create at least 10 jobs paying at least $40,000 annually with benefits. Benefits include a 3.75% Enhanced Investment Tax Credit, 2.5% Real Property Improvement Tax Credit, and 25% Sales and Use Tax Exemption.

  • Credit for Idaho Research Activities: This credit is available to eligible businesses that conduct qualified research in the state. It equals 5% of the excess of qualified research expenses over the base amount plus 5% of basic research payments.

For more information, read our article all about Idaho tax incentives for businesses.

Idaho’s business tax breakdown by business type

Business taxes can be complicated, so we’ve included a chart below that breaks down the taxes that different business structures usually pay. 

Remember that pass-through entities don’t pay federal income taxes themselves—the obligation is passed on to their business owners or shareholders, who pay them through their personal income tax returns. 

Business type

Personal income tax

ABE tax

Corporate income tax

Sales and use tax

Withholding tax

Unemployment tax

Federal income taxes

C corporation

No 

No 

Yes

Yes, if applicable

Yes, if you hire employees

Yes, if you hire employees

Yes

S corporation

Yes (pass-through), if not making the ABE election

Yes, if it makes the election

Yes 

Yes, if applicable

Yes, if you hire employees

Yes, if you hire employees

Yes (pass-through)

LLC

Yes (pass-through), if not making the ABE election

Depends on how it’s structured

Depends on how it’s structured

Yes, if applicable

Yes, if you hire employees

Yes, if you hire employees

Yes (pass-through)

Partnership 

Yes (pass-through), if not making the ABE election

Yes, if it makes the election

No

Yes, if applicable

Yes, if you hire employees

Yes, if you hire employees

Yes (pass-through)

Sole proprietorship

Yes (pass-through)

No 

No

Yes, if applicable

Yes, if you hire employees

Yes, if you hire employees

Yes, by way of individual income tax

File your Idaho small business taxes with Gusto

As a business owner, your time and energy are valuable, finite resources. So, instead of managing your taxes manually, let Gusto give you a hand. Our easy-to-use software automatically files all your payroll taxes each time you run payroll—freeing up your bandwidth for the work that matters most. 

Learn how else Gusto can simplify the operations of your small business by creating an account today. 

Feli Oliveros

Feli Oliveros

Feli Oliveros is a freelance finance and business writer with experience covering personal and small business finance. In 2015 she graduated from UCLA, where she earned her bachelor’s degree in English and minored in Anthropology.