Idaho Tax Deduction Checklist — 2026

Maximize your tax savings with our comprehensive checklist of tax deductions available to self-employed individuals.

Quick Idaho Tax Estimate

Based on Idaho's tax rates for 2026. Enter your details for a personalized calculation.

State Tax on $80K Profit
$0
SE Tax
$11,303.64
Effective Rate
20.2%
Marginal Rate
12%
Full Idaho Tax Calculator →

Idaho Tax Information

State Income TaxYes
Sales Tax0%
LLC Filing Fee$0
Annual Report Fee$None
Standard DeductionN/A

Self-employed pay both federal and Idaho state tax.

Idaho Quarterly Tax Deadlines

Q1
Apr 15
Q2
Jun 16
Q3
Sep 15
Q4
Jan 15

Frequently Asked Questions

What is the biggest deduction for self-employed in Idaho?
The self-employment tax deduction (50% of SE tax), health insurance premiums, and retirement contributions are typically the largest. The QBI deduction (20% of qualified business income) can also be substantial.
Can I deduct my home office in Idaho?
Yes, if used regularly and exclusively for business. Simplified method: $5/sq ft up to 300 sq ft (max $1,500). Regular method: actual expenses prorated by square footage percentage.
What vehicle expenses can I deduct in Idaho?
Standard mileage rate: $0.70/mile for 2026. Or actual expenses (gas, insurance, repairs, depreciation) prorated by business use %. Track all business miles with a log or app.
Are health insurance premiums deductible in Idaho?
Yes. Self-employed individuals can deduct 100% of health, dental, and long-term care insurance premiums for themselves, spouse, and dependents. This is an above-the-line deduction.
What can't I deduct as self-employed in Idaho?
Non-deductible: personal expenses, commuting to your regular workplace, clothing wearable outside work (unless uniforms), entertainment, political contributions, and fines/penalties.