Wisconsin Tax Deduction Checklist — 2026

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

Quick Wisconsin Tax Estimate

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

State Tax on $80K Profit
$1,726.8
SE Tax
$11,303.64
Effective Rate
22.3%
Marginal Rate
12%
Full Wisconsin Tax Calculator →

Wisconsin Tax Information

State Income TaxYes
Top Marginal Rate8%
Sales Tax0%
LLC Filing Fee$0
Annual Report Fee$None
Standard DeductionN/A

Self-employed pay both federal and Wisconsin state tax.

Wisconsin Income Tax Brackets (2026)

Tax RateFromTo
3.5%$0$14,680
4.4%$14,680$50,480
5.3%$50,480$323,290
7.7%$323,290No limit

Wisconsin 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 Wisconsin?
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 Wisconsin?
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 Wisconsin?
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 Wisconsin?
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 Wisconsin?
Non-deductible: personal expenses, commuting to your regular workplace, clothing wearable outside work (unless uniforms), entertainment, political contributions, and fines/penalties.