Wisconsin State Tax Guide for Businesses & Individuals 2026
Wisconsin imposes a full suite of state taxes on businesses and individuals, including a graduated corporate income tax, a progressive individual income tax, and a 5% state sales tax. This guide covers every major Wisconsin tax obligation for 2026, from nexus rules and filing deadlines to credits, incentives, and registration requirements.
Quick Reference: Wisconsin Tax Rates at a Glance
| Tax Type | Rate / Range |
|---|
| State Corporate Income Tax | 7.9% flat rate |
| State Individual Income Tax | 3.50% – 7.65% (4 brackets) |
| State Sales Tax Base Rate | 5.0% |
| Average Combined Sales Tax | ~5.43% (state + local) |
| SUI/SUTA Rate Range | 0.0% – 12.0%; New employer: 3.05% |
| Effective Property Tax Rate | ~1.51% (average) |
| Estate / Inheritance Tax | No estate or inheritance tax |
1. Wisconsin Business Tax Nexus
What is Tax Nexus in Wisconsin?
Nexus is the minimum connection a business must have with Wisconsin before the state can require it to collect and remit taxes. Wisconsin enforces both physical and economic nexus standards for sales tax and income tax purposes.
Physical Nexus
- Maintaining an office, store, or warehouse in Wisconsin
- Having employees, agents, or contractors operating in Wisconsin
- Storing inventory in Wisconsin (including FBA fulfillment centers)
- Operating vehicles or equipment within the state
- Performing services or installation work in Wisconsin
Economic Nexus (Remote Sellers)
| Threshold Type | Amount |
|---|
| Sales Threshold | $100,000 in gross sales |
| Transaction Count Threshold | 200 or more separate transactions |
| Effective Date | October 1, 2018 |
Click-Through & Affiliate Nexus
Wisconsin enforces click-through nexus for remote sellers that enter into agreements with in-state residents who refer customers via links. Affiliate nexus applies where a Wisconsin-based affiliate operates under the same or similar trade name. No specific dollar threshold is required for affiliate nexus to apply.
2. Wisconsin State Income Tax
Corporate Income Tax
| Taxable Income | Tax Rate |
|---|
| All taxable income | 7.9% (flat rate) |
- Apportionment Formula: Single sales factor (receipts factor only)
- Combined/Unitary Reporting: Wisconsin requires combined reporting for unitary business groups
- Minimum Franchise Tax: $25 minimum franchise tax applies to all corporations
Individual Income Tax
| Filing Status | Taxable Income | Tax Rate |
|---|
| Single / MFS | $0 – $13,810 | 3.50% |
| Single / MFS | $13,811 – $27,630 | 4.40% |
| Single / MFS | $27,631 – $304,170 | 5.30% |
| Single / MFS | Over $304,170 | 7.65% |
| Married Filing Jointly | $0 – $18,420 | 3.50% |
| Married Filing Jointly | $18,421 – $36,840 | 4.40% |
| Married Filing Jointly | $36,841 – $405,550 | 5.30% |
| Married Filing Jointly | Over $405,550 | 7.65% |
- Standard Deduction (Single): $12,400 (phases out at higher incomes)
- Standard Deduction (MFJ): $22,610 (phases out at higher incomes)
- Personal Exemption: $700 per taxpayer and dependent
- Federal Conformity: Wisconsin uses static conformity, currently conforming to the IRC as of December 31, 2020; some federal provisions are decoupled
Filing Deadlines
| Return Type | Due Date |
|---|
| Corporate Return (Form 4) | 15th day of 4th month after tax year end (April 15 for calendar year) |
| Individual Return (Form 1) | April 15, 2026 |
| Extension Period | 6 months (to October 15 for individuals) |
| Estimated Payments (Q1) | April 15, 2026 |
| Estimated Payments (Q2) | June 16, 2026 |
| Estimated Payments (Q3) | September 15, 2026 |
| Estimated Payments (Q4) | January 15, 2027 |
3. Wisconsin Sales Tax
State Sales Tax Rate
Wisconsin's state sales tax rate is 5.0%. With local county taxes, the average combined rate is approximately 5.43%. Counties may impose an additional 0.5% sales tax.
Taxable vs. Exempt Goods & Services
| Category | Status | Notes |
|---|
| Tangible Personal Property | ✅ Taxable | All tangible goods are taxable unless specifically exempt |
| SaaS / Digital Products | ✅ Taxable | Prewritten software and digital goods are taxable; custom software exempt |
| Groceries / Food | ❌ Exempt | Unprepared food and grocery items are exempt from sales tax |
| Prescription Drugs | ❌ Exempt | Prescription drugs and medical devices are fully exempt |
| Clothing | ✅ Taxable | All clothing items are subject to sales tax; no exemption threshold |
| Manufacturing Equipment | ⚠️ Partial | Machinery used exclusively in manufacturing is exempt; tools and supplies may vary |
| Professional Services | ❌ Exempt | Most professional and personal services are not subject to sales tax |
Sales Tax Permits & Registration
- Registering Agency: Wisconsin Department of Revenue — www.revenue.wi.gov
- Cost to Register: No fee; registration is free
- Renewal Requirement: No periodic renewal required; permit remains active until cancelled
Filing Frequency & Deadlines
| Annual Tax Liability | Filing Frequency | Due Date |
|---|
| Less than $600 | Annually | January 31 following the tax year |
| $600 – $4,999 | Quarterly | Last day of the month following the quarter |
| $5,000 – $59,999 | Monthly | Last day of the following month |
| $60,000 or more | Monthly (prepayment required) | Last day of the following month |
Local Sales Tax Rates (Top 5 Counties)
| Jurisdiction | Local Rate | Combined Rate |
|---|
| Milwaukee County | 0.5% | 5.5% |
| Dane County (Madison) | 0.5% | 5.5% |
| Brown County (Green Bay) | 0.5% | 5.5% |
| Waukesha County | 0.5% | 5.5% |
| Racine County | 0.5% | 5.5% |
4. Wisconsin Payroll Tax & Compliance
Employer Payroll Tax Obligations
| Tax / Obligation | Rate / Details |
|---|
| State Income Tax Withholding | 3.50% – 7.65% based on employee earnings and W-4 |
| SUI/SUTA Rate Range | 0.0% – 12.0% on first $14,000 of wages |
| Taxable Wage Base (SUI) | $14,000 per employee per year |
| New Employer SUI Rate | 3.05% (non-construction); 3.05% (construction) |
| Workers' Compensation | Private insurance required; no state fund |
| Paid Family & Medical Leave | Not applicable; Wisconsin has no state PFML program |
| State Disability Insurance | Not applicable; no state SDI program |
Withholding Registration & Filing
- Registration Agency: Wisconsin Department of Revenue — www.revenue.wi.gov
- Filing Frequency: Determined by total withholding liability — monthly for most employers; semi-weekly for large employers (over $50,000 annually)
- Annual Reconciliation Deadline: January 31 (Form WT-7)
- New Hire Reporting Deadline: Within 20 days of hire date; report to Wisconsin New Hire Reporting Center
Minimum Wage
| Category | Rate (2026) |
|---|
| Standard Minimum Wage | $7.25 per hour (mirrors federal) |
| Tipped Employee Rate | $2.33 per hour (tip credit up to $4.92) |
| Youth / Opportunity Wage | $5.90 per hour (employees under 20, first 90 days) |
| Next Scheduled Increase | No scheduled increase as of 2026 |
5. Wisconsin Property Tax
- Assessment Ratio: 100% of fair market value (full value assessment)
- Effective Average Rate: ~1.51% (among the higher rates nationally)
- Assessment Cycle: Annual assessment; municipalities reassess regularly
- Appeal Deadline: Objections must be filed with the Board of Review; dates vary by municipality, typically May–June
Business Personal Property Tax
Wisconsin taxes business personal property including furniture, fixtures, machinery, equipment, and inventory. Businesses must file Form PA-003 (Statement of Assessment) with the local assessor by March 1 each year. Personal property with a total assessed value of $500 or less is exempt from taxation.
Homestead & Other Exemptions
| Exemption Type | Amount / Rate | Eligibility |
|---|
| Homestead Credit | Up to $1,168 credit | Wisconsin residents with household income under $24,680; income-based credit on income tax return |
| Senior / Elderly | Included in Homestead Credit | Age 62+ may qualify for additional homestead credit; income limitations apply |
| Veteran / Disabled | Up to $70,000 exemption on assessed value | Veterans with 100% service-connected disability; surviving spouses may also qualify |
| Agricultural Land | Preferential use-value assessment | Land actively used for agricultural purposes assessed at agricultural use value, not market value |
Property Tax Due Dates
| Installment | Due Date | Notes |
|---|
| Full Payment or First Installment | January 31 | Full payment or 50% due by January 31 |
| Second Installment | July 31 | Remaining 50% due to county treasurer |
| Early Payment Discount | None | No discount offered for early payment in Wisconsin |
6. Other Key Wisconsin Taxes
Franchise / Privilege Tax
Wisconsin imposes a franchise tax on corporations doing business in the state. The rate is 7.9% of net income, which is the same as the corporate income tax. The minimum franchise tax is $25. The franchise tax return is due on the 15th day of the 4th month after the close of the tax year.
Gross Receipts Tax
Wisconsin does not impose a standalone gross receipts tax. Business activity is taxed through the corporate income/franchise tax and the sales and use tax systems.
Excise Taxes
| Category | Rate |
|---|
| Gasoline | $0.329 per gallon |
| Diesel | $0.329 per gallon |
| Cigarettes | $2.52 per pack of 20 |
| Beer | $0.06 per gallon (barrel rate applies) |
| Wine | $0.25 per liter (table wine) |
| Cannabis | Not applicable; recreational cannabis is not legal in Wisconsin (2026) |
7. Wisconsin Tax Credits & Incentives
| Credit / Incentive | Value / Rate | Eligibility |
|---|
| Research & Development Credit | 5.75% of qualified R&D expenses (above base) | Corporations and pass-throughs with qualified research conducted in Wisconsin |
| Jobs Tax Credit (WEDC) | Up to $9,000 per new full-time job created | Businesses certified by WEDC creating new jobs; 3-year commitment required |
| Manufacturing & Agriculture Credit | 7.5% of qualified production income | Manufacturers and agricultural producers with Wisconsin-sourced production income |
| Enterprise Zone Tax Credit | Up to 7% of wages + capital investment | Businesses operating in state-designated enterprise zones; certified by WEDC |
| Historic Rehabilitation Credit | 20% of qualified rehabilitation expenditures | Certified historic structures undergoing substantial rehabilitation in Wisconsin |
| Angel Investment Credit | 25% of investment (up to $47,500 per investor) | Accredited investors in certified Wisconsin early-stage companies |
| Community Development Finance Credit | Various rates | Investments in certified community development finance institutions operating in Wisconsin |
8. How to Register a Business in Wisconsin
- Choose Your Business Structure: Select LLC, corporation, partnership, or sole proprietorship based on your liability, tax, and operational needs.
- Register with the Wisconsin Department of Financial Institutions (DFI): File Articles of Organization (LLC) or Articles of Incorporation (corporation) at www.wdfi.org. Filing fee is $130 (online) or $170 (paper) for LLCs; $100 for corporations.
- Obtain a Federal EIN: Apply for an Employer Identification Number through the IRS at www.irs.gov — required for hiring employees and opening business bank accounts.
- Register for State Tax Accounts: Register for Wisconsin sales tax, withholding tax, and corporate income tax through the Wisconsin Department of Revenue at www.revenue.wi.gov. Use the online Business Tax Registration system.
- Register for Unemployment Insurance: Register with the Wisconsin Department of Workforce Development (DWD) at dwd.wisconsin.gov to obtain a UI account number for payroll tax purposes.
- Obtain Required Licenses and Permits: Check with the Wisconsin Department of Safety and Professional Services (DSPS) at dsps.wi.gov for industry-specific licenses. Health, food service, construction, and professional service businesses have additional requirements.
- Register for a Local Business License: Contact your city or county clerk's office for local business licenses or permits. Requirements and fees vary by municipality.
9. Key Wisconsin Tax Agencies & Resources
| Agency | Responsibility | Website |
|---|
| Wisconsin Department of Revenue (DOR) | Corporate income tax, individual income tax, sales tax, withholding tax administration | www.revenue.wi.gov |
| Wisconsin Department of Workforce Development (DWD) | Unemployment insurance, new hire reporting, labor law compliance | dwd.wisconsin.gov |
| Wisconsin Department of Financial Institutions (DFI) | Business entity registration, corporate filings, licensing | www.wdfi.org |
| Wisconsin Tax Appeals Commission | Hearing and resolving disputes between taxpayers and the DOR | www.wisbar.org |
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Note: This guide is for informational purposes only and does not constitute legal or tax advice. Consult a licensed tax professional for advice specific to your situation.
