SCorpDesk / 2026 S-Corp & QBI Guides / Wisconsin (WI) 2026 S-Corp Tax Calculator, PTET Election & Franchise Tax Guide
Wisconsin (WI) 2026 S-Corp Tax Calculator, PTET Election & Franchise Tax Guide
What are the 2026 S-Corp tax and PTET rules in Wisconsin?
In Wisconsin (WI), the 2026 S-Corporation election rule is: Recognizes Federal Form 2553 (Form 5S). For the Pass-Through Entity Tax (PTET) deduction: 7.90% Wisconsin Entity-Level Tax Election. Entity-level franchise/minimum tax: Economic Development Surcharge if Gross Receipts >= $4M.
In Wisconsin (WI), the 2026 S-Corporation election rule is: Recognizes Federal Form 2553 (Form 5S). For the Pass-Through Entity Tax (PTET) deduction: 7.90% Wisconsin Entity-Level Tax Election. Entity-level franchise/minimum tax: Economic Development Surcharge if Gross Receipts >= $4M.
Open Wisconsin 2026 S-Corp & 20% Permanent QBI Calculator
2026 Wisconsin (WI) S-Corporation Statutory Tax Matrix
| Wisconsin S-Corp Compliance Area | 2026 Statutory Rule |
|---|---|
| State S-Corp Election Recognition | Recognizes Federal Form 2553 (Form 5S) |
| Pass-Through Entity Tax (PTET) Election | 7.90% Wisconsin Entity-Level Tax Election |
| Annual Minimum / Franchise Tax | Economic Development Surcharge if Gross Receipts >= $4M |
| Federal Section 199A QBI Deduction | Up to 23% of qualified K-1 income under Public Law 119-21 |
| Home Office & Mileage Deduction Method | Must use an IRC Section 62(c) Corporate Accountable Plan |
Frequently Asked Questions
Does Wisconsin require a separate state S-Corp election in 2026?
For Wisconsin (WI): Recognizes Federal Form 2553 (Form 5S).
What is the Wisconsin S-Corp franchise or minimum tax for 2026?
In Wisconsin: Economic Development Surcharge if Gross Receipts >= $4M.