2026 Wisconsin State Income Tax Brackets — Married Filing Jointly
Complete bracket schedule, deductions, the unique Married Couple Credit, and federal interaction. Tax year 2026.
Updated April 2026 · Sources: Wisconsin Department of Revenue, IRS Rev. Proc. 2025-32
Wisconsin 2026 brackets — Married Filing Jointly
| Marginal rate | Income range | Tax on max |
|---|---|---|
| 3.50% | $0 – $18,420 | $645 |
| 4.40% | $18,421 – $36,840 | $1,455 |
| 5.30% | $36,841 – $405,550 | $20,997 |
| 7.65% | $405,551 – ∞ | continues at 7.65% |
Federal + Wisconsin combined burden (MFJ examples)
| Income | Federal MFJ | WI MFJ | Combined | Effective |
|---|---|---|---|---|
| $60,000 | $6,723 | $2,683 | $9,406 | 15.7% |
| $100,000 | $11,828 | $4,803 | $16,631 | 16.6% |
| $150,000 | $22,828 | $7,453 | $30,281 | 20.2% |
| $200,000 | $33,828 | $10,103 | $43,931 | 22.0% |
| $300,000 | $57,694 | $15,403 | $73,097 | 24.4% |
| $500,000 | $114,126 | $28,222 | $142,348 | 28.5% |
Approximations: federal MFJ standard deduction applied; Wisconsin standard deduction phase-out applied at higher incomes; no credits other than implicit. Use the Wisconsin tax calculator for exact numbers including Married Couple Credit, school property tax credit, etc.
Key Wisconsin-specific rules for MFJ
- Standard deduction phases OUT at higher income — unlike most states. Above ~$148k AGI, must itemize.
- Married Couple Credit offsets some marriage penalty (up to $480 credit).
- Social Security IS taxed in Wisconsin (one of 9 states still doing so).
- 529 contribution deduction — up to $4,440 per beneficiary, per spouse on MFJ.
- School Property Tax Credit — 12% of property tax up to $300.
Frequently asked questions
What are the 2026 Wisconsin income tax brackets for married filing jointly?▼
Wisconsin has 4 brackets for MFJ in 2026: 3.50% on income up to $18,420; 4.40% from $18,421 to $36,840; 5.30% from $36,841 to $405,550; and 7.65% on income above $405,550. State only — federal tax is separate.
What is Wisconsin's MFJ standard deduction for 2026?▼
Wisconsin's standard deduction phases OUT as income rises (rare among states). For 2026 MFJ, the maximum is approximately $24,490 at the lowest income, decreasing to $0 at higher incomes (around $148,000 AGI). Above that, no standard deduction is allowed and you must itemize. Compare to federal MFJ standard deduction of $30,000 (always available).
How does Wisconsin compare to neighboring states?▼
Wisconsin top rate (7.65%) is higher than Iowa (6.0%), Minnesota (9.85%), Illinois (4.95% flat). Among Midwest states, MN is highest, IL has flat tax (no progressivity), Iowa is mid-tier, and Wisconsin sits between. Indiana (3.05% flat) is the regional low.
Does Wisconsin tax retirement income?▼
Yes, mostly. Wisconsin taxes Social Security at the same rates as other income (one of only 9 states still doing so as of 2026, though phase-outs apply for low/moderate incomes). 401(k), traditional IRA, pension distributions are also taxable. Roth IRA distributions are tax-free if qualified. Military retirement is fully exempt.
What deductions and credits are available for MFJ filers in Wisconsin?▼
Key Wisconsin credits/deductions: Earned Income Credit (4-34% of federal, refundable), School Property Tax Credit (12% of property tax up to $300), Married Couple Credit (3% of lesser earner up to $480), Veterans and Surviving Spouses Property Tax Credit, Low-Income Education Credit, Tuition and Fee Expense subtraction (up to $6,973), and 529 College Savings Contribution Deduction (up to $4,440 per beneficiary).
What is the Wisconsin Married Couple Credit?▼
The Married Couple Credit is unique to Wisconsin — it offsets the 'marriage penalty' for two-earner couples. The credit equals 3% of the lower-earning spouse's qualifying income (capped at $480). For example, if both spouses earn $50k+, the credit is the maximum $480. If the lower earner makes $10k, credit is $300. This partially compensates for higher MFJ brackets pushing dual-income earners into higher rates.
When is the 2026 Wisconsin tax filing deadline?▼
Tax year 2026 returns are due April 15, 2027 (matching federal). Wisconsin grants automatic extension to October 15, 2027 if you file federal Form 4868 and check the Wisconsin extension box on Form 1. Tax owed must still be paid by April 15 to avoid interest. Wisconsin DOR runs an Electronic Filing system with refund within 4-12 days for direct deposit.