529 deduction: YesTax parity: No — Wisconsin plans only
In-state plans only
Most states that offer a 529 tax break only give it for their own in-state plan, and Wisconsin follows that rule: the deduction applies only to the state's own plans, Edvest and Tomorrow's Scholar. Contributions to another state's 529 get no Wisconsin deduction. Only nine "tax-parity" states let you deduct contributions to any state's plan, and Wisconsin is not among them.
The deduction
For 2026, Wisconsin taxpayers can deduct up to $5,280 per beneficiary — for single filers or married couples filing jointly ($2,640 each for married filing separately). Because the limit is per beneficiary, a family saving for three children can deduct up to three times that amount. Contributions above the annual limit are not lost: the excess carries forward to future tax years. The figure adjusts annually — confirm the current one with the Wisconsin plans.
How it fits with the gift-tax rules
A 529 contribution is also a gift for federal purposes, so it counts toward the $19,000 annual exclusion (2026). The 5-year election ("superfunding") lets you front-load up to $95,000 per donor per child without using any lifetime exemption.
See how much you can front-load with the 529 Superfunding Calculator, and keep family contributions within the exclusion with the Gift Tax Calculator.
529 deductions & credits in other states
Tax-parity states let you deduct contributions to any state's 529 plan; the rest limit the benefit to their own plan.
Tax parity: Arizona · Arkansas · Kansas · Maine · Minnesota · Missouri · Montana · Ohio · Pennsylvania
Own-plan deduction or credit: New York · New Jersey · Connecticut · Massachusetts · Rhode Island · Vermont · Illinois · Indiana · Michigan · Iowa · North Dakota · Virginia · Maryland · District of Columbia · West Virginia · Georgia · South Carolina · Colorado · New Mexico · Utah · Idaho · Oregon · Oklahoma · Alabama · Mississippi · Louisiana · Nebraska
General information, not tax advice. 529 deduction rules and limits change yearly and this page may not reflect the latest figure — confirm with the Wisconsin plans and your CPA. Wisconsin limits the deduction to its in-state plans as of recent guidance.
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