Wisconsin HSA Tax Rules: Graduated Brackets, No Local Tax Layer
Wisconsin conforms to federal HSA tax treatment. Unlike several neighboring states that have shifted to a single flat rate, Wisconsin still uses four graduated brackets -- but it shares one simplifying feature with Arizona: no local income tax layer at all.
Key takeaways
- Wisconsin conforms to federal HSA tax treatment -- contributions, growth, and qualified withdrawals are all state-tax-free.
- Wisconsin uses four graduated brackets (roughly 3.5% to 7.65%), unlike several neighboring states that have moved to a flat rate.
- Wisconsin has no city or county income tax -- only the state brackets apply.
Full conformity
Wisconsin follows federal HSA rules: contributions are deductible on the Wisconsin return, investment growth isn't state-taxed, and qualified withdrawals stay tax-free.
Graduated brackets, not flat
Wisconsin uses four progressive brackets, roughly from 3.5% up to 7.65% at the top. Your exact HSA tax savings depends on which bracket your income falls into -- unlike a flat-rate state, there's no single percentage that applies to everyone.
No local tax layer
Wisconsin has no city or county income tax layered on top of the state brackets. Whatever your state bracket determines is the complete picture -- no separate local calculation to verify, the same simplifying feature Arizona has.
Sources: Wisconsin Department of Revenue; IRS Publication 969 for federal HSA treatment.