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Wisconsin · espp state

ESPP taxation in Wisconsin: ordinary income, qualifying dispositions, and payroll

How Wisconsin taxes the ESPP discount (ordinary income at purchase) plus capital gains on the sale side, layered with the federal qualifying-disposition rules.

What Wisconsin residents actually pay

Wisconsin taxes ordinary income at a top marginal rate of 7.65%. RSU settlement value, NSO exercise spread, and ESPP discount income all count as ordinary wages for this purpose and flow through the state's normal brackets.

30% long-term capital gains deduction.

Two taxable events, one plan

An ESPP produces two taxable events. The first is ordinary discount income at purchase (for non-qualified plans or disqualifying dispositions of qualified plans), which Wisconsin taxes at up to 7.65%. The second is capital gain or loss on sale, taxed at long- or short-term rates federally and at a preferential state rate.

Qualifying disposition math

A qualifying disposition requires you hold the shares two years from offering date and one year from purchase. Holding that long converts some of the gain to long-term federal capital gains, which for a high earner in Wisconsin still costs 7.65% state plus federal LTCG rates. The trade-off: two years of concentration risk in your employer's stock.

Payroll reporting

Discount income at purchase flows through W-2 Box 1 and is withheld on payroll. The cost basis reported on Form 1099-B usually excludes the W-2 income component, so you must adjust on Form 8949 to avoid double-taxation. This is the most common ESPP filing error.

Frequently asked

Does Wisconsin tax RSU income the same as wages?
Yes. Wisconsin treats RSU ordinary income as wages, taxable at the state's top marginal rate of 7.65%. Supplemental-wage federal withholding (22%, or 37% above $1M YTD) does not adjust for state withholding, so you often owe extra at filing.
What happens if I exercise ISOs while living in Wisconsin?
Wisconsin does not run a separate state AMT, so only federal AMT applies. You still need to model the bargain element carefully if you plan a cashless exercise-and-sell.
I moved to Wisconsin from another state. Who taxes my vesting RSUs?
Most high-tax states (CA, NY, MA) source RSU ordinary income to workdays between grant and vest. If your grant pre-dates your Wisconsin move, expect the old state to tax the portion of each tranche attributable to workdays earned there. Wisconsin taxes the remainder.
Can I reduce Wisconsin taxes by timing my RSU sales?
Wisconsin gives preferential treatment to long-term capital gains. Holding RSU shares 12+ months past vest can produce both federal and state savings. Weigh concentration risk before using this as a reason to hold.

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