Wisconsin’s 30% long-term deduction
Wisconsin excludes 30% of net long-term capital gain from income, and 60% for gains on qualifying farm assets. The remaining 70% is taxed through four brackets from 3.5% to 7.65%, which puts the top effective rate on a long-term gain at about 5.4%. Short-term gains get no deduction.
For a single filer whose Wisconsin taxable income, after the deduction, rises from $60,000 to $110,000, tax goes from $2,576 to $5,226. Wisconsin has its own deferral for gains reinvested in qualified Wisconsin businesses, with separate approval. A federal surviving spouse files as head of household in Wisconsin when eligible, not as joint.
Wisconsin capital deductions and actual state filing status
Wisconsin’s actual 2026 Form 1-ES instructions publish indexed 3.5%, 4.4%, 5.3% and 7.65% schedules. Wisconsin state filing categories are single, joint, separate and head of household. A federal qualifying surviving spouse in a later year does not automatically use the Wisconsin joint chart; the actual state instructions permit eligible taxpayers to use Wisconsin head-of-household treatment.
Prepare the state capital-gain adjustment from the Wisconsin basis and netting worksheet. The usual eligible long-term deduction is 30%; qualifying farm assets may receive 60%. Farm qualification and holding period must be established, and recapture ordinary income does not become qualifying farm long-term gain. Special deferral, reinvestment and opportunity-fund rules require their own approved reconciliation rather than a guessed exclusion.
Enter actual Wisconsin filing status, approved annual taxable bases after deductions and exemptions, and complete usable nonrefundable credits in the resident estimate. Whole-dollar annual schedule rounding follows continuing return instructions; final 2026 filing-table intervals remain separate. Use entered final liabilities for source allocation, unsupported additional assessments, refunds or special categories. Federal sale inputs never automatically deduct 30% or 60% from the Wisconsin fields.
Wisconsin preparation checklist
- Actual Wisconsin status and approved 30% / qualifying 60% gain deduction
- Federal surviving spouse may use state head
- Approved qualifying farm versus ordinary gain