The Wisconsin Domestic Partnership Law provides legal recognition of same-sex partnerships in Wisconsin (WI Stat. Sec. 770.01 et seq.).
The Law expressly provides that the legal status of domestic partnership is not substantially similar to that of marriage. The state constitution prohibits any law that gives unmarried individuals legal status that is substantially similar to that of marriage.
Effect of federal law. The recognition of same-sex domestic partnership under state law does not extend to benefits and protections provided to married couples under federal statutes such as the Internal Revenue Code. Any federal tax deductions or benefits that might be made available for a spouse are not available to a domestic partner.