Wis. Stat. § 301.325
The department may charge a prisoner or a prisoner's estate for some or all of the costs to the department of the prisoner's incarceration or burial or cremation and burial under s. 157.02(5). The department may collect from the inmate or his or her estate during his or her incarceration or after his or her release or death, or both. If the prisoner has paid all victim restitution ordered under s. 973.20 or if the department has collected victim restitution pursuant to s. 973.20(11) (f), the department may use any remaining money held for a prisoner under s. 301.32(1) to pay for some or all of the costs to the department for the prisoner's burial or cremation and burial under s. 157.02(5). Upon the request of the department, the attorney general may bring a civil action to recover costs under this section that the department has been unable to collect. The department may not recover under this section for any costs already recovered as otherwise provided in chs. 301 to 303. The department shall promulgate rules providing a method of charging under this section that is based on a prisoner's ability to pay and providing procedures for collection of the costs.
Wis. Stat. § 301.325