Criminal justice reforms and corrections cost forecasts require appropriate estimates of the marginal costs of incarceration to adequately assess cost. Verkkoincarceration trends for all states and counties since 1970: Examine jail and prison populations, incarceration rates, and racial disparities. Verkkopayer cost of incarcerating a sentenced adult offender to state prison in 40 states, and presents a methodology states can use to calculate their total prison costs. Verkkomany states spend tens of thousands of dollars per year to incarcerate a single person — rivaling what it would cost would cost to send them.