•The cost of prison care and the problems associated with it means alternatives might be preferred.•Evidence suggests that cautions are more effective deterrents than arrests and that offenders sentenced to community rehabilitation were less likely to reoffend.•A further advantage of this is that some of the problems that occur in prison (e.g. prisonisation, deindividuation, suicide, lack of employment and effects on the family) can be avoided by non-custodial sentences.