The most common penalty imposed on assault offenders is a bond but the likelihood of a prison sentence increases with both the seriousness of the assault and the number of prior convictions. Approximately 23 per cent of offenders convicted of a serious assault causing injury received a prison sentence, compared with 5.3 per cent of offenders convicted of a common assault. An assault offender with no prior convictions faces a 2.8 per cent chance of imprisonment. By contrast, an assault offender with four or more prior convictions faces a 42.9 per cent chance of imprisonment. Among those who received prison sentences, the average minimum term was 9 months and the average aggregate sentence was 15 months.