This study examines the effect of marriage on the conditional probability of different types of serious offending (violent, property and drug offences) over the life course for a group of high-risk males and females. Using the Trend Vector Model, results suggest that over time, marriage is linked to decreases in the likelihood of property offending in males relative to violent and drug offending, and to increases in the likelihood of property offending in females relative to the likelihoods of violent and drug offending. These findings demonstrate that the relationship between marriage and offending not only is dynamic in nature but also differs between types of offences.