Background: Nonsuicidal self-injury (NSSI) is a strong predictor of suicide attempts (SA). Characteristics of NSSI have been shown to influence the NSSI–SA relationship; however, the temporal nature of this association is understudied. Aims: This study aimed to elucidate the NSSI-SA relationship by examining the association between NSSI characteristics and time lapsed from NSSI onset to first SA. Method: Participants were 111 individuals with a history of NSSI that preceded their first SA who completed a series of self-report measures. Results: NSSI methods of cutting and burning, and the anti-dissociation function, were associated with a shorter transition time from NSSI to SA. Earlier age of NSSI onset and the interpersonal boundaries function were related to a longer time to transition. Limitations: This sample size was limited, and data were collected cross-sectionally. Conclusion: Findings provide foundational knowledge regarding NSSI characteristics to inform theoretical models of the NSSI–SA association. This information can inform suicide risk assessments among those with a history of NSSI.