This study analyses determinants of the presence of an intimate partner during face-to-face interviews. Based on theoretical assumptions about opportunity structure, social control, social support, and companionship, we investigated partner presence using data from the first wave of the German Family Panel (pairfam). Descriptive results revealed that an intimate partner was present in every seventh interview. Multivariate results using separate logistic regression models for the presence of the female (n = 3,272) and the male partner (n = 2,348) revealed that the opportunity structure, such as the couple’s living arrangements or their employment status, had the greatest influence on the …