This report focuses on individual financial support networks which supplement the incomes of persons who live in different households. It introduces a new data set from the Survey of Income and Program Participation (SIPP). Information was collected in a supplement to the SIPP conducted between January and April 1985 in about 17,000 households. Statistics cover persons of 18 years and over who were regularly making cash payments for the support of persons living in another household during 1985. Results indicated that the likelihood of providing and receiving financial assistance is determined by the life cycle status of both providers and recipients, while the amount of payment is determined by the financial resources of the providers. It was also reported that: (1) the most frequent causes for financial need among nonhousehold members are marital disruption and aging; (2) families vary more in their abilities to pay than in their reasons for supporting nonhousehold family members; (3) child support makes up 11 percent of the annual family income of women who receive it. The report includes 27 charts and 3 tables. Appendices provide an overview of the SIPP program, definitions, specifications of sources and reliability of estimates, discussions of data, findings of a loglinear regression analysis, and facsimiles of SIPP questionnaires. (RH)